Technical requirements for metal sealing ball valve
1 Pressure - temperature rating
    Ball pressure - temperature rating should not be rated higher than the shell pressure - temperature rating. In addition, seat, stem and body connections sealed
Department and other non-metallic parts affected by temperature, pressure limit valve - the temperature rating. Therefore, the valve of the pressure - temperature rating shall satisfy this
These non-metal parts temperature limits. Shell pressure - temperature rating in accordance with GB / T 12224 requirements.
2 Structure Length
    The structure of the length of ball size by GB / T 12221 or by ordering the provisions of the contract requirements.
3 connectors
3.1 flat, convex flange according to GB / T 9113.1 of the regulations, or orders the contract requirements.
3.2 male and female face flange by GB / T 9113.2 of the regulations, or orders the contract requirements.
3.3 by tongue and groove face flange GB / T 9113.3 of the regulations, or orders the contract requirements.
3.4 Ring Connection flange according to GB / T 9113.4 of the regulations, or orders the contract requirements.
3.5 flange sealing surface of the surface roughness according to GB / T 9124 requirements.
3.6 welded connectors by GB / T 12224 requirements, or by ordering the contract requirements.
3.7 Socket weld end connections according to the provisions of the relevant standard, or order the contract requirements.
3.8 End of thread within the thread connection according to GB / T 7306 requirement, or order the contract requirements.