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Cast steel 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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Cast 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 overview

Cast steel floating ball valve is mainly used to cut off or connect the medium in the pipeline, can also be used for fluid regulation and control, used to adjust the ball valve can no longer be used to cut off the use. 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 of the medium, 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, it is not easy to deposit medium, and the pipeline can pass the ball.



◆ Executive standards

Design Specification GB/T 12237-2007
Structure length GB/T12221-2005
Connecting flange JB/T 79-2015、GB/T 9113-2010
TEST AND INSPECTION JB/T9092、GB/T26480
Pressure-Temperature GB/T 12224

 

◆ 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


◆ Material of main parts

Part Name Carbon Steel Series Low temperature steel series Sulfur resistant series
Carbon Steel Series
Valve body, bonnet A216 WCB LCB、LCC GB/T12229 A216 WCB
Valve seat PTFE, RPTFE, sintered carbon fiber, metal rubber components, metal valve seat STL/Ni55
Sphere A105 HCr/ENP/STL/Ni60 LCB or ENP/STL/Ni60. A105 HCr/ENP/STL/Ni60
Spring 60Si2Mn/INCONEL 750
Stud A193 B7 A320L7 A193 B7M
Gasket Flexible graphite stainless steel
Nut A194 2H A1944 A1942HM
Stem A182 F6a A182F6a A182F304
Bushing Metal lined PTFE; Sintered carbon fiber
Packing pad A182F6a A182F6a A182F6a
Packing Flexible graphite, PTFE
Packing gland A216 WCB CF8 GB/T12229 A216 WCB
Screw A193 B7 A320L7 A193B7M
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(mm)

L W H D D1 D2 b  f   Z-d
Series 1 Series 2
PN1.6 MPa 32 165 165 160 85 140 100 78 18 2 4-F18
40 180 165 230 95 150 110 88 18 3 4-F18
50 200 203 230 107 165 125 102 18 3 4-F18
65 222 220 400 142 185 145 122 18 3 8-F18
80 250 241 400 152 200 160 138 20 3 8-F18
100 280 305 700 178 220 180 158 20 3 8-F18
125 320 356 1100 252 250 210 188 22 3 8-F18
150 360 394 1100 272 285 240 212 22 3 8-F22
200 400 457 1500 342 340 295 268 24 3 12-F22
250 533 533 495 405 355 320 26 3 12-F26
300 610 610 580 460 410 378 28 4 12-F26
PN2.5 MPa 32 165 165 160 85 140 100 78 18 2 4-F18
40 180 165 230 95 150 110 88 18 3 4-F18
50 200 203 230 107 165 125 102 20 3 4-F18
65 222 220 400 142 185 145 122 22 3 8-F18
80 250 241 400 152 200 160 138 24 3 8-F18
100 280 305 700 178 235 190 162 24 3 8-F22
125 320 356 1100 252 270 220 188 26 3 8-F26
150 360 394 1100 272 300 250 218 28 3 8-F26
200 400 457 1500 342 360 310 278 30 3 12-F26
250 533 533 495 425 370 335 32 3 12-F30
300 610 610 580 485 430 395 34 2 16-F30

Note: The flange size in this table is in accordance with ASME B16.5 standard, and the structure length is in accordance with ASME B16.10.

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