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GB flange globe 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:

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

National standard flange stop valve is suitable for nominal pressure PN1.6 ~ 16.0MPa, working temperature -46~550 ℃ of petroleum, chemical, pharmaceutical, fertilizer, power industry and other working conditions of the pipeline, cut off or connected to the pipeline medium.

◆Product features

1, the product structure is reasonable, reliable sealing, excellent performance, beautiful appearance;
2, the sealing surface surfacing Co-based hard alloy, wear resistance, corrosion resistance, anti-scratch performance, long service life;
3. The valve stem has good corrosion resistance and abrasion resistance after tempering and surface nitriding treatment;
4. The valve is equipped with an inverted sealing structure, which is reliable in sealing;
5. Parts material and flange size can be reasonably selected according to actual working conditions or user requirements to meet various engineering needs.



◆ Executive standards

Product Specification Design Specification Structure length Connecting flange TEST AND INSPECTION Pressure-Temperature
GB/T 12235 GB/T 12221 JB/T 79.1、GB/T9113HG/T20592 GB/T 26480GB/T13927 GB/T12224

 

◆ Main performance specifications

1. Test pressure

Nominal pressure PN(MPa) 1.6 2.5 4.0 6.4 10.0 16.0
Shell strength test 2.4 3.8 6.0 9.6 15 24
Upper seal test 1.8 2.8 4.4 7.0 11 18
Sealing test 1.8 2.8 4.4 7.0 11 18

2. Applicable medium and applicable temperature

Product Type Applicable media Applicable temperature ℃

J41HY-Type C

J941HY-Type C

Water, oil, steam ≤ 425

J41HY-Type P

J941HY-Type P

Nitric acid ≤200
J41HY-Type R Acetic acid ≤200

J41HY-Type I

J941HY-Type I

Water, oil, steam ≤ 550

 

◆ Main parts materials

Product Type Part Name
Body/Bonnet Stem Disc Sealing surface Stem Nut Packing Fasteners Handwheel

J41HY-Type C

J941HY-Type C

25/WCB Chrome stainless steel 2Cr1325 H: Stainless steel
Y: Cobalt base hard
Quality alloy steel

Copper alloy flexible graphite high quality carbon steel malleable cast iron

J41HY-Type P

J941HY-Type P

chromium-nickel steel chromium-nickel steel chromium-nickel steel chromium-nickel steel Copper alloy flexible graphite Stainless Steel malleable cast iron
J41HY-Type R chromium nickel molybdenum steel chromium nickel molybdenum steel chromium nickel molybdenum steel chromium nickel molybdenum steel Copper alloy flexible graphite Stainless Steel malleable cast iron

J41HY-Type I

J941HY-Type I

chromium molybdenum steel chromium molybdenum steel Alloy Steel cobalt base hard alloy steel Copper alloy flexible graphite Alloy Steel malleable cast iron

 

◆ Main outline connection dimension

Nominal pressure PN DN(mm) L D D1 D2 b  f    Z-Fd H D0
PN1.6MPa 50 230 165 125 102 18 3 4-F18 350 240
65 290 185 145 122 18 3 8-F18 355 280
80 310 200 160 138 20 3 8-F18 400 280
100 350 220 180 158 20 3 8-F18 415 320
125 400 250 210 188 22 3 8-F18 460 360
150 480 285 240 212 22 3 8-F22 510 400
200 600 340 295 268 24 3 12-F22 710 400
250 730 405 355 320 26 3 12-F26 789 450
300 850 460 410 378 28 4 12-F26 925 500
PN2.5MPa 50 230 165 125 102 20 3 4-F18 350 240
65 290 185 145 122 22 3 8-F18 400 280
80 310 200 160 138 24 3 8-F18 355 280
100 350 235 190 162 24 3 8-F22 415 320
125 400 270 220 188 26 3 8-F26 460 360
150 480 300 250 218 28 3 8-F26 510 400
200 600 360 310 278 30 3 12-F26 710 400
250 730 425 370 335 32 3 12-F30 789 450
300 850 485 430 395 34 4 16-F30 925 500

Note: The flange size in this table is in accordance with GB/T9113-2010, and the structure length is in accordance with GB/T 12221-2005.

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