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GB floating ball valve

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.

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Classification:

Stainless steel valve series

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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.

◆ Product use

The national standard floating ball valve is mainly used to cut off or connect the medium in the pipeline, and can also be used for the regulation and control of the fluid, which can no longer be used for the use of the cut-off valve after adjustment. Choose different materials, can be applied to water, steam, oil, liquefied gas, natural gas, coal gas, nitric acid, acetic acid, urea and other media, but also suitable for poor working conditions such as oxygen, hydrogen peroxide, methane and ethylene. According to the working conditions, can be equipped with electric actuator Q941 electric ball valve and pneumatic actuator Q641 pneumatic ball valve.

◆Product features

1, the fluid resistance is small, the ball valve is a small fluid resistance in all valves, even if the ball valve, the fluid resistance is quite small.
2. The switch is quick and convenient. As long as the valve stem rotates 90 °, the ball valve completes the fully open or fully closed action, and it is easy to realize the rapid opening and closing.
3. Good sealing performance. Ball valve seat seals are generally made of elastic materials such as PTFE, which is easy to ensure sealing, and the sealing force of the ball valve increases with the increase of medium pressure.
4. The valve stem is sealed and reliable. Valve opening and closing of the valve stem only for rotation, so the valve stem packing seal is not easy to be destroyed, and the valve stem sealing force increases with the increase of medium pressure.
5. The ball valve channel is flat and smooth, not easy to deposit medium, and can pass the ball through the pipeline,



◆ Main performance specifications

Performance Specification Nominal pressure (MPa)
1.6 2.5 4.0 6.4 10.0
Test pressure
(MPa)
Strength test 2.4 3.75 6.0 9.6 15.0
Sealing test 1.76 2.75 4.4 7.04 11.0
Pneumatic test 0.6 MPa
Applicable temperature -196 ℃ ~ 550 ℃ (Note: Different materials shall be selected for different working conditions)
Applicable media Ordinary type Water, steam, petroleum, liquefied petroleum gas, natural gas, etc.
Sulfur-resistant type Natural gas, oil, etc. containing H₂ S, CO

 

◆ Executive standards

Design Specification GB/T 12237-2007
Structure length GB/T 12221-2005
Connecting flange JB/T 79-2015、GB/T 9113-2010
TEST AND INSPECTION GB/T 13927-2008
Pressure-Temperature GB/T 12224

 

◆ Material of main parts

Part Name Stainless Steel Series Low temperature steel series Sulfur resistant series
Stainless Steel Series
Valve body, bonnet CF8、CF8M、CF3、CF3M LCB、LCC CF8M
Valve seat PTFE, RPTFE, sintered carbon fiber, metal rubber components
Sphere F304、F316、F304L、F316L LF1、LF2、LF ENP F316
Spring INCONEL 750
Stud A193 B8、B8M A320L7 A193 B8M
Gasket Flexible graphite stainless steel
Nut A1948M A1944 A1948M
Stem A182F304、316、304L、316L A182F6a A182F316
Bushing Metal lined PTFE; Sintered carbon fiber
Packing pad A182 F6a
Packing Flexible graphite, PTFE
Packing gland CF8、CF8M CF8 CF8M
Screw A193 B8、B8M A320L7 A193 B8M
Positioning piece GB/T 700 Q235A Zn(Cr)
Retaining ring GB/T 1222 65Mn
Handle A216 WCB

 

◆ Main outline connection dimension

Nominal pressure PN Nominal diameter DN Q41F-16/25C
L D D1 D2 b Z-fd H W
PN1.6MPa 15 130 95 65 45 14 4-F14 78 130
20 140/130 105 75 55 14 4-F14 84 130
25 150/140 115 85 65 14 4-F14 95 160
32 165 135/140 100 78 16 4-F18 150 160
40 180/165 145/150 110 85 16 4-F18 150 180
50 200/203 160/165 125 100 16 4-F18 170 200
65 222/220 180/185 145 120 18 4-F18 195 240
80 250/241 195/200 160 135 20 8-F18 215 240
100 280/305 215/220 180 155 20 8-F18 250 280
125 320/356 245/250 210 185 22 8-F18 265 300
150 360/394 280/285 240 210 24 8-F23 270 300
200 400/457 335/340 295 265 26 12-F23 330 350
PN2.5MPa 15 130 95 65 45 16 4-F14 103 130
20 140/130 105 75 55 16 4-F14 112 130
25 150/140 115 85 65 16 4-F14 123 160
32 165 135/140 100 78 18 4-F18 150 160
40 180/165 145/150 110 85 18 4-F18 156 180
50 200/203 160/165 125 100 20 4-F18 172 200
65 222/220 180/185 145 120 22 8-F18 197 240
80 250/241 195/200 160 135 22 8-F18 222 240
100 280/305 230/235 190 160 24 8-F23 253 280
125 320/356 270 220 188 28 8-F25 275 300
150 360/394 300 250 218 30 8-F25 286 300
200 400/457 360 310 278 34 12-F25 360 350

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