300, 400 series
20Pages

ATMOSPHERIC INLET AXIAL PISTON PUMPS and MOTORS

General Characteristics Ordering Information Design Features & Benefits General Information — Operating Principles — Fluid Recommendations — Ratings & Capabilities Allowable External Gear or Belt Force Fire Resistant Fluids ("FR" Option) Fixed Displacement Pumps & Motors PF/MF300 & 400 Variable Displacement Pumps & Motors Flow Control Pumps: External Handwheel Control PV310 & PV410 Pressure Compensated Pumps: Standard (Setscrew) Control PV320 & PV420 External Handwheel Control PV321 & PV421 Remote (Pilot) Operated PV324 & PV424 Performance Curves, Typical Load Sensing (Flow Compensator)...

300/400 SERIES ORDERING INFORMATION DESIGN CODE Model Number Control Type: 00 - Fixed Unit — No Control Pressure Compensator Pressure Compensator 25 - Load-Sensing (Flow Compensator) Rotation (viewed from Shaft End): D - Bidirectional (molors only) Fluid Connections: Split Flange Pad Inlet & Discharge) Straight Thread O-Ring port Inlet & Discharge (Required for Design Code #6 units) Inlet & 3/4 NPTF Discharge- B - Std. Buna-N (Nitrile)—for Mineral Oil, Water-Glycol, Invert Emulsion V - Vlton—for Phosphate Ester, Hi-Temp. Service Drive Shaft: Displacement Control Options: A - Fixed Volume...

DESIGN FEATURES & BENEFITS A. Separate Vatve Plate—Separate hardened alloy steel valve plate resists wear. Unidirectional de- signs include a precompression orifice from the discharge port to the approaching cylinder. This method allows a uniform, gradual pressure rise from inlet to outlet to minimize mechanical shock and the resultant noise. A decompression orifice communicates with the cylinder approaching the inlet port to the pump case. This decompresses the oil that remains in the cylinder after leaving the discharge port. This increases volumetric effi- ciency and promotes stlffer...

GENERAL INFORMATION OPERATING PRINCIPLES: These pumps are of axial piston, inline design and are available in either fixed or variable displacement The drive shaft is splined to the pump rotor, which carries seven pistons located axial ly about its axis. Each piston has a shoe that is free to pivot and rotate. The shoes bear against a reaction plate, which is angled with respect to the axis of the pump. The port end of the rotor seals against the port plate with Its two arcuate openings. These connect with the inlet and outlet port of the pump. The rotor is free to move axlally to...

ALLOWABLE EXTERNAL BELT OR GEAR FORCE VS.

PUMPS & MOTORS FOR FIRE RESISTANT FLUIDS Improve plant safety Lower fluid cost Reduce pollution Large Ports Bronze Sleeved Control Bore Bronze Sleeved Control Bore These pumps and motors are designed specifically to handle fire resistant fluids such as water glycols The rolling element bearings at the drive shaft end of the pump are sealed in an oil bath, separating them from the "FR" fluid. Self-lubrlcatlng bearings are used on the reaction plate and drive shaft tail for maximum support. Chrome plated control pistons ride in bronze sleeved control bores providing excel- lent bearing...

FIXED DISPLACEMENT (Pumps & Motors) Fixed displacement motors and pumps cannot be regulated. The displacement (flow rate) is deter- mined by the angle of the reaction plate support and the drive speed. They are normally set for maximum displacement, but can be supplied on special order The output torque of a fluid motor is a function of the pressure and displacement. Generally they should be used where the torque requirements are fairly constant throughout the speed range of a particular application. Under all operating condi- tions the oil pressure at either port must not fall below...

TYPICAL PERFORMANCE - MODELS 300/400 MF 300 FIXED DISPLACEMENT MOTOR MF 400 FIXED DISPLACEMENT MOTOR PF 300 FIXED DISPLACEMENT PUMP PF 400 FIXED DISPLACEMENT PUMP PF 300 SERIES AXIAL PISTON PUMP PF 400 SERIES AXIAL PISTON PUMP INLET PRESSURE VS. SPEED INLET PRESSURE VS. SPEED Higher RPM'scanbe attained by supercharging inlet. Consult factory.

VARIABLE DISPLACEMENT PUMPS The external handwheel control manually regulates the flow from zero to maximum delivery by means of a threaded extension that is used to position the angle of the reaction plate. Changing this angle controls the length of the piston stroke, thereby increasing or decreasing displacement of the pump. Rotating the handwheel one turn results in approx- imately 1 ° change in the angle of the reaction plate. One turn of the handwheel changes the flow 1800 rpm) on the PV 310 series pump. One turn of the handwheel changes the flow approximately 2.0 PV 410 series pump. A...

STANDARD PRESSURE COMPENSATOR VARIABLE DISPLACEMENT PUMPS When this control has been set at the desired pres- sure, the pump will automatically deliver maximum flow until the preselected pressure has been reached. It will then automatically maintain the out- put pressure. Simultaneously, the output volume and power requirements are automatically reduced to the amount necessary to maintain this set pres- This is how the pressure compensator control oper- ates. When the pump first starts, a starter spring forces the cam reaction plate off-center, to partial pumping position. As pressure...

HANDWHEEL PRESSURE COMPENSATOR VARIABLE DISPLACEMENT PUMPS For description of operation, see the standard pres- sure compensator pump modef PV 320, In addition to the standard pressure compensator features, these controf types offer a handwheel on the pres- sure compensator to facilitate easy manual adjust- ment of compensating pressures. Drive Shaft Rotation System Diagram: 'As viewed from the front or shaft end. "As viewed from the port end (namepfate up).

REMOTE PRESSURE COMPENSATOR VARIABLE DISPLACEMENT PUMPS The remote pressure compensator control Is de- signed for those applications where frequent adjust- ment of the compensating pressure and/or multiple pressure control circuits Is desired. It adjusts pump delivery automatically to meet system flow require- ments while maintaining the preselected pressure. The compensator pressure setting is determined by the setting of the pilot relief valve, located at a convenient position remote from the pump. When the pump discharge pressure is below the setting of the remote valve, fluid is ported...