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10-4 Series pumps have a 4" diameter air piston and a 1 1/4" stroke. Nine models are available with pressures up to 29,500 psig.
The maximum air consumption of the pump is 28-SCFM at 100-psi drive-air pressure and free flow (zero outlet pressure), conditions at which the pump operates at maximum speed. As the pump builds outlet pressure, the operating speed, air consumption and liquid outlet flow all decrease. Once the pump reaches the outlet pressure corresponding to its specific pressure ratio, the pump stalls out (stops) and the operating speed, air consumption and liquid outlet flow all become zero.