The Heypac HPU2118/GX05SSVT1 is a high-efficiency, air-driven hydraulic power unit (HPU) designed to convert compressed air into hydraulic pressure. Unlike traditional motor-driven pumps, this unit uses a reciprocating air motor to drive a hydraulic plunger, making it ideal for applications where stall-at-pressure capability is required without heat build-up. The HPU2118 series is renowned for its compact footprint and ability to operate in hazardous or remote environments where electrical power is unavailable or undesired.

Product Datasheet & Technical Specifications

This unit is configured for high-pressure output and chemical compatibility:

• Model Number: HPU2118/GX05SSVT1
• Pressure Ratio: 21:1 (Hydraulic output is 21 times the air input pressure)
• Maximum Hydraulic Pressure: Approximately 145 bar (2100 psi) at 7 bar air input
• Flow Rate: Nominal displacement of 18cm³ per cycle
• Construction (SS): Stainless Steel wetted parts for superior corrosion resistance
• Seals (VT): Viton (FKM) seals, suitable for high temperatures and aggressive fluids
• Reservoir (GX05): 5-liter capacity G-series tank with integral mounting
• Air Drive Pressure Range: 1.4 to 7 bar (20 to 100 psi)

 

Country of Origin

This hydraulic power unit is manufactured in the United Kingdom (UK) by Heypac Ltd, ensuring high-quality engineering and compliance with European machinery directives.

 

Application Fields

The HPU2118/GX05SSVT1 is a versatile power source for various industrial tasks:

• Workholding & Clamping: Maintaining constant pressure on CNC fixtures without consuming energy.
• Valve Actuation: Providing reliable hydraulic power for remote pipeline or process valves.
• Hydraulic Presses: Powering small-scale laboratory or assembly presses.
• Jacking & Lifting: Safe operation in automotive or aerospace maintenance environments.
• Testing Equipment: Providing static pressure for burst testing or leak detection of hoses and valves.

 

Product Instructions & Technical Notes

Before operating the Heypac HPU2118/GX05SSVT1, ensure the compressed air supply is filtered and lubricated to extend the life of the air motor seals. The unit will automatically stall when the hydraulic pressure reaches the set ratio relative to the air pressure; it will only restart if the hydraulic pressure drops, making it exceptionally energy-efficient. To adjust the hydraulic output, simply vary the incoming air pressure via a standard regulator. Ensure the 5-liter reservoir is filled with a compatible hydraulic mineral oil or glycol-based fluid as per the Viton seal specifications.

 

Q&A – Frequently Asked Questions

Q1: Why choose a 21:1 ratio over a higher ratio? A: A 21:1 ratio offers a balance between speed (flow) and pressure. Higher ratios provide more pressure but result in slower cycle rates for the same air volume.

Q2: Can this unit run on nitrogen instead of air? A: Yes, Heypac units can operate using any clean, dry, pressurized gas, including nitrogen, which is common in offshore oil and gas applications.

Q3: What are the benefits of the “SS” stainless steel option? A: The stainless steel construction allows the unit to be used with water, water-glycol, and other mildly corrosive fluids that would damage standard carbon steel pumps.

Q4: Does the unit require a cooling system? A: Generally, no. Because the pump stalls at the set pressure and does not bypass fluid like an electric pump, it generates very little heat during operation.

 

Similar Model Recommendations

1. Heypac HPU2118/GX10SSVT1 (10-liter reservoir version)
2. Heypac HPU2110/GX05 (Higher flow, lower pressure 10:1 ratio)
3. Heypac HPU2125/GX05 (Higher pressure 25:1 ratio)
4. Heypac HPU2118/GX05-B (Standard seals/steel configuration)
5. Heypac GX series standalone 5L Reservoir assemblies