Samson Corporation 535581 PM35 5:1 Universal Stub Pump wo/Bung Adaptor
- Part #:535581
- Model #:PumpMaster35
- Condition:Brand New

Double-acting, air-operated, medium pressure, heavy-duty oil pumps for dispensing lubricants in medium to large size installations, which may include simultaneous dispense points. Pumps include a height adjustable 2" bung adaptor for drum and tank mounting. Built in port for optional pressure relief valve (609 007).
Features:
- 3-1/4" air motor. Pneumatically actuated air valve with only three moving parts and no springs. Large effective area for maximum pumping power
- Efficient internal air exhaust. Prevents icing, which can stall pump operation
- Double acting pump. Provides even and smooth fluid flow
- Long life packings. Dual packing seals provide trouble-free operation
- Built-in port for connecting a pressure relief valve. Positive relief of overpressure caused by oil thermal expansion using an optional, inexpensive, pressure relief valve (609 007)
Fluids Handled:
- Synthetic and mineral based oil
- Transmission fluid
- Hydraulic oil
- Gear Lube
Markets Served:
- Fleet Service Facilities
- Auto and Truck Dealers
- Lube Trucks
- Mining and Construction
- Railroad and Mass Transit
- Marine
- Industrial

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Pump Pressure Ratio | 5:1 |
Air Pressure Operating Range | 30-175 psi (2-12 bar) |
Air Consumption | 12.4 scfm (350 NL/min) Air consumption with 72 psi (5 bar) air inlet pressure and 80 cycles per minute. |
Maximum Fluid Outlet Pressure | 875 psi (60 bar) |
Air Motor Effective Diameter | 3.25" (80 mm) |
Air Motor Stroke | 3.15" (80 mm) |
Delivery at 80 cpm | 3.2 gpm (12 l/min) |
Maximum Free Flow Delivery | 8 gpm (30 l/min) |
Air inlet | 3/8" NPT(F) |
Fluid inlet | 1 1/2" NPT(F) |
Fluid outlet | 1/2" NPT(F) |
Wetted Materials | Aluminum / Hard Chromed Steel / Steel / Polyurethane / NBR |
Noise Level | Pump noise level meets OSHA requirements at all recommended operating air pressures |
Overall Length | 18 1/2" (469) |
Weight | 11.7 lb |
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