The most notable advantage of the Groth Full Lift Type Valve compared to standard pressure / vacuum relief valves is its ability to open at 10% overpressure while standard pressure/vacuum relief valves achieve full open capacity at 100% overpressure. The use of a full lift type valve allows the user to select the valve set pressure (vacuum) within 10% of the tank Maximum Allowable Working Pressure (vacuum). This is important because operation near the tank designpressure greatly reduces the breathing losses of the product in the tank.
A Full Lift Type Valve is a relief valve which attains full stable lift at only 10% overpressure. Like all Groth pressure/vacuum relief valves, the Full Lift Type Valve is a modulating valve which offers near zero blowdown, meaning it reseats near set pressure. These performance capabilities are possible due to the harmonization of the nozzle, seating, and pallet areas such that the valve will achieve stable lift at only 10% above the set pressure / vacuum.
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