Shell material pressure – temperature rating according to the provisions of GB9131.
Structure and length limit deviations according valve GB / T 15188.2 requirements
Flange sealing surface type and size have special requirements specified in the order.
Stem and stem nut with trapezoidal thread, the provisions of its basic dimensions and tolerances according to GB 5796.1 ~ 5796.4 in.
Connection size bracket and drive device according to GB 12222 requirements.
WCB valve body materials, according to the provisions of GB12229.
Executive Standard Knife Gate What
Shutter austenitic stainless steel (SS304) material, according to GB 12220, the provisions of GB4237.
The stem material 1Cr13,2Cr13, according to the provisions of GB12220.
Bracket and packing gland using carbon steel (WCB) material, according to the provisions of GB12229.
Stem nut made of copper alloy (ZCuZn38Mn2Pb2, ZCuSn5Pb5Zn5), according to the provisions of GB 12225.
The seal member (packing) graphite asbestos rope.
Shell test and seal test according to GB / T 13927 in the provisions.
Performance requirements for effective sealing, seal leakage test is calculated as 1 × mm / s.
Clean gas valve required by the provisions of JB / T 7748’s.
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Paint color according to the provisions of JB 106.
Gas valve packing, storage, transport and quality assurance provisions according to JB / T 7928’s.
Casing pressure: 1.5MPa, sealing pressure: 1.1 Pressure, Temperature: 425 ℃, applicable medium: water, gas, pulp and the like.