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Home> pneumatic valve >> ZMBNpneumatic diaphragm double-seat control valve
  • Product number:MC-000000004330
  • Product name:pneumatic diaphragm double-seat control valve
  • Product Type:ZMBN
  • Product nameplate:SAIC
  • Project Category:pneumatic valve >>
  • Manufacturer:Shanghai Automation Instrumentation Co., Ltd.
  • Sales unit: Shanghai Automation Instrumentation Marketing Center
  • Information download:Click to enter the download page  
  • Introduction
  • Specifications
Pneumatic diaphragm double-seat adjusting valve, is the general actuator of automatic regulation system. Simple structure, reliable action, convenient maintenance, widely used in chemical, petroleum, power, metallurgy for automatic adjustment and remote control
Structure principle
Made up of pneumatic diaphragm actuator and linear double-seat valve
Action principle: signal pressure from regulator, input into air room of pneumatic diaphragm actuator, drive putter to move, then move the valve spool, produce travel, change the flow contained area, regulated the flow of media. Features: two valve seats, large flow capacity, small balanced force, convenient action, widely used
Nominal diameter mm
20
25
40
50
65
80
100
150
200
250
300
350
400
Diameter of valve seat   mm
10
12
15
20
25
32
40
50
65
80
100
125
150
200
250
300
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Rated flow coefficient Kv
Straight line
1.8
2.8
4.4
6.9
11
17.6
27.5
44
69
110
176
275
440
690
1000
1600
Equal percentage
1.6
2.5
4
6.3
10
16
25
40
63
100
160
250
400
630
900
1440
Nominal pressure MPa
0.6   1.6   4.0   6.4
Travel  mm
10
16
25
40
60
100
 
 
Flow characteristics
Straight line、equal percentage、quick open
Media temperature℃
-15～200(normal temperature )、-40～+250、-40～+450(medium temperature )、-100～+200(low temperature )
Flange size
Cast iron flange size JB78、cast steel flange sizeJB79
Flange type
According to JB78-59、JB79-59标准，according to JB/79.1-94、JB/79.2-94、ANSI、JIS、DIN  standard
Material of valve body
PN
(MPa)
0.6,1.6
WCB(ZG230-450) CF3CF8 CF8M
4.0,6.4
WCB(ZG230-450)、ZG1Cr18Ni9Ti、ZG0Cr18Ni12Mo2Ti CF8 CF8M
Valve body
Linear single-seat casting ball valve
Material of valve spool
1Cr18Ni9、0Cr18Ni12Mo2Ti CF8 CF8M
Upper cover
General (normal temperature)、heat sink(medium temperature)、low temperature
Components
Positioner hand wheel electric/gas convertor    air filter regulator
Adjustable ratio  R
30:1
Connector of air supply
M16×1.5
 
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