PVL pump
20Pages

Briefly Told 1—7.5, 17.0 and 25.0 cipr sizes available (page 10) 2—5000 psi for two-way or one-way delivery (page 6) 3—Variable or fixed delivery (page 6) 4—For open or closed circuits (page 6) 5—Foot, flange or in-tank mounting 6—90% overall efficiency (page 11) 7—85 dBA sound level (page 11) 9—Seals compatible with petroleum oil or phosphate ester fluids 10—Long life cradle bearings (page 4) 11 —Variety of manual, hydraulic, pneumatic or electric controls available (page 7) 12—0.1 second control shift (zero to full) (page 7) 13—Tandem pump modules (page 14) 15—High pressure relief valve...

Basic Pump Features Oilgear, a builder of hydraulic equipment since 1921, offers you these building block concepts. You pay only for as much system pump line is a basic high pressure variable delivery two-way pump to which the auxiliary components necessary for your particular appli- cation can be easily manifolded or added. Fixed delivery "PFL" pumps are also available. Your design and installation prob- lems are reduced. The compact Type "L" Pump configuration allows foot, flange or in-tank mounting. Controls and optional modules can be mounted on either side of pump as dictated by your...

Rugged Construction A high torque through driveshaft forms the centerline for the heavy- duty pump housing. Additional pumps or other high torque ele- ments can be coupled to the rear of the driveshaft. Thus, without a double-ended electric motor, etc., a package can be built to provide a high/low pressure system for horsepower conservation or multi- ple independent pumping sources The driving (front) half of pump cylinder is splined to the driveshaft. This unique split cylinder design transmits torque and piston head reaction forces to the large cyl- inder roller bearing without trans-...

To help you understand some of obtain the fullest benefits from these units, we have diagrammed a unit with typical modules. High Pressure Pump The driveshaft rotates the cylinder containing the pumping pistons. A harness plate holds piston shoes against cradle. Therefore, when the cradle face is not parallel to the face of the cylinder, an in-out pumping motion is imparted to the pistons as the cylinder revolves. A study of the diagram will show the degree of cradle angle determines the amount of piston stroke and therefore the amount of pump If the cradle angle is reversed, pump delivery...

Improve Your Design Two-Way Flow Pluses With Oilgear Type "PVL" variable delivery pumps, you use power only in proportion to work per- trolled to match the work rate selected while the pressure (force) lower volume and/or pressure out = lower input power to drive the pump. Power is not wasted in the form of heat through bleed off ori- fices, throttle valves, relief valves, etc. You reduce the need for heat save power. By controlling pump delivery, you can steplessly control linear or rotary output motor velocity, direc- position. In addition, the working adjusted (see high pressure relief...

Controls Operators and Modifications A wide variety of direct or remote operated controls to vary delivery are available to you. These integral mounted on either side of the pump. One control assembly, nor- mally, fits all three sizes of PVL Pumps. The correct control selec- tion can optimize your system's per- formance characteristics (some can command zero to full delivery in less than a tenth of a second), save input power, increase machine flex- ibility and greatly reduce your process control link-up problems. Type "A". An instrument air signal remote (explosion proof) control of volume...

Controls Operators and Modifications TYPE "H". Hydraulic servo-motor control requires only a light push- pull force on the control stem to provide you with controlled accel- eration, follow-up, quick reversal of volume. Control includes a hydrau- TYPE "J". Spring operator is some- times used opposite a control to provide a bias (opposing) force to hold cradle against control. TYPE "K'.' Non-adjustable hydraulic operator is usually used opposite a control to provide a bias (opposing) force to hold cradle against control. TYPE "C" (Modification) a choke operator to control rate of volume...

TYPE "R". Remote hydraulic con- trol provides two adjustable preset hydraulic control valve. Usually a type "R" control is required on both sides of pump to provide two preset deliveries. TYPE "S". Screw shaft controls are supplied to both sides of pump. The adjusting screws are used to preset (and lock) delivery volumes. "TYPE "V". Controls are electro- hydraulic positioning systems with electrical position feedback from the control push rods. (Used with type "K" operator). TYPE "U" Modification utilizes an on/off system. This control includes a Linear Variable Differ- ential Transformer...

Pressure Rating Full Delivery Ratings Oilgear standard full volume suction valve modules add approximately 2 psi pressure drop to suction system. Oilgear standard full volume suction valve modules add approximately 2 psi pressure drop to suction system.

PVL-250 Pump. Noise vs. Line Pressure. Based on pump delivering full volume of oil from either port, single microphone noise taken in semi reverberant room at 3 feet from pump surface. Tolerance on curve ± 3 dBA. Pump is supercharged with

Modular Options Suction/Supercharge Modules supercharge module for Oilgear TYPE "A" or "B". Two-way pump differential circuits (can also be used for non-differential circuits) allows full volume suction by the piston pump to either port or, full volume supercharge to either port while automatically blocking the other port. The gear pump relief valve (GPRV) is adjustable from 20 to protect the pilot pump, controls nected to that system from over- loads. GPRV exhaust can partially supercharge the high pressure pump through the two smaller check valves. The back pressure relief valve (BPRV) is...