When down / return: If the cargo cellar is closed, the steam pressure will deform the cargo cellar. The Pressure head helps the valve exhale and the Vacuum head helps the valve to inhale. Balance the vapor pressure in the cargo cellar with the atmosphere.
When the temperature changes, rows and vapors expand as well. Valves do the same task as above.
Why need rapid breathing, high-speed breathing?
Ensure safety: When discharged at a speed of >30m / s, the fire will not be able to penetrate the cargo tunnel.
To ensure down-line and return speeds. Fast breathing valves, large flow will help to get off the line faster.
High speed breathing valves (rapid breathing valves) are regularly imported
High speed exhaust valve, used pressure balance for cargo tunnel, Model: TQF-100C, EN: HIGH VELOCITY PRESSURE VACUUM RELIEF VALVE
High speed exhaust valve, using pressure balance for cargo tunnel, Model: TQF-150C, EN: HIGH VELOCITY PRESSURE VACUUM RELIEF VALVE
High speed exhaust valve, using pressure balance for cargo tunnel, Model: TQF-80C, stainless steel casing type 304, stainless steel intestine 316, CCS certificate authorized by VR, Yatai, China, ordered 60 days