Our company's ZJHJP miniature pneumatic regulating valve is composed of a multi-spring pneumatic diaphragm actuator and a low-flow resistance miniature regulating valve body. The multi-spring actuator is characterized by its low height, light weight, and simple installation. The valve body of the miniature pneumatic regulating valve features an S-shaped streamlined flow channel, offering benefits such as compact structure, light weight, sensitive operation, low pressure drop loss, large valve capacity, accurate flow characteristics, and easy maintenance. It is suitable for harsh working conditions. The pneumatic diaphragm regulating valve is equipped with an electric-pneumatic valve positioner or a pneumatic valve positioner, enabling automatic regulation and control of the process fluid medium. The miniature pneumatic diaphragm regulating valve is widely used in maintaining process parameters such as pressure, flow rate, temperature, and liquid level for gases, liquids, steam, and other media at specified values. It is particularly suitable for applications with small allowable leakage, relatively low pressure difference before and after the valve, and media with certain viscosity and a small amount of fiber.
Miniature pneumatic regulating valve Technical specifications
| Nominal Pipe Size (NPS) | 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) | Single Seat | 6.9 | 11 | 17.6 | 27.5 | 44 | 69 | 110 | 176 | 275 | 440 | 630 | 875 | 1250 |
| Sleeve | 6.3 | 10 | 16 | 25 | 40 | 63 | 100 | 160 | 250 | 360 | 570 | 850 | 1180 |
| Permitted Pressure Difference (MPa) | Single Seat | 3.8 | 3.2 | 3.0 | 2.0 | 1.8 | 1.5 | 1.4 | 1.0 | 0,7 | 0.6 | 0.5 | 0.3 | 0.1 |
| Sleeve | 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 |
| 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℃) |
| Covered cap style | Bolt-tensioned |
| Sealed packing material | V-shaped polytetrafluoroethylene packing, V-shaped flexible graphite packing |
| Valve core style | Single-seated, sleeve-type |
| Flow Characteristics | Percentages, linearity |
Miniature pneumatic regulating valve, actuator
| Configuration Actuator Type | ZHA/B Multi-Spring Film 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, EPDM 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, limit switches, 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 |
Miniature pneumatic regulating valve - Performance specifications
| Project | No GPS Tracker | With locator |
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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 % | Air Valve | Starting Point | ±2.5 | ±1.0 |
| Origin | ±5.0 | ±1.0 |
| Air Valve | Starting Point | ±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 |
Miniature pneumatic regulating valve, components material
| 1 | Valve body | WCB | 304 | 316 | 316L |
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| 2 | Gasket | PTFE Gasket, Graphite Sealing Pad | PTFE & Graphite Gaskets | PTFE & Graphite Gaskets | PTFE/Graf Sheet |
| 3 | Valve Seat/Sleeve | 304 | 304 | 316 | 316L |
| 4 | Valve Core | 304 | 304 | 316 | 316L |
| 5 | Guiding sleeve/cover cap | 304 | 304 | 316 | 316L |
| 6 | Mid-padding | PTFE Graphite Gaskets | PTFE/Graf Sheet Gasket | PTFE石墨 gaskets | PTFE Graphite 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 |
Miniature Pneumatic 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), Operating Mode (Air-Open, Air-Shut)
Please provide as much detail as possible regarding the above technical specifications to facilitate our production and technical team in accurately selecting the appropriate options for you. Should you have any questions, feel free to call us, and we will be committed to providing you with excellent service!
Related Names: Miniature Pneumatic Regulating Valve, Pneumatic Diaphragm Regulating Valve, Pneumatic Diaphragm Valve
