CASAPPA Hydraulic Gear Pump KP30.51D

| Overview of CASAPPA KP30.51D0-06S8-LMD/MC-N-CSC

CASAPPA KP30.51D0-06S8-LMD/MC-N-CSC is a KAPPA 30 external gear pump. Casappa builds the KAPPA range around a body and a mounting flange in cast iron of superior mechanical specification, and the KAPPA 30 is a solid, compact two-piece construction that allows several functions to be packed into a reduced space. Inside, the external gear pair runs on sleeve bearings between pressure-balanced thrust plates, so the assembly stays rigid and keeps its volumetric efficiency as pressure rises and as the unit wears. In the standard CSC body design the 51.83 cm³/rev gear set is rated 210 bar continuous, 230 bar system pressure and 250 bar peak, and turns between 350 and 2,500 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 SAE "C" two-hole mounting flange (code S8), the SAE "C" 14-tooth spline drive shaft made for that flange (code 06) and side-positioned SAE four-bolt split-flange ports (position L) — inlet MD, outlet MC — so the pipework leaves the pump at the side of the body. Position 2 carries the letter D: the rotation is clockwise looking at the drive shaft, and position 3 is written out as 0, the version without outboard bearing, for applications with no radial or axial load on the shaft. The 06 shaft and the S8 flange are a standard combination in the KAPPA 30 range, so this is the plain SAE "C" interface rather than a special build. The same range can be ordered with European, SAE and ISO mounting flanges, nine drive-shaft options, four port positions and threaded, split-flange or flanged ports, so one pump family covers a wide spread of existing installations.

| Dimension of CASAPPA KP30.51D0-06S8-LMD/MC-N-CSC

Reference dimensions for the KP 30•51 single unit with side ports and the CSC body design. The letters correspond to the dimensional drawing.

Interface data needed with the drawing:

| Pump Installation Specifications CASAPPA KP30.51D0-06S8-LMD/MC-N-CSC

The Casappa KAPPA 30 ordering code is a 12-position string: each position selects one characteristic of the unit, and reading it is the fastest way to check that a pump will fit an existing installation. Positions 1 to 8 define the unit itself; positions 9 to 12 define the drain port, the shaft-seal option, the body design and the painting.

Code structure — example: KP 30•27 R 0 - 04 S3 - L OF/OD - N - OA - C4 - CSC - VNR01

Position 7 lists the port pair in IN/OUT order for pumps and in OUT/IN order for motors — which is why the same European flange appears as ED/EB on a pump and as EB/ED on a motor.

| Reading your code: KP30.51D0-06S8-LMD/MC-N-CSC

Two notes on this code, both of them about availability inside the range. The 06 shaft is the only drive shaft in the KAPPA 30 list that is tied to the S8 mounting face, and it is the one shaft that is not offered on the KP 30•41 size — it is available on KP 30•51. And the 06 / S8 pair is the standard combination for that flange, so the unit needs no special shaft or flange arrangement.

Techspecs

Performance

Interfaces and configuration

Port data — SAE four-bolt flanged ports, J518 standard pressure series 3000 psi (SSM), metric thread to ISO/R 262

On this pump the inlet is the low-pressure side and the outlet the high-pressure side, so the inlet MD flange bolts take 20 +1 Nm (177 ÷ 186 lbf in) and the outlet MC flange bolts take 30 +2.5 Nm (266 ÷ 288 lbf in).

Operating conditions

Advantages

Standard SAE "C" interface

The 06 drive shaft and the S8 mounting flange are a standard combination in the KAPPA 30 range, not a special build: the two-hole SAE "C" flange and the 14-tooth SAE "C" spline shaft match the SAE mounting and coupling that North-American mobile machinery is already built for.

SAE four-bolt split-flange ports

MD/MC are J518 3000 psi series flange ports, so the pipework couples to the pump through standard SAE flange halves and O-rings — a bolted, serviceable joint on both the inlet and the outlet, with a 30.5 mm inlet and a 25.4 mm outlet.

Cast-iron body and mounting flange

The KAPPA range is built around a body and a mounting flange in cast iron of superior mechanical specification, and the rigidity of that assembly is what holds reliability and high volumetric efficiency at high operating pressures.

High operating pressures for the size

210 bar continuous, 230 bar system pressure and 250 bar peak on a 51.83 cm³/rev gear set, with up to 129.6 l/min of flow at 2,500 r/min.

Compact version 0 body

Position 3 is 0, the version without outboard bearing, which is the shortest build of the range and the one to specify where the pump only sees torque and no radial or axial load on the shaft.

Solid, compact two-piece construction

The KAPPA 30 packs several functions into a reduced space, which matters where the pump has to fit inside an existing housing or a tight driveline envelope.

Low noise emission

The external gear design keeps running noise low, which is a requirement on fan drives, municipal machinery and equipment working close to the operator.

Exceptional working life expectancy

Pressure-balanced thrust plates compensate for wear, so the pump keeps its flow as the unit ages.

High efficiency at high temperature

As the circuit oil heats up and the film thins, the cast-iron structure limits the loss of volumetric efficiency — the property Casappa specifies the KAPPA range for.

Available with built-in valves

KAPPA pumps can be ordered with integrated valve functions, which removes external plumbing from the circuit.

Wide combination choice

European, SAE and ISO mounting flanges, nine drive shafts, four port positions and threaded, split-flange or flanged ports let the same pump be matched to an existing driveline, mounting and pipework.

Suited where fluids and size are critical

KAPPA is the range Casappa positions for applications where noise, contamination, non-flammable fluids and envelope size are the deciding factors.

6. Reference of CASAPPA KP30.19,5-A5S9-LMD/MB-KSL/GS/30

6.1 The KP 30 range — same series, all displacements

KP 30•19,5 is the smallest displacement of the KAPPA 30 range: 19.63 cm³/rev (1.20 in³/rev). Its ratings are published as relief-valve setting and peak pressure — 300 bar (4,350 psi) / 320 bar (4,640 psi) with the KSL body design and the GS high-performance level, and 290 bar (4,205 psi) / 310 bar (4,495 psi) with the HSC standard body design — with a maximum speed of 3,000 r/min and a minimum speed of 350 r/min. It is built as a single pump, as a gear motor (KM 30•19,5) with the same displacement, and as a section of a multiple pump.

Every size below is a valid position 1 in the KAPPA 30 ordering code, as a single pump or as a section of a multiple pump. Pressures are the ratings for unidirectional pumps with side ports and the CSC / CSL Standard body design; reversible pumps and motors are rated 15 % lower than the values shown.

Any two sizes in this table can be combined into a KAPPA 30 double pump on the same groups, with the larger section at the drive-shaft end. The matching gear-motor range is KM 30, with the same displacements.

6.2 Complete order numbers identified on the market

Complete KAPPA 30 pump order numbers of the KP 30 range. Reference only — each number is valid only in the exact configuration it describes.

Reference order examples for KAPPA 30 multiple pumps of this series:

7. Brand Replacement

HENGYUHANG supplies a replacement for the CASAPPA KAPPA 30 gear pump series, including KP30.19,5-A5S9-LMD/MB-KSL/GS/30 and the rest of the KP 30 size range, in single-pump and multiple-pump form. The replacement is built to the same group 3 dimensional envelope and the same international standard interfaces — European, SAE and ISO mounting flanges, the same drive-shaft families, and threaded, split-flange or flanged ports — so a machine originally fitted with a Casappa KAPPA 30 pump can be returned to service without modifying the driveline, the mounting or the pipework.

Because a multiple pump is built section by section, the section order, the drive and connecting shafts and the torque limits decide what a replacement may be run at. Replacement units are supplied to Casappa's published interface and dimension data for the KAPPA 30 group, and fitment is decided by the ordering code of the original pump — please quote the complete original order number when enquiring.

8. Applications of CASAPPA KP30.19,5-A5S9-LMD/MB-KSL/GS/30

Typical applications of the KAPPA 30 gear pump family, in single and multiple-pump form:

Building and construction — supply pump on compact machines, excavators and loaders, roller and drum drives, auxiliary circuits

Material handling — lifting, tilting and positioning circuits on handling equipment, cranes and aerial platforms

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

Fan drive — engine cooling fan drives and hydraulic fan circuits

Agriculture — supply and implement circuits on tractors, balers, harvesters, sprayers and seeders

Industrial hydraulics — presses, mixers, machine tools and plastic injection moulding machines

Special vehicles — municipal vehicles, cleaning vehicles and truck-mounted equipment

In these machines a multiple pump feeds two loads at once — typically a working circuit that runs continuously at moderate circuit pressure plus a second service such as steering, pilot, lubrication or cooling. The cast-iron body, the sleeve-bearing gear pairs and the pressure-balanced thrust plates are what let the assembly keep its volumetric efficiency as circuit pressure and oil temperature rise.

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 KP30.19,5-A5S9-… string — and every section, the drive and connecting shafts, the flange and the ports are run against the KAPPA 30 data before the unit is built.

Multiple-pump capability. As a builder of multiple pump units, we assemble the sections, check the torque the drive and connecting shafts will see, and match the section order required by the application.

Coverage of the small displacements. The KP 30•19,5 front section of this assembly is the smallest size of the KAPPA 30 range, and the same plant covers the range up to KP 30•73.

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.