Pneumatic Cage-Type Control Valve
Pneumatic Cage-Type Control Valve
Pneumatic Cage-Type Control Valve
Pneumatic Cage-Type Control Valve

Pneumatic Cage-Type Control Valve

  • Balanced plug design: high flow capacity, low noise, stable operation and large allowable differential pressure
  • New-generation cage valve conforming to IEC standards with pneumatic multi-spring diaphragm actuator
  • DN25-400, PN0.6-6.4 MPa; -100 °C to +600 °C; 50:1 rangeability

Category

Overview

ZJHM pneumatic cage-type control valve features compact size, light weight, high performance and large flow capacity. It is a new-generation general-purpose control valve conforming to IEC standards, suitable for general fluid media and process conditions in production control systems. The valve consists of a new-type pneumatic multi-spring diaphragm actuator and a low-flow-resistance cage valve. Features:

  • Balanced plug with small unbalanced force, large allowable differential pressure and stable operation.
  • Large plug guiding area reduces oscillation caused by eddy currents and impact, and minimizes damage.
  • Noise reduced by about 10 dB compared with ordinary single-seat and double-seat control valves.
  • Simple construction, easy assembly, disassembly and maintenance.

Control Valve Technical Parameters

Nominal Diameter (mm)
25
40
50
65
80
100
150
200
250
300
350
400
Seat Diameter (mm)
25
32
40
50
65
80
100
125
150
200
250
300
Available on request
Rated Flow Coefficient Kv Linear 11 17.6 27.5 44 69 110 176 275 440 690 1000 1600
Equal percentage 10 16 25 40 63 100 160 250 400 630 900 1440
Nominal Pressure (MPa) 0.6 1.6 4.0 6.4
Stroke (mm) 16 25 40 60 100    
Flow Characteristic Linear, equal percentage, quick opening
Medium Temperature (°C) -40 ~ 230 °C (normal temperature type); 230 ~ 450 °C with cooling-fin bonnet (medium temperature type); -100 ~ 600 °C (special order)
Flange Standard Per JB78-59 and JB79-59; also available per JB/79.1-94, JB/79.2-94, ANSI, JIS and DIN
Body Material PN (MPa) 0.6, 1.6 WCB(ZG230-450) CF3CF8 CF8M
4.0, 6.4 WCB(ZG230-450), ZG1Cr18Ni9Ti, ZG0Cr18Ni12Mo2Ti CF8 CF8M
Body Type Straight-through single-seat cast globe valve
Plug Material 1Cr18Ni9, 0Cr18Ni12Mo2Ti CF8 CF8M
Bonnet Type Plain (normal temperature type), cooling-fin (medium temperature type), low temperature type
Rangeability R 50:1
Air Supply Connection M16×1.5

Products with flanges to ANSI, JPI and JIS standards are available on request; face-to-face dimensions determined as required.

Actuator Technical Parameters

Model
ZHA(B)-22
ZHA(B)-23
ZHA(B)-34
ZHA(B)-45
Effective Area (cm²) 350 350 560 900
Stroke (mm) 16 25 40 60
Spring Range (kPa) 20 ~ 100 (standard); 40 ~ 200; 80 ~ 240; 20 ~ 60; 60 ~ 100

Performance Specifications

Item
Value
Item
Value
Basic Error (%) Without positioner ±5.0 End Point Deviation (%) Air-to-close Without positioner Starting point ±5.0
End point ±2.5
With positioner ±1.0 With positioner Starting point ±1.0
End point ±1.0
Hysteresis (%) Without positioner 3.0 Air-to-open Without positioner Starting point ±2.5
End point ±5.0
With positioner 1.0 With positioner Starting point ±1.0
End point ±1.0
Dead Band (%) Without positioner 3.0
With positioner 0.4 Allowable Leakage (L/h) 1×10-3 × rated valve capacity
Rated Stroke Deviation (%) ±2.5

Note: This product conforms to GB/T4213-92.

Allowable Differential Pressure

Action
Actuator Model
Spring Range (kPa)
Supply Pressure (kPa)
Accessory Required
Nominal Diameter (Seat Diameter) (mm)
25
40
50
65
80
100
150
200
Air-to-close ZHA-22 20 ~ 100
20 ~ 100
40 ~ 200		 0.14
0.25
0.40		 –
P
P or R		 3.00
6.4
6.4		              
ZHA-23 20 ~ 100
20 ~ 100
40 ~ 200		 0.14
0.25
0.40		 –
P
P or R		   2.25
6.4
6.4		 1.95
6.4
6.4		          
ZHA-34 20 ~ 100
20 ~ 100
40 ~ 200		 0.14
0.25
0.40		 –
P
P or R		       2.36
6.4
6.4		 2.04
6.4
6.4		 1.67
6.4
6.4		    
ZHA-45 20 ~ 100
20 ~ 100
40 ~ 200		 0.14
0.25
0.40		 –
P
P or R		             1.41
6.4
6.4		 1.14
6.4
6.4
Air-to-open ZHA-22 20 ~ 100
40 ~ 200
80 ~ 240		 0.14
0.25
0.40		 –
P or R
P		   1.5
4.5
6.4		            
ZHA-23 20 ~ 100
40 ~ 200
80 ~ 240		 0.14
0.25
0.40		 –
P or R
P		     1.13
3.38
6.40		 0.98
2.93
6.4		        
ZHA-34 20 ~ 100
40 ~ 200
80 ~ 240		 0.14
0.25
0.40		 –
P or R
P		       1.18
3.54
6.4		 1.02
3.06
6.4		 0.84
2.51
5.85		    
ZHA-45 20 ~ 100
40 ~ 200
80 ~ 240		 0.14
0.25
0.40		 –
P or R
P		             0.71
2.12
4.94		 0.57
1.71
4.00

Note: 1. P – valve positioner; R – pressure relay. 2. Allowable differential pressure is the maximum ΔP value with the valve closed (P2 = 0). 3. When the maximum differential pressure exceeds 1.0 MPa, the plug and cage surfaces are hard-faced with hard alloy.

Optional accessories: positioner, air filter regulator, lock-up valve, travel switch, valve position transmitter, solenoid valve, handwheel mechanism, etc.

Overall Dimensions

DN
L
H
H1
Weight (kg)
φA
PN16
PN40
PN64
Standard
High temperature
PN6
PN16
PN40
PN64
PN6, PN16
PN40, PN64
25 185 197 210 410 560 50 57 70 20 24 285
40 222 235 251 455 620 65 75 85 26 35
50 254 267 286 457 627 70 82 90 30 40
65 276 292 311 610 790 80 92 100 47 66 360
80 298 317 337 622 807 95 100 107 55 78
100 352 368 394 640 850 105 110 117 125 65 99
150 451 473 508 870 1130 132 142 150 172 130 160 470
200 600 650 890 1150 160 170 187 207 175 250
250 730 775 1203 1523 187 202 225 235 350 470 580
300 850 900 1234 1554 220 230 257 265 500 660

Main Parts Materials

Part Name
Material
Temperature Range
Valve Body & Upper Bonnet HT200 -20 ~ 200°C
ZG230-450 -40 ~ 450°C
ZG1Cr18Ni9Ti -250 ~ 550°C
ZG0Cr18Ni12Mo2Ti -40 ~ 600°C
Plug & Seat 1Cr18Ni9 -250 ~ 550°C
0Cr18Ni12Mo2Ti -250 ~ 550°C
Packing PTFE -40 ~ 200°C
Diaphragm Nitrile rubber reinforced with polyester fabric  
Compression Spring 60Si2Mn  
Diaphragm Cover A3

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