Diaphragm Pump NDP Series pumps are the backbone of the industrial line of AODD pumps. A unique, patented air-valve design ensures stall-free operation throughout product life. Bolted construction and common component replaceable parts maximize uptime and increase profitability. Diaphragm Pumps 308981ZAT EN For fluid transfer applications. For professional use only. Only models marked with (.) are. Symbols Warning Symbol Caution Symbol.
A diaphragm pump (also known as a Membrane pump) is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or teflondiaphragm and suitable valves on either side of the diaphragm(check valve, butterfly valves, flap valves, or any other form of shut-off valves) to pump a fluid.
There are three main types of diaphragm pumps:
Those in which the diaphragm is sealed with one side in the fluid to be pumped, and the other in air or hydraulic fluid. The diaphragm is flexed, causing the volume of the pump chamber to increase and decrease. A pair of non-return check valves prevent reverse flow of the fluid.[1]
Those employing volumetric positive displacement where the prime mover of the diaphragm is electro-mechanical, working through a crank or geared motor drive, or purely mechanical, such as with a lever or handle. This method flexes the diaphragm through simple mechanical action, and one side of the diaphragm is open to air.[2]
Those employing one or more unsealed diaphragms with the fluid to be pumped on both sides. The diaphragm(s) again are flexed, causing the volume to change.
When the volume of a chamber of either type of pump is increased (the diaphragm moving up), the pressure decreases, and fluid is drawn into the chamber[3]. When the chamber pressure later increases from decreased volume (the diaphragm moving down), the fluid previously drawn in is forced out.[4] Finally, the diaphragm moving up once again draws fluid into the chamber, completing the cycle. This action is similar to that of the cylinder in an internal combustion engine. Diaphragm Pumps deliver a hermetic seal between the drive mechanism and the compression chamber, allowing the pump to transfer, compress, and evacuate the medium without a lubricant.
An elastomeric diaphragm can be used as a versatile dynamic seal that removes many of the limitations found with other sealing methods. They do not leak, offer little friction, and can be constructed for low pressure sensitivity. With the right material consideration, diaphragms can seal over a wide range of pressures and temperatures without needing lubrication or maintenance.
Characteristics[edit]
Diaphragm pump characteristics:
Gas Powered Diaphragm Pump
have good suction lift characteristics, some are low pressure pumps with low flow rates; others are capable of higher flow rates, dependent on the effective working diameter of the diaphragm and its stroke length. They can handle sludges and slurries with a relatively high amount of grit and solid content.
internal pump parts often within oil, suspended and isolated, to promote pump longevity
suitable for abrasive, corrosive solutions
suitable for discharge pressure up to 1,200 bar
have good dry running characteristics.
can be used to make artificial hearts.
are used to make air pumps for the filters on small fish tanks.
can be up to 97% efficient.
have good self priming capabilities.
can handle highly viscous liquids. A viscosity correction chart can be used as a tool to help prevent under-sizing AOD pumps
can pump corrosive, abrasive, toxic, and flammable liquids[6]
CFD animation of a diaphragm pump
Double acting membrane pump on oil tanker deck
Membrane pump animation
Air compressors[edit]
Small mechanically activated diaphragm pumps are also used as air compressors and as a source of low-grade vacuum. Compared to other compressors, these pumps are quiet, cheap and, most importantly, have no moving parts in the airstream. This allows them to be used without added lubrication in contact with the air, so the compressed air produced can be guaranteed clean.
References[edit]
^Mechanical diaphragm pump
^Electric diaphragm pumpArchived 2011-10-09 at the Wayback Machine
^How AODD Pumps Work: Video
^Diaphragm Pump TechnologyArchived 2014-04-07 at the Wayback Machine Air Dimensions, Inc. August 04, 2011.
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Diaphragm_pump&oldid=964664922'
Pre-drawn P&ID pump symbols include pump, air-operated diaphragm, centrifugal pump, chemical pump, etc. These vector symbols will help you develop accurate and high-quality P&IDs.
From the P&ID pump symbols library in Edraw P&ID Software, you will gain a great range of high-quality P&ID pump symbols. These symbols are great resources when you create piping and instrumentation diagrams. Here you will have a general overview of the symbols on how they look and how to use them in diagrams.
EdrawMax: a swiss knife for all your diagramming need
Effortlessly create over 280 types of diagrams.
Provide various templates & symbols to match your needs.
Drag and drop interface and easy to use.
Customize every detail by using smart and dynamic toolkits.
Compatible with a variety of file formats, such as MS Office, Visio, PDF, etc.
Feel free to export, print, and share your diagrams.
Pump Symbols
Air Diaphragm Pump
A great diversity of pump symbols are included in Edraw library for different purposes and themes. You will find the ordinary pump, air powered pump, air-operated diaphragm, centrifugal pump, chemical pump, classic pump, cool pump, diaphragm pump, flanged pump, high volume pump, horizontal pump, mag drive pump, oil pump, vacuum pump, vertical pump, raw water pump, plunger pump, etc. To know more about using symbols, you can read this guide and learn how to design a P&ID. Picasa 3 software download.
Pump is a device for raising, compressing, or transferring fluids.
Centrifugal Pump is a pump having a high-speed rotating impeller whose blades throw the water outwards.
Chemical Pump is a skid-mounted pumping unit used to feed chemicals into the power oil to reduce corrosion in the system and to assist in water removal when the power oil and well-produced oil reach the ground-level wash tank.
Diaphragm Pump is a pump which uses a diaphragm to isolate the operating parts from pumped liquid in a mechanically actuated diaphragm pump, or from hydraulic fluid in a hydraulically actuated diaphragm pump.
Vacuum Pump is a compressor for exhausting air and non-condensable gases from a space that is to be maintained at subatmospheric pressure.
How to Use Pump Symbols
Where to get the symbols?
Start Edraw, choose Industrial Automation category, and double click Utility-Generation P&ID template to start a new drawing page. The pump symbol library will open automatically on the left of the canvas together with some other libraries.
If your Edraw is already open, you can also click the library button on the top left corner, and navigate Industrial Automation->PID Pumps.
Drag and Drop Symbols
When you successfully get access to the symbols, now you can drag and drop required symbols onto the canvas.
Change the size of the symbol
You are allowed to scale the shape to any size without loss of the display resolution. There is no blur image anymore.
Change the color of symbols
Symbol For Diaphragm Pump For Pfd
It's easy to change filling colors to better fit your own theme.
Tips: If you want to change the filling color for a part of a shape, first you need to select the sub shape. Click on the sub shape you want to change color for a few times until you successfully select it (there will be a blue selection frame), then you can change this sub shape with a new color, and with other parts unchanged. Or you can ungroup the shape first (go to Home menu, and click Ungroup button), and you can change the color for any sub shape freely.
Separate Shape Components
You are able to pull out the drawing components to create new symbols. M4a player. To do this, first you need to click Ungroup button to ungroup the shape under Home menu.
Symbol For Vacuum Pump
Using Pump Symbols to Design P&IDs
Electric Diaphragm Pump
The samples below are created using Edraw P&ID pump symbols. You can discover more P&ID examples, and learn how to use the symbols effectively. With our pre-defined P&ID symbols, there will be no difficulty for users to create professional-looking piping and instrumentation diagrams and process flow diagrams.