Discussion on pneumatic emergency shut-off valves and solenoid valves
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Haiyou: I would like to ask that when purchasing a pneumatic emergency shut-off valve, is the solenoid valve purchased together as part of the set? Should the solenoid valve be included when purchasing the emergency shut-off valve? Is the selection of the solenoid valve size influenced by the size of the emergency shut-off valve’s valve body? Is there a pipe connected to the vent port of the solenoid valve? If there are no pipes, how can a pipe be connected at the outlet?
Whether the solenoid valve is included or not, it’s still you who has to pay for it; you can negotiate this with the manufacturer. The function of a solenoid valve is to control the on and off flow of air; it depends on your specific needs, and factors such as reliability and diameter must be taken into consideration. As for venting, there isn’t much emission either; we don’t use pipes here either.
You can’t use a pneumatic emergency shut-off valve without a solenoid valve. You can provide the equipment supplier with the brand of the solenoid valve as well as the required explosion protection rating; they will then help you choose the right one and provide a quote. So you don’t need to worry about this issue. Additionally, the vent port of solenoid valves generally does not require an additional pipe; of course, if your operating conditions demand it, one can be connected as well – it’s no problem
It seems there isn’t any drain pipe for the solenoid valve
The solenoid valve is a challenge; from the outside, it’s not possible to tell whether it is actually turned on
Solenoids are primarily used to switch gas paths; they serve a signaling function and have nothing to do with the size of the valve core. For specific brand information, you can contact the supplier. Why is a pipe needed at the exhaust port? No wind allowed at the site? Answering questions
Solenoids are primarily used to switch gas paths; they serve a signaling function and have nothing to do with the size of the valve core. For specific brand information, you can contact the supplier. Why is a pipe needed at the exhaust port? No wind allowed at the site? Answering questions
They are usually supplied as a set, connected together
They are usually provided as a set, but they must be reliable.
Product Name and Model: QDQ421F-25C Pneumatic Cut-Off Valve for Liquid Ammonia – Emergency Cut-Off Valve for Liquid Ammonia. Product Overview: The pneumatic cut-off valve for liquid ammonia features excellent technical performance, low pressure loss, and high reliability. It is installed in pipelines for liquid ammonia, liquefied petroleum gas, gas, or other gases, and is used in conjunction with a remote air supply source. The air supply is utilized to control the opening and closing of the valve; this allows for rapid pressure relief through solenoid valves or manually, in the event of a leak or even a fire in the pipeline or storage tank. When the temperature reaches 75%%p5C%%D, the fusible alloy melts, causing the cylinder to automatically relieve pressure and the valve to close quickly, thereby preventing leaks and providing safety protection. Widely used in safety facilities for chemical hazardous material pipelines, gas supply network systems, gas thermal energy plant workshops, gas boiler rooms, and residential homes. Product features of pneumatic emergency shut-off valves: Liquid ammonia pneumatic emergency shut-off valves. These valves are a type of actuator used in automation systems; they consist of a multi-spring pneumatic diaphragm actuator or a floating piston actuator together with a control valve. They receive signals from control instruments and are used to control the shutdown, activation, or switching of fluids in process pipelines. It features a simple structure, high sensitivity, and reliable operation. It can be widely applied in industrial production sectors such as petroleum, chemicals, and metallurgy. The air source required for pneumatic emergency shut-off valves is filtered compressed air, and the medium flowing through the valve body should be a liquid or gas free of impurities and particles. Product performance specifications for liquid ammonia shut-off valves: Pressure rating: 2.5/4.0 Mpa. Working pressure of the cylinder: ≤2.0 Mpa. Operating temperature: -40~+80°C. Medium used in the cylinder: nitrogen or anhydrous air. Media that can be used: natural gas, liquefied gas, liquid ammonia. Time to reach closure state at ±70°C: ≤5 seconds. Opening pressure of the cylinder ； ≥0.3-0.6Mpa Valve body material: cast steel, stainless steel. 304, 316, 316L springs: 50CrVA (spring steel); Cylinder and piston: ductile iron; Seals, O-rings: polytetrafluoroethylene, nitrile rubber; Type: normally open, normally closed