3" Plastic Air Operated Diaphragm Pump with PTFE Mebrane

Brand Name RD

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Product Description

3" Plastic Air Operated Diaphragm Pump for Dirty Water Chemical Transfer

Plastic Diaphragm Pump Working Principle:

In the two symmetrical pump chamber equipped with a diaphragm, which is connected by a center couplet stem. Compressed air comes in from pump inlet valve, and enter into one cavity, push the diaphragm movement, and gases emitted from another cavity. Once to the destination, gas distribution components will automatically compressed air into another chamber, push the diaphragm to the opposite direction, thus make two diaphragm continuous synchronization to reciprocating movement.
Compressed air goes into the valve, make the diaphragm to the right movement, and chamber suction make medium enter into, push the ball into the room, ball valve shuts down due to inhalation, Mediums discharged by extrusion, and opened the ball valve and at the same time close the ball valve, prevent back flow, thus to make medium ceaseless from the entrance inhaled, exit eduction.

Main Advantages:

1, Due to the use of air power, the flow automatically changed according to export resistance. Which is suitable for high viscosity fluid.
2, In inflammable and explosive environment, the pump is reliable and low cost, won't produce spark and not overheat,
3, The pump volume is small, easy to move, no foundation needed, convenient installation and economy. Can be used as mobile conveying pump.
4, Where there are dangers, corrosive materials processing, diaphragm pump can be separated completely with outside.
5, The pump shearing force is low, physical effect to medium is small, can be used for conveying unstable chemistry fluid.


Max Working Pressure 120 psi(0.84Mpa, 8.4bar)
Max Flow Rate 270 gpm ( 1022lpm )
Max Reciprocating Speed 135 cpm
Max Suction Height (Dry Sucking) 5m
Max Permitted Grain 0.37 in ( 9.4mm)
Max Air Consumption 180scfm(90L/s)
Air Inlet Size 3/4 in.npt(f)
Air Outlet Size 1 in.npt(f)
Fluid Inlet Size 3 in.
Fluid Outlet Size 3 in.
Net Weight PP 51 kg


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Packing & Shipping:

3" Plastic Air Operated Diaphragm Pump with PTFE Mebrane 1

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Company Information:

Shanghai Rudi Fluid Conveyor CO.,LTD is headquartered in Shanyang Town, Jinshan District of Shanghai, with 2 production bases and 3 branches in the mainland of China.

Rudi has been awarded as High-Tech Enterprise and Credit Company title in consecutive years
We have strong capability of design, innovation, precision production and tight cooperation with Shanghai universities.
The mainly products are air operated diaphragm pumps and control valves, including: Air Operated Diaphragm Pump, Electric Diaphragm Pump, Piston Pump, Powder Pump, Sanitary Pump, Air Operated Diaphragm Pump with Leakage Detector Controller, Pneumatic Diaphragm Regulating Valve, Control Valve, Sequencing Valve and so on products.


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Air Operated diaphragm pump is a new type of conveyor machinery, adopts compressed air as power source, suitable for various corrosive liquid, with particles liquid, high viscosity and volatile, inflammable, poisonous liquid. The main characteristic of this pump is no priming water needed, can pumping the medium that easy to transport. High suction head, adjustable delivery head, fire and explosion proof.


1. Q: What is MOQ?
A: 1pc for regular product. Samples are available and sample cost can be deducted from future orders.

2. Q: What's the payment?
A: D/P, T/T, Western Union , please confirm with us with exact order.

3. Q: What is the delivery time?
A: Depend on the quantity.

4. Q: What about package?
A: Cartons with foam inside & wooden case.

5. Q: How are the products delivered to us?
A: By International express.

6. Q: How long is the warranty?
A: 1 year warranty. (except wearing parts)

7. Q: Whether the products can be made of different standard?
A: Of course yes. We could produce product according to custom need.