Our ZJHP pneumatic diaphragm single seat control valve boasts compact structure, light weight, sensitive operation, low pressure drop loss, large valve capacity, accurate flow characteristics, and easy maintenance, making it suitable for harsh working conditions. The pneumatic diaphragm single seat control valve is composed of a multi-spring pneumatic diaphragm actuator and a low-flow resistance precision single seat control valve body. The multi-spring actuator is characterized by its low height, light weight, and easy installation. Equipped with a valve positioner, the pneumatic diaphragm single seat control valve converts current signals into corresponding linear displacements, automatically controlling the valve opening to continuously regulate process parameters such as pressure, flow rate, temperature, and liquid level within the pipeline. Widely used for accurate control of gases, liquids, steam, and other media, the pneumatic single seat control valve is particularly suitable for applications with small allowable pressure differences and moderate leakage under pressure.
The pneumatic single seat regulating valve operates stably with reliable action characteristics, featuring minimal seat leakage, accurate flow characteristics, and a wide adjustable range. It is sure to achieve high-quality control effects with its superior advantages in wide applications.
GasActuating Film Single Seat Regulating Valve - Technical Specifications
| Nominal Diameter (DN) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 |
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| Valve Seat Diameter (DN) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 |
| Rated Flow Coefficient (KV) | Straight | 6.9 | 11 | 17.6 | 27.5 | 44 | 69 | 110 | 176 | 275 | 440 | 630 | 875 | 1250 |
| Wait for 100% | 6.3 | 10 | 16 | 25 | 40 | 63 | 100 | 160 | 250 | 360 | 570 | 850 | 1180 |
| Permitted Pressure Difference (MPa) | 3.2 | 3.0 | 2.0 | 1.8 | 1.5 | 1.4 | 1.0 | 0,7 | 0.6 | 0.5 | 0.3 | 0.2 | 0.1 |
| Nominal Pressure (MPa) | 1.6、2.5、4.0、6.4、10.0 |
| Rated Stroke (mm) | 16 | 25 | 40 | 60 | 100 |
| Actuator Model | ZHA/B-22 | ZHA/B-23 | ZHA/B-34 | ZHA/B-45 | ZHA/B-56 |
| Valve cover style | Standard Type (-17～+250℃), High-Temperature Type (+250～+450℃), Low-Temperature Type (-40～-196℃), Bellows-Sealed Type (-40～+350℃) |
| غطاء ضغط | Bolt-tensioned |
| Sealant Material | V-shaped polytetrafluoroethylene packing, V-shaped flexible graphite packing |
| Valve core style | Single Seat Plunger Valve Core |
| Flow characteristics | Linearity, equal percentage |
Pneumatic Diaphragm Single Seat Control Valve, Actuator
| Configurable Actuator Type | ZHA/B Multi-spring Membrane Actuator |
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| Actuator Model | ZHA/B-22 | ZHA/B-23 | ZHA/B-34 | ZHA/B-45 | ZHA/B-56 |
| Effective Area (cm²) | 350 | 350 | 560 | 900 | 1400 |
| Travel Distance (mm) | 10、16 | 24 | 40 | 40、60 | 100 |
| Spring Range (KPa) | 20-100 (standard), 20-60, 60-100, 40-200, 80-240 |
| Diaphragm material | Nitrile rubber laminated with nylon fabric, Ethylene Propylene rubber laminated with nylon fabric |
| Supply Pressure | 140～400KPa |
| Gas Source Interface | RC1/4" |
| Ambient Temperature | -30～+70℃ |
| Available accessories | Locators, air filter regulators, hold-open valves, stroke switches, valve position transmitters, handwheels, etc. |
| Functionality | Gas-Closed (B) — Valve opens (FO) when gas is lost; Gas-Open (K) — Valve closes (FC) when gas is lost |
Pneumatic Diaphragm Single Seat Control Valve - Performance Specifications
| Project | No GPS tracker | Tracker-equipped |
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| Basic Error % | ±5.0 | ±1.0 |
| Difference Rate % | 3.0 | 1.0 |
| Dead Zone % | 3.0 | 0.4 |
| Always Point Deviation % | Gas Open | Origin | ±2.5 | ±1.0 |
| Origin | ±5.0 | ±1.0 |
| Air valve | Origin | ±5.0 | ±1.0 |
| End Point | ±2.5 | ±1.0 |
| Rated Stroke Deviation % | ≤2.5 |
| Leakage Rate L/h | 0.01% of rated capacity |
| Adjustable Range R | 30：1 |
Pneumatic Diaphragm Single Seat Control Valve - Parts Material
| Serial Number | Part Name | Parts Material |
|---|
| 1 | Valve body | WCB(ZG25) | CF8(304) | CF8M(316) | CF3M(316L) |
| 2 | Gasket | 304 | 304 | 316 | 316L |
| 3 | Valve Seat | 304 | 304 | 316 | 316L |
| 4 | Valve Core | 304 | 304 | 316 | 316L |
| 5 | Guiding sleeve | 304 | 304 | 316 | 316L |
| 6 | Middle Padding | PTFE, metal graphite wrapped gaskets |
| 7 | Valve cover | WCB(ZG25) | CF8(304) | CF8M(316) | CF3M(316L) |
| 8 | Valve Stem | 304 | 304 | 316 | 316L |
| 9 | Filling Material | PTFE, Graphite |
| 10 | Pressure Cap | WCB(ZG25) | CF8(304) | CF8M(316) | CF3M(316L) |
Pneumatic Diaphragm Single Seat Control Valve - Product Selection
(1) Valve Body Parameters: Nominal Diameter, Working Pressure, Process Medium, Application, Valve Body Material, and a series of other parameters.
(2) Actuator Parameters: Actuator Type, Control Method, Control Signal (4-20mA, 1-5V), Operation Mode (Air-Open, Air-Close)
Please provide as much detail as possible for the above technical specifications to facilitate our production and technical staff in accurately selecting the right products for you. If you have any questions, feel free to call us, and we will strive to provide you with excellent service!
Related Names: ZJHP Pneumatic Diaphragm Single Seat Control Valve, Pneumatic Diaphragm Control Valve, Pneumatic Single Seat Control Valve
