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ADD:Hongqi River gully, Chongqing, China





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Forged steel low temperature stop valve

Forged steel low temperature stop valve

Forged Steel Valve
Forged steel cryogenic valves are available in two bonnet designs. The first type is a bolt-type valve cover. According to the valve of this design, the valve body and the valve cover are connected by bolts and nuts, and the wound type gasket (made of 316 clip flexible graphite). Metal rings can also be used when customers have special requirements. The second design form is a welded bonnet. According to this design, the valve body and the bonnet are screwed and fully welded. Solder-through connections are also available when the customer has special requirements.
Gate valves, globe valves, and ball valves can all be designed as cryogenic valves. In order to be used at a low temperature of -196 ° C (320 ° F), the valve is generally designed as an extended bonnet.
Cryogenic valve design structure and characteristics
The low temperature gate valve, globe valve and ball valve comply with API602. Inspection and testing according to API598, marking according to MSS-SP-25.
The following institutions are used:
Full diameter or reduced diameter
Self-centering pressure plate
Integral upper seal seat
Seat with pressure balance hole (for gate valve, ball valve)
The socket is in accordance with ASME B16.11
Bolted, wrap-around gasketed bonnet and threaded, fully welded sealed bonnet
Special extended length required by the customer
Soft seal shut-off valve required by customer
PTEE filler when requested by the customer
Special low temperature test requested by the customer
Lifting and ball type, stop check valves
Bright rod bracket type (OS£Y)
Related pressure: 800LB
Serial number Part Name AS to ASTM SS to ASTM
LF2 LF3 F304(L) F316(L)
1 Valve body A350LF2 A350LF3 A182F304(L) A182F316(L)
2 Seat A276420 A276410 A276304(L) A276316(L)
3 gate A350LF2 A350LF3 A182F304(L) A182F316(L)
4 Gasket 316夹柔性石墨 316夹PTFE
5 cap A350LF2 A350LF3 A182F304(L) A182F316(L)
6 bolt A193B7 A193B7 A193B8 A193B8M
7 Valve stem A182F6 A182F6 A182F304(L) A182F316(L)
8 filler Flexible graphite PTFE
9 Pin A276420 A276 304
10 Joint bolt A193B7 A193B16 A193B8 A193B8M
11 Packing sleeve A276410 A182F304(L) A182F316(L)
12 Packing plate A105 A182F11 A182F304(L) A182F316(L)
13 Nut A1942H A1944 A1948 A1948M
14 Stem nut A276420
15 Lubricating gasket A473431
16 Nameplate SS
17 Tightening nut A1942H A1944 A1948 A1948M
18 Hand wheel A197
proper temperature ≥—40℃ ≥—101℃ ≥—196℃
Note: Other materials required by the customer can also be used. The sealing surface material is matched with the customer specified internal code.
CS=carbon steel; AS=alloy steel; SS=stainless steel;
Size (MM)
NPS 3/8" 1/2" 3/4" 1" 11/4" 11/2" 2"
L 79 92 111 120 120 140 178
H(开) 330 333 360 407 475 475 551
W 100 100 125 160 160 180 200