Product Introduction:

The pneumatic diaphragm single-seat control valve adopts compressed air as power source. It receives 4–20mA DC analog signal from PLC/DCS system via smart valve positioner, to linearly adjust valve opening, continuously regulating pipeline flow, pressure, temperature and liquid level.Equipped with bypass manual handwheel for emergency operation when air supply fails; matched with air filter regulator to supply clean and stable instrument air for actuator and positioner. WCB carbon steel body is applicable for steam, hot oil and general industrial fluid. Single-seat trim features tight shutoff & low leakage rate.

Main Features

1. Superior tight sealing performance, low internal leakage, suitable for regulation + slight shutoff working condition.

2. High regulating linearity & precision, stable modulating performance for process loop control.

3. Diaphragm actuator with spring reset, can realize Fail Close(FC)/Fail Open(FO)/Fail Lock(FL) safety mode upon air loss.

4. Side-mounted handwheel for manual override, avoid production shutdown caused by actuator or air source fault.

5. Complete accessories configuration: smart digital positioner with local valve position display, air filter pressure reducing valve for air pretreatment.

6. Explosion-proof optional for flammable & explosive working conditions (oil & gas, chemical plant).

7. Simple structure, easy maintenance and spare parts replacement.

Technical Parameter:

• Nominal Pressure: PN16 / PN25 / CL150 / CL300

• Body Material: WCB Carbon Steel, CF8(304), CF8M(316), Cast Iron

• Trim Material: 416Stainless Steel, Stellite hardfacing for anti-cavitation

• Connection Type: Flange RF (ANSI B16.5 / GB/T9113)

• Actuator Type: Pneumatic Diaphragm Actuator

• Control Signal: 4–20mA DC

• Air Supply Pressure: 0.02~0.05MPa

• Working Temperature: -20℃ ~ 425℃ (WCB body)

• Action Mode: Direct Acting / Reverse Acting

• Sealing Grade: Class IV / Class VI (soft seal optional for bubble tight shutoff)

Applicable Medium:

Saturated steam, superheated steam, thermal oil, hot circulating water, fuel oil, lubricating oil, compressed air, neutral industrial water, weak acid & weak alkali solution, purified water.

All valves are equipped with professional export protective packaging. 

With protective caps on the sealing surfaces, rust-proof treatment, and shock-absorbing material filling to ensure intact transport; the loading is secure and safe. 

We can also customize packaging according to customer requirements.

Regarding transportation methods, we can provide appropriate transportation options based on the cargo requirements and the customer's timeliness requirements. 

Common transportation methods include: sea freight, air freight, land freight, and express delivery.