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GB Swing Check 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 swing check valve is suitable for pipelines with a pressure of PN1.6-42 MPa and a working temperature of -196 ℃ ~ 550 ℃ in various working conditions such as petroleum, chemical, pharmaceutical, fertilizer, and electric power industries to prevent the backflow of the medium.

◆Product features

1. The product has compact structure, reliable sealing, excellent performance and beautiful appearance;
2, the sealing surface surfacing Co-based hard alloy, wear resistance, corrosion resistance, anti-scratch performance is good, long service life;
3. The built-in pin shaft structure reduces the external leakage point and is reliable in use;
4. The material of the parts, the size of the flange and the butt welding end can be reasonably selected according to the actual working conditions or user requirements to meet various engineering needs.
 



◆ Executive standards

Design Criteria GB/T 12236
Pressure Temperature Rating GB/T 12224
Structure length Gb/t 12221 、 gb/t 15188.1
Flange type and size GB/T 9113、JB/T 79
Butt-weld end connection GB/T 12224
Inspection and test GB/T 26480、GB/T13927

 

◆ Main performance specifications

Nominal pressure (MPa) PN1.6 PN2.5 PN4.0 PN6.4
Test pressure
(MPa)
Shell test 2.4 3.75 6.0 9.6
High pressure seal 1.76 2.75 4.4 7.04
Low pressure seal 0.6
Applicable temperature -196 ℃ ~ 550 ℃ (different materials for different working conditions)
Applicable media Water, oil, steam and all kinds of corrosive media (different media use different materials)

 

◆ Main parts materials

Part Name Stainless Steel Alloy Steel low temperature steel
Valve body CF8、CF8M WC6 LCB
Disc CF8、CF8M WC6 LCB
Rocker CF8、CF8M WC6 LCB
Pin shaft 304, 316 304 410
Connecting frame CF8、CF8M WC6 LCB
Gasket Flexible Graphite SS304/316 Flexible Graphite SS304 Flexible Graphite SS304
Bonnet CF8、CF8M WC6 LCB
Stud B8、B8M 35CrMoA、A193B7 A320L7
Nut 8、8M 35CrMoA、A1942H A1947

 

◆ Main outline connection dimension

Nominal pressure PN DN(mm) L D D₁ D₂ b  f   Z-Fd H WT(kg)
PN1.6MPa 50 230 165 125 102 18 3 4-F18 135 21
65 290 185 145 122 18 3 8-F18 142 28
80 310 200 160 138 20 3 8-F18 165 38
100 350 220 180 158 20 3 8-F18 180 58
125 400 250 210 188 22 3 8-F18 210 92
150 480 285 240 212 22 3 8-F22 233 130
200 600 340 295 268 24 3 12-F22 304 210
250 730 405 355 320 26 3 12-F26 348 294
300 850 460 410 378 28 4 12-F26 390 367
350 980 520 470 438 30 4 16-F26 430 410
400 1100 580 525 490 32 4 16-F30 468 461
450 1200 640 585 550 40 4 20-F30 523 570
500 1250 715 650 610 44 4 20-F33 525 850
PN2.5MPa 50 230 165 125 102 20 3 4-F18 160 22
65 290 185 145 122 22 3 8-F18 175 29
80 310 200 160 138 24 3 8-F18 185 38
100 350 235 190 162 24 3 8-F22 220 61
125 400 270 220 188 26 3 8-F26 248 96
150 480 300 250 218 28 3 8-F26 276 132
200 600 360 310 278 30 3 12-F26 350 213
250 730 425 370 335 32 3 12-F30 410 297
300 850 485 430 395 34 4 16-F30 430 372
350 980 555 490 450 38 4 16-F33 518 415
400 1100 620 550 505 40 4 16-F36 560 480
450 1200 670 600 555 46 4 20-F36 582 610
500 1250 730 660 615 48 4 20-F36 618 920

Note: The flange size in this table is in accordance with GB/T9113 and EN1092 standards, and the structure length is in accordance with GB/T 12221 standards.

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