Products Introduction
The valves which operated below -40℃ usually callcryogenic valves. It mainly used in ethylene, liquefied natural gas plants,natural gas LPG, LNG storage tanks, receiving bases and satellite stations,empty Sub-equipment, petrochemical tail gas separation equipment, liquidoxygen, liquid hydrogen, liquid nitrogen, liquid argon, carbon dioxide lowtemperature storage tank and tank truck, pressure swing adsorption oxygensystem.
Design specification
Design& Manufacture: API 600;API 602; BS 6364;ASME B16.34;MESC SPE 77/200;MSS SP-134; JB/T 12626
End to End: ASMEB16.10;GB/T 12221
Connection: ASME B16.5;ASME B16.25;HG;GB;JB;JIS;EN;DIN
Inspection & Test : API 598/BS 6364;MESC SPE 77/200;MSS SP-134;JB/T 12622
Product Features
Valve components parts that contacted with themedia before deep process must be strict cryogenic treatment according to therequirements of the specifications, to ensure valve parts can fully undertemperature change and cause inflation, contraction ,and the structure of seatpart will not have permanent deformation due to the temperature change
Using long neck bonnet structure that canprotect the stuffing box
No matter how the temperature change it canmaintain the disc reliable seal, expanding and flexible wedge available
Back seal seat cobalt chromium tungsten carbidesurfacing welding structure, to avoid the stainless steel material scuffing eachother
Cobalt chromium tungsten carbide overlayingwelding structure of the seat and gate sealing surfaces
Pressure relief hole structure design to preventvalve cavity abnormal pressure change, pressure relief hole can be positionedto seat or gate considering of valve structure , and connected with valve inletend
Stem surface nitriding hardening process, toprevent valve in the process of opening and closing surface scratches affectthe sealing performance
Packing chooses fugitive emission packing onrequest, ensuring valve packing place leakage to meet environment requirements
Welded nipples is available on request
Insulation board (drop water board)is availableon request
Main components parts combination
Body | Plate | seat | Stem |
A182 F304/F304L A351 CF3 A350 LF2;A352 LCB A350 LF3;A352 LCC A182 F316/F316L A351 CF3M | A182 F316/F304+HF | A182 F316/F304+HF | A182 F304 A182 F316 17-4PH UNS 20910 |
Note: Material isavailable upon request
Product Range
Nominal Diameter:1/2" ~48"(DN15~1200)
Pressure Range:ANSI/ASME150Lb~1500Lb(PN16~250Mpa)
Suitable Temperature:-196~150 ℃
Operation :Manual, Gear Box, Electric, Pneumatic