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Fully welded, trunnion mounted ball valve
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Design features

 

  • Tightness is achieved by pressing the seats against the ball

  • Seat Design DN 2”...4”
  • Seat Design DN 6”...8”
  • Seat design for gaseous media, DN ≥ 6”
  • Seat design for liquid media, DN ≥ 6”
  • Great shell integrity crucial for long –term, maintenance-free service
  • Lower torque values and greater reliability due to trunnion mounted ball design
  • Spring loaded seats ensuring zero leakage even with low line pressure.
  • Self adjustable seat O-rings featuring reduced wear-off and extended durability
  • 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 (liquid
  • media).
  • 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 area
  • 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.
 


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