+
  • 国标法兰截止阀1.jpg
  • 国标法兰截止阀2.jpg

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.

Key words:

Classification:

Stainless steel 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.

◆ Product use

National standard flange stop valve is suitable for nominal pressure PN1.6 ~ 2.5MPa, working temperature -29-550 ℃ 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, sealing surface surfacing Co-based hard alloy, corrosion resistance, good anti-injury 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. The material and flange size of the parts can be reasonably selected according to the actual working conditions or user requirements to meet the needs of various projects.



◆Main technical parameters

Design Criteria GB/T12235
Pressure-Temperature Rating GB/T12224
Structure length GB/T12221
Flange connection size JB/T 79、GB/T9113、HG/T20592
Welding end connection GB/T12224
Inspection and test JB/T9092、GB/T13927、GB/T26480
Nominal pressure (MPa) PN1.6 PN2.5 PN4.0
Shell test 1.5 2.4 3.75
High pressure seal test 1.1 1.76 2.75
Test pressure (MPa)
Low pressure gas seal test
0.6 0.6 0.6
Upper seal test 0.6 0.6 0.6
Applicable temperature -29 ℃ ~ 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 Material Part Name Material
Valve body CF8/CF8M Packing Graphite
Disc 304, 316 Pin shaft 304
Disc Nut 304, 316 Packing gland CF8/CF8M
Stop washer 304, 316 Swing bolt A193 B8、B8M
Stem 304, 316 Nut A1948、8M
Middle flange gasket 304/316 Graphite Bolt A193 B8、B8M
Bonnet CF8/CF8M Handwheel KTH300-06

 

◆ 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/T 9113-2010, and the structure length is in accordance with GB/T 12221-2005.

Product inquiry