For all Parker's high speed motors, input psi (Pounds Per Square Inch) is specified. For the M205 to M508 series, an input pressure of 1,000 psi is recommended. The maximum input pressure is 1,400 psi. For all other Parker motors, 2,000 psi is recommended. Keep in mind the higher the psi, the faster the shaft rotation. Cubic inch per shaft revolution is specified as well. For the M2 series, .85 cubic inches to 5.08 cubic inches per shaft revolution is required. For the M4 series, .15 to .75 cubic inches per shaft revolution is specified. All these specifications depend on the size of the motor. It is up to the design engineer to determine exactly what size motor is needed to drive a piece of equipment.
The torque outputs of Parker motors are relatively flat. This means that the motors develop the same torque irregardless of rpm. This is a very useful for many applications. By developing the same torque at slow or fast speeds, the same power output is obtained. For example, a conveyor belt may need the same horsepower whether moving slow or fast. For the M4 - 075 motor, the torque is listed at 100 inch-lbs. at 1,000 psi, at 500 rpm. The torque drops off slightly the faster the motor turns. At 3,000 rpm, the torque is about 90 inch-lbs.
All motors can rotate either clockwise or counterclockwise. Two high pressure inlet ports are located on the case, with an outlet drain port. The high pressure inlets are labeled "A" and "B." Attaching the high pressure line to the "A" port will allow rotation in one direction, and attaching it to the "B" port will rotate in the opposite direction. This is useful for automated machinery. A flow control valve can be attached to high pressure lines, hooked up to both ports. Directing to flow to either the "A" port or the "B" port will determine the rotation. For example, a filling machine may have nozzles that drop and rise. The dropping and rising motion can be controlled by the rotation of the motor attached to the nozzle assembly.
All motors conform to SAE (Society of Automotive Engineers) mounting patterns. One type is a faceplate mounting. Two holes are drilled, spaced 4.187 inches or 5.75 inches apart, depending on the motor type. The shaft is in the middle of the two holes, equally spaced between the two. Another type of faceplate mounting has four slots, spaced equally around the output shaft. The slots are spaced 3.54 inches apart, placed on the corners of a square.