Lincoln 1/2″ Aluminum Diaphragm Pump 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.
Key source specifications include Model 85631; Size: 1/2″; Air Inlet NPT (f): 1/4″; Maximum Pressure: 100psi/6,89 bar.
Key Features
- Size: 1/2″
- Air Inlet NPT (f): 1/4″
- Maximum Pressure: 100psi/6,89 bar
- Element Particle Size: 1/8″
- Application: New/Used Oil, AF
- Lincoln 1/2″ Aluminum Diaphragm Pump
Ideal For
Choose this product if you need:
- Replacement, repair, or installation work involving new oil and antifreeze
- New/Used Oil, AF
- use with new oil and antifreeze
- Systems operating within the listed pressure specifications
Not Ideal For
Not ideal for equipment outside the listed new oil and antifreeze compatibility, pressures above the listed 100psi/6,89 bar maximum, or installations requiring a different size than 1/2″.
Product Details
Review the product details below to confirm the model / mpn, size, air inlet npt (f), maximum pressure, element particle size match your equipment or lubrication system.
Shared Product Details
| Brand | Lincoln Industrial |
| Model / MPN | 85631 |
| Size | 1/2″ |
| Pump Body | Aluminum |
| Wetted or Soft Parts | Buna-N |
| Air Inlet NPT (f) | 1/4″ |
| Maximum Pressure | 100psi/6,89 bar |
| Element Particle Size | 1/8″ |
| Application | New/Used Oil, AF |
| Outlet NPT | 1/2″ |
| Free Delivery | 15 gal. |
Compatibility
For use with new oil and antifreeze:
- Pumps Viscous Materials
- Environmentally Friendly
- Runs Dry without Damage
Additional Product Information
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.
Frequently Asked Questions
What does this fit?
The original product description lists compatibility with: Pumps Viscous Materials, Environmentally Friendly, Runs Dry without Damage.
What model number should I verify?
Confirm model or manufacturer part number 85631.
What pressure is listed?
The supplied specifications list 100psi/6,89 bar.






