Control Valves
Pneumatic Diaphragm Control Valve
- Simple Control: Uses compressed air as power source with simple and clear control system
- Fast Response: Responds quickly to control signals for timely regulation
- Intrinsic Safety: Uses pneumatic actuators without requiring additional explosion-proof measures
- Compact Structure: Equipped with multi-spring diaphragm actuators, featuring compact structure, light weight, and responsive operation
- Low Flow Resistance: Low flow resistance straight-through single-seat valve structure with minimal pressure drop loss and large valve capacity
- Good Flow Characteristics: Can select linear or equal percentage flow characteristics according to process requirements
Pneumatic Diaphragm Control Valve uses compressed air as the power source and a cylinder as the actuator, and drives the valve through accessories such as electric valve positioners, converters, solenoid valves, and holding valves to achieve on-off or proportional control. The valve is mainly composed of a pneumatic multi-spring diaphragm actuator and a low flow resistance straight-through single-seat valve (or cage valve). It features simple control, fast response, and intrinsic safety, and is widely used in industrial automation control systems in petroleum, chemical, power, and metallurgy industries.
Technical Standards
| Item | Technical Standard |
|---|---|
| Nominal Diameter | DN15-DN300 |
| Nominal Pressure | 1.6, 4.0, 6.4 MPa |
| Pressure Range | 1.6-6.4 MPa |
| Temperature Range | -40℃ to +450℃ |
| Valve Core Structure | Plunger Type Structure |
| Actuator | Multi-spring Diaphragm Actuator |
| Signal Range | 20-100 kPa |
| Flow Characteristic | Linear, Equal Percentage |
Basic Models
| Model | Type | Features |
|---|---|---|
| ZMAN | Pneumatic Diaphragm Single-seat Control Valve | Straight-through single-seat top-guided structure with minimal leakage |
| ZJHP | Pneumatic Diaphragm Single-seat Control Valve | Equipped with multi-spring diaphragm actuator with compact structure |
| ZJHM | Pneumatic Diaphragm Cage Control Valve | Cage valve structure with good stability and low noise |
| ZJHN | Pneumatic Diaphragm Double-seat Control Valve | Double-seat valve structure with large flow capacity and small unbalanced force |
Main Components Material Table
| No. | Part Name | Material |
|---|---|---|
| 1 | Valve Body | Cast Steel, Stainless Steel, Alloy Steel |
| 2 | Valve Core | Stainless Steel, Carbide |
| 3 | Valve Seat | Stainless Steel, Carbide |
| 4 | Valve Stem | Stainless Steel, 316, 316L |
| 5 | Packing | PTFE, Flexible Graphite |
| 6 | Actuator | Aluminum Alloy, Cast Iron |
| 7 | Spring | Carbon Steel, Stainless Steel |
| 8 | Diaphragm | Synthetic Rubber, Fluororubber |
No drawing available.
