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
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