HG2-160-01R-VPC-F SUNNY Internal Gear Pump 210 Bar

Product Overview

The HG2-160-01R-VPC-F is a SUNNY / HYTEK HG Series fixed-displacement internal gear pump designed for high-flow industrial hydraulic applications. The HG family uses an axial and radial pressure-compensation design to maintain stable volumetric performance under pressure and at relatively low operating speeds.

For the HG2-160 configuration, the SUNNY technical data specifies an actual displacement of 162.8 cm³/rev, a 210 bar rated operating pressure, 260 bar maximum pressure, a maximum speed of 3000 rpm, a minimum speed of 200 rpm, and an approximate weight of 52 kg.

The HG design incorporates a gear shaft, internal gear ring, sliding bearings, pressure-compensating plates and crescent elements. The pressure-compensation architecture is engineered to control internal clearances, while the high-strength cast-iron construction and internal noise-reduction design support stable operation in demanding industrial environments.

HG pumps are commonly associated with injection molding, die-casting, shoe machinery, forklifts and servo-hydraulic power units. They can also be combined with servo motors or variable-frequency drives to regulate pump speed according to machine load requirements.

For replacement applications, the complete HG2-160-01R-VPC-F configuration must be verified rather than matching only the nominal 160 size. Our replacement engineering focuses on dimensional and functional interchangeability, supported by 100% simulated operating-condition testing before delivery.

Technical Specifications

• Model: HG2-160-01R-VPC-F
• Brand: SUNNY / HYTEK
• Series: HG Series
• Pump Type: Fixed-Displacement Internal Gear Pump
• Group: HG2
• Nominal Size: 160
• Geometric Displacement: 162.8 cm³/rev
• Rated Operating Pressure: 21 MPa / 210 bar
• Maximum Pressure: 26 MPa / 260 bar
• Maximum Speed: 3000 rpm
• Minimum Speed: 200 rpm
• Control Method: Fixed displacement; the pump itself has no variable-displacement control mechanism and may be combined with servo or variable-frequency drive systems.
• Rotation: Clockwise / Right Rotation when viewed from the shaft end; the manual notes that counterclockwise rotation is limited to HG2 single-pump configurations.
• Approximate Weight: 52 kg
• Recommended Fluid: Mineral hydraulic oil; ISO VG46 is recommended.
• Permitted Viscosity Range: 10–300 mm²/s according to the published HG technical manual.
• Operating Temperature: −10°C to +100°C
• Preferred Long-Term Temperature: 20°C to 80°C
• Recommended Cleanliness: Not exceeding approximately NAS 1638 Class 9 / ISO 4406 17/14
• Pump Architecture: Fixed-displacement internal gear pump with axial and radial pressure compensation.
• Seal Configuration: The VPC-F configuration is associated with the HG series sealing options; publicly indexed copies identify fluorine-rubber seal configurations, but the available manual copies contain formatting inconsistencies in the code legend, so the seal material should be confirmed from the actual nameplate or supplier configuration record before final procurement.

Key Technical Advantages

1. Axial and Radial Pressure Compensation

The HG Series uses axial and radial pressure compensation to control internal clearances and reduce leakage paths under pressure. This design contributes to volumetric performance, particularly under lower-speed and lower-viscosity operating conditions.

2. 162.8 cm³/rev Large-Displacement Platform

The HG2-160 provides an actual displacement of 162.8 cm³/rev, making it one of the largest single-pump configurations within the HG platform. It is therefore suited to high-flow hydraulic power units and industrial machines requiring substantial oil delivery.

For reference, the theoretical flow at 1000 rpm is:

162.8 cm³/rev × 1000 rpm ÷ 1000 = approximately 162.8 L/min

This is a theoretical flow calculation. Actual flow depends on volumetric efficiency, pressure, viscosity and operating temperature.

3. 210 Bar Rated Pressure

The official HG technical data identifies 210 bar as the rated pressure and 260 bar as the maximum pressure for the HG2-160 configuration. The maximum pressure should therefore not be treated as a continuous-duty rating.

4. Broad 200–3000 rpm Speed Range

With a published minimum speed of 200 rpm and maximum speed of 3000 rpm, the HG2-160 can operate across a broad speed range. The HG design specifically emphasizes stable output and volumetric performance at lower speed, which is beneficial in servo-driven hydraulic systems.

5. High-Strength Cast-Iron Construction

The SUNNY HG technical documentation highlights high-strength cast iron and an internal noise-reduction structure. This construction is intended to support durability and lower operating noise in industrial hydraulic equipment.

6. Suitable for Servo and Variable-Frequency Drive Systems

HG pumps are used in injection-molding servo systems and can be paired with servo motors or variable-frequency drives. Variable-speed operation allows hydraulic output to better follow machine demand and can improve system energy utilization compared with constant-speed throttling architectures.

Application Areas

Typical applications for the HG2-160-01R-VPC-F include:

• Plastic injection molding machines
• Injection-molding servo hydraulic systems
• Die-casting machinery
• Forging machinery
• Shoe manufacturing machinery
• Forklift hydraulic systems
• Industrial hydraulic power units
• Servo hydraulic systems
• Variable-frequency-drive hydraulic systems
• High-flow hydraulic circuits
• Industrial forming equipment
• Heavy-duty hydraulic machinery

The SUNNY HG documentation specifically identifies injection molding, shoe machinery, die-casting equipment and forklifts, while other industry sources also identify mining vehicles and forging machinery as common applications.

Expert Maintenance Tips

1. Prime and Bleed the Pump Before Startup

The HG technical manual recommends filling the pump with oil or otherwise removing trapped air before the first operation. Air remaining inside the pump or hydraulic lines can increase vibration and noise and can shorten service life.

2. Maintain Shaft Alignment

A flexible coupling should be used between the pump and motor shaft to avoid excessive bending moments and axial thrust. The published manual specifies a maximum shaft-to-motor coaxiality error of 0.15 mm.

3. Properly Size the Suction Line

The suction-line size should not be smaller than the pump inlet and should be designed to minimize inlet pressure loss. Proper suction conditions are essential for stable filling and for minimizing cavitation-related damage.

4. Avoid Excessive External Pipe Loading

The HG documentation recommends avoiding rigid pipe arrangements that impose additional mechanical loads on the pump. Suitable flexible hoses can help reduce transmitted loads and additional operating noise.

5. Maintain Fluid Cleanliness

For this high-flow internal gear pump, contamination control should be treated as a critical maintenance requirement. The published reference is approximately NAS 1638 Class 9 / ISO 4406 17/14. Filter condition, differential pressure and fluid contamination should be monitored routinely.

6. Do Not Use 260 Bar as Continuous Pressure

The distinction between 210 bar rated pressure and 260 bar maximum pressure is critical when designing the hydraulic circuit. Continuous system pressure should remain within the rated working range rather than being set at the maximum-pressure limit.

7. Verify the Complete Part Number During Replacement

For true replacement compatibility, verify:

HG2 + 160 + 01 + R + VPC + F

along with mounting dimensions, shaft configuration, rotation, sealing configuration, ports and drive arrangement.

This complete-code verification is essential for reliable in-place interchangeability rather than relying only on the “HG2-160” displacement designation.