Vacuum Negative-Pressure Safety Valve

Nominal Diameter:DN15-DN250
Nominal Pressure: 1.0Mpa
Material:Stainless Steel
Medium: Nitric Acid and Acetic Acid etc.
Application: Urban construction, chemical, metallurgical, petroleum, pharmaceutical, food, beverage and environmental protection etc. 

Vacuum Negative-pressure Safety Valve (HFA72W) is applied negative pressure system with temperature ≤200℃. When the negative pressure in the container exceeds the allowable value, the valve will open automatically and absorbs air; when the negative pressure in the container reaches the allowable value, the valve will close automatically so as to protect the equipment and the system. It is to be installed in normal non-negative pressure systems. When the discharge valve of the container and system has not opened, causing the negative pressure condition, this valve will open automatically.