A lifting aid is a component of a valve pallet that influences the opening and closing behavior of a valve.
The Pressure/vacuum relief valve Pressure/vacuum relief valve is an umbrella term that includes pressure or vacuum relief valve as well as pressure and vacuum relief valve. purpose is to ensure that the valve pallet Valve pallet Valve pallet is the generic term for the assembly that rests on the valve seat. releases as large a flow cross-section as possible after a small increase in pressure.