Cryogenic metal seal butterfly Valve

A Cryogenic metal seal butterfly Valve is made to specifically withstand temperatures below freezing point in industrial applications. It is generally made from stainless steel and bronze. It also comes with an extended bonnet for protection against extreme temperatures.

Products Introduction

The series of valve uses three eccentric structure , when valve opened , the seat sealing surface separates from the body sealing surface , to avoid the relative friction between seals ,greatly increasing the service life of valve . when valve closed , valve stem provides the torque , to make between seals form enough seal special pressure and keep the reliable seal. Large stem diameter ca overcome seal bring advance reactions from pipeline vibration or pressure fluctuations , further improve the reliability of valve seal it’s known that three eccentric sealing principle belongs to a mandatory seal further turns stem , it will increase seal special pressure , and sealing ring in 360 circle special pressure distribution is even,won’t appear local special pressure too high leads to materials plastic deformation phenomenon.

Fuvalve design and manufacture cryogenic butterfly valve,body has two kinds of structure : flange connection , butt weld connection (with maintenance orifice),  with the body of the over haul orifice online service for trims , making maintenance work become usually simple, be helpful for the use of resources and save maintenance cost . This series of valve has good seal performance , high reliability , light weight , compact structure , and no need worry about the phenomenon of body cavity pressure abnormal increase , is the ideal valve of transporting cryogenic medium , which can be widely used in liquefied natural gas ( LNG ) , aerospace and other areas of low temperature condition.

Production Design Specification

Design & Manufacture：API 609； BS 6364；ASME B16.34；MESC SPE 77/200； MSS SP-134； JB/T 12623

End to End ： API 609
Flange 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

Anti0blow out stem design ,with live load and the adjustable packing seal structure

Three eccentric structure, have no the relative friction between seals, greatly prolongs the service life of valve

The body of the overhaul orifice can bring trim online service, lower down maintenance cost

Heightening bonnet structure, preventing the effect of low temperature medium by packing, avoiding stem not scratched

Lip-seal stem sealing ring provides a primary seal with fugitive emission graphite packing design

Height adjustable drip board structure, to make the cold insulation space is not restricted

Low leakage is available upon request, detail technical requirements please refer to the low leakage sample

Main Components Parts Combination

Note: Material can be optional upon request

Products Range

Nominal Size：4″~40″(DN100~1000)

Pressure Rating：ANSI/ASME150Lb~900Lb(PN16~150MPa)

Appliable Temperature：-196~-150 ℃

Operation：Manual ,Gear ,Electric, Pneumatic