ARO 650943-343-B Hydraulic Piston Pump, 2040 psi

ARO's 650943-343-B pairs a hydraulic motor with a 66300-XXX lower pump end to build high fluid pressure at low flow. Output pressure ranges from 85 to 2040 psi (5.9 to 140.7 bar), while flow peaks at 3.1 gpm (11.7 lpm). Inlet and outlet are both 1 in NPTF.

The piston rod is sealed with PTFE packings, and the pump is rated for fluid temperatures up to 130°F (54.4°C). It runs on a 6 in stroke with a 1.7:1 turndown ratio. A piston pump displaces a set volume on every stroke, which is why this design can keep building pressure against a closed or restricted outlet up to its rated limit. Lower end packings and seals are renewed with repair kit 637305-X43.

Key Specifications

• Fluid pressure range: 85 - 2040 psi (5.9 - 140.7 bar)
• Max flow: 3.1 gpm (11.7 lpm)
• Ports: 1 in NPTF inlet and outlet
• Packing material: PTFE
• Max temperature: 130°F (54.4°C)
• Drive and stroke: hydraulic motor, 6 in

Typical Applications

• Feeding fluids through long hoses or restrictive dispense valves
• High-pressure supply where a hydraulic circuit is already on hand
• Low-volume, high-pressure transfer at ambient temperatures
• Installations where air-driven pumps cannot reach the needed pressure

Service Parts for This Pump

Two items are listed for the 650943-343-B. Quote the full model code when ordering anything for the lower end.

• ARO 67069 adapter kit
• ARO 66333-B Wet-Sol, quart

For wear parts inside the lower end, use the 637305-X43 repair kit with the material code that matches your unit. Refer to the Operator's Manual for service instructions.