CASAPPA Cast iron External Gear Pump KP30.51B

| Overview of CASAPPA KP30.51B-A8K9-POF/F-N-D-CSC

CASAPPA KP30.51B-A8K9-POF/F-N-D-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 "B" two-hole mounting flange (code K9), the SAE "B" 13-tooth spline drive shaft made for that flange (code A8) and rear-positioned SAE straight thread ports (position P), so inlet and outlet leave the pump from the rear face — the layout used where the pipework runs behind the mounting. Position 2 carries the letter B: the unit is reversible with an internal drain, which means it can be driven in either direction and its case leakage is returned inside the pump rather than through an external drain connection. 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 KP30.51B-A8K9-POF/F-N-D-CSC

Reference dimensions for the KP 30•51 single unit. The letters correspond to the dimensional drawing.

Interface data needed with the drawing:

| Pump Installation Specifications CASAPPA KP30.51B-A8K9-POF/F-N-D-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 — official 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: KP30.51B-A8K9-POF/F-N-D-CSC

Techspecs

Performance

Interfaces and configuration

Operating conditions

Advantages

Reversible with internal drain

Position 2 of the code is B, so the pump runs in either direction and its case leakage is returned inside the unit — the circuit does not need an external case-drain line, which removes a hose, a connection and a leak path from the machine.

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.

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.

Wiper shaft seal

Position 10 is D, a shaft seal with wiper seal, which keeps abrasive dust off the seal lip on machines working in dusty conditions.

SAE interface

The K9 two-hole SAE "B" flange and the A8 SAE "B" 13-tooth spline shaft match the SAE mounting and coupling that North-American mobile machinery is already built for, and the rear-positioned SAE straight thread ports (ODT) take standard J514 fittings.

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.

Reference

The KP 30 range — same series, all displacements

Every size below is a valid position 1 in the KAPPA 30 pump ordering code. Pressures are the ratings for unidirectional pumps with side ports and the CSC / CSL Standard body design; reversible pumps are limited to a maximum of 250 bar, except the sizes whose rated value is lower.

KP 30•51 is the smallest displacement of the range that is offered only in the CSC / CSL Standard body design: the Compact design stops at 38 cm³/rev and the High performance design at 46 cm³/rev, so from 51.83 cm³/rev upwards the Standard body is the one to specify. The matching gear-motor range is KM 30, with the same displacements — the two sizes are alternative position-1 entries of the same 12-position code.