Malleable Iron 331 Flat Seat Union M/F BSPT Thread

Size: 1/2”-6”
Material: BS EN 1562,EN-GJMB-350-10,KTH350-10
Dimension: BS EN 10242
Thread: ISO 7-1,BS 21,BSPT
Pressure Rating: PN16/PN25
Surface Treatment:Hot-dip Galvanized,Electro Galvanized,Black
Certificate: UL Listed / FM Approved / NSF 61
Application: Fire Protection,Waterworks,HVAC,Plumbing,GAS,Irrigation,or other piping systems

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Product Description

Products Details

Malleable Iron 331 Flat Seat Union M/F. Flat seat union M/F is a special way of connecting pipe fittings, it is a flat seat union with one end of internal threaded and the other end is external threaded.


Size L(mm) PCS/CTN.
1/2″ 64 140
3/4″ 70 120
1″ 78 80
1-1/4″ 88 40
1-1/2″ 93 32
2″ 104 20

The parts of Flat Seat Union M/F :

The connection method of Malleable Iron 331 Flat Seat Union M/F includes internal threaded pipe fittings and external threaded pipe fittings, gaskets, bolts and other components. The union have internal and external threads respectively and can be connected to pipes or other fittings. Gaskets are placed between two fittings to seal the connection and prevent fluid leakage. The bolt passes through the gasket and is fixed on the two pipe fittings, pressing the gasket tightly between the two pipe fittings to achieve a sealing effect.

The advantage of Flat Seat Union M/F

1. High-strength connection: The inner and outer wire flat seats are connected using inner and outer wire pipe fittings. Through the tightening effect of bolts, a high-strength connection effect can be achieved, which is suitable for harsh working conditions such as high pressure and high temperature.
2. Excellent sealing performance: The gasket is tightly pressed between the two pipe fittings, which can effectively prevent fluid leakage and has good sealing performance.
3. Easy installation: The connection method of the inner and outer wire flat seats is simple. You only need to place the gasket between the two pipe fittings and then fix it with bolts. The installation is quick and easy.
4. Wide range of applications: The inner and outer wire flat seat oil is suitable for various pipes, valves and other occasions that require sealed connections, and is widely used in petroleum, chemical industry, pharmaceutical and other fields.