VPKC-F30-A2-1 KCL Variable Vane Pump 30 cc/rev 210 bar

Product Overview

The VPKC Series, manufactured by KCL (Kai Jia, Taiwan), is a variable displacement vane pump product line widely used in various industrial hydraulic systems requiring low noise and high efficiency. The series encompasses F8, F12, F15, F20, F23, F26, F30, F40, and other specifications, with displacement ranges covering 8 to 40 cc/rev and maximum operating pressure up to 21 MPa (210 bar).

The VPKC Series features a hydraulically balanced intra-vane (sub-vane) structure design, providing automatic flow adjustment and compensation function at set pressure. Compared to fixed displacement vane pumps, this series offers lower power loss, reduced heat generation, and superior energy efficiency. The series is specially designed for high pressure and low noise, with a wide application range, particularly suitable for plastic injection molding machines, rubber machinery, packaging machinery, woodworking machinery, and various machine tools.

Our products are manufactured to be 100% interchangeable with KCL original specifications—a true “drop-in” replacement solution. Every unit undergoes 100% full-load and flow-matching testing under simulated operating conditions before shipment, ensuring volumetric efficiency, flow rate, and noise performance meet or exceed original specifications at rated pressure.

Technical Specifications 

VPKC-F30-A2-1

• Product Type: Variable Displacement Vane Pump

• Brand: KCL (Kai Jia, Taiwan)

• Series: VPKC

• Geometric Displacement: 30 cc/rev

• Rated Continuous Pressure: 21 MPa (210 bar)

• Pressure Adjustment Range: A2 = 1.5 – 3.5 MPa (15–35 Kgf/cm²)

• Speed Range: 600 – 1800 r/min (max 2000 r/min)

• Minimum Speed: 800 r/min

• Volumetric Efficiency: ≥ 90%

• Mounting Type: F = Flange Mounting

• Rotation: Clockwise (standard, viewed from shaft end), counter-clockwise customizable

• Suffix Code: -1

• Net Weight: Approx. 9.0 kg

• Fluid Compatibility: Mineral-based hydraulic oil

• Recommended Viscosity: 20 – 200 cSt

• Operating Temperature: Recommended 15°C – 60°C (allowable -10°C to +80°C)

• Fluid Cleanliness: NAS 9 or higher recommended

VPKC-F23-A2-1

• Product Type: Variable Displacement Vane Pump

• Brand: KCL (Kai Jia, Taiwan)

• Series: VPKC

• Geometric Displacement: 23 cc/rev

• Rated Continuous Pressure: 21 MPa (210 bar)

• Pressure Adjustment Range: A2 = 1.5 – 3.5 MPa (15–35 Kgf/cm²)

• Speed Range: 600 – 1800 r/min

• Minimum Speed: 800 r/min

• Volumetric Efficiency: ≥ 90%

• Mounting Type: F = Flange Mounting

• Rotation: Clockwise (standard)

• Suffix Code: -1

• Net Weight: Approx. 9.0 kg

• Fluid Compatibility: Mineral-based hydraulic oil

• Recommended Viscosity: 20 – 200 cSt

• Operating Temperature: Recommended 15°C – 60°C

VPKC-F26-A2-1

• Product Type: Variable Displacement Vane Pump

• Brand: KCL (Kai Jia, Taiwan)

• Series: VPKC

• Geometric Displacement: 26 cc/rev

• Rated Continuous Pressure: 21 MPa (210 bar)

• Pressure Adjustment Range: A2 = 1.5 – 3.5 MPa (15–35 Kgf/cm²)

• Speed Range: 600 – 1800 r/min

• Minimum Speed: 800 r/min

• Volumetric Efficiency: ≥ 90%

• Mounting Type: F = Flange Mounting

• Rotation: Clockwise (standard)

• Suffix Code: -1

• Net Weight: Approx. 9.0 kg

• Fluid Compatibility: Mineral-based hydraulic oil

• Recommended Viscosity: 20 – 200 cSt

• Operating Temperature: Recommended 15°C – 60°C

VPKC-F40-A2-1

• Product Type: Variable Displacement Vane Pump

• Brand: KCL (Kai Jia, Taiwan)

• Series: VPKC

• Geometric Displacement: 40 cc/rev

• Rated Continuous Pressure: 21 MPa (210 bar)

• Pressure Adjustment Range: A2 = 1.5 – 3.5 MPa (15–35 Kgf/cm²)

• Speed Range: 600 – 1800 r/min

• Minimum Speed: 800 r/min

• Volumetric Efficiency: ≥ 90%

• Mounting Type: F = Flange Mounting

• Rotation: Clockwise (standard)

• Suffix Code: -1

• Net Weight: Approx. 9.0 kg

• Fluid Compatibility: Mineral-based hydraulic oil

• Recommended Viscosity: 20 – 200 cSt

• Operating Temperature: Recommended 15°C – 60°C

Key Technical Advantages

1. Intra-Vane (Sub-Vane) Structure Design – High-Pressure Stability, Minimal Leakage
The VPKC Series features a hydraulically balanced intra-vane (sub-vane) structure design. The main vane and sub-vane combination directs high pressure to the vane bottom, keeping vanes tightly against the stator inner wall. This ensures optimal vane-to-stator contact and minimizes internal leakage, maintaining exceptionally high volumetric efficiency (≥ 90%) even under high-pressure conditions. Maximum operating pressure reaches 21 MPa (210 bar).

2. Variable Energy-Saving Design – Significantly Reduced Power Loss
The VPKC Series features a variable vane pump design that automatically adjusts flow and provides compensation at set pressure. Compared to fixed displacement vane pumps, this series offers lower power loss, reduced heat generation, and superior energy efficiency.

3. Low Noise and Stable Flow Output
The VPKC Series is specially designed for low noise, providing smooth and quiet operation. The low-noise and stable flow output characteristics make them widely used in machine tools, injection molding machines, die-casting machines, and construction machinery.

4. Compact Design – Space-Saving Installation
The VPKC Series features compact size, saving installation space, and can be directly coupled to motors. The compact structure provides smooth operation and high reliability.

5. Built-in Pressure Compensator – No External Relief Valve Required
The series features a built-in pressure adjustment mechanism, eliminating the need for a separate relief valve in the system. The built-in compensator automatically adjusts pump delivery to meet system volume requirements at selected pressures.

6. Wide Pressure Adjustment Range for Flexible Adaptation
The VPKC Series offers four pressure adjustment ranges—A1 (0.5–1.8 MPa), A2 (1.5–3.5 MPa), A3 (3.0–5.5 MPa), and A4 (5.0–7.0 MPa). Users can flexibly select based on actual system pressure requirements.

7. 100% Drop-In Interchangeability – Zero Retrofit Cost
Manufactured to exact KCL original specifications—mounting dimensions, port locations, and shaft configurations are identical to the original. Mounting flange complies with ISO 3019-1 standards. No piping modifications or installation adapters are required for direct replacement.

Application Areas

• Plastic Injection Molding Machines: VPKC Series particularly suitable for plastic injection molding machines

• Rubber Machinery: Foaming machines, flat vulcanization presses, etc.

• Packaging Machinery: Hydraulic systems for various packaging equipment

• Woodworking Machinery: Cutting machines, etc.

• CNC Machine Tools & Machining Centers: Smooth hydraulic power for precision numerical control systems

• Die-Casting Machinery: Hydraulic systems for die-casting machines

• Construction Machinery: Hydraulic systems for various construction equipment

• Hydraulic Presses: Hydraulic power for various stamping and pressing equipment

• Small Hydraulic Power Units: Indoor hydraulic stations requiring energy-efficient operation

Expert Maintenance Tips

1. Model Identification and Selection

• VPKC Series: Single variable vane pump. In model VPKC-F30-A2-1: F30 = 30 cc/rev displacement, A2 = 1.5–3.5 MPa pressure range, -1 = Design number/version.

• Displacement Options: F08(8), F12(12), F15(15), F20(20), F23(23), F26(26), F30(30), F40(40) cc/rev.

• Pressure Code Reference: A1 = 0.5–1.8 MPa (5–18 Kgf/cm²), A2 = 1.5–3.5 MPa (15–35 Kgf/cm²), A3 = 3.0–5.5 MPa (30–55 Kgf/cm²), A4 = 5.0–7.0 MPa (50–70 Kgf/cm²). Suffix codes A1/A2/A3/A4 represent structural variations such as shaft type, rotation direction, or port position.

2. Installation Precautions

• Verify pump rotation direction matches system requirements—standard is clockwise (viewed from shaft end), counter-clockwise customizable.

• Ensure proper alignment between pump shaft and drive shaft; use flexible coupling.

• Mounting base must be sturdy to avoid vibration.

• Suction piping should be as short as possible, minimizing unnecessary restrictions.

• The pump housing must not bear piping loads; suction and discharge lines must have independent supports.

3. Pre-Startup Checklist

• Fill the pump housing with clean hydraulic oil; jog the motor to purge air.

• Ensure suction line is unobstructed and leak-free.

• Confirm fluid type is correct (ISO VG32, VG46, or VG68 anti-wear hydraulic oil recommended).

• Never operate dry—this will immediately damage internal components.

• Suction line must be well-sealed to prevent air ingress, which causes noise and cavitation.

4. Fluid Management

• Mineral-based hydraulic oil with viscosity range 20–200 cSt is recommended.

• Fluid cleanliness is critical—maintain at NAS 9 or higher; install adequate filtration at the inlet.

• Regularly check oil level, oil quality, and filters.

• Recommended operating temperature: 15°C–60°C.

• The drain line must be routed separately back to the reservoir and kept unobstructed; back pressure must not exceed 0.3 MPa.

5. Scheduled Maintenance

• Replace hydraulic oil and filters every 2000 operating hours or annually.

• When replacing oil, thoroughly clean the system.

• VPKC Series features cartridge-type construction—cartridges can be replaced independently.

• For long-term storage, fill with rust-preventive oil and seal all ports.

• If flow drops or pressure becomes unstable, first inspect cartridge wear and variable mechanism condition.