1,Pressure-temperature grade of the shell material is according to the provisions of GB9131.
2,The structural length and limit deviation of the valve body are specified in GB/T 15188.2.
3,Special requirements for flange connection size and sealing surface type are indicated in the order.
4,The valve stem and stem nut adopt trapezoidal thread, and its basic size and tolerance are according to the provisions of GB 5796.1～5796.4.
5,The connection size of the bracket and driving device is according to the provisions of GB 12222.
6,Valve body is made of WCB material according to GB12229.
7,Gate plate is made of austenitic stainless steel (SS304), according to the provisions of GB 12220, GB4237.
8,The valve stem is made of 1Cr13, 2Cr13, according to GB12220.
9,The bracket and packing gland are made of carbon steel (WCB), according to the provisions of GB12229.
10,Stem nut is made of copper alloy (ZCuZn38Mn2Pb2, ZCuSn5Pb5Zn5), according to the provisions of GB 12225.
11,The upper sealing member (packing) is made of graphite asbestos rope.
12,Shell test and sealing test according to the provisions of GB/T 13927.
13, the effective sealing performance requirements, sealing test leakage is calculated according to 1 × mm / s.
14,Gas gate valve cleaning requirements according to the provisions of JB/T 7748.
15, the color of paint according to the provisions of JB 106.
16,Packaging, storage, transportation and quality assurance of the gas gate valve according to the provisions of JB/T 7928.
17,Shell pressure: 1.5MPa, sealing pressure: 1.1 pressure, applicable temperature: 425 ℃, applicable media: sewage, gas, pulp and so on.
