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What types of pumps does the positive displacement principle apply on?

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Question ajoutée par Rana Alnajjar , Web developer , Lebcards
Date de publication: 2013/06/17
Manish Sevlani
par Manish Sevlani , Research Analyst Chemical Speciality , Beroe

any piston pump or gear or screw pump which sucks the fluid at its on end, displaces it to other end as the cavity at feed side increases and that at the discharge side decreases.

Mohammad Aljahel
par Mohammad Aljahel , Account Manager , Baker Hughes - Saudi Arabia

Positive displacements pumps divided into two types due to operation:
1- Fixed
2- Variable
1- Fixed: *Gear Pump.
*Screw Pump.
*Vane Pump.
*Piston Pump (Radial/Axial): -Axial Piston Pump (Swash Plate/ Bent Axis)
2- Variable: *Vane Pump (Balanced / Unbalanced).
*Piston Pump (Radial/Axial): -Axial Piston Pump (Swash Plate/ Bent Axis) All mentioned pumps applies the positive displacement principle.

ahmed assem zakareia el sanan
par ahmed assem zakareia el sanan , مهندس تشغيل وصيانة , شركة رويال للكيماويات

positive displacement pump can be classified to 

1-rotary pump 

2- reciprocating pump 

type of rotary pump

1-lobe pump

2-screw pump

reciprocating pump 

1-piston pump

2-plunger pump

3-diaphram pump

 

pramod narayan
par pramod narayan , MECHANICAL OPERATION MAINTENANCE (UTILITY) SUPERVISOR , kentz and SNC lavelin engineering saudi arabia

all reciprocating and rotary gear pumps are applied positive displacement principil

حسن عبد الرحمن حسن حداد حداد
par حسن عبد الرحمن حسن حداد حداد , مدير ورشة , شركه نبته للبترول

three screw pump

kashif nazeef
par kashif nazeef , technician mechanical , oil &gas company limited (OGDCL) Pakistan

all the plunger types and piston types pumps are included

AIMAN ABDULLAH AL ALAWNEH
par AIMAN ABDULLAH AL ALAWNEH , Training Instructor, Mechanical , Adnoc Refining

it works as archimides principle The operating principle of a positive displacement pump can be demonstrated by carefully dropping a rock into a bucket of water.
Some of the water will be forced out of the bucket because the rock cannot occupy the same space as the water at the same time.
The amount of water displaced (pushed out) by the rock is equal to the volume of the rock.

John Borskey
par John Borskey

Mr. Tariq Jilani has the closest answer. Equal volume per cycle in is the same as the volume out.  This applies to plunger pumps, rotary pumps (gear, lobe, screw), plunger pumps. diaphram pumps, peristaltic pumps, just to name a few.  These types of pumps should always be operated with a pressure relief device in the system for safety!

Christiaan Koekemoer
par Christiaan Koekemoer , Site QA/QC Manager , Stefanutti Stocks Mechanical

Types of positive-displacement pumps are reciprocating, metering, and rotary pumps.

Abdullah Abdelrazek
par Abdullah Abdelrazek , Heavy Equipment Maintenance Engineer , Arabian Cement Company

Reciprocating (piston pumps...)and rotary (screw or vin) pumps are positive and application on hydraulic circuites.

tariq jilani
par tariq jilani , Assistant Manager Maintenance (Mechanical) , Byco Petroleum Pakistan former Bocicor Pakistan limited

The pump which have constant suction and discharge volume means, suction volume = discharge volume

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