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  • 三片式外螺纹球阀(带焊管)1.jpg
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Three-piece external thread ball valve (with welded pipe)

A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category.

Key words:

Classification:

Screw thread valve series

Product Consulting:

Description


A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category. The valve may be operated manually or with a hand wheel, handle or pedal, and may also be controlled to vary the pressure, temperature and flow rate of the fluid medium. The valve can perform continuous or repeated operations on these changes, such as safety valves installed in hot water systems or steam boilers. In more complex control systems, automatic control valves are used as required by external inputs (I. e., to adjust the changing set point of the flow through the pipeline). The automatic control valve does not need to be manually operated according to its input and setting, so that the valve can accurately control the various requirements of the fluid medium. Valves can also be divided into cast iron valves, cast steel valves, stainless steel valves, chromium molybdenum steel valves, chromium molybdenum vanadium steel valves, dual phase steel valves, plastic valves, non-standard customized valve materials, etc.

◆ Main performance specifications

Product specification: NPS1/4 "~ 2"
Nominal pressure: PN 1.0/1.6MPa
Applicable medium: water, air, oil, acid
Applicable temperature:-20~120 ℃
Thread standard: according to BSPT/BSP/NPT/DIN/JIS/RC/G
Structure length: GB/T 12221/ASMW B16.1
Design and manufacture: GB/T 12237/ANSI B16.34
Inspection and test: GB/T 13927/API 598






◆ Material of main components

Component Name Material
Valve body CF8M CF8
Bonnet CF8M CF8
Sphere SS316 SS304
Stem SS316 SS304
Valve seat RTFE
Stem seal PTFE
Middle Head Pad PTFE
Packing sleeve SS316/SS304
Handle SS202
Rubber sleeve PLASTIC
Nut A1948M/A1948
Bolt A193 B8M/A193 B8
Nozzle nut SS316/SS304
Takeover PTFE
nozzle gasket SS316/SS304
Nut A1948

 

◆ Main outline connection dimension

NPS L D D1 H E
1/4" 140 11.5 14 57 95
3/8" 160 12.5 18 57 95
1/2" 180 15 22 68 110
3/4" 200 20 28 70 125
1" 218 25 34 80 125
1-1/4" 235 32 42 85 135
1-1/2" 260 38 46 95 155
2" 300 50 60 105 155

 

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