CASAPPA Hydraulic Gear Pump PLP20.20S0

| Overview of CASAPPA PLP20.20S0-07E2-LBM/EB-N-E

CASAPPA PLP20.20S0-07E2-LBM/EB-N-E is a POLARIS 20 external gear pump. Casappa builds the POLARIS pumps and motors in three pieces: a body extruded in high-resistance aluminium alloy, an external gear pair running on sleeve bearings with pressure-balanced thrust plates, and a separate mounting flange and rear cover that can be supplied in aluminium or cast iron. That layout gives a high power-to-weight ratio and keeps the wear surfaces controllable independently of the housing. In the version-0 body the 21.14 cm³/rev gear set is rated 200 bar constant operating pressure, 220 bar system pressure and 240 bar peak, and turns between 500 and 3,000 r/min.

Its function in a circuit is to draw oil from the reservoir and convert drive-shaft rotation into pressurised flow. This unit carries the European E2 four-bolt mounting flange, the SAE "A" 11-tooth spline drive shaft (code 07) and side-positioned flanged ports (position L): the inlet is a German four-bolt flange, code BM, with a 27 mm port bore, and the outlet is a European four-bolt flange, code EB, with a 19 mm port bore. Position 2 carries the letter S: looking at the drive shaft the rotation is anti-clockwise, and position 3 is written out as 0, the version without outboard bearing, for applications with no radial or axial load on the drive shaft. Position 8 is N, the standard Buna NBR seal, and position 9 is E — an aluminium mounting flange with a cast-iron rear cover, which saves weight on the flange end while keeping a cast-iron cover on the thrust side.

The port configuration is the part of the code that decides the pipework. Both ports leave the body at the side, and both are four-bolt flanges with metric ISO 60° threads: the inlet is a 27 mm port on a German flange, which is a larger suction bore than the pair the range publishes for this displacement, and it is matched with a 19 mm port on a European flange at the outlet. Position 9 is E, one of four cover options — an aluminium mounting flange with a cast-iron rear cover, which takes weight out of the flange end while leaving cast iron on the thrust side; the cast-iron flange, aluminium cover and all-aluminium combinations can be ordered in the same position.

| Dimension of CASAPPA PLP20.20S0-07E2-LBM/EB-N-E

Reference dimensions for the PLP 20•20 (21.14 cm³/rev) single unit. The letters correspond to the dimensional drawing.

Side ports — position L

Rear ports — position P

Interface data needed with the drawing:

| Pump Installation Specifications CASAPPA PLP20.20S0-07E2-LBM/EB-N-E

The Casappa POLARIS 20 ordering code is a 13-position string: each position selects one characteristic of the pump, and reading it is the fastest way to check that a pump will fit an existing installation. Positions 1 to 9 define the unit itself; positions 10 to 13 define the shaft seal, the drain port position and size, and the shaft arrangement.

Code structure — POLARIS 20, single units:

Position 7 is the only position where a pump and a motor of the same size are written differently: the port pair is listed IN/OUT on a pump and OUT/IN on a motor, which is why the same two flanges appear in the opposite order on the motor side of the range. The flange codes themselves are read by their first letter — a port code beginning with B is a German four-bolt flange, a code beginning with E is a European four-bolt flange, M is an SAE flange to the 3000 psi standard pressure series, S is an SAE flange to the SSS series, G is a GAS straight thread and O is an SAE straight thread.

| Reading your code: PLP20.20S0-07E2-LBM/EB-N-E

Two compatibility notes on this code. The 07 drive shaft — the SAE "A" spline with 11 teeth — is listed in the E2 flange table as an available combination, while the standard combination for that flange is the 82 European tapered shaft: both are carried on the same flange face, so the flange code on its own does not fix the coupling. And the port pair is read family by family — BM places a German four-bolt flange on the suction side and EB a European four-bolt flange on the pressure side, with the larger of the two ports on the inlet.

Techspecs

Performance

Interfaces and configuration

Port data — flanged ports, four bolts, metric thread ISO 60° conforming to ISO/R 262

On this pump the inlet is the low-pressure side and the outlet the high-pressure side, and on this configuration both port flanges are bolted to 15 +1 Nm (133 ÷ 142 lbf in). For reversible rotation, only the high-pressure-side torque is used.

Operating conditions

Advantages

The largest displacement that still runs at 3,000 r/min

From PLP 20•24,5 upwards the maximum speed of the range drops to 2,500 r/min; the 21.14 cm³/rev size is the last one that keeps the full 3,000 r/min, and it therefore delivers the highest flow the group reaches at maximum shaft speed — 63.4 l/min.

Standard European and SAE interface

The E2 four-bolt European mounting flange and the 07 SAE "A" spline shaft are both standard entries in the POLARIS code structure, so the unit matches the mounting and coupling that group-2 machinery is already built around, and it can be fitted to an existing driveline as an available flange-and-shaft combination.

A large suction port for the flow

The inlet is a 27 mm BM port on a German four-bolt flange, which is a bigger suction bore than the BE/BC pair the range publishes for this displacement — useful headroom against suction losses at 63.4 l/min.

Three-piece construction

The extruded high-resistance aluminium alloy body, the sleeve-bearing gear set and the separate mounting flange and rear cover are produced and inspected as individual components, so the wear surfaces can be controlled independently of the housing.

High power-to-weight ratio

The aluminium-alloy body keeps the unit light while the gear set still carries 200 bar continuously and 240 bar peak.

Stable efficiency across the pressure range and the working life

The POLARIS range is specified for consistent volumetric and hydro-mechanical efficiency, which keeps flow stable on a machine working at sustained load rather than at a test-bench point.

Low noise emission

The range is designed for a low level of noise, which matters on turf care, mower and fan-drive applications where the pump runs close to the operator.

Cover material mixed to suit the duty

Position 9 is E: an aluminium mounting flange with a cast-iron rear cover, which takes weight out of the flange end while keeping cast iron on the thrust side. Cast-iron flange, aluminium cover and all-aluminium options are available in the same code.

Integrated outboard bearing option

The same series can be ordered in versions W8, 5, 6, 7 or 9 with an outboard bearing for duty cycles that put radial load on the drive shaft.

Multiple-pump capability

POLARIS units are designed to be combined in standard version, with a common inlet and with separated stages, so one pump family can cover several circuits on the same machine.

Built-in valve options

The range can be ordered with several types of built-in valve, which removes external plumbing from the circuit.

Wide combination choice

European, SAE and German mounting flanges, fifteen drive shafts, two port positions and threaded, GAS-thread, SAE-straight-thread or flanged ports let the same pump be matched to an existing mounting and pipework.

6. Reference of CASAPPA PLP20.20S0-07E2-LBM/EB-N-E

6.1 The POLARIS 20 range — same series, all displacements

Every size below is a valid position 1 in the POLARIS 20 pump ordering code. With p1 the constant operating pressure, p2 the system pressure (relief valve setting) and p3 the peak of pressure. The values refer to side-port unidirectional pumps; for reversible pumps the maximum pressures are 250 bar (3,600 psi), except the sizes whose rated value is lower.

The matching motor range is PLM 20, with the same displacements — the pump and the motor are alternative position-1 entries of the same 13-position code. The same aluminium-body family also covers the POLARIS 10 group, from 1.07 to 10.67 cm³/rev, and the POLARIS 30 group, from 21.99 to 91.10 cm³/rev, with peak pressures up to 300 bar (4,350 psi) across the three groups.

6.2 Complete order numbers of the POLARIS 20 range

Complete POLARIS 20 order numbers covering the PLP 20 range. Reference only — each number is valid only in the exact configuration it describes.

Code examples in the published POLARIS 20 code structure:

7. Brand Replacement

HENGYUHANG supplies a replacement for the CASAPPA POLARIS 20 gear pump series, including PLP20.20S0-07E2-LBM/EB-N-E and the rest of the PLP 20 / PLM 20 size range from PLP 20•4 to PLP 20•31,5. The replacement is built to the same group-2 dimensional envelope and the same international standard interfaces — European, SAE and German mounting flanges, the same drive-shaft families and the same threaded or flanged port options — so a machine originally fitted with a Casappa POLARIS 20 pump can be returned to service without modifying the driveline, the mounting or the pipework.

Replacement units are supplied to the POLARIS 20 interface and dimension data. Fitment is decided by the ordering code of the original pump, so please quote the complete original order number when enquiring.

8. Applications of CASAPPA PLP20.20S0-07E2-LBM/EB-N-E

Typical applications of the POLARIS 20 gear pump family:

Building and construction — supply and auxiliary circuits, steering, and lift and tilt functions on compact machines, excavators and loaders

Material handling — lift, clamp, tilt and positioning circuits on handling equipment, cranes and aerial platforms

Agriculture — implement hydraulics, steering and auxiliary circuits on tractors, balers, harvesters, sprayers and seeders

Forestry — feed, conveyor, saw and attachment circuits on forestry machinery

Turf care and mowers — deck lift, reel and traction circuits on wide-area mowers and turf equipment

Fan drive — pump sections feeding hydraulic fan drive systems and engine cooling circuits

In these machines the pump typically feeds steering circuits, lift and tilt cylinders, auxiliary functions and drive circuits, and is expected to hold stable flow under sustained load, high duty cycles and demanding ambient conditions. The extruded aluminium-alloy body, the sleeve-bearing gear pair and the pressure-balanced thrust plates are what let the unit keep its volumetric efficiency as circuit pressure and oil temperature rise, and the E2 mounting flange and the side-positioned flanged ports let it drop into a machine that is already built around group-2 interfaces.

9. Package & Shipping

10. Why Choose Hengyuhang?

A hydraulic specialist, not a general trader. Quanzhou Hengyuhang Power Technology Co., Ltd. is based in Fujian, China and manufactures hydraulic gear pumps and motors, synchronous motors, multiple pump units, pumps with built-in valves and custom valve blocks.

One-piece minimum order. MOQ is one unit, so a single machine can be put back into service without committing to a production batch.

Model-level checking before you order. Send the complete original order number — for this page, the full PLP20.20S0-07E2-… string — and the configuration is run against the POLARIS 20 dimension, flange, shaft and port data before the unit is built.

In-house production and testing. CNC machining centres, automatic gear heat-treatment lines, single-piece-flow assembly and an automatic hydraulic test bench, with ERP/MES traceability through production.

Replacement coverage across the range. The same plant supplies replacement units for a wide list of hydraulic brands and models, which keeps a mixed machine fleet on one supplier.

Customization support. OEM, ODM and OBM are offered, and customized packaging, graphics, nameplate and logo are available for distributor orders.

One-year warranty. Every unit is covered by a one-year warranty.

Responsive after-sales. Online support for installation and application questions.