The HBE Anti-Flash Valve is provided specifically to eliminate damage to the automatic recirculation valve and bypass piping due to flashing or cavitation.

The Anti-Flash valve functions as a variable orifice to assure the pressure of the downstream liquid does not fall below the vapor pressure of the fluid.

Applications which require Anti-Flash valves include boiler feed or condensate pumps which bypass back to a low or negative pressure condenser. Another need for Anti-Flash valves occurs on boiler feed pumps returning to the deaerator in peaking units. Recirculation valves in peaking units can run in a modulating state for extended periods of time with the bypass partially open. Due to the lack of piping friction, the temperature rise across the pump/valve can result in a flashing/cavitation condition.

The Anti-Flash valve is sized to produce a minimum of 30 PSIA above the vapor pressure.

Installation of the Anti-Flash valve is between flanges of the bypass piping size and ANSI rating. Installed adjacent to the condenser or deaerator tank will assure protection of the entire bypass system.

The MSO provides pressure reduction for applications which require more than a simple plate orifice.
The HBE MSO works by directing the fluid into a vortex flow and breaks down the pressure across several stages. The fluid passes through a multiple hole flow straightener upon exiting the orifice, which directs the fluid in a laminar direction downstream of the orifice. During pressure reduction the fluid is always above its vapor pressure, preventing destructive cavitation and flashing forces.

The MSO can be used for many high pressure reduction/small plow requirements. Specific examples include centrifugal pump minimum flow protection, warm up lines, strainer blow down, and control valve bypass.