Enumeration defining the typical types of compressors.
7.5.2.8.2 Type values
Type
Description
BOOSTER
Positive-displacement reciprocating compressor where pressure is increased by a booster.
DYNAMIC
The pressure of refrigerant vapor is increased by a continuous transfer of angular momentum from a rotating member to the vapor followed by conversion of this momentum into static pressure.
HERMETIC
Positive-displacement reciprocating compressor where the motor and compressor are contained within the same housing, with the motor shaft integral with the compressor crankshaft and the motor in contact with refrigerant.
OPENTYPE
Positive-displacement reciprocating compressor where the shaft extends through a seal in the crankcase for an external drive.
RECIPROCATING
Positive-displacement compressor using a piston driven by a connecting rod from a crankshaft.
ROLLINGPISTON
Positive-displacement rotary compressor using a roller mounted on the eccentric of a shaft with a single vane in the nonrotating cylindrical housing.
ROTARY
Positive-displacement compressor using a roller or rotor device.
ROTARYVANE
Positive-displacement rotary compressor using a roller mounted on the eccentric of a shaft with multiple vanes in the nontotating cylindrical housing.
SCROLL
Positive-displacement compressor using two inter-fitting, spiral-shaped scroll members.
SEMIHERMETIC
Positive-displacement reciprocating compressor where the hermetic compressors use bolted construction amenable to field repair.
SINGLESCREW
Positive-displacement rotary compressor using a single cylindrical main rotor that works with a pair of gate rotors.
SINGLESTAGE
Positive-displacement reciprocating compressor where vapor is compressed in a single stage.
TROCHOIDAL
Positive-displacement compressor using a rolling motion of one circle outside or inside the circumference of a basic circle and produce either epitrochoids or hypotrochoids.
TWINSCREW
Positive-displacement rotary compressor using two mating helically grooved rotors, male (lobes) and female (flutes) in a stationary housing with inlet and outlet gas ports.
WELDEDSHELLHERMETIC
Positive-displacement reciprocating compressor where the motor compressor is mounted inside a steel shell, which, in turn is sealed by welding.