This pump is in great condition. It is worth approx $14,000 new.

ARO pumps feature stall resistant design, modular air motor / fluid sections.
Air operated double diaphragm pumps utilize a pressure differential in the air chambers to alternately create suction and a positive fluid pressure in the fluid chambers, valve checks insure a positive flow of fluid.

Pump cycling will begin as air pressure is applied and will continue to pump and keep up with the demand. It will build and maintain line pressure and will stop cycling once maximum line pressure is reached (dispensing device closed) and will resume pumping as needed.

Make: ARO
Model: 666321-244-C

SPECS

Maximum Air Inlet Pressure: 120 psig (8.3 bar)
Maximum Material Inlet Pressure: 10 psig (0.69 bar)
Maximum Outlet Pressure: 120 psig (8.3 bar)
Maximum Flow Rate (flooded inlet): 897.0 lpm
Maximum Particle Size: 9.5 mm

Max Temperature: 4 to 107C
Noise Level (@70 psig): 86.3db

Materials -
Center Body Material/Fluid Connection: Aluminium / Rp 3
Fluid Cap & Manifold Material: Stainless Steel
Seat Material: 316 Stainless Steel
Ball Material: PTFE
Diaphragm Material: PTFE

Weight: 100kg
Overall Dimensions (mm): 385 x 510 x 685