Detailed Product Description

Vacuum negative-pressure safety valve
Model: HFA72W;
Diameter: 15~250mm
Medium: Nitric acid, Acetic acid etc.
Pressure: -0.01MPa~0.1MPa
Applicable Temperature: ¡Ü200¡ãC
Body Materials: Cast stainless steel (1Cr18Ni9Ti / 1Cr18Ni12Mo2Ti)
Applicable Industry: Urban
 Construction,Chemical,metallurgy,Oil,Pharmaceutical,Food,Beverage,Environmental protection

 HFA72W is applicable in negative pressure sys-tem with temperature ¡Ü200℃. 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
 au-somatically 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,
 which pro-dukes the negative pressure, this valve will open automatically.