Gas/Hydraulic Valve Operators and Control Systems
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Basic Features
Scotch yoke design for high breakaway torque
Modular construction with six basic drive cases; cylinder trim to provide breakaway torque ratings from 5,000 lb.in [565 N.m] or less to 6,000,000 lb.in [678,000 N.m]
Standard light weight cast aluminum drive cases are ideal for arctic or tropical temperature and normal or sour environmental conditions. Optional ductile iron or cast steel drive cases are available for special applications. Quad Series 12Q and Series 12 operators have steel fabricated drive cases
Readily adaptable to all quarter-turn valves, 90°+-10° adjustable rotation standard, limited rotation available
Replaceable top and bottom yoke bearings
Piston with non-metallic wear ring to prevent piston/cylinder scuffing
Adaptable to “NACE” trim valves (MR-01-75); suitable for operation with sour power gas on application
Zero leakage piston and rod seals; material to suit application
Integral drive rod deflection stabilizers to absorb side loads
Suitable for 1480 psig (102 barg) maximum working pressure for Series 2, 3 and 6; higher pressure on application
Suitable for 1450 psig (100 barg) maximum working pressure for Series 7 and 12; higher pressure on application
Complete control packages featuring rugged Bettis poppet style relays to suit specific application
Full pressure control packages available for use where specifications disallow regulators
Manual pump for emergency operation
Manifold controls are fully enclosed and weather protected by lockable cover
Gas/Hydraulic control system provides smooth power transmission
Torque limiting devices available
Visual valve position indication
Convert pipeline gas pressure into a powerful hydraulically controlled torque to open and close the valve
Readily adaptable for fail safe operation
Gas/Hydraulic and volume tanks are designed and constructed in our ASME certified facility to Section VIII DIV. 1, and CSA B51 OR ASME certification and local regulatory approval can be provided
Petroleum hydraulic fluid is standard in Bettis gas/hydraulic systems (e.g. Esso Univis J13 or N22, Aeroshell Fluid 4); see page 26 for specifications. Other fluids, including biodegradable, available on request