CASAPPA Replacements

CASAPPA Cast iron External Gear Pump KP30.51

CASAPPA Cast iron External Gear Pump KP30.51-A8K9-LME/MC-KSL/GS/30.27 is a high-performance, fixed-displacement external gear pump built to deliver high volumetric efficiency and stable hydraulic power under demanding industrial and mobile operating pressures. Its rugged two-piece cast iron housing and precision-machined gears ensure reliable flow, low noise and long service life even under continuous high-load operation.


Applications of CASAPPA Cast iron External Gear Pump KP30.51

This cast iron external gear pump is engineered for heavy-duty fluid transfer and hydraulic circuit pressurization across industrial machinery, agricultural equipment, construction machinery and mobile hydraulic systems. It reliably powers auxiliary functions, steering circuits, lifting mechanisms and drive systems operating under continuous high loads and severe environmental conditions.


Key Technical Specifications

  • Product Model: CASAPPA Cast iron External Gear Pump KP30.51-A8K9-LME/MC-KSL/GS/30.27

  • Brand Replacement: CASAPPA OEM or as requested.

  • Displacement: 51.83 cm³/rev (3.16 in³/rev)

  • Rotation Direction: clockwise (D), counter-clockwise (S), reversible (R)

  • Speed Range: Min. speed 500 r/min; Max. speed 2500 r/min

  • Peak Pressure: Peak pressure 330 bar (max. continuous 285 bar).

Overview of CASAPPA Cast Iron External Gear Pump KP30.51

CASAPPA Cast Iron External Gear Pump KP30.51 is a heavy-duty, Group 3 external gear pump engineered with a rugged high-strength cast iron body and precision-machined gears to deliver high volumetric efficiency, smooth fluid delivery, and dependable continuous operation under demanding hydraulic pressure. Built to European standards, this fixed-displacement pump is designed for mobile and industrial hydraulic circuits that require robust performance, low noise, and a long service life. Its pressure-balanced construction and optimized porting convert mechanical power into hydraulic flow efficiently while withstanding thermal and mechanical stress in harsh working environments.

Dimension of CASAPPA Cast Iron External Gear Pump KP30.51

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Note: Dimensional engineering drawings detailing port locations, shaft lengths, and flange bolt circles are available upon request for precise layout integration.

Pump Installation Specifications

  • Mounting Interface: Standard SAE and European 4-bolt mounting flanges designed for secure, precise alignment on pumps, power take-offs, and hydraulic power units.

  • Drive Connection: Keyed parallel shaft and tapered shaft configurations engineered to accept flexible couplings with minimal radial load.

  • Port Orientation: Side-ported configuration with threaded or SAE split-flange connections to prevent leakage under peak pressure.

  • Alignment Tolerance: Maximum coaxial misalignment between the pump shaft and drive shaft kept within 0.05 mm to prevent premature bearing and seal wear.

Techspecs of CASAPPA Cast Iron External Gear Pump KP30.51

Technical ParameterSpecification
Product ModelCASAPPA Cast Iron External Gear Pump KP30.51-A8K9-LME/MC-KSL/GS/30.27
Displacement51 cm³/rev
Pump GroupGroup 3
Rotation DirectionClockwise (D) / Counter-clockwise (S) / Reversible (R)
Max Continuous Pressure285 bar
Max Intermittent Pressure300 bar
Max Peak Pressure330 bar
Max Speed4,000 r/min
Min Speed500 r/min
Housing MaterialHigh-strength cast iron
Mounting FlangeSAE / European standard (4-bolt)
Port ConnectionThreaded / SAE split flange
Shaft TypeKeyed parallel / tapered/Ext. Involute Spline
Working FluidMineral hydraulic oil (HLP / HM)

Advantages of CASAPPA Cast Iron External Gear Pump KP30.51

  • Exceptional durability provided by a high-strength cast iron housing that suppresses vibration and lowers noise emission.

  • High volumetric efficiency achieved through pressure-balanced side plates and automatic axial clearance compensation.

  • Flexible rotation options supporting clockwise (D), counter-clockwise (S), and reversible (R) requirements to match any circuit layout.

  • Proven contamination resistance and thermal stability thanks to hardened gears and specialized internal surface treatment.

Reference of CASAPPA Cast Iron External Gear Pump KP30.51

  • KP30.51D0 — Clockwise rotation, 51 cm³/rev

  • KP30.51S0 — Counter-clockwise rotation, 51 cm³/rev

  • KP30.51R0 — Reversible rotation, 51 cm³/rev

  • KP30.51-A8K9-LME/MC-KSL/GS/30.27 — Full ordering code

Brand Replacement

HENGYUANG Cast Iron External Gear Pump KP30.51 is engineered as a direct drop-in replacement for the genuine CASAPPA KP30.51 cast iron external gear pump and its Group 3 equivalents, matching the original mounting footprint, port locations, shaft configuration, and performance curves exactly. It installs without any system modification and is fully interchangeable with KP30.51D0 (clockwise), KP30.51S0 (counter-clockwise), and KP30.51R0 (reversible) variants used across agricultural, construction, material-handling, and industrial hydraulic systems.

Applications of CASAPPA Cast Iron External Gear Pump KP30.51

CASAPPA Cast Iron External Gear Pump KP30.51 is widely deployed across mobile and industrial hydraulic systems, including agricultural tractors and implements, construction and earth-moving machinery, forklifts and material-handling equipment, hydraulic power units, steering and auxiliary circuits, and industrial presses. Its Group 3 displacement makes it ideal for applications requiring steady, medium-to-high flow under sustained operating pressure.

Package & Shipping

Each pump is individually sealed in anti-corrosion VCI packaging, cushioned with custom-molded foam, and packed into reinforced export-grade plywood crates to prevent transit damage. We offer global air freight, ocean shipping, and express courier options with full shipment tracking and flexible delivery terms.

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Why Choose Hengyuhang?

Hengyuhang Hydraulics combines decades of manufacturing expertise with rigorous quality control, ensuring every pump undergoes 100% factory pressure and performance testing before dispatch. We provide flexible OEM/ODM volume customization, responsive engineering support, and reliable supply chain solutions tailored to your market demands.

ParameterSpecification
ModelKP30.51-A8K9-LME/MC-KSL/GS/30.27
SeriesCASAPPA KAPPA 30 Compact
TypeExternal gear pump
Displacement51.83 cm³/rev
Body typeStandard (CSC), cast iron
Continuous pressure (p1)210 bar
System pressure (p2)230 bar
Peak pressure (p3)250 bar
Max. speed2500 r/min
Min. speed350 r/min
Drive shaftSAE "B" splined, 13 teeth (A8)
Mounting flangeSAE "B" 2-hole (K9)
Port positionSide ports (L)
PortsSAE flanged ME 39.3 mm / MC 25.4 mm
Rotation directionClockwise (D), counter-clockwise (S), reversible (R/L/B)
SealsBuna NBR (standard), Viton FKM (optional)
Hydraulic fluidMineral oil, ISO/DIN
Viscosity12–100 cSt (recommended), up to 750 cSt
Fluid temperature−25 °C to +80 °C (NBR seals)
Feed pressure0.7 – 3 bar abs
Displacement (cm³/rev)Pump ModelMotor ModelPressure p1 / p2 / p3 (bar)Max. Speed (r/min)Min. Speed (r/min)
21.99KP 30•22KM 30•22270 / 290 / 3103000350
26.70KP 30•27KM 30•27270 / 290 / 3103000350
30.63KP 30•31KM 30•31250 / 270 / 2903000350
34.56KP 30•34KM 30•34250 / 270 / 2903000350
39.27KP 30•38KM 30•38250 / 270 / 2903000350
41.62KP 30•41KM 30•41250 / 270 / 2903000350
43.98KP 30•43KM 30•43230 / 250 / 2703000350
46.34KP 30•46KM 30•46210 / 230 / 2503000350
51.83KP 30•51KM 30•51210 / 230 / 2502500350
56.54KP 30•56KM 30•56190 / 210 / 2302500350
61.26KP 30•61KM 30•61180 / 200 / 2202500350
73.82KP 30•73KM 30•73170 / 190 / 2102500350

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