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.
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1:1 Air-operated diaphragm pump line
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Model
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Description
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Pump Body
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Wetted or
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Size
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Free delivery
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Air inlet
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Maximum Pressure
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Element particle
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Applications
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inlet
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outlet
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soft parts
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NPT
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NPT
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NPT
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size
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in.
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in.
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in.
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gal.
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liter
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in.
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psi
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bar
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in.
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mm
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85630
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1/4
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Polyprop
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PTFE
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1/4
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1/4
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4
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15.1
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1/4
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100
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6.89
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1/12
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0.79
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New oil, AF, windshield washer fluid
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85631
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1/2
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Aluminum
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Buna-N
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1/2
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1/2
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15
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56.8
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1/4
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100
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6.89
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1/8
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3.17
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New/used oil, AF
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85632
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1/2
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Aluminum
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PTFE
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1/2
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1/2
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15
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56.8
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1/4
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100
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6.89
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1/8
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3.17
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New oil, AF
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85633
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1/2
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Aluminum
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Hytrel
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1/2
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1/2
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15
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56.8
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1/4
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100
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6.89
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1/8
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3.17
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New oil
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85622
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1/2
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Polyprop
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Santoprene
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1/2
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1/2*
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14
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53
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1/4
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100
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6.89
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1/8
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3.17
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High Abrasion materials
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85623
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1/2
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Polyprop
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PTFE
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1/2
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1/2*
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14
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53
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1/4
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100
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6.89
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1/8
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3.17
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New oil, AF
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85626
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1/2
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Polyprop
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Buna-N
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1/2
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1/2*
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14
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53
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1/4
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100
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6.89
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1/8
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3.17
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New oil, AF
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85629
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1
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Aluminum
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Hytrel
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1
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1
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45
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170.3
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1/2
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125
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8.6
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1/4
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6.35
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New oil
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85628
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1
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Aluminum
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PTFE
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1
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1
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45
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170.3
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1/2
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125
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8.6
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1/4
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6.35
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New oil, AF
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85627
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1
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Aluminum
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Buna-N
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1
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1
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45
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170.3
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1/2
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125
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8.6
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1/4
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6.35
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New/used oil, AF
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85621
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1-1/2
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Aluminum
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Buna-N
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1-1/2
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1-1/2
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106
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401.3
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3/4
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125
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8.6
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1/4
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6.35
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New/used oil, AF
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85624
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2
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Aluminum
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Buna-N
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2
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2
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150
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567.8
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3/4
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125
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8.6
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1/4
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6.35
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New/used oil, AF
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*Can be converted to dual 1/2 in. outlet
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UL listed
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Model
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Description
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Pump Body
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Wetted or
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Size
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Free delivery
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Air inlet
|
Maximum Pressure
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Element particle
|
Applications
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|
inlet
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outlet
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soft parts
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NPT
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NPT
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NPT
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size
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in.
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in.
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in.
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gal.
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liter
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in.
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psi
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bar
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in.
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mm
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85634
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1 UL
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Aluminum
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Buna-N
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1
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1
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45
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170.3
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1/2
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50**
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3.45
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1/4
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6.35
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Used oil, diesel kerosene
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85635
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1 UL
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Aluminum
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PTFE
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1
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1
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45
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170.3
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1/2
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50**
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3.45
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1/4
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6.35
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Unleaded gas, diesel, kerosene used oil
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**50 psi (3.45 bar) flammable liquids, 125 psi (8.6 bar) others
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Dual inlet
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Model
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Description
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Pump Body
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Wetted or
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Size
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Free delivery
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Air inlet
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Maximum Pressure
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Element particle
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Applications
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inlet
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outlet
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soft parts
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NPT
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NPT
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NPT
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size
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in.
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in.
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in.
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gal.
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liter
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in.
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psi
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bar
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in.
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mm
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85636
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1/2
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Aluminum
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Buna-N
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1/2
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1/2
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15
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56.8
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1/4
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125
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8.6
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1/8
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3.17
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AF/ water
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85637
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1/2
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Polyprop
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Buna-N
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1/2
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1/2
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14
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53
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1/4
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100
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6.89
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1/8
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3.17
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AF/ water
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85639
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1
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Polyprop
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Buna-N
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1 ANSI ***
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–
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45
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170.3
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1/2
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100
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6.89
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1/4
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6.35
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AF/ water
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85638
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1
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Aluminum
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Buna-N
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1
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1
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42
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159
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1/2
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125
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8.6
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1/4
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6.35
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AF/ water
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*** Model 85639 requires model 275631 adapter and model 275632 seal kit for pipe thread installations.
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End_Module_1817
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