Ammonia emergency cut-off valve

The ammonia emergency shut-off valve uses a gas source (compressed air, nitrogen) and an electromagnetic valve to control the opening and closing of the valve. It consists of a multi spring pneumatic diaphragm actuator or a floating piston actuator and a regulating valve, which receives signals from the regulating instrument and controls the cutting, connection, or switching of fluids in the process pipeline.

　　Ammonia emergency cut-off valve>Ammonia emergency shut-off valve for ammonia~Ammonia storage tank shut-off valve for ammonia storage tank ammonia shut-off valve for storage tank liquid ammonia shut-off valve

Model: QDQ421F-25C

Type: Normally closed Constant speed, manual gas filling

　　Ammonia emergency cut-off valveShort for Cutout Valve, also known as Liquid Ammonia Emergency Cut off Valve, an emergency shut-off valve for ammonia. A safety valve suitable for controlling and cutting off flow at the inlet and outlet of ammonia/gas storage tank pipelines.

The emergency shut-off valve for ammonia uses a gas source (compressed air, nitrogen) and an electromagnetic valve to control the opening and closing of the valve. It consists of a multi spring pneumatic diaphragm actuator or a floating piston actuator and a regulating valve, which receives signals from the regulating instrument and controls the cutting, connection, or switching of fluids in the process pipeline. In emergency situations, the control room can trigger the solenoid valve switch or manually release the pressure of the gas source, or when the high temperature is ≥ 80C, the melting alloy will melt and the cylinder will automatically release the pressure. The cut-off valve will quickly close within ≤ 3 seconds to prevent leakage, providing safety protection.

　　Ammonia emergency cut-off valveProduct Features:

1. Normally open shut-off valve: The solenoid valve is energized for intake, and the air pressure closes the valve. Close the solenoid valve exhaust and reopen the valve.

2. Normally closed shut-off valve: When the solenoid valve is powered on for air intake, the valve is opened. When the solenoid valve is powered off for exhaust, the valve automatically closes.

3. Manual with pneumatic cut-off valve: In the absence of air/power, the cut-off valve can be manually opened/closed.

Performance specifications:

Pressure rating: 2.5/4.0 Mpa

Cylinder working pressure: ≤ 2.0Mpa

Operating temperature: -40~80

Cylinder medium: nitrogen and anhydrous air

Media used: natural gas, liquefied gas, liquid ammonia

Melting time: ± 70 ℃

Closing time: ≤ 5 seconds

Cylinder opening pressure: ≥ 0.3-0.6Mpa

Valve body material: cast steel WCB. Stainless steel 304.316.316L

matters needing attention;

1. The opening pressure of the emergency shut-off valve cylinder for ammonia should be ≥ 0.3-0.6Mpa, and the daily working pressure of the cylinder should not be lower than 0.4MPa to ensure the normal operation of the valve.

2. Normally closed shut-off valves should not be opened for a long time to avoid spring fatigue failure.