HNB’S Pressure & Vacuum Releaf Valve is a highly developed pressure and vacuum relief valve with excellent flow performance. Typically the valve is installed in the in- and out breathing lines of tanks, vessels and process apparatus to protect against unallowable high and low pressure. The valve prevents emission losses almost up to the set pressure and prevents air intake almost up to set vacuum. The product vapors can be discharged through a collective line connected to the line flange on the pressure side.
Benefits
Pressure / vacuum relief valves provide high flow capacity from a compact valve size
Wide range of pressure and vacuum settings to provide maximum tank protection whilst ensuring minimum gas loss
Designed and manufactured to API Std 2000 / ISO28300
Superior sealing meets the stringent demands of emission control regulations
Exceeds seat leakage requirements of API Std 2000 or ISO28300
No measurable leakage below 90% of the set pressure, less than 1 SCFH at 90% of the set pressure
Low leakage minimises evaporation loss
Economic savings due to reduced product loss
Alternative connection types available on request
Stem/pallet proximity switches available
Valve sizing service assists optimum valve performance / cost specification
Benefits