Cryogenic butterfly valve refers to the butterfly valve that can be used under cryogenic temperature conditions.
1. Valve Size : 2” ~ 42”
2. Applicable Rating : ASME 150# ~ 900#
3. Temperature : Down to -196 ℃
4. Code & Standard : API, BS, ASME, ASTM
Designed by BS6364, ASME B16.34, and ASME VIII
5. Shell & Seat Leak Test : ISO15848, API622, API598, API6D,BS6364
6. Constructions：
End Connection : Butt-Welded or Flanged Type
Long Extended Bonnet
Fire Safety Construction
Manual or Motor Operated (Pneumatic, Electric, or Hydraulic)
1.Reinforced stainless steel shaft bearings for highly cycles and smooth operation at very cryogenic temperature.
2.High reliability: Safety integrity level requirements according to IEC 61508.
3.Triple offset disc rotation: provides bubble tight sealing without rubbing or galling.
4.Internal blow-out protection for prevents the shaft from blowing out under pressure.
5.Inherent fire safe function: stainless steel construction and metal seal provide inherent fire safe function.
6.The operating torque is small, the valve seat is easy to replace, and there is no need to set a limit structure.
| PARTS NAME | MATERIAL |
| BODY | Cast Steel – ASTM A351-CF8(M)/CF3(M) |
| BONNET | Cast Steel – ASTM A351-CF8(M)/CF3(M) |
| STEM | ASTM A182-316 / Gr.660 |
| DISK | ASTM A351-CF8/A182 F316 |
| EXTENDED BONNET | ASTM A351-CF3M)/ 316(L) |
| GASKET | SPIRAL WOUND GRAPHITE |
| GLAND PACKING | GRAPHITE |
All metal parts are subjected to more than two deep cold treatments before finishing;
All extended valve stems (except check valves) are made of high-performance XM-19 or Inconel718 alloy materials;
All spheres are hardened and precision ground, with a surface accuracy of more than 0.2um;
All lip-seal seals are from international first-line brands;
All sealing surfaces that match the lip-seal are polished with precision technology to achieve a surface accuracy of more than 0.2um;
All "TEJI" brand cryogenic valves are tested for normal temperature and low temperature performance according to international industry standards before leaving the factory, and are shipped only after they pass the test;
All seals of the extended stem packing parts adopt a unique combined structure, which can not only ensure long-term sealing performance, but also reduce the switching torque;
All valves below -101℃ (except check valves) are equipped with cooling plates to effectively ensure that the temperature at the bottom of the packing is above 0℃; at the same time, it can effectively prevent condensed water from freezing on the valve body.
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