Air-Operated Diaphragm Pumps
Air-operated double diaphragm (AODD) pumps take the lifting and pouring out of parts washer maintenance. Fill your washer from a 55-gallon drum, drain spent solvent for recycling or disposal, empty aqueous wash and rinse tanks, and move coolant or chemicals, all on shop air with no electric motor.
We carry the Samoa PIVOT series in 3/8″, 1/2″ and 1″, in aluminum, 316 stainless steel, polypropylene, conductive acetal and PVDF, with PTFE or Santoprene diaphragms. Samoa’s patented PIVOT air valve passes wet, dirty shop air instead of stalling, and the pumps match the footprint of comparable Graco, ARO and Wilden models.
Replacing a Graco Husky, ARO, Wilden or Yamada pump? See our diaphragm pump cross-reference to find the Samoa PIVOT model that matches your old pump’s size and flow.
Showing all 4 results
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Samoa CP10 1″ Compact Air-Operated Diaphragm Pump
Price range: $1,248.00 through $1,554.00 -
Samoa PIVOT UP03 3/8″ Air-Operated Diaphragm Pump – 8.2 GPM
Price range: $511.00 through $1,071.00 -
Samoa PIVOT UP05 1/2″ Air-Operated Diaphragm Pump – 14.3 GPM
Price range: $870.00 through $2,432.00 -
Samoa PIVOT UP10 1″ Air-Operated Diaphragm Pump – 53 GPM
Price range: $1,450.00 through $4,588.00
Diaphragm pump sizing
| Pump | Max flow | Best for |
|---|---|---|
| 3/8″ UP03 | 8.2 GPM | Pails, small tanks, chemical metering |
| 1/2″ UP05 | 14.3 GPM | 55-gallon drums, parts washer fill and drain |
| 1″ UP10 / CP10 | up to 53 GPM | Totes, large wash and rinse tanks, sludge |
Choosing pump materials
| Fluid | Choose |
|---|---|
| Mineral spirits, parts washer solvent, acetone, thinner | Aluminum, stainless or conductive acetal + PTFE (grounded) |
| Aqueous detergent, rinse water, coolant | Polypropylene + Santoprene |
| Acids, caustics, plating chemistry | Polypropylene or PVDF + PTFE |
Looking for the recirculating pump inside your sink-style washer? See parts washer pumps. Need help choosing? Tell us what you’re pumping.
How the PIVOT air motor works
Samoa’s patented pivot-shaft air valve has one moving part and passes wet, dirty shop air instead of stalling. Here’s how it works, and how quickly the air motor can be serviced.
Diaphragm pump FAQ
Why use an air-operated diaphragm pump with a parts washer?
It moves solvent or wash solution between drums and the washer without lifting or pouring. It runs on shop air with no electric motor, so it is the usual choice for mineral spirits and other flammable parts washer solvents.
Which pump material do I need for parts washer solvent?
For mineral spirits and other hydrocarbon solvents, choose aluminum, stainless steel or conductive acetal with PTFE diaphragms, and ground the pump. For aqueous detergents and rinse water, polypropylene with Santoprene diaphragms is the economical choice.
What size diaphragm pump do I need?
A 3/8 inch pump (about 8 GPM) suits pails and small tanks. A 1/2 inch pump (about 14 GPM) handles most 55-gallon drum transfer and parts washer fill and drain. Choose a 1 inch pump (about 53 GPM) for totes, large wash tanks and sludge.
Can a diaphragm pump run dry?
Yes. Air-operated diaphragm pumps self-prime, can run dry and can be dead-headed against a closed valve without damage.