Fluid Control Valves for Onshore Use NAKAKITA PRODUCT CATALOG
1 Nakakita's fluid control systems have been employed in large ships, power generation facilities, and various plants, contributing greatly to the development of Japan's economy and social infrastructure. For large commercial transport vessels, we have continued to provide total systems for safe and efficient operation, including fluid control centered on valves, attitude control, and cargo handling control. FCV for Onshore Use / Message Moving forward NAKAKITA FCV PRODUCT CATALOG Cylinder Valves Control Valve Butterfly Valve After-sales Service Safety Valves Regulating Valve
2 Butterfly Valves (Hydraulic) Mixing Valves Cylinder Valves (Shutoff Valves) Two-way Control Valves NAKAKITA FCV PRODUCT CATALOG
3 NAKAKITA FCV PRODUCT CATALOG Fluid Control Valve FCV for Onshore Use LNG-fired Power Generation Our various types of valves, including remote control equipment, are used in a wide range of industrial elds, and we are proud of the high quality of our products, backed by our extensive track record. Since each product is custom made to order, we provide satisfactory services through integrated design, manufacturing, and after-sales service tailored to each customer's needs. Generates electricity using natural gas as fuel. Chemical Plant A plant that produces chemicals from raw materials such as oil and natural gas. Ammonia Power Generation Generates electricity using ammonia as fuel. Hydrogen Power Generation Generates electricity using hydrogen as fuel. Geothermal Power Generation Generates electricity using geothermal energy. Methanation-based Synthetic Fuel Production Plant A facility to produce methanol from carbon dioxide and hydrogen. Biomass Power Generation Generates electricity using biological resources derived mainly from plants and animals.
4 NAKAKITA FCV PRODUCT CATALOG Examples of Use Combined Cycle Power Plants Boilers, Steam Turbines, etc. Gas Turbine Steam Turbine Power Generator Fuel Cylinder Valve Cylinder Valve Control Valve Cylinder Valve Control Valve Control Valve Butter y Valve Condenser Exhaust Heat Recovery Boiler Air Compressor Air Steam Turbine Power Generator Fuel Condenser Condensate Pump Water Supply Pump Boiler Economizer Heater Evaporator Safety Valve ←Coolant →Coolant Air Burner Level Switch Level Controller Boiler Feedwater Pump Water Supply Tank Supply Water Deaerator Feedwater Pump Deaerator Safety Valve Economizer Control Valve Control Valve Control Valve Self-operated Regulating Valve Products in red: Nakakita's production range
We employ drive units that operate with high precision, and internal valves manufactured using our advanced manufacturing technology to achieve high controllability. In addition, ow characteristics can be selected according to individual requirements because of our custom-made production system. Function Type Control method Rated pressure Bore size Connection Temperature Actuator Flow characteristics Rangeability Fluid Material Public accreditation Control value Two-way valve/three-way valve Pneumatic / electric / hydraulic JIS 5K to 63K; CLASS 150# to 4500# 15A to 350A Various flanges/SW/BW –253 to 600 °C Forward/reverse/dual acting Water/oil/air/steam/various gases, etc. 1:20 to 1:50 Steam/water/oil/air/gas, etc. Cast iron/cast steel/alloy steel/stainless steel, etc. High Pressure Gas Safety Act, Classification societies (NK, LR, DNV, etc.) ■Basic Specifications Three-way Rotary Control Valve Two-way Control Valve Three-way Control Valve Electric Motor Valve Fuel Control Valve FCV for Onshore Use / Control Valves We can provide tailor-made solutions for a variety of requirements. Please contact us for details. Nakakita has a wealth of experience in supplying control valves in a variety of fields, from high-temperature and high-pressure applications to ultra-low temperature or vacuum applications, and we design and supply the optimum valve for each customer's specific requirements. 5 NAKAKITA FCV PRODUCT CATALOG
DY-CNDOO Our products meet the most demanding installation conditions. We are proud of the fact that they have been used in a multitude of elds. A top-entry structure is employed for easy replacement of the inner valve (trim) without removing the body from the piping when performing maintenance. High controllability is achieved by selecting the appropriate valve characteristics in terms of trim type and shape, depending on the control target. In addition to the standard trims, multi-port cage and labyrinth trims that prevent cavitation and erosion, and low-noise trims that reduce noise can also be used. We can exibly accommodate requests for changes in assembly direction, installation position of accessories, and speci cation of the range of valve openings to be used, according to the installation environment in which the product will be used. Thermal power plants, nuclear power plants, waste incineration facilities, gas plants, chemical plants, paper mills, steel mills, oil refineries, biomass power plants, LNG carriers, oil tankers, container ships, car carriers, Ministry of Defense (naval ships), etc. Since we design each unit individually, we can respond to special requirements on an individual basis. Product Features ■Major Customers In addition to the requirements of standards and regulations, we can exibly respond to traceability and requests for additions or modi cations to testing procedures. We can also accommodate individual requests for special paints, separate painting for the drive and body parts, and the position of the equipment number. DY-CCSSO Ultra-low temperature applications such as LNG and liquefied hydrogen Ammonia and other toxic / corrosive fluids Geothermal power generation: hydrogen sulfide resistant Cold and tropical regions Vacuum conditions Hazardous areas: explosion-proof, intrinsically safe, etc. Seaside areas: salt damage resistant Outdoor environments: waterproof and dustproof 6 NAKAKITA FCV PRODUCT CATALOG
Function ON-OFF control (shutoff valve) Driving method Pneumatic / hydraulic Rated pressure JIS 5K to 63K; CLASS 150# to 4500# Bore size 10A to 300A Connection Various flanges/SW/BW Temperature –196 to 600 °C Actuator Forward/reverse/dual acting Fluid Water/oil/steam/air/various gases, etc. Material Cast iron/cast steel/alloy steel/stainless steel, etc. Public accreditation High Pressure Gas Safety Act, Classification society (NK) Supported Valve Shapes ■Basic Specifications Closing capability · Metal sheet: ANSI CLASS V · Soft sheet: ANSI CLASS VI Operating speed We will accommodate your request. NS650ELOO-DA Globe Type Angle Type Three-way Type Gate Type FCV for Onshore Use / Cylinder Valves We can provide tailor-made solutions for a variety of requirements. Please contact us for details. Nakakita's cylinder valves, the result of our extensive experience and technological excellence, promise a drive unit matched to the internal valve structure, an operating speed that meets process requirements, and a reliable closing capability. Nakakita has a wealth of experience in supplying cylinder valves in a variety of fields, from high-temperature and high-pressure applications to ultra-low temperature or vacuum applications, and we design and supply the optimum cylinder valve for each customer's specific requirements. 7 NAKAKITA FCV PRODUCT CATALOG
Thermal power plants, nuclear power plants, waste incineration facilities, gas plants, chemical plants, paper mills, steel mills, oil refineries, biomass power plants, LNG carriers, oil tankers, container ships, car carriers, Ministry of Defense (naval ships), etc. ■Major Customers Nakakita's cylinder valves are designed to be thoroughly interchangeable and easy to maintain. The main unit, drive unit, manual device, and various accessories are all integrated into a single unit for easy replacement. We can replace parts, supply consumables, and dispatch service personnel to your site over a long period of time. Manual devices, solenoid valves, locking valves, positioners, etc. Limit switches, proximity switches, valve position transmitters, etc. Air lters, regulators, and lubricators Speed control valves, air-operated valves, rapid exhaust valves, oil chambers, etc. Our products are able to meet the most demanding installation conditions. We are proud of the fact that our products have been used in a multitude of elds. Product Features Ultra-low temperature applications such as LNG and liquefied hydrogen Ammonia and other toxic / corrosive fluids Geothermal power generation: hydrogen sulfide resistant Cold and tropical regions Vacuum conditions Hazardous areas: explosion-proof, intrinsically safe, etc. Seaside areas: salt damage resistant Outdoor environments: waterproof and dustproof •We have been certi ed by the Minister of Economy, Trade and Industry under the High Pressure Gas Safety Act for valves for high-pressure gas in the categories of 49.1 MPa or lower and ultra-low to high temperature ranges, and have delivered such valves to LNG facilities and various other high-pressure gas facilities. • We have passed the environmental tests for unmanned shipboard equipment conducted by various classi cation societies, and have earned the trust of ships navigating the world's oceans. 8 NAKAKITA FCV PRODUCT CATALOG
FCV for Onshore Use / Butterfly Valves Features of Nakakita's Butterfly Valves •Non-leak type (completely closed: depends on valve seat structure) •Low valve operating force • Lightweight and compact •High quality and high reliability due to mass-produced products • Usable in a temperature range from high to very low, depending on structure and material • Manual, hydraulic, pneumatic, and electric drives can be selected Nakakita's butterfly valves can be adapted to various situations by structuring them according to application. Nakakita's long years of experience and technical capabilities allow us to meet the requirements of each user's environment. ■Concentric Type Eccentric type Concentric type ■Rubber Seat ■Resin Seat ■Metal Seat ■Eccentric (Double Eccentric) Type Features Features •The valve seat is tted into the inner surface of the body and the inner surface is covered, so that the body and the stem do not come in contact with the uid. •Compact, lightweight, small pressure drop, and easy ow rate adjustment. •Valve seat with elasticity and the best sealing performance. •Selectable from NBR, FKM, and EPDM materials according to application. •Both concentric and eccentric types are available (FKM is available only for the eccentric type). •PTFE (polytetra uoroethylene) is employed for superior chemical resistance. •The seat structure consists of a seat part and a retainer part, and only the PTFE seat can be replaced. •Only eccentric type is available. ・NBR (nitrile butadiene rubber): High nitrile content type with excellent oil resistance ・FKM ( uoro-rubber): Can be used for uids to which NBR cannot be applied, such as gasoline. ・EPDM (ethylene-propylene rubber): Excellent environmental resistance and can be used at relatively high temperatures A valve with a structure in which the disc's center of rotation and the seat surface are on the same line. A valve with a structure in which the seat surface and piping center are not located in line with the center of the disc's rotation. •Except in the fully closed position, the valve seat and disc do not come into contact with each other, reducing wear on the seat surface. •Valve seat material can be rubber, metal, and resin (PTFE) depending on the application (structure differs depending on the material). •When replacing the valve seat, only the seat part can be replaced (no need to disassemble the valve). •CR rubber can be used for lining the inner surface of the body (special speci cations). •Applicable over a wide temperature range from high to very low temperatures. •Can handle corrosive uids, including solvents, through material selection. •The sealing section is made in the shape of a lip to provide elasticity. •Minute scratches can be removed by polishing the sheet surface. •Fireproof structure. •Only eccentric type is available. Main Unit Seat Part Stem Taper pins Body Disc Seat Bonnet Concentric type Eccentric (double eccentric) type 9 NAKAKITA FCV PRODUCT CATALOG
Drive Unit ■Electric Actuator •Drive unit powered by an electric motor in the unit. •Various functions are available according to speci cations (protection class: IP68, explosion-proof, installation of torque switches, etc.). •Unlike hydraulic or pneumatic systems, there is no need to install piping for operation (only cable connection is required). •Available from mechanical type to intelligent type (selectable according to application). •Manual operation is possible in case of emergency. •Self-locking is possible, and the valve does not open under uid pressure. ■Manual Actuator •Drive unit operated manually with a handle. •Can be operated while directly checking valve position. •Self-locking is possible, and the valve does not open under uid pressure. ■Hydraulic Actuator •Drive unit operated by hydraulic power generated by a hydraulic pump. • High-pressure operation allows for a compact cylinder section. • Hydraulic uid is incompressible, resulting in good actuation response. ■Pneumatic Actuator •Drive unit operated by air pressure generated by compressor. •Remote operation is possible. •No hydraulic oil is used, so there is no need to bleed air, as is done with hydraulic systems. •Various controls are possible by installing instrumentation. Standard valve List of Drive Unit Specifications Lever Worm Top Handle Fork lever Dual-acting Single-acting Part-turn Multi-turn Dual-acting Single-acting Indoor Indoor / outdoor Indoor Indoor / outdoor Indoor / outdoor Indoor / outdoor Indoor / outdoor Manual Hydraulic Electric Pneumatic Actuator Type Location Thermal power stations, nuclear power stations, waste incineration facilities, gas plants, chemical plants, paper mills, steel mills, oil refineries, biomass power plants, LNG carriers, oil tankers, container ships, car carriers, Ministry of Defense (naval ships), etc. ■Major Customers ON–OFF control (shutoff valve) Pneumatic / hydraulic / electric / manual JIS 5K to 63K, CLASS 150# to 1500# 15A to 450A Various flanges/SW/BW –50 to 600 °C Pneumatic / hydraulic Forward/reverse/dual acting Water/oil/steam/air/various gases, etc. Cast iron/cast steel/alloy steel/ stainless steel, etc. Function Actuator Rated pressure Bore size Connection Temperature Valve actuation Fluid Material Sluice valve Swing check valve Pneumatic / hydraulic JIS 5K to 63K, CLASS 150# to 900# 80A to 600A Various flanges/SW/BW Saturation temperature to 500 °C Closed upon loss of operating source Steam Cast steel/alloy steel/stainless steel, etc. Function Actuator Rated pressure Bore size Connection Temperature Valve actuation Fluid Material Extraction check valve Applicable Range of Valve Seat Material (Rubber/Resin) NBR FKM EPDM PTFE (without filler) PTFE (with carbon) Rubber Valve seat material Applicable temperature Water Seawater Steam Gas Air Chemicals Oil Petroleum products (solvents) Fluid Resin 0 to 70 °C 0 to 90 °C 0 to 130 °C –50 to 150 °C 0 to 250 °C ◎ ◎ ◎ ◎ △ ◎ ◎ ○ ◎ △ ◎ ◎ × ○ △ △ ○ × ◎ △ × ○ × ◎ △ △ △ ― ◎ △ × ○ ― ◎ △ ○ ○ ○ ◎ △ Butterfly Valve Standard Specifications List Function Actuator Design pressure Bore size Connection Temperature Valve actuation Fluid Body material ON–OFF/flow control Pneumatic / hydraulic / electric / manual Max.1.0 MPaG 50A to 800A Flange connection (wafer/flange) 0 to 70 °C (seat material: NBR) 0 to 90 °C (seat material: EPDM) 90° rotation Water / seawater Cast iron/cast steel ON–OFF/flow control Pneumatic / hydraulic / electric / manual Max.1.6 MPaG 80A to 800A Flange connection (wafer/flange) 0 to 130 °C (See the scope of application of seat material) 90° rotation (See the scope of application of seat material) Cast iron/cast steel/alloy steel/ stainlesssteel, etc. ON–OFF/flow control Pneumatic / hydraulic / electric / manual Max.1.6 MPaG 80A to 800A Flange connection (wafer/flange) 0 to 250 °C (See the scope of application of seat material) 90° rotation (See the scope of application of seat material) Cast iron/cast steel/alloy steel/ stainlesssteel, etc. ON–OFF/flow control Pneumatic / hydraulic / electric / manual JIS 5K to 16K, CLASS 150# to 600# 80A to 800A Flange connection (wafer/flange) –253 to +520 °C (Applicable range depends on metal material) 90° rotation Water / seawater / oil / steam / air / gas / liquefied gas, etc. Cast iron/cast steel/alloy steel/ stainless steel, etc. Flow control Pneumatic / hydraulic / electric / manual JIS 5K to 16K, CLASS 150# to 600# 150A to 800A Flange connection (wafer/flange) Ambient temperature to 520 °C 90° rotation Water/seawater/oil/steam/air/gas, etc. Cast iron/cast steel/alloy steel/ stainless steel, etc. Concentric-type with rubber seat Butter y valve (IC type) Double eccentric-type with rubber seat Butter y valve (DR type) Double eccentric-type with resin seat Butter y valve (DT type) Double eccentric-type with metal seat Butter y valve (DM type) Double eccentric damper type Butter y valve (DD type) 10 NAKAKITA FCV PRODUCT CATALOG
FCV for Onshore Use / Safety Valves & Safety Relief Valves Pilot-operated type Safety valve (closed type) We can provide tailor-made solutions for a variety of requirements. Please contact us for details. Standard Disc (Flexible disc) Super Disc (Elastic lip-type flexible disk) Function Type Applicable laws & regulations Rated pressure Bore size Connection Temperature Pressure Fluid Material Public accreditation Safety valves and safety relief valves JIS10K to 140K, CLASS 150# to 2500# 25A to 200A Various flanges/SW/BW/threaded –196 °C to 565 °C 0.025 MPa to 24.1 MPa Water/oil/steam/air/various gases, etc. Cast steel/alloy steel/stainless steel, etc. High Pressure Gas Safety Act, ASME V and UV stamps, classification societies (NK, LR, DNV, etc.) ■Basic Specifications Spring-loaded type (conventional or balanced bellows), pilot-operated type Electricity Business Act/Gas Business Act/High Pressure Gas Safety Act/Construction Code for Boilers/Construction Code for Pressure Vessels/ASME Code Section I, VIII, XIII/Korea Gas Safety Corporation (KGS)/Korea Occupational Safety and Health Agency (KOSHA)/Ship Classification Certificates (NK/LR/DNV/BV/CR/KR/JG etc.) Cap Adjusting screw Locknut Cap gasket Stem Upper spring plate Lower spring plate Bonnet bolt Bonnet gasket Disc guide Disc Body Ring lock screw gasket Upper ring lock screw Lower ring lock screw Upper adjusting ring Lower adjusting ring Nozzle Bonnet nut Spring Bonnet Disc Structure Nakakita's safety valves are valves that prevent damage to equipment from overpressure by automatically releasing the fluid in the equipment when the pressure in various pressure vessels and piping rises to a pre-set pressure. These valves have been used in a wide range of applications, from high-temperature, high-pressure applications to ultra-low-temperature applications, and have a proven track record of use in a wide variety of elds. These valves always demonstrate well-balanced actuation performance (popping/closing), which is the most important performance of safety valves, under all operating conditions. Moreover, the discharge capacity is guaranteed by the National Board of Boiler and Pressure Vessel Inspectors (U.S.) based on ASME BPVC (SEC. I/SEC. XIII), so you can use these valves with con dence. 11 NAKAKITA FCV PRODUCT CATALOG
Product Features Our products meet the most demanding installation conditions. We are proud of the fact that they have been used in a multitude of elds. We also support initiatives for a decarbonized society. We also supply consumables and parts to ensure that our customers can use our safety valves with con dence after delivery. We dispatch service personnel to the site as needed to quickly respond to customer needs (main work: periodic overhaul, maintenance, safety valve installation, hydraulic jack sealing test, etc.) In order to prevent leakage from the seat due to thermal distortion, the material, shape, and structure of the valve disc and nozzle have been carefully considered, and the seat surface has been nished using our unique lapping technology to ensure a tight t during use, eliminating problems caused by leakage. Since the valve disc and nozzle are all at seats, lapping can be easily performed if necessary to maintain the valves in a sound condition at all times. Seaside areas: salt damage resistant Outdoor environments: waterproof and dustproof Ultra-low temperature applications such as LNG and liquefied hydrogen Ammonia and other toxic/ corrosive fluids Geothermal power generation: hydrogen sulfide resistant Example of accessories Spring cover Exhaust pipe Drainpipe Outlet pipe Drip pan Rainproof cover, spring cover, exhaust pipe with drip pan, back pressure relief pipe, anti-vibration support, phase ange, test gag, limit switch, water pressure test plug, lift measuring instrument, lapping tool, etc. Thermal power plants, nuclear power plants, hydroelectric power plants, biomass power plants, waste incineration facilities, gas plants, chemical plants, paper mills, steel mills, oil refineries, LNG carriers, oil tankers, container ships, car carriers, Ministry of Defense (naval ships), etc. ■Major Customers 12 NAKAKITA FCV PRODUCT CATALOG
FCV for Onshore Use / Self-operated Regulating Valve (Pressure/Temperature/Liquid level) Self-operated pressure regulating valves do not use any auxiliary power source such as air or electricity, but receive the power necessary for valve actuation directly from the object to be regulated through the sensor. The type using a metal bellows (diaphragm) in the sensor can be used in a Pressure Regulating Valves Bore size Rated pressure Connection Temperature Fluid Material Public accreditation 15A to 150A JIS 5K to 63K. CLASS150# to 1500# Various flanges/SW/BW/threaded –196 to 400 °C Water/oil/air/steam/various gases, etc. Cast iron/cast steel/alloy steel/stainless steel/bronze, etc. High Pressure Gas Safety Act, classification societies (LR, DNV, etc.) ■Production Range Primary Pressure Regulating Valves (Relief Valves, Back Pressure Valves, Vent Regulators, Back Pressure Regulators, etc.) •Regulating pressure of various atmosphere gas generators •Regulating pressure in fuel oil lines and lubricating oil lines •Regulating pressure in LNG and LPG lines •Regulating discharge pressure around pumps and receivers, etc. Main Uses Secondary Pressure Regulating Valves (Pressure Reducing Valves, Pressure Regulating Valves, etc.) •Regulating pressure in main and pilot lines of various atmosphere gas generators •Regulating pressure in various combustion equipment lines •Regulating pressure in LNG and LPG lines •Pressure reducers for various types of piping from high pressure to very low pressure, etc. Main Uses Differential Pressure Regulating Valves (Differential Pressure Regulating Valves, Equalizing Valves, Ratio Regulators, Zero Regulators, etc.) •Regulating pressure in main and pilot lines of various atmosphere gas generators •Regulating fuel line pressure for boiler combustion equipment •Regulating pressure in main lines of re extinguishing equipment Main Uses Note: This example piping structure diagram showsthe NS93R-2 model. Note: This example piping structure diagram shows the NS53 model. Note: This example piping structure diagram shows the NS61 model. Primary pressure Secondary pressure Secondary pressure Primary pressure Primary pressure Nakakita's self-operated regulating valves are economical because all the elements required for automatic control, detection (sensor) + adjustment (controller) + operation (actuator), are built into a single valve. Depending on the nature of the process, installation location, and required accuracy, a self-operated regulating system may be suf cient to achieve the intended purpose. We propose self-operated regulating valves that are optimal for various control targets (pressure, temperature, and liquid level) and that also realize economic ef ciency and resource conservation. wide range of temperatures from very low to high. The stem section has no gland, so there is no need to worry about external leakage, and since it does not require a power supply, it is also suitable for use in hazardous areas. 13 NAKAKITA FCV PRODUCT CATALOG
Thermal power plants, nuclear power plants, LNG facilities, waste incineration facilities, oil refineries, chemical plants, ships, etc. Temperature Regulating Valves ■Major Customers Bore size Rated pressure Connection Regulatable temperature Fluid Material Public accreditation 15A to 150A 5K to 20K JIS flanges 40 °C to 90 °C/60 °C to 110 °C/90 °C to 130 °C Steam/water, etc. Cast iron/cast steel/stainless steel, etc. Classification Society (NK) This oat valve uses a oat ball to open and close the valve. This valve is installed in a tank of oil, water, etc., and the oat is adjusted to the liquid level to be controlled. The liquid level can be adjusted by changing the angle and length of the lever that xes the oat. This unit is for starting up emergency gas turbine power generation equipment. It has two functions, pressure reduction and shutoff, and does not require a shutoff valve, making the equipment smaller, lighter, and more cost-effective. Three-way Temperature Regulating Valves (Wax Valves) Float Valves Startup Valve Unit Bore size Rated pressure Connection Set temperature Fluid Material Public accreditation 25A to 200A JIS 5K,10K; CLASS 125#, 150# Various flanges 30 °C to 95 °C Water/oil, etc. Cast iron/cast steel/stainless steel, etc. Classification Society (DNV) Bore size Rated pressure Connection Fluid Material 25A / 40A / 50A / 80A JIS 5K,10K; CLASS 150# Various flanges Water/oil, etc. Cast iron Bore size Rated pressure Connection Fluid Material 50A/65A JIS 30K, CLASS 600# Various flanges Air Cast steel This temperature regulating valve is operated by the evaporation pressure of the enclosed liquid in the heat-sensitive cylinder inserted in the temperature sensor. The valve uses a pilot-operated system, which enables more sensitive and accurate temperature control than a direct-acting system. It can be used for heating heavy oil heaters, hot water tanks, etc. This is a three-way valve with a high-performance wax thermostat and is used to regulate the temperature of cooling water, lubricating oil, hydraulic oil, etc. supplied to various engines, turbines, compressors, reduction gears, etc. It is applicable to both ow-dividing and mixing types, and is equipped with a valve position indicator. In cases of emergency, the valve can be operated manually. 14 NAKAKITA FCV PRODUCT CATALOG
FCV for Onshore Use / Twin Power (Air Operating Actuators) Twin Power is an actuator that converts the reciprocating motion of an air motor (piston type) into rotary motion by means of a unique rotary feed mechanism (lever ratchet) to allow remote or automatic operation of a rotating shaft such as a valve spindle. Valve position can be indicated remotely by pneumatic or electrical signals. Structure ❶ ❷ ❸ ❹ ❺ ❻ ❼ Air motor (piston type) Operation cylinder Direction control unit Rotary feed unit Gear Valve position indicator unit Slide block ❶ ❷ ❸ ❹ ❺ ❻ ❼ Lead screw Hub Load ❶ ❶ ❷ ❸ ❹ ❹ ❺ ❻ ❼ Type 14 (single-acting type) Type 214 (dual-acting type) Twin Power Application Example Explanatory Video Twin Power Structure Explanatory Video Nakakita's Twin Power is widely used in various fields of industry as a pneumatic actuator for automation and labor saving of existing and newly installed manual valves as well as for remote operation and automatic control. By attaching Twin Power to any manual valve, the valve can be remotely operated to save plant labor. Robust and reliable, Twin Power requires minimal maintenance even under adverse conditions and can be used for a long period of time. 15 FCV NAKAKITA LINEUP CATALOG
Note: Approximately 10,000 units have been delivered since the start of sales in 1972 through 2020. Thermal power plants, nuclear power plants, water supply and sewerage, oil refineries, pulp and paper mills, chemical plants, steel mills, mines, ships, etc. •The unique torque-up mechanism automatically increases starting torque, making it ideal as a valve actuator. • Simple and compact design for easy installation without removing new or existing manual valves from the line. • Installation can be indoors or outdoors and in any orientation. • All mechanisms are completely unitized, making maintenance and inspection easy, reducing maintenance costs, and guaranteeing long operation times. • Open/close control (ON–OFF), valve position control (any position), and emergency shutoff can all be remotely performed by electric or pneumatic sequence. Twin Power can be used in a variety of facilities. Product Features Application ■Major Customers ・All types of valves (stop valves, gate valves, ball valves, butterfly valves, remote control valves, automatic control valves, etc.) ・Actuators for rotating machinery units Automatic labor saving Emergency shutoff, etc. Automatic control Remote control •Opening/closing torque and speed can be freely adjusted by adjusting the air pressure and supply volume. • A handle is provided for manual operation in case of emergency. An air tank is also provided for emergency valve closure in the event of a power failure. • Pneumatic operation makes it ideal for use in hazardous areas. • The rotary feed system allows single-seat valves to be used for high differential pressure speci cations. 16 FCV NAKAKITA LINEUP CATALOG
FCV for Onshore Use / Level Switches ■Vertical changes in the liquid level (❶) of the process uid are detected by the oat (❷). When this liquid level reaches a certain level, it is transmitted by the magnetic force of the permanent magnet (❺) to the switch mechanism (❹) installed outside the airtight tube (❸), which drives the switch (❻) to convert the liquid level of the process uid into an electrical contact signal. ■The switch unit is completely shut off from the process uid by an airtight tube, eliminating leakage to the outside and ensuring safety. ■By optimally selecting materials for the pressure-resistant parts that come in contact with the liquid, such as the main body (❼) and oat (❷), it can be used with any uid, including high-temperature uids, seawater, acids, and alkalis. Connection Type Application Overview and Principles Boiler drum water level/feedwater heater drain water level/water, seawater, oil tank liquid level/generator system oil level, oil water monitoring/etc. External ball type, side–bottom style External ball type, top‒bottom style Internal ball type, side-flange style Internal ball type, top-flange style Displacement type, top-flange style This gure shows the NS287-71-SIS socket welding type. ❶ ❷ ❸ ❹ ❺ ❻ ❼ Switch Part Pressure-resistant Part Nakakita has delivered tens of thousands of our level switches for alarm and control of various equipment used in various industrial fields, such as power, oil, and other energy infrastructures and ships. We design and provide the most suitable level switches individually for our customer's operating conditions. The switch unit uses a simple mechanism that combines a permanent magnet and a microswitch, and the oat is manufactured using advanced manufacturing techniques to ensure high reliability and durability. 17 NAKAKITA FCV PRODUCT CATALOG
Thermal power plants, nuclear power plants, geothermal power plants, waste incineration facilities, oil refineries, chemical plants, ships, etc. Product Features Basic Specifications ■Major Customers Main type NS287-71, 74, 81, 91 (direct-acting type, for high pressure and high temperature) NS287-81D, 82D, 83D, 84D, 85D (Displacement and depth-measuring type) Water, drain, seawater, oils, LPG, LNH3, etc. VAC to 9.8 MPa –45 °C to 310 °C (470 °C with forced cooling mechanism) 0.65 to 1.05 1B socket weld or 25A flange 1 × SPDT or 2 × SPDT (equivalent to DPDT) Type 71 and 81: ±5, type 74: ±7, type 91: ±10 Carbon steel or stainless steel (nylon coating for seawater applications) Stainless steel or titanium (Teflon coating for seawater applications) Water, drain, seawater, oils, LPG, LNH3, etc. VAC to 9.8 MPa –45 °C to 310 °C (470 °C with forced cooling mechanism) 0.65 to 1.05 1B socket weld or 25A flange 1 × SPDT or 2 × SPDT (equivalent to DPDT) Type 71 and 81: ±5, type 74: ±7, type 91: ±10 Installation example Liquid to be measured Pressure range Temperature range Speci c gravity range of liquid to be measured Connection and bore size Contact con guration Accuracy (mm) Contact capacity Housing Structure Body Material Float Material ・AC type (AC 125 or 250 V, 15 A / DC 125 V, 0.5 A; DC 250 V, 0.2 A; resistive load) ・DC type (DC 125 V, 10A; DC 250 V, 3 A / AC 125 V, 3 A; AC 250 V, 0.75 A; inductive load) ・Waterproof structure, JIS C 0903 water-resistant type conformity (NEMA4 equivalent, IP65 equivalent) ・Explosion-proof structure, TIIS d2G4 (equivalent to NEMA 7 and 9: waterproof structure to withstand outdoor use). •Excellent Heat Resistance The maximum operating temperature is 310 °C due to the temperature reduction mechanism using Nakakita's unique labyrinth ring (350 °C when convection occurs at an ambient temperature of 60 °C or lower). •High Pressure Resistance The main body and oat are guaranteed to be pressure resistant with basic capacity to withstand high pressure and high temperatures of 310 °C and 9.8 MPa, as well as reliable manufacturing technology. •Ease of Maintenance Unitized design provides simple structure and easy maintenance. •Explosion-proof Products Our level switches are Ministry of Health, Labor and Welfare (Technology Institution of Industrial Safety) certi ed. •High Earthquake Resistance The switch unit, which employs a double magnet system, does not malfunction even when subjected to 3G horizontal and 1G vertical vibration. •SCC-resistant Measures High reliability is ensured by SCC-resistant materials and superior manufacturing technology (SCC: stress corrosion cracking). •Easy Adjustment Setting levels can be easily adjusted with the switch unit. •Officially Approved Products Our level switches have passed unmanned shipboard equipment environmental tests conducted by classi cation societies (LR, DNV, NK, etc.). 18 NAKAKITA FCV PRODUCT CATALOG
FCV for Onshore Use / After-sales Service Parts Supply Visit & Repair Support Desk Maintenance & Diagnosis Technical Guidance Prevention & Maintenance For after-sales service and various inquiries about our products, please contact our sales offices at each location. ■Nakakita's One-stop Maintenance Nakakita is not just a manufacturer of valves and other equipment. We offer operator training prior to equipment delivery, as well as proposals for further improvement of proficiency and improved operation of the delivered equipment. We also hold technical workshops and exchange meetings for the purpose of preventive maintenance in response to customer requests. Various Support for Your Needs from Pre-Delivery Support to Improvement Proposals We have established a full support system to ensure the stable operation of delivered equipment, including the establishment of a support desk, a reliable parts supply system, and a system for dispatching engineers. Reliable Customer Support Click here to contact us for more information. ● Inquiry Form on Our Website We provide one-stop operational support for reliable after-sales service, maintenance, diagnosis, renewal, and engineering of equipment by making full use of our solid onsite capabilities based on our long-cultivated experience and know-how. O n e - s t o p Maintenance Operator Training Improved Operation of Delivered Equipment Technical Workshops and Exchange Meetings 81-72-871-1341 TEL ●Head Office (Osaka) 81-3-4212-6315 TEL ●Tokyo Office 81-93-531-5481 TEL ●Kitakyushu Office 19 NAKAKITA FCV PRODUCT CATALOG
■Illustration of Hydrogen Supply Chain with Liquefied Hydrogen Carrier Our Initiatives for Valves for Ultra-low Temperature Applications History Butterfly valve for liquefied hydrogen with vacuum jacket (prototype for testing with LH2) Control valve for ultra-low temperature with vacuum jacket Butterfly valve for ultra-low temperature for LNG Control valve for highpressure and ultra-low temperature for LNG Through product development, we will contribute to the development of supply chains for power generation and other large-scale applications toward the realization of a hydrogen society in the future. Developed control valves and shutoff valves for liquefied hydrogen used in rocket fuel supply lines. From 1970 Developed butterfly valves for low-temperature uses on LPG carriers. Conducted NEDO project "Technological Development of Large Bore Butterfly Valve for Liquefied Hydrogen" jointly with Japan Aerospace Exploration Agency (JAXA). Production Transportation Storage Use Liquefaction /shipping base Valves for liquefied hydrogen Receiving terminal Hydrogen power plant Liquefied hydrogen carrier From 1980 From 1994 From 2005 From 2020 Since the 1970s, we have delivered more than 1,400 valves for ultra-low temperature applications using LH2, LNG, LN2, etc., including rocket fuels. We have also manufactured regulating or shutoff globe valves with vacuum jackets to reduce thermal ingress. From 2020, we have developed the "Technological Development of Large Butterfly Valve for Liquefied Hydrogen" jointly with the Japan Aerospace Exploration Agency (JAXA), with funding from the New Energy and Industrial Technology Development Organization (NEDO). Developed large-bore, globe control valves for air separation equipment facilities. Developed safety valves and self-operated valves for LNG facilities. Started manufacturing and sales of butterfly valves for LNG carriers (business tie-up with Sasakura Engineering Co., Ltd.). Developed control valves for LNG carrier regasification systems. 20 NAKAKITA FCV PRODUCT CATALOG Osaka Head Office & Factory, Tokyo Office, Kitakyushu Office ●Domestic Offices ●After-sales Service Centers We have domestic and international distributors with service personnel on staff. Please contact our sales representatives. Osaka Head Office & Factory
URL：https://www.nakakita-s.co.jp/en Head Office and Factory 1-1 Fukonominami-cho, Daito-shi, Osaka 574-8691, Japan TEL: +81-72-871-1331 (main) / +81-72-871-7871 (sales) / +81-72-871-1341 (sales) FAX: +81-72-870-1865 Tokyo Office Pier City Shibaura Building 3F, 3-18-1 Kaigan, Minato-ku, Tokyo 108-0022, Japan TEL: +81-3-4212-6315 FAX: +81-3-4212-8880 Kitakyushu Office Kokura Kosan KMM Building Annex #416, 2-11-15 Asano, Kokurakita-ku, Kitakyushu-shi, Fukuoka 802-0001, Japan TEL: +81-93-531-5481 FAX: +81-93-521-4993 Sales and Service Offices Company Overview Trade Name: Nakakita Seisakusho Co., Ltd. Foundation: May 28, 1930 Representative Director: Teruhisa Miyata Business: Manufacturing and sales of automatic control valves, butter y valves, and remote control devices ●Click here to check our overseas distributors or contact us for more information. Inquiry Form on Our Website
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