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J41H Cast steel globe valve

Update: 2016/12/2??????View:
  • Brand: ???GK
  • Type: ???J41H-25C DN50
  • Order Online
Introduction

The opening and closing component of J41H cast steel globe valve is a cylindrical valve disc with a flat or conical sealing surface. The valve disc moves linearly along the centerline of the fluid. The national standard globe valve is only suitable for fully open and fully closed, and is generally not used to regulate flow. When customized, it is allowed to be adjusted and throttled. Suitable for cutting off or connecting media on pipelines in various working conditions such as petroleum, chemical, pharmaceutical, fertilizer, and power industries with a nominal pressure of PN1.6~16.0Mpa and a working temperature of -29~550 ℃. Applicable media include water, oil, steam, acidic media, etc. The operation modes include manual, gear transmission, electric, pneumatic, etc.

Working principle of J41H cast steel globe valve
J41H cast steel globe valve belongs to the forced sealing type valve. When the valve is closed, pressure is applied to the valve disc to force the sealing surface not to leak. When the medium enters the valve from below the valve disc, the resistance that the operating force needs to overcome is the frictional force between the valve stem and the packing, as well as the thrust generated by the pressure of the medium. The force required to close the valve is greater than the force required to open it, so the diameter of the valve stem should be larger, otherwise the valve stem bending fault may occur. In recent years, with the emergence of self sealing valves, the flow of medium in shut-off valves has shifted from above the valve disc into the valve chamber. Under the pressure of the medium, the force required to close the valve is small, while the force required to open the valve is large, resulting in a corresponding reduction in the diameter of the valve stem. Meanwhile, under the influence of the medium, this type of valve is also relatively tight. The flow direction of the shut-off valve shall be from top to bottom.

Main component materials and performance parameters of J41H cast steel globe valve

Body/Cover/Plate Stem Sealing Gasket Filler Temperature℃ Medium
WCB 2Cr13 13Cr ST  1Crl3/Flexible graphite 
0Cr18Ni9Ti OCr18Ni12Mo2Ti
Flexible graphite
SFB-260 SFP-260
≤425 Water, steam, oil products
WC1 38CrMoAI 25Cr2MoV ≤450
WC6 ≤540
WC9 ≤570
ZGCr5Mo ≤540
ZG1Cr18Ni9Ti 1Cr18Ni9Ti ≤200 Nitric acid
ZGCr18Ni12Mo2Ti 1C18Ni12Mo2Ti ≤200 Acetic acid

Main appearance and connection dimensions of J41H cast steel globe valve

J41H鑄鋼截止閥結(jié)構(gòu)圖

1.6MPa DN L D D1 D2 b n-Φd H D0
RF
J41H J41Y
J41W J41F
J41N  
16C 16P
16R 16I
10 130 90 60 40 14 4-Φ14 198 120
15 130 95 65 45 14 4-Φ14 218 120
20 150 105 75 55 14 4-Φ14 258 140
25 160 115 85 65 14 4-Φ14 275 140
32 180 135 100 78 16 4-Φ18 280 160
40 200 145 110 85 16 4-Φ18 330 180
50 230 160 125 100 16 4-Φ18 350 200
65 290 180 145 120 18 4-Φ18 370 280
80 310 195 160 135 20 8-Φ18 400 280
100 350 215 180 155 20 8-Φ18 415 320
125 400 245 210 185 22 8-Φ18 460 360
150 480 280 240 210 24 8-Φ23 510 450
200 600 335 295 265 26 12-Φ23 710 500
250 650 405 335 320 30 12-Φ25 786 550
300 750 460 410 375 30 12-Φ25 925 600
2.5MPa DN L D D1 D2 b n-Φd H D0
RF
J41H J41Y
J41W J41F
J41N  25C
25P 25R 25I
10 130 90 60 40 16 4-Φ14 198 120
15 130 95 65 45 16 4-Φ14 218 120
20 150 105 75 55 16 4-Φ14 258 140
25 160 115 85 65 16 4-Φ14 275 140
32 180 135 100 78 18 4-Φ18 280 160
40 200 145 110 85 18 4-Φ18 330 180
50 230 160 125 100 20 4-Φ18 350 200
65 290 180 145 125 22 8-Φ18 400 280
80 310 195 160 135 22 8-Φ18 355 280
100 350 230 190 160 24 8-Φ23 415 320
125 400 270 220 188 28 8-Φ25 460 360
150 480 300 250 218 30 8-Φ25 510 450
200 600 360 310 278 34 12-Φ25 710 500
250 622 425 370 332 36 12-Φ30 786 550
300 698 485 430 390 40 16-Φ30 925 600

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