Air-Operated Diaphragm Pumps

To Order Call:
216.749.5100216.749.5100

1/4″ – 2″ Air-Operated Pumps

Basic Design Features

Diaphragm pumps are driven by compressed air. The directional air distribution valve and pilot valve—the “air end”—are located in the center section of the pump. Liquid moves through two manifolds and outer chambers of the pump—the “wet end”. Generally, check valves are located at the top and bottom of each outer chamber or on a common manifold. The two outer chambers are connected by suction and discharge manifolds. Lincoln’s double diaphragm self-priming design offers many advances over other pumps.

1:1 Air-operated diaphragm pump line

Model

Description

Pump Body

Wetted or

Size

Free delivery

Air inlet

Maximum Pressure

Element particle

Applications

inlet 

outlet

 

 

 

soft parts 

 NPT

NPT

NPT 

size 

 

 

 in.

 

 

in. 

in.

  gal.   

liter

in.

psi

bar

in.

mm

 

85630

1/4

Polyprop

PTFE

1/4

1/4

4

15.1

1/4

100

6.89

1/12

0.79

New oil, AF, windshield washer fluid

85631 

1/2

Aluminum

Buna-N

1/2

1/2

15

56.8

1/4

100

6.89

1/8

3.17

New/used oil, AF

85632

1/2

Aluminum

PTFE

1/2

1/2

15

56.8

1/4

100

6.89

1/8

3.17

New oil, AF

85633

1/2

Aluminum

Hytrel

1/2

1/2

15

56.8

1/4

100

6.89

1/8

3.17

New oil

85622

1/2

Polyprop

Santoprene

1/2

1/2*

14

53

1/4

100

6.89

1/8

3.17

High Abrasion materials

85623

1/2

Polyprop

PTFE

1/2

1/2*

14

53

1/4

100

6.89

1/8

3.17

New oil, AF

85626

1/2

Polyprop

Buna-N

1/2

1/2*

14

53

1/4

100

6.89

1/8

3.17

New oil, AF

85629

1

Aluminum

Hytrel

1

45

170.3

1/2

125

8.6

1/4

6.35

New oil

85628

1

Aluminum

PTFE

1

1

45

170.3

1/2

125

8.6

1/4

6.35

New oil, AF

85627

1

Aluminum

Buna-N

1

1

45

170.3

1/2

 125 

8.6

1/4

6.35

New/used oil, AF

85621

1-1/2

Aluminum

Buna-N

1-1/2

1-1/2

106

401.3

3/4

125

8.6

1/4

6.35

 New/used oil, AF 

85624 

2

Aluminum

Buna-N

2

2

150

567.8

3/4

125

8.6

1/4

6.35

 New/used oil, AF 

 *Can be converted to dual 1/2 in. outlet

UL listed

Model

Description

Pump Body

Wetted or

Size

Free delivery

Air inlet

Maximum Pressure

Element particle

Applications

 inlet

outlet

 

 

 

soft parts 

 NPT

NPT

NPT 

size

 

 

 in.

 

 

in. 

in.

  gal.   

liter

in.

psi

bar

in.

mm

 

85634

1 UL

Aluminum

Buna-N

1

1

45

170.3

1/2

50**

3.45

1/4

6.35

Used oil, diesel kerosene

85635 

1 UL

Aluminum

PTFE

1

1

45

170.3

1/2

50**

3.45

1/4

6.35

Unleaded gas, diesel, kerosene used oil

 **50 psi (3.45 bar) flammable liquids, 125 psi (8.6 bar) others

Dual inlet

Model

Description

Pump Body

Wetted or

Size

Free delivery

Air inlet

Maximum Pressure

Element particle

Applications

inlet 

outlet

 

 

 

soft parts 

 NPT

NPT

NPT 

size

 

 

 in.

 

 

in. 

in.

  gal.   

liter

in.

psi

bar

in.

mm

 

85636

1/2

Aluminum

Buna-N

1/2

1/2

15

56.8

1/4

125

8.6

1/8

3.17

AF/ water

85637 

1/2

Polyprop

Buna-N

1/2

1/2

14

53

1/4

100

6.89

1/8

3.17

AF/ water

85639

1

Polyprop

Buna-N

1 ANSI ***

45

170.3

1/2

100

6.89

1/4

6.35

AF/ water

85638

1

Aluminum

Buna-N

1

1

42

159

1/2

125

8.6

1/4

6.35

AF/ water

 *** Model 85639 requires model 275631 adapter and model 275632 seal kit for pipe thread installations.

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