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| Pneumatic Emergency Cut-off Valves |
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Product Overview
ZJHN pneumatic double-seater diaphragm control valve adopts dual guide structure. It is compact in structure, light in weight, active in operation, large in capacity, accurate in flow and convenient in detachment. It is widely used in accurately controlling set values of parameters of pressure, flow velocity, temperature, liquid level of gas, liquid and steam.
There are several kinds of this series, standard type, bellows seal type and socket heat insulation type. Pressure grades are PN16, 40, 64. Valve body diameters are DN25 to 400. Applicable fluids’ temperature range is -250℃ to +560℃. Leakage grades are Ⅲ and Ⅳ. Flow characteristics are linear and percentage. Kinds of types can be chosen from.
Main Part Materials Part Names
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Material
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Temperature Range
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Back Cover
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HT200
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-20~200℃
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ZG230-450
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-40~450℃
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ZG1Cr18Ni9Ti
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-250~550℃
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ZG0Cr18Ni12Mo2Ti
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-250~550℃
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Disc, Seat
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1Cr18Ni9
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-250~550℃
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0Cr18Ni12Mo2Ti
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-250~550℃
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Filler
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PTFE
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-40~200℃
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Diaphragm
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Nitrile Rubber Reinforced Dacron
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Compression Spring
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60Si2Mn
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Diaphragm Cover
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A3
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Specifications
DN (mm)
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25
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32
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40
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50
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65
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80
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100
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125
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150
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200
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250
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300
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400
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Rated Flow Coefficient (kv)
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10
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16
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25
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40
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63
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100
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250
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250
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400
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630
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100
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1600
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2700
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PN (MPa)
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1.6 4.0 6.4
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Travel (mm)
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16
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25
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40
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63
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100
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Medium Temperature (℃)
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-40~230℃(Normal Temperature),Radiator Type 230~450℃(Medium Temperature),Special type -100~600℃
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Flow Characteristics
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Linear, Equal Percentage
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Flange Standard
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In conformity with JB78-59, JB79-59; can also be made to JB/79.1-94, JB/79.2-94, ANSI, JIS, DIN...
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Body Material
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PN
(MPa)
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1.6
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WCB(ZG230-450) CF3CF8 CF8M
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4.0,6.0
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WCB(ZG230-450)、ZG1Cr18Ni9Ti、ZG0Cr18Ni12Mo2Ti CF8 CF8M
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Disc Material
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1Cr18Ni9、0Cr18Ni12Mo2Ti CF8 CF8M
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Back Cover Type
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Normal Type (Normal Temperature), Heat Type (Medium Temperature)
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Adjustable Ratio
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30:1
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Air Supply Adapter
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M16×1.5
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Note: ANSI, JPI and JIS flange valves are available according to users’ requirements.
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Type
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ZHA(B)-1
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ZHA(B)-2
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ZHA(B)-3
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ZHA(B)-4
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ZHA(B)-5
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ZHA(B)-6
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Working Area (cm2)
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200
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280
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400
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630
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1000
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1600
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Travel (mm)
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10
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16
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25
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40
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60
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1000
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Spring Range (KPa)
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20~100(Standard);20~100、40~200、20~60、60~100、80~240
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Main Technical Parameters
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Spring Pressure
(KPa)
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DN
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25
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32
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40
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50
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65
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80
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100
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125
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150
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200
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250
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300
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0.14
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20-100
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5.4
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4.4
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4.9
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3.8
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4.7
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3.6
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2.8
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3.75
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2.7
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2.15
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2.0
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1.7
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0.24
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40-200
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10.8
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8.8
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9.8
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7.6
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9.4
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7.2
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5.6
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7.5
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5.4
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4.3
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4.0
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3.4
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Note: The using condition is when medium outlet is closed and P2=0.
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External Diameters
DN (mm)
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25
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32
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40
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50
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65
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80
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100
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125
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150
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200
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250
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300
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L
(mm)
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PN1.6MPa
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185
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200
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220
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250
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275
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300
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350
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410
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450
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550
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670
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770
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PN4.0MPa
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190
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210
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230
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255
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285
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310
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335
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425
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460
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560
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740
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805
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PN6.4MPa
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200
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210
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235
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265
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295
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320
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370
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440
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475
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570
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750
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820
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H
(mm)
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Normal Type
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567
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570
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645
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650
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877
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887
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899
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1058
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1068
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1110
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1498
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1574
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Radiator Type
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697
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700
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775
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780
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1040
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1050
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1062
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1257
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1267
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1309
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1743
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1819
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H1(mm)
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117
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120
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139
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144
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188
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208
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220
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268
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278
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320
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441
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503
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D(mm)
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225
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360
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470
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620
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Weight (KG)
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33
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35
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47
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51
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98
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111
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148
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236
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292
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433
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760
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920
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Ordering Instructions:
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1. If there are special requirements, the customers should indicate in the contract of the following:
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a. length of structure
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b. connection type
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c. DN, full size, drawing down, pipe size
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d. flowing medium and temperature, pressure range
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e. standard and other requirements on testing and inspection
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2. We can equip different driving devices according to customer’s special need.
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3. If the customer supplies specific valve types and models, the customer should describe the exact meaning and requirements of the type, and signed the contract with supplier on a common understanding.
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售后服务:
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2、产品在使用中我厂定期组织技术、质检人员进行访问,征询用户对产品质量、使用状况、改进意见等方面的反馈,
以便进一步提高产品质量。
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