Vacuum negative pressure safety valve，safety Valve

‌ vacuum negative pressure safety valve ‌ is a kind of safety device specially used to prevent the internal pressure of the system from falling below the set value and causing equipment damage or personal injury. It can automatically open when the vacuum degree in the system is reduced to a specified value, and the air in the pipeline is discharged into the atmosphere; When the pressure returns to the normal range, the valve automatically closes and locks at a certain opening ‌

Working principle

The working principle of vacuum negative pressure safety valve is based on pressure difference. When the internal pressure of the system is below the set value, the valve will automatically open to allow air or other gases to enter the system to balance the pressure and prevent negative pressure in the system. The core components include a spring and a valve disc. When the pressure is lower than the set value, the spring overcomes the pressure of the valve disc and makes the valve disc open to realize the gas entering the system ‌

type

There are many types of vacuum negative pressure safety valves, common ones include:

‌ spring-type vacuum negative pressure safety valve ‌ : the use of spring to control the opening and closing of the valve disc, simple structure, relatively low price, suitable for general vacuum negative pressure protection.

‌ pneumatic vacuum negative pressure safety valve ‌ : the use of pneumatic actuator to control the valve disc, through the pressure to control the valve to open and close, suitable for the valve operation accuracy requirements of the occasion.

‌ electromagnetic vacuum negative pressure safety valve ‌ : use the solenoid valve to control the opening and closing of the valve disc, and control the valve action by electrical signal, suitable for remote control ‌

Application scenario

‌ chemical industry ‌ : in the process of chemical production, vacuum negative pressure safety valve can protect the reactor, distillation tower and other equipment, to prevent equipment damage or cause safety accidents because of high negative pressure ‌

‌ pharmaceutical industry ‌ : in the pharmaceutical process, vacuum negative pressure safety valve to ensure the normal operation of production equipment, to prevent the negative pressure is too high or too low and affect product quality and production safety ‌

‌ food industry ‌ : in food processing, vacuum negative pressure safety valve protects storage tanks, conveying pipelines and other equipment to prevent product quality and equipment safety from high negative pressure ‌

‌ electric power industry ‌ : in electric power equipment, vacuum negative pressure safety valve is used to protect generators, transformers and other key equipment, to prevent damage due to high negative pressure ‌

Packing of Standard Packing: 

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 442 gallon liquid totes Special package is available on request. ATTs’  is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.