A compact, axial-piston, variable-displacement pump, specially designed for high-pressure pumping of urethane polyol and isocyanate, is newly available from Bosch Rexroth Corp., Lehigh Valley, Pa.
A compact, axial-piston, variable-displacement pump, specially designed for high-pressure pumping of urethane polyol and isocyanate, is newly available from Bosch Rexroth Corp., Lehigh Valley, Pa. The A7KV pump is more compact than its predecessor yet maintains the same flange dimensions, drive shaft, and functions to make replacement easier. The pump’s feed channel is separated from the drive work chamber to allow high-pressure filling of highly viscous fluids. It provides outlet pressures up to 3635 psi (4500 psi peak). Pump displacement can be changed from 0 to 28.1 cc using a manual adjustment with an integral display in the handwheel. Once adjusted, the displacement can be locked to prevent accidental changes. The A7KV also has a double shaft seal with a flushing chamber that helps identify any internal seal leakage. Internal parts and the housing use non-corrosive materials.