ZJH Series Pneumatic Diaphragm Control Regulating Ball Valve

ZJH Series Pneumatic Diaphragm Control Regulating Ball Valve

Pneumatic diaphragm regulating control valve

comprises a multiple spring zero adjustable actuator, a low flow resistance sleeve and a single seat regulation valve without lower cover. The flow capacity increases by 1/3. It's of low center of gravity, high vibration resistance and easy for installation. The performance indexes are superior to products of the same kind. The products are widely used in automatic production control system in industrials including chemistry, petroleum, light industry, power station, metallurgy.

Model

  • Inherent Regulation Ratio:50:1
  • Nominal Pressure :1.6 / 4.0 / 6.4 MPa
  • Service Temperature:-100~-60℃; -200~-100℃; -250~-200℃
  • Ambient Temperature:-30~70℃
  • Air Supply Pressure :0.14 / 0.25 / 0.40 KPa
  • Spring Range:20~100(Basic type) / 40~200 / 80~240 KPa

Nominal Size DN (mm) 20 25 32 40 50 65 80 100 125 150 200 250 300
10 12 15 20
Rated Flow Coefficient CV High accuracy flow characteristic clack 1.6 2.5 4.0 6.3 10 17 24 44 68 99 175 275 360 630 900 1440
High capacoty flow characteristic clack 1.8 2.8 4.4 6.9 11 21 30 50 85 125 200 310 440 690 1000 1600
Rated Stroke(mm) 10 16 25 40 60 100
Effective Diaphragm Area cm2 280 400 630 1000 1600
Inherent Regulation Ratio 50:1
Nominal Pressure MPa 1.6 / 4.0 / 6.4
Sevice Temperature  -100~-60℃; -200~-100℃; -250~-200℃
Ambient Temperature -30~70℃
Air Supply Pressure KPa 0.14 / 0.25 / 0.40
Spring Range KPa 20~100(Basic type) / 40~200 / 80~240
Connection Thread G1/4" , M16X1.5

 

1. Major performance indexes shall be as shown in below table

2. Testing shall be conducted according to the specification of GB/T4213-92

Serial No. Technical Performance Without Positioner With Positioner
1 Basic Error ≤±5% ≤±1%
2 Return Difference ≤3% ≤1%
3 Dead Zone ≤3% ≤0.4%
4 Leakage

ZJHP Type: ≤1X10-4Rated Flow

ZJHM Type:≤1X10-3 Rated Flow

5 Rated Flow Coefficient ≤±10%
6 Inherent Flow Characteristic Slope±30%

 


 

 

 

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