Pneumatic single seat adjustment valve

Pneumatic control valve is a high-precision automatic control valve driven by pneumatic actuator, widely used in petroleum, chemical, electric power, metallurgy, pharmaceutical and environmental protection and other working conditions. The valve is suitable for water, steam, gas, oil and various corrosive media, with excellent corrosion resistance and sealing performance. Pneumatic control valves drive the actuator through pneumatic pressure to achieve precise adjustment of the spool, control flow, pressure and temperature, fast response speed, stable control, suitable for complex automation control systems. The advantages of the product include compact structure, high adjustment precision, long life, easy maintenance, and a wide range of adaptability. Pneumatic control valves support a variety of control signal input, easy to integrate with DCS, PLC system to realize remote intelligent control. Its efficient and stable performance effectively improves the safety and automation level of industrial production process, and is an indispensable and important control equipment for modern industrial piping system.

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products

Pneumatic single seat adjustment valve

Model: ZMAP

Subtitle: Unbalanced Control Valve

Pneumatic Single Seat Control Valve is a high performance control valve designed to precisely control fluid pressure, flow or temperature. The valve is driven by a pneumatic actuator and adopts a single-seat plug structure with compact design, fast response and high reliability, suitable for harsh industrial environments such as oil and gas, chemical industry, power generation, etc., especially for explosion-proof applications...

Tags:pressure regulating valve, Flow Control Valve, Temperature regulating valves

Classification:Pneumatic Control Valve

Working conditions:chemical plant, power plants, waterwork, petrochemical industry

Product Overview

The Pneumatic Single Seated Control Valve is a high performance control valve designed to precisely control fluid pressure, flow or temperature. The valve is driven by a pneumatic actuator and utilizes a single-seated plug structure with a compact design, fast response and high reliability, making it suitable for use in harsh industrial environments such as oil and gas, chemical, power generation, etc., and is especially suited for explosion-proof applications.

Applicable working conditions

Chemical industry: precise dosing and flow control of corrosive media (acids, alkalis).

Oil and gas: pipeline pressure regulation and separator level control.

Power systems: boiler feedwater and steam flow regulation.

Pharmaceutical and food: aseptic fluid control and temperature regulation.

Main features

Pneumatic actuators:

Type: Spring-return diaphragm or piston actuator with fail-open (FO) or fail-closed (FC) mode.
Gas source: Standard 0.2-1.0 MPa (20-100 psi), response time <1 second.
Explosion-proof certification: ATEX, IECEx (Zone 1/2) for hazardous areas.

Single-seat valve design:

High sealing performance: ANSI Class IV or Class VI leakage rates for critical shutdown applications.
Differential Pressure Limit: For medium/low differential pressure (≤6.9 MPa) to avoid excessive unbalance force.

Flow characteristics:

Linear, Equal Percentage, or Rapid Open valve internals options with customizable flow curves.
Flow Coefficient (Cv): 0.01-120, covering low to high flow requirements.

Materials & Durability:

Valve body materials: carbon steel (WCB), stainless steel (304/316L), duplex steel (UNS S32205).
Spool and seat: Stellite alloy overlay or ceramic coating for wear and cavitation resistance.
Seals: PTFE, graphite or metal bellows for temperatures from -40°C to 450°C.

Compatibility:

Signal inputs: 4-20 mA, 3-15 psi pneumatic; supports HART communications.
Accessories: positioners, solenoid valves, limit switches, air filtration and pressure reducing valves.

Comparison of similar products

specificities	Pneumatic Single Seat Valves	Electric Single Seat Valve
power source	compressed air	electrical power
responsiveness	Fast (<1 second)	Slower (2-10 seconds)
flameproof	Intrinsically safe (no additional requirements)	Requires explosion proof motor/enclosure
control accuracy	±1%-2%	±0.5%-1% (with smart positioner)
matrix	Wet, flammable, dusty areas	Clean, hazard-free areas

Product Advantages

Fast response: millisecond adjustment by pneumatic drive.

Explosion-proof safety: non-sparking design, ATEX/IECEx certified.

Easy maintenance: modular design allows for quick spool and seal replacement.

Cost-effective: Lower operating costs compared to motorized valves.

Medium of use

petroleum, Water/hot water, oils, petrochemical, Air (compressed air), vapor

working condition

chemical plant, power plants, waterwork, petrochemical industry, paper mills

summarize

Pneumatic single-seated control valves provide fast response, explosion-proof safety and reliability in demanding industrial environments. Its single-seat design ensures excellent shutoff performance, and modular components minimize downtime. Whether handling corrosive fluids or high-temperature steam, the valves provide precise, stable control for critical applications in the chemical, oil and gas, and power industries.

Product Parameters

Nominal diameter	DN15-DN200 (½"-8")
Nominal pressure	PN16-PN100 / Class 150-600 (ASME B16.34)
Applicable temperature	-40°C to 450°C (depending on seal)
leakage rate	ANSI Class IV (standard) / Class VI (optional)
Supply pressure	0.14-0.7 MPa (20-100 psi)
response time (technology)	1-5 seconds
connection method	Flange (RF/RTJ), Socket Weld (SW)