Pneumatic Finned Bonnet Control Valve
Pneumatic Finned Bonnet Control Valve
Pneumatic Finned Bonnet Control Valve
Pneumatic Finned Bonnet Control Valve

Pneumatic Finned Bonnet Control Valve

  • Finned bonnet dissipates heat in high-temperature service, protecting the diaphragm actuator from overheating
  • Single-seat, double-seat and cage types for different leakage, pressure drop and stability requirements; multi-spring actuator
  • DN20-400, PN0.6-6.4 MPa; linear, equal percentage and quick-opening; media -100 °C to +450 °C

Category

Overview

ZJHPS pneumatic finned bonnet control valve is a commonly used control valve in automatic control systems, consisting of a pneumatic diaphragm actuator and a low-flow-resistance control valve body. The single-seat type is suitable for applications with strict leakage requirements, low differential pressure across the valve, and media with a certain viscosity or containing fibers. The double-seat type features small unbalanced force, high allowable differential pressure and high flow capacity, and is suitable for applications with less stringent leakage requirements. The cage type offers good stability, low vibration tendency, low noise and insensitivity to temperature changes, and is suitable for applications with relatively high differential pressure and less stringent leakage requirements.

Performance Specifications

Item Type Value
Basic Error (%) Without positioner ±5.0
With positioner ±1.0
Hysteresis (%) Without positioner 3.0
With positioner 1.0
Dead Band (%) Without positioner 3.0
With positioner 0.4
Allowable Leakage (L/h) 1 × 10-3 × rated valve capacity

Specifications & Technical Parameters

Nominal Diameter DN (mm) DN20 25 40 50 65 80 100 150 200 250 300 350 400
Seat Diameter (mm) 10 12 15 20 25 32 40 50 65 80 100 125 150 200 250 300 Available on request
Rated Flow Coefficient Kv Linear 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 PN (MPa) 0.6, 1.6, 4.0, 6.4
Rated Stroke (mm) 10 16 25 40 60 100
Flow Characteristic Linear, equal percentage, quick-opening
Medium Temperature (°C) Normal: -15~200; -40~+250; medium-temperature: -40~+450; low-temperature: -100~+200
Flange Dimensions Cast iron flanges per JB78; cast steel flanges per JB79
Flange Type Complies with JB78-59, JB79-59; can be manufactured to JB/T79.1-94, JB/T79.2-94, ANSI, JIS, DIN standards
Body Material PN (MPa) 0.6, 1.6 WCB (ZG230-450), CF3, CF8, CF8M
4.0, 6.4 WCB (ZG230-450), ZG1Cr18Ni9Ti, ZG0Cr18Ni12Mo2Ti, CF8, CF8M
Body Form Straight-through single-seat cast globe valve
Plug Material 1Cr18Ni9, 0Cr18Ni12Mo2Ti, CF8, CF8M
Bonnet Type Plain (normal temperature), finned (medium temperature), low-temperature
Optional Accessories Positioner, handwheel, electric/pneumatic converter, air filter regulator
Rangeability R 30:1
Air Connection M16×1.5

Actuator Technical Parameters

Model ZHA(B)-1 ZHA(B)-2 ZHA(B)-3 ZHA(B)-4 ZHA(B)-5 ZHA(B)-6
Effective Area (cm2) 200 280 400 630 1000 1600
Stroke (mm) 10 16 25 40 60 100
Spring Range (kPa) 20~100 (standard); 40~200; 80~240; 20~60; 60~100

Allowable Differential Pressure

Supply Pressure (MPa) Spring Range (kPa) Nominal Diameter DN20 25 32 40 50 65 80 100 125 150 200 250 300
Seat Diameter 10 12 15 20 25 32 40 50 65 80 100 125 150 200 250 300
0.14 20-100 Allowable Differential Pressure (MPa) 5.3 3.7 2.3 1.3 0.8 0.5 0.5 0.3 0.25 0.2 0.12 0.12 0.08 0.05 0.05 0.035
0.24 40-200 6.4 6.4 5.5 3.1 1.8 1.2 1.1 0.7 0.65 0.45 0.18 0.18 0.10 0.10 0.10 0.07

Overall Dimensions

DN D (mm) L (mm) H (mm) H1 (mm)
PN1.6 PN4.0 PN6.4 Normal type Medium-temp type
25 280 185 190 200 685 835 115
32 280 200 210 210 696 847 120
40 325 220 230 235 754 905 130
50 325 250 255 265 784 935 145
65 410 275 285 295 1065 1219 180
80 410 300 310 320 1076 1239 195
100 410 350 355 370 1085 1248 200
125 495 410 425 440 1286 1498 245
150 495 450 460 475 1306 1518 255
200 495 550 560 570 1381 1593 275
250 620 670 740 752 1455 1645 380
300 620 770 803 819 1510 1690 430

Main Parts Materials & Temperature Range

Component Material Temperature Range
Valve Body & Bonnet HT200 -20 ~ 200 °C
ZG230-450 -40 ~ 450 °C
ZG1Cr18Ni9Ti -250 ~ 550 °C
Plug, Seat & Stem 1Cr18Ni9 -250 ~ 550 °C
Upper & Lower Diaphragm Plates A3 steel plate
Yoke & Bonnet Cap HT200
Compression Spring 60Si2Mn
Corrugated Diaphragm 5806 rubber with 480D nylon 66 mesh fabric
Packing PTFE -40 ~ 200 °C
Carbon fiber -120 ~ 350 °C
Flexible graphite -40 ~ 600 °C

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