PARKER – HERL Constant Pressure Expansion Valve ( PDA)

PARKER – HERL Constant Pressure Expansion Valve ( PDA) The PDA-1-0/ 80 constant pressure or automatic expansion valve is a downstream pressure regulating device that is applicable on ammonia ( R-717) systems. The valve regulates the mass flow rate of refrigerant to maintain downstream pressure at a constant value. The normal Application n of this valve is to feed liquid refrigerant to an evaporator with a relatively constant heat load. However, the PDA-1-0/ 80 can be used to maintain a constant downstream pressure on other applicationsas well. Specifications The PDA-1-0/ 80 embodies the same design and construction details as the type D thermostatic expansion valve. However, the valve utilizes an element with an adjustable spring assembly in place of the thermostatic element. Also, a non-adjustable bottom cap replaces the external superheat adjustment. The adjustment range is 0 to 80 psig with a standard setting of 60 psig. Contact telp: + 62 858 9038 2651, email diantamasukses( at) gmail.com and brazedplate( at) gmail.com