Two-piece trunnion mounted ball valve
Design features
- Tightness is achieved by pressing the seats against the ball
- Easy maintenance, repair and trim accessibility due to split body design.
- Lower torque values and greater reliability due to trunnion mounted ball design.
- Spring loaded seats ensuring zero leakage even with low line pressure.
- Guaranteed tightness provided by the dual sealing technology : primary - metal to metal, secondary – polymer to metal.
- Pressure relief system which is engaged when the line working pressure exceeds the specified threshold.
- Block and bleed system meant for venting pressure from body cavity (DBB in closed or open/closed position).
- Sealant injection port enabling to restore valve tightness in the seats and stem areas.
- Anti blow-out stem with antistatic design.
Parts and materials:
|
Number
|
Part
|
Standard
|
Stainless Steel
|
Sour Service
|
Low Temperature Service
|
|
1
|
Body
|
ASTM A105
|
ASTM A351-CF8M
|
ASTM A105
|
ASTM A352-LCB
A350 LF2
|
|
2
|
Ball
|
ASTM A105/ENP
|
ASTM A182-F316
|
ASTM A105/ENP
|
ASTM A182-F216
A350 LF2 + ENP
|
|
3
|
Gland Flange
|
ASTM A105
|
ASTM A351-CF8M
|
ASTM A105
|
ASTM A216-WCB
|
|
4
|
Seat Ring
|
PTFE*
|
PTFE*
|
PTFE*
|
PTFE*
|
|
5
|
Stem
|
ASTM A182-F6a
|
ASTM A182-F316
|
ASTM A182-F6a
|
ASTM A182-F316
|
|
6
|
Gland
|
ASTM A276-420
|
ASTM A182-F316
|
ASTM A276-420
|
ASTM A182-F316
|
|
7
|
Packing Set
|
Rubber
|
Rubber
|
Rubber
|
Rubber
|
|
8
|
Thrust Washer
|
PTFE
|
PTFE
|
PTFE
|
PTFE
|
|
9
|
Bolt
|
ASTM A193-B7
|
ASTM A193-B8
|
ASTM A193-B7M
|
ASTM A320-L7M
|
|
10
|
Spring
|
S.S.
|
S.S.
|
S.S.
|
S.S.
|
|
