Applicable Range of Valve Seat Material Butterfly Valve Standard Specifications List List of Drive Unit Specifications ◎：Optimal ＞ ○：Usable ＞ △：Usable under certain conditions ＞ ×：Not usable ／ ―：Not applicable Seat material Valve Type Drive unit Handle type Yoke bar type Low pressure type, medium pressure type,high pressure type Low pressure type, medium pressure type Fork lever Double cylinder Single cylinder Multi-turn Double cylinder Single cylinder Single-acting Single-acting Part-turn ER type SRJ type EM type TA2 type A900 type TA2 type A900 type Lever type Worm wheel type DRY SPACE DRY SPACE ON DECK DRY SPACE IN TANK DRY SPACE ON DECK DRY SPACE ON DECK IN TANK DRY SPACE ON DECK DRY SPACE DRY SPACE ON DECK DRY SPACE DRY SPACE ON DECK Type E Type B Type F IP66 IP68 IP68 Manual Hydraulic Electric Pneumatic Type Location Protection class Nominal size Design pressure Design temperature Allowable pipe ow velocity (liquid) Pressurization direction ( ow direction) Actuator Major uses NBR FKM EPDM PTFE Stainless steel Copper alloy Concentric type 50A to 800A 80A to 800A 65A to 800A 80A to 800A 80A to 800A 80A to 400A 200A to 400A 0 to 70°C 0 to 90°C 0 to 150°C –50 to +300°C 0 to 90°C –50 to +80°C –196 to +80°C 4m/sec 6m/sec 6m/sec 6m/sec Both directions Both directions Both directions Single directions Ballast fuel oil Insulation type Pneumatic Both directions (to the valve stem side is better) (to the valve stem side is better) (to the valve stem side) IC type (rubber seat) DR type (rubber seat) DT type (PTFE seat) DM type (metal seat) DD type (damper) DTP type (dual seat) DM400 type (metal seat) Manual Hydraulic Electric motor Pneumatic Manual Hydraulic Petroleum products Product chemicals Fire extinguishing, steam Discharge valve LPG LNG Double eccentric type Low temperature speci c type 1.0MPa 1.6MPa 1.0MPa 0 to 70 °C 0 to 90 °C 0 to 130 °C –50 to +150 °C –253 to +423 °C –196 to +100 °C Applicable temperature Fluid High flow velocity type available Freshwater Seawater Crude oil Heavy oil Diesel oil Kerosene Naphtha Gasoline Steam Fuel oil LPG LNG ◎ ◎ ◎ ◎ ○ ― ◎ ◎ ― ◎ ○ ○ ◎ ◎ × ○ △ ― ◎ ◎ × ○ ○ ― ◎ ◎ × ◎ ○ ― ◎ ◎ × ◎ ○ ― ◎ ◎ × ◎ ○ ― × ◎ × ◎ ○ ― △ △ ― ◎ ◎ ○ ◎ ◎ × ○ ○ ○ × × × ◎ ◎ ― × × × ○ ◎ ◎ Top handle type ■Electric Actuator ■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. ■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. •Remote operation is possible. •High-pressure operation allows for a smaller cylinder section. •Can be installed anywhere on board, including submerged environments. •A mechanical lock prevents the valve from opening from its fully closed position under uid pressure. •Drive unit powered by an electric motor in the unit. •Remote operation is possible. •A limit switch/torque switch is provided as standard. •Protection class: Capable of meeting IP68 (immersion conditions: 8 m × 72 hours). •Self-locking is possible, and the valve does not open under uid pressure 6 NAKAKITA VRCS PRODUCT CATALOG
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