GEROYAL's ZJHL pneumatic diaphragm cage type control valve is a top-guided low-noise control valve, consisting of a multi-spring pneumatic actuator and a low-flow resistance cage type valve body. The multi-spring actuator is characterized by its low height, light weight, and simple assembly. The valve internals feature a single-seat guided valve core. The pneumatic diaphragm cage type control valve primarily utilizes fluid pressure to achieve rapid movement of the valve core, with minimal operating force and a single-seat sealing design for high precision flow characteristic curves. The valve body of the pneumatic cage type control valve has an S-shaped streamline channel, offering advantages such as compact structure, light weight, sensitive operation, low pressure drop loss, large valve capacity, accurate flow characteristics, and easy maintenance, making it suitable for stringent working conditions. The pneumatic diaphragm cage type control valve boasts good dynamic stability, low noise, and resistance to chemical corrosion, making it ideal for controlling fluids with high pressure differences at various temperatures. It is primarily used in applications where the allowable leakage is extremely low and the pressure difference before and after the valve is significant.
Pneumatic Diaphragm Cage Type Control Valve - Main Technical Parameters
| Nominal Diameter (DN) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Valve Seat Diameter (DN) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | |
| Rated Flow Coefficient (KV) | Linear | 10 | 11 | 17.6 | 27.5 | 44 | 69 | 110 | 176 | 275 | 440 | 630 | 1000 | 1600 |
| Wait for percentage | 6.3 | 10 | 16 | 25 | 40 | 63 | 100 | 155 | 250 | 370 | 580 | 900 | 1300 | |
| Permitted Pressure Difference (MPa) | 6.4 | 6.4 | 5.2 | 5.2 | 4.6 | 4.6 | 3.7 | 3.7 | 3.5 | 3.1 | 3.1 | 2.6 | 2.2 | |
| Nominal Pressure (MPa) | 1.6、2.5、4.0、6.4、10.0 | |||||||||||||
| Rated Stroke (mm) | 16 | 25 | 40 | 60 | 100 | |||||||||
| Model for Actuator Compatibility | 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 قابلي للإزالة | Bolt-tensioned | |||||||||||||
| Sealed packing material | V-shaped polytetrafluoroethylene packing, V-shaped flexible graphite packing | |||||||||||||
| Valve Core Type | Lug-type single seat plug valve core, lug-type sleeve double guided valve core | |||||||||||||
| Flow characteristics | Linearity, equal percentage | |||||||||||||
Pneumatic Diaphragm Cage Type Control Valve Actuator Technical Specifications
| Configuration Actuator Type | ZHA/B Multi-Spring Membrane Actuator | ||||
|---|---|---|---|---|---|
| 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 interlined with nylon fabric, Ethylene Propylene rubber interlined with nylon fabric | ||||
| Supply Pressure | 140～400KPa | ||||
| Gas Source Interface | RC1/4" | ||||
| Ambient Temperature | -30～+70℃ | ||||
| Available accessories | Locators, air filter regulators, retaining 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 Bellow Type Control Valve - Main Component Materials
| 1 | Valve body | WCB | 304 | 316 | 316L |
|---|---|---|---|---|---|
| 2 | Gasket | PTFE & Graphite Gaskets | PTFE & Graphite Gaskets | PTFE/Graf Pad | PTFE/Graf Sheet |
| 3 | Valve Seat / Valve Body | 304 | 304 | 316 | 316L |
| 4 | Valve Core | 304 | 304 | 316 | 316L |
| 5 | Guiding sleeve/union cap | 304 | 304 | 316 | 316L |
| 6 | Mid-padding | PTFE and Graphite Gaskets | PTFE/Graf Sheet Gasket | PTFE/Grafite Gaskets | PTFE石墨 gaskets |
| 7 | Valve Cover | WCB | 304 | 316 | 316L |
| 8 | Valve Stem | 304 | 304 | 316 | 316L |
| 9 | Metal washer | 304 | 304 | 316 | 316L |
| 10 | Filling Material | PTFE/Graphite | PTFE/Graphite | PTFE/Graphite | PTFE/Graphite |
| 11 | Bolt | 25 | Stainless Steel | Stainless Steel | Stainless steel |
| 12 | Filling Cap | WCB | 304 | 316 | 316L |
Pneumatic Diaphragm Bellows Type Regulating Valve - Main Performance Indicators
| Project | Without a locator | With locator | ||
|---|---|---|---|---|
| Basic Error % | ±5.0 | ±1.0 | ||
| Difference Return % | 3.0 | 1.0 | ||
| Dead Zone % | 3.0 | 0.4 | ||
| Always Point Deviation % | Air valve | Origin | ±2.5 | ±1.0 |
| Origin | ±5.0 | ±1.0 | ||
| Air Valve | Starting Point | ±5.0 | ±1.0 | |
| End Point | ±2.5 | ±1.0 | ||
| Rated travel deviation % | ≤2.5 | |||
| Leakage Rate L/h | 0.01% of rated capacity | |||
| Adjustable Range: R | 30：1 | |||
Pneumatic Diaphragm Lobe Control Valve - Product Selection
(1) Valve Body Parameters: Nominal Pipe Size, 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 detailed the technical specifications above to facilitate our production and technical team in accurately selecting the right product for you. If you have any questions, feel free to call us; we are committed to providing you with the best service possible!
