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Memory seal ball valves utifizes unique memory seal seats with high seal performance, meet all requirements for oil and gas pipeline service to handle a vast variety of fluids, slurries, semi-solids and almost any corrosive medium.
Design features
Compensate automatically for wear and flutuations of pressure and temperature.
Stem bearing reduce side thrust
Long cycle life
Low torques
Live-loaded thrust washer prevents galling
Fire safety and antistatic devices
Full guided stem-no leakage
All ball valve can be equipped with electric, pneumatic, hydraulic or gear actuators.
Advantages
SEATS"IN-TENSION"
Greater strength
Less fatigue
Positive bi-directional shutoff
Commpensate for temperature fluctuations
Uniform torque
High cycle life
Eliminate cold flow effects
2. LARGER SEALING AREA
Superior sealing
3. SELF-RELIEVING SEATS
For self-relieving applications, we supply special self-relieving seats or drill a hole in the ball.
Design norm
Basic design ASME B 16.34 BS5351
Face to face ASME B 16.10 GB12221
Flange dimension ASME B 16.5 GB HG SH
Socket-weld ASME B 16.11
Screwed-weld ASME B 1.20. 1
Valve testing API598
Memory Seal Ball Valves