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Venturi (low pressure drop) dis-tributor has a machined, contoured throat on the approach side with diverg- ing circuit holes beyond the smallest section of the throat. There is no sepa- rate nozzle; therefore the pressure drop is less than the sharp-edged orifice dis-tributor. The throat size is determined by the number and size of the circuits and cannot be altered.Nozzles for orifice type distributors for various suction temperatures in °F and refrigerants are listed in the tables start- ing on page 6. These numbers determine the hole size.
Catalog OEM-3, Distributors and Flow Controls / Page 3

Distributors and Flow Controls - OEM - 60883 Refrigerant Distributors

nozzle type distributor has a permanent or replaceable sharp-edged orifice to mix the two-phase fluid before it enters the coil circuit passageways. By changing nozzles with different orifice sizes, one body type may be used for various refrigerants, loads, and also for different numbers of circuit sizes.The Refrigerant distributors are of two ba-sic designs, each having certain merits that the design engineer may regard as best for the application. Parker produces both basic types with the largest range of sizes, variations and specials of any manufacturer. (Distributors are made of brass unless aluminum is specified.)The

Venturi DistributorNozzle Type Distributor