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Marine Cast Steel Steam Pressure Reducing Valve GB/T1852-1993

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China Marine Cast Steel Steam Pressure Reducing Valve GB/T1852-1993:

Marine Cast Steel Steam Pressure Reducing Valveis used in the marine steam pipe system with the temperature not over 300 degree centigrade.

Design Standard: GB/T1852-1993

Flange Size as per GB569 or GB2501

Test Standard: GB600

Main Parts & Material:

Body-Cast Steel (ZG230-450)

Bonnet-Cast Steel (ZG230-450)

Diaphragm-Bronze (QSn6.5-0.1)

Main Valve Spring-Chrome-Vanadium Spring Steel Wire (50CrVA)

Auxiliary Valve Spring-Chrome-Vanadium Spring Steel Wire (50CrVA)

Regulating Spring-silico-manganese spring steel wire

Specification:

Nominal Diameter(mm) Inlet DN1 20 25 32 40 50 65 80 100 125 150
Outlet DN2 25 32 40 50 65 80 100 125 150 200
Steam Pressure (Mpa) Inlet Pressure P1 0.4~2.5
Outlet Pressure P2 0.2~0.6
0.6~1.2

*The pressure difference between the inlet and the outlet can not be less than 0.2Mpa.

Main Size List(mm):

Flange size as per GB569

Nominal Diameter Dimension Body Thickness Flange Size Weight
PN2.5 Mpa Inlet PN1.6 Mpa Outlet
DN1 DN2 L H h D1 D2 D3 d1 n1 Th1 b1 D4 D5 D6 d2 n2 Th2 b2 kgs
20 25 170 250 75 6 95 68 48 13 4 M12 11 105 73 56 13 4 M12 12 15
25 32 105 73 56 12 115 83 64 15 6 M14 13 16
32 40 200 260 80 7 115 83 64 15 6 M14 13 125 93 74 21
40 50 210 270 85 125 93 74 135 103 84 23
50 65 240 290 115 135 103 84 170 132 110 17 8 M16 15 24
65 80 300 170 132 110 17 8 M16 15 185 147 126 16 40
80 100 280 320 120 8 185 147 126 16 205 167 146 10 43
100 125 330 350 150 9 205 167 146 10 225 187 168 72
125 150 380 360 190 11 240 196 172 21 M20 19 255 217 196 12 20 90
150 200 470 425 225 13 270 226 200 12 20 325 281 254 21 M20 120

Flange size as per GB2501

Nominal Diameter Dimension Body Thickness Flange Size Weight
PN2.5 Mpa Inlet PN1.6 Mpa Outlet
DN1 DN2 L H h D1 D2 D3 d1 n1 Th1 b1 D4 D5 D6 d2 n2 Th2 b2 kgs
20 25 170 250 75 6 105 75 58 14 4 M12 16 115 85 68 14 4 M12 16 16
25 32 115 85 68 140 100 78 18 M16 18 17
32 40 200 260 80 7 140 100 78 18 M16 18 150 110 88 22
40 50 210 270 85 150 110 88 165 125 102 24
50 65 240 290 115 165 125 102 20 185 145 122 20 26
65 80 300 185 145 122 8 22 200 160 133 8 42
80 100 280 320 120 8 200 160 133 24 220 180 158 22 46
100 125 330 350 150 9 235 190 158 22 M20 250 210 184 74
125 150 380 360 190 11 270 220 184 26 M24 26 285 240 212 22 M20 24 96
150 200 470 425 225 13 300 250 212 340 295 268 12 127

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