Body type: Straight-through cast control valve
Spool form: Sleeve, single-seat, double-seat, cage balanced or three-way type
Nominal diameter: DN20–DN400; 3/4″–16″
Nominal pressure: PN1.6–10.0MPa; ANSI 150, 300, 600
Flow characteristic: Linear, equal percentage, parabola
Applicable temperature: -29℃ to +250℃; optional -60℃ to +560℃
Leakage standard: Class IV, Class V, Class VI
Connection mode: Flanged, threaded, welded
Actuator: Pneumatic diaphragm actuator
Control signal: 4–20mA, 0–10V and other control signals
The Pneumatic Diaphragm Sleeve Control Valve is designed for automatic regulation of flow, pressure, temperature and liquid level in industrial process pipelines. It combines a pneumatic diaphragm actuator, sleeve-guided trim, valve body, stem, seat, packing and control accessories to provide stable throttling performance and accurate positioning.
This valve can be configured with different spool forms, including single-seat, sleeve double-seat, cage single-seat balanced, double-seat and three-way structures. According to the service condition, it can be supplied as standard type, heat dissipation type, regulation cut type, bellows seal type or jacket insulation type.
The valve is suitable for liquid, gas and steam service where stable control, reliable shutoff and material compatibility are required. Body materials, trim materials, packing and actuator configuration can be selected according to medium, pressure, temperature, leakage class and control signal requirements.
The sleeve trim structure provides stable flow regulation and reliable throttling performance for industrial control loops.
Multiple spool forms are available, including single-seat, sleeve double-seat, cage single-seat balanced, double-seat and three-way configurations.
Linear, equal percentage and parabola flow characteristics can be selected according to process control requirements.
The valve supports standard service, heat dissipation service, bellows seal service and jacket insulation service.
Body materials include WCB, CF8, CF8M and CF3M for different media and corrosion requirements.
Trim materials include 304, 316 and 316L, with optional Stellite alloy surfacing for improved wear resistance.
PTFE or flexible graphite packing can be selected according to working temperature and sealing requirements.
Leakage classes include Class IV, Class V and Class VI for different shutoff requirements.
The pneumatic diaphragm actuator can work with positioners and accepts 4–20mA, 0–10V and other control signals.
| Item | Specification |
|---|---|
| Product Name | Pneumatic Diaphragm Sleeve Control Valve |
| Valve Diameter | DN20–DN400 / 3/4″–16″ |
| Nominal Pressure | PN1.6, PN2.5, PN4.0, PN6.4, PN10.0MPa |
| ANSI Class | ANSI 150, 300, 600 |
| Spool Form | P: Single seat; M: Sleeve double seat; G: Cage single seat balanced; N: Double seat; X: Three-way |
| Flow Characteristic | Linear, Equal Percentage, Parabola |
| Structure Type | Standard type, Heat dissipation type, Regulation cut type, Bellows seal type, Jacket insulation type |
| Applicable Temperature | -29℃ to +250℃; optional -60℃ to +560℃ |
| Leakage Standard | Class IV, Class V, Class VI |
| Connection Mode | Flanged, threaded, welded |
| Adjustable Ratio | 50:1 |
| Spring Range | 20–100kPa, 40–200kPa, 80–240kPa |
| Air Source Pressure | 0.14, 0.25, 0.28, 0.4MPa |
| Positioner Input Signal | 4–20mA, 0–10V and other control signals |
| Part | Material |
|---|---|
| Valve Body, Cover | WCB, CF8, CF8M, CF3M |
| Valve Core, Seat | 304, 316, 316L; optional Stellite alloy surfacing |
| Stem | 304, 316, 316L, 17-4PH |
| Packing | PTFE, Flexible Graphite |
| Bellows | 304, 316, 316L |
| Sealing Gasket | Stainless Steel + Graphite |
| Membrane Cap | Q235 |
| Corrugated Diaphragm | Clip reinforced nylon fabric nitrile rubber |
| Spring | 60Si2Mn |
| DN | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Linear | 6.9 | 11 | 17.6 | 27.5 | 44 | 69 | 110 | 176 | 275 | 440 | 690 | 960 | 1300 | 2150 | 2816 |
| Equal Percentage | 6.3 | 10 | 16 | 25 | 40 | 63 | 100 | 160 | 250 | 400 | 630 | 900 | 1200 | 1960 | 2560 |
| DN Range | Rated Stroke | Pneumatic Actuator |
|---|---|---|
| DN20–DN25 | 16mm | PZM280(I) |
| DN32–DN65 | 25mm | PZM400(I) |
| DN80–DN100 | 40mm | PZM600(I) |
| DN125–DN150 | 60mm | PZM1000 |
| DN200–DN400 | 100mm | PZM1600 |
| No. | Item | Pneumatic Control Valve Standard Type | Pneumatic Control Valve Cooling / Cryogenic Type | Electric Regulating Valve Standard Type | Electric Regulating Valve Cooling / Cryogenic Type |
|---|---|---|---|---|---|
| 1 | Basic Error ＜(%) | ±1.0 | ±2.5 | ±1.0 | ±2.0 |
| 2 | Return Difference ＜(%) | 1.0 | 2.5 | ±1.0 | 2.0 |
| 3 | Dead Zone ＜(%) | 0.4 | 1.0 | 1.0 | 2.0 |
| 4 | Always Point Deviation ＜(%) | ±1.0 | ±2.5 | ±1.0 | ±2.0 |
| 5 | Rated Stroke Deviation ＜(%) | ±2.5 | ±2.5 | ±2.5 | ±2.5 |
Note: The above data is standard configuration. Other materials and customized structures are available according to the actual working condition and order contract.
| Application | Use |
|---|---|
| Oil and Gas | Flow, pressure and temperature control in process pipelines |
| Petrochemical | Medium flow regulation in chemical and refining units |
| Chemical Processing | Corrosive liquid and gas control with stainless steel material options |
| Power Plant | Steam, condensate and boiler water regulation |
| Metallurgy | Gas, water and process medium control in production lines |
| Water Treatment | Flow and pressure control for water and chemical dosing systems |
| Heat Exchange Systems | Temperature control for heating and cooling circuits |
| General Industrial Automation | Pneumatic control loops requiring positioner-based regulation |
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