CASAPPA KP30.51B Cast iron gear pump|CASAPPA|Gear pumps|Global Brand Classification|HENGYUHANG Power Technology Co., LTD

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CASAPPA KP30.51B Cast iron gear pump

CASAPPA Cast Iron Hydraulic Pumps KP30.51B-A8K9-POF/ F-N-D-CSC High-pressure Oil Pump KP20 KP30 KP35 KP40 Hydraulic Gear Pump

HENGYUHANG cast iron gear pumps, non-standard customized alternatives, CASAPPA hydraulic pumps KP30, KP20, KP35, KP40 oil pumps

Typical Applications

● Mobile Machinery: Agricultural equipment (tractors, balers, sprayers), construction machinery (small excavators, loaders, rollers), and material handling equipment.

● Industrial Machinery: Machine tools, presses, conveyor systems, and plastic injection molding machines.

● Special Vehicles: Municipal vehicles, aerial work platforms (AWPs), and cleaning vehicles.

Performance Data Table (Estimated)

The following table provides estimated performance values at various pressures and a constant speed of 1500 rpm (using ISO VG 46 oil at 50°C).

Pressure (bar)	Pressure (psi)	Theor. Flow (L/min)	Actual Flow (L/min)	Vol. Efficiency (%)	Input Power (kW)	Overall Efficiency (%)
50	725	76.5	74.5	~97.5%	7.5	~85%
100	1450	76.5	73.4	~96%	14.8	~87%
150	2175	76.5	72.3	~94.5%	22.1	~88%
200	2900	76.5	71.4	~93.5%	29.4	~89%
250	3625	76.5	71.0	~93%	36.8	~88%
280 (Peak)	4060	76.5	70.5	~92%

Description

Key Performance Characteristics for KP30.51B-A8K9-POF/ F-N-D-CSC

Here is a summary of the expected performance, typically presented in a pump performance curve.

1. Displacement

51 cm³/rev (3.11 in³/rev). This is a fixed displacement. For every revolution of the shaft, the pump will theoretically move 51 mL of fluid.

2. Pressure Capability

Maximum Continuous Pressure: 250 bar (3,625 psi). This is the pressure the pump can handle for sustained operation.
Peak Pressure: 280 bar (4,060 psi). This is the maximum allowed pressure for short durations (typically < 1-2 minutes in every 10) to handle shock loads. Exceeding this will significantly reduce service life.

3. Speed Range

Minimum Speed: ~600 rpm. This is the lowest speed for acceptable filling of the gear teeth and to avoid cavitation. The minimum speed can be lower if the inlet conditions are ideal (e.g., flooded inlet, low-viscosity fluid).
Maximum Speed: ~2400 - 2800 rpm. This is the maximum speed before cavitation or mechanical limits become an issue. The exact value depends on inlet conditions. A flooded inlet is strongly recommended for this pump to achieve its full performance.

4. Flow Output

Theoretical flow is calculated as: Displacement (cm³/rev) × Speed (rpm) / 1000 = Flow (L/min)

Example at 1500 rpm: (51 cm³/rev × 1500 rpm) / 1000 = 76.5 L/min (20.2 USGPM) Theoretical Flow
The actual flow will be less due to internal leakage. This is defined by Volumetric Efficiency.

5. Efficiency

Performance is defined by two main efficiencies:

Volumetric Efficiency (ηv): This is the ratio of actual flow output to theoretical flow output. It decreases as pressure increases due to internal leakage.

Expected Range: Typically 92% - 96% at rated pressure and optimal speed/viscosity.
At 250 bar & 1500 rpm, actual flow would be approximately: 76.5 L/min × 94% = ~71.9 L/min (19.0 USGPM).

Overall Efficiency (ηt): This is the ratio of hydraulic power output to mechanical power input. It accounts for both volumetric losses and mechanical friction (torque loss).

Expected Range: Typically 85% - 90% at rated pressure and optimal speed/viscosity.

6. Torque Input

Theoretical torque required is calculated as: Displacement (cm³/rev) × Pressure (bar) / 20π ≈ Torque (Nm)

Example at 250 bar: (51 cm³/rev × 250 bar) / (20 × 3.14) = ~203 Nm (150 lb-ft) Theoretical Torque
The actual torque required will be higher due to mechanical friction. This is defined by Hydromechanical Efficiency.

7. Power Input

Mechanical input power required can be calculated from torque and speed or flow and pressure.

Example at 250 bar & 1500 rpm:

Hydraulic Power Output: (Flow L/min × Pressure bar) / 600 = (71.9 × 250) / 600 = ~30 kW
Mechanical Power Input (considering efficiency): 30 kW / 90% = ~33.3 kW (44.7 HP)

This is a critical sizing factor—the prime mover (engine/electric motor) must be able to deliver at least 33.3 kW continuously at this operating point.

HENGYUHANG Company is a set design, production, sales in one of the hydraulic components production company, the company has advanced hydraulic components manufacturing technology and technology, the use of high-precision equipment CNC machining center, gear hot processing automatic production line, , automatic heat treatment multi-purpose furnace, single-piece flow assembly line, automatic hydraulic pump performance test bench. Intelligent equipment adopts automatic unmanned production, and realizes online measurement to ensure product consistency and reliability, intelligent system uses ERP, MES management software, improve production efficiency, and achieve product traceability.

Hengyuhang Power Technology produces and sells external gear pumps, hydraulic synchronous motors, multi-pump units, gear pumps with built-in valves, and custom valve blocks. Meanwhile, according to the specific needs of customers, we provide a variety of products with special specifications.And it can also be used as a substitute for other products (such as Rexlex, Danfoss, MARZOCCHI, Parker, RONZIO, Atos, Buchet, ECKERLE, CONCENTRIC, HYADC, JIHOSTROJ, Hydraulic, SDH, VIVOLO, ARGO-HYTOS, HESPER, HPLPA, HPI, DUPLOMATIC, ROQUET, BODEN,PERMCOP, Caproni, DUPLOMATIC, HIDRAULICA, SETTIMA, SALAMI, HONOR, SHIMADZU, GRH, Brevini, Galtech, BONDIOLI, REXROTH-SIGMA, BLUEASCEND, RISUNY, SUMITOMO, HYDROMAX, SCENERY, REXPOWER, CML, HOERBIGER, SUNNY, HYTEK, Hydro-pack, )

HENGYUHANG also sells a wide range of other international brands of hydraulic pumps, hydraulic valves, hydraulic motors, hydraulic cylinders, hydraulic oil seals, hydraulic equipment and accessories, and has high-quality overseas ordering channels

HENGYUHANG products are mainly used in the supporting services of industries such as automobiles, construction machinery, agricultural machinery, aerial work platforms, hydraulic systems, logistics handling vehicles, new energy vehicles, metallurgical machinery, petroleum machinery, machine tools, and wind powe

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CASAPPA KP30.51B Cast iron gear pump

Typical Applications

Description

Key Performance Characteristics for KP30.51B-A8K9-POF/ F-N-D-CSC

1. Displacement

2. Pressure Capability

3. Speed Range

4. Flow Output

5. Efficiency

6. Torque Input

7. Power Input

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CASAPPA KP30.51B Cast iron gear pump

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