General:
The type 77/78-36100 Pneumatic Shut-off ball valve is composed of ball valves and pneumatic single or double action actuator. Valve size ranging from DN15 to DN200 are float ball valve, while DN250 and DN300 are fixed ball valve. Double seats use a unique flexible lip to seal against the ball and provide long lasting shut-off in either direction. The actuator is the product of Bellofram in USA and it also use the rack-pinion and double pistons construction. So the actuator have the features of small volume, light weight, large output, and so on. With the low-friction-factor guiding ring of nonmettle material, just avoid piston to body direct contact, which bring the actuator swift action and long using life. Type 77/78-36100 pneumatic shut-off ball valve as a whole have the features of simple construction, small volume, light weight, reliable sealing, long lasting, easy operation, etc. Therefore it can be widely apply to automatic control system and remote control system of petroleum-chemical industry, light industry, and some other industries.