positive displacement

A screw pump is a special type of positive displacement pumps that has two or more intermeshing screws rotating axially to deliver fluids.

They consist of a rotating fan, or impeller, and seldom are of the positive displacement type that uses gears or plungers.

Refrigerating systems and heat pumps - Safety and environmental requirements - Positive displacement refrigerant compressors.

For positive displacement pumps a pressure relief by-pass line including a time-controlled valve with slow action is recommended.

Twin-screw pump as a positive displacement pump, pump room exhaust inhalation chamber should be strictly separated.

Positive displacement motor is widely used in sidetrack drilling inside casing because of its excellent dynamic characteristic.

Reciprocating positive displacement pumps and pumps units - Technical requirements.

Most downhole power drills for horizontal drilling are constituted basically by positive displacement drills .

Positive displacement piston pumps use a piston to force material through a needle.

the pressure sensors, the controllable positive displacement pump and the power unit are all connected with the control device.

When the absorption is weak, the lateral shift for the composites with positive refraction will exhibit a positive displacement.

In this paper, a new type positive displacement compressor and expander is advanced. Its mathematical model is established.

Petroleum and natural gas industries - Rotary-type positive displacement compressors - Part 1 : process compressors (oil-free).

Petroleum and natural gas industries - Rotary-type positive-displacement compressors - Part 2 : packaged air compressors (oil-free).

There are two basic types of superchargers , positive displacement and centrifugal.

Slurry is metered to the tine by a positive displacement pump.

The roots is the oldest type of positive displacement supercharger.

In this paper, a new type positive displacement compressor is advanced.

What is a positive displacement piston pump?

Hydraulic Fluid Power - Positive Displacement Pumps, Motors, and Integral Transmissions - Determination of Steady-State Performance

Turbomachinery: turbines, variable and positive displacement compressors;

Variable Capacity Positive Displacement Refrigerant Compressors and Compressor Units for Air-Conditioning and Heat Pump Applications

Positive Displacement Refrigerant Compressors, Compressor Units, and Condensing Units

Petroleum and natural gas industries - Rotary-type positive-displacement compressors - Process compressors (oil-free)

Petroleum and natural gas industries - Rotary-type positive-displacement compressors - Packaged air compressors (oil-free)

Failure and Control of a Corrugated-tube Positive-displacement Heat Exchanger

Hydraulic Fluid Power - Positive Displacement Pumps and Motors - Dimensions and Identification Code for Mounting Flanges and Shaft Ends

Reciprocating positive displacement pumps and pump units; specifications; data sheet information

rotary type positive displacement compressors for petroleum , petrochemical and natural gas industries

positive-displacement oil-sealed rotary vacuum pumps-measurement of performance characteristics

Hydraulic reciprocating positive displacement pumps

Pneumatic reciprocating positive displacement pumps

Electric reciprocating positive displacement pumps

Hydraulic fluid power; positive displacement pumps and motors; determination of derived capacity

Methods of Testing for Rating Positive Displacement Refrigerant Compressors and Condensing Units

Standard Specification for Rotary Positive Displacement Distillate Fuel Pumps

Positive-displacement vacuum pumps; measurement of performance characteristics; part 2: measurement of ultimate pressure

Positive displacement using piecewise integration

Configuration Applications Positive-Displacement Gas Water Heaters and Hot Water Storage Tanks

Rotary positive displacement pumps - Performance tests for acceptance

The methods of performance test for positive displacement refrigerant compressors

Methods of determining the derived capacity of hydraulic fluid power positive displacement pumps and motors

Multi-stage Polytropic Positive Displacement Compressor

Positive displacement pumps and motors - Determination of derived capacity

Dynamic measurement of crude oil--Operating stipulations of verificating positive displacement meters by pipe prover

Discussions on structure types of positive displacement pump

Rotary piston type positive displacement flowmeter

Lectotype and Application of Positive Displacement Flow Meter

Rotary vane type positive displacement flowmeter

positive-displacement oil-sealed rotary oil vacuum pumps

returning the low void volume positive displacement pipette from the one or more lubricant blend containers to the additive reservoir;

bit with positive displacement motor

Superficial analysis on quality of main positive displacement pumps in China