2" Air Operated Double Diaphragm Pump, 100 GPM

4.8 out of 5 based on 7 reviews | Write a review

$849.99

Factory price industrial pneumatic double diaphragm pump for sale, 2 inch fluid inlet and outlet, 1/2 inch air inlet, max. suction lift 18 ft., air consumption 32 SCFM, max. working pressure up to 120 PSI, selectable body material of stainless steel or aluminum alloy and non-metallic.

Medium Contact Material *
Diaphragm Material *
Connection Type *

SKU: ATO-AODD-50

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Delivery date: 6-12 days

Overview
Proposition 65 Warning

Air operated double diaphragm pump is a pneumatic device that can pump a variety of toxic, flammable, volatile liquid, slurry, high viscosity fluids, corrosive liquids and paint. It also can be used for cleaning sediment contaminant in shaft, tunnels and sewers.

Features

Pneumatic dual diaphragm pump can transport high temperature media up to 130 ℃.
Adopt pilot operated type air valve to eliminate the AODD pump downtime and extend its life span.
It is designed with multiport to help you install it easily.
Air powered diaphragm pump can be used as a movable-type material transfer pump because it has such advantages as small in size, easy moving, no need base, small occupied area and easy installation.
It can be externally connected to an electromagnetic valve for remote control. And the reversing valve requires no lubrication.

Specification

Model	ATO-QBYK3-50
Max. Flow	100 GPM (387.5 LPM)
Max. Working Pressure	120 PSI (0.84 Mpa)
Fluid Inlet Size	Cast Steel/Aluminum Alloy/Stainless Steel: 2 inch (DN50) NPT, Non-Metallic (Plastic): DN50 Flange or DN50 Flange+2" NPT Adapter
Fluid Outlet Size	Cast Steel/Aluminum Alloy/Stainless Steel: 2 inch (DN50) NPT, Non-Metallic (Plastic): DN50 Flange or DN50 Flange+2" NPT Adapter
Air Inlet Size	1/2 inch NPT
Max. Suction Lift (Dry Suction)	18 ft. (5.48m)
Max. Permitted Grain	3/16 in. (4.8mm)
Max. Air Consumption	32 SCFM
Every Stroke Flow	0.5 gal. (1.9L)
Max. Reciprocating Speed	276 cpm
Body Structure Material	Cast Iron/Aluminum Alloy/Stainless Steel/Non-Metallic (Plastic)
Diaphragm Material	Butyronitrile (Default)/ Teflon (Customizable)
Weight	28kg/ 16kg/ 28kg/ 14kg

Dimensions (Unit: mm)

Dimension of 2 inch Air Operated Double Diaphragm Pump

Air Consumption Diagram

Air Consumption Diagram of 2 inch Air Operated Double Diaphragm Pump

Fluid Flow Diagram

Fluid Flow Diagram of 2 inch Air Operated Double Diaphragm Pump

Details

Details of 2 inch Air Operated Double Diaphragm Pump

1	Discharge outlet (top cover)	11	Sliding plate	21	Air valve chamber gasket
2	Sealing ball	12	Sliding plate gasket	22	Air valve chamber
3	Sealing seat	13	Plug	23	Muffler
4	Air valve cover gasket	14	Air valve chamber cover	24	Pitman shaft sleeve
5	Large slider aluminum piece	15	Auxiliary shaft cover	25	Colum
6	Piston	16	Auxiliary shaft O-ring	26	Outer clamp
7	V-Ring	17	Auxiliary shaft	27	PTFE diaphragm
8	Small slider	18	Pitman shaft	28	Poly rubber diaphragm
9	Large slider O-ring	19	V-Ring	29	Inner clamp
10	Large slider plastic ring	20	Piston sleeve	30	Baffle
10	Large slider plastic ring	20	Piston sleeve	31	Feed inlet (bottom cover)

Applications

Applications of Air Operated Double Diaphragm Pump

Tips: Air powered double diaphragm pump troubleshooting

The pneumatic diaphragm pump cannot start or moves slowly.

Check whether the filter, pressure regulating and lubricating device and the air inlet filter are blocked.
Check the spindle and "O" ring for scratches, abrasions and flattening marks, and replace them if they are damaged.

The pump is running but the flow is too low

Check the pump body for cavitation spots and adjust the inlet pressure of the compressed air. Reduce the running speed of the pump body to adjust the viscosity and concentration of the liquid.
Check whether the valve ball is stuck. If the conveyed liquid does not match the material of the valve ball. The valve ball will expand. Please replace the ball and seat with a suitable material.
Please check whether the inlet pipe is blocked.

There are a lot of bubbles in the outlet liquid

Please check whether the diaphragm is broken.
Check if the pump body and pipeline are leaking.

Liquid leaks from the outlet of the gas chamber

Please check whether the diaphragm is broken.
Check whether the diaphragm is correctly installed and locked.

Import and export leakage.

The screw is not tightened
the ball seat is deformed or the O-ring is damaged
The pump casings at both ends are not inclined to the upper hole position, causing the two discharge ports or feed ports to not be on the same plane.

*WARNING: This product can expose you to chemicals, including lead, which is known to the State of California to cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.

Existing reviews of 2" Air Operated Double Diaphragm Pump, 100 GPM

Regarding air consumption

I recently purchased an ATO-AODD-50 pump. I checked the product manual and found that its maximum air consumption is nominally 32 SCFM, but the air consumption chart shows that to achieve a maximum flow rate of 100 GPM, an air consumption of 60 SCFM is required. Where did I misunderstand?

From: Rossi | Date: 18/03/2026