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HG-HGX series
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The HG series internal gear pumps by Hytek feature axial and radial pressure compensation (clearance compensation). With a design optimised for servo drive compatibility, the HG eliminates flow control valves and discharge circuits, combining the precision required by pressure-holding cycles with real energy savings compared to conventional systems.
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Details
- Available displacements: from 8 cc to 180 cc
- Maximum pressure: 350 bar
- Maximum speed HG series: 3,000 rpm (HG0, HG1), 2,500 rpm (HG2)
- Maximum speed HGX series: 4,000 rpm (HGX0), 3,500 rpm (HGX1), 3,000 rpm (HGX2)
- Compatible fluids: hydraulic mineral oil
- Available versions: single or double (combinations HG00, HG10, HG11, HG21, HG22)
24-MONTH WARRANTY
Benefits
- Ideal for servo pump applications delivering energy savings
- Low noise levels
- High volumetric efficiency over time thanks to the axial and radial pressure compensation mechanism, which automatically adapts to pressure variations
- Significant pressure pulsation reduction for greater precision
Application fields
- Plastic and rubber moulding machines
- Machine tools
- Trimming presses
- Hydraulic power units with servo drive
- Forklifts and industrial vehicles
- Die-casting machines
- Footwear machines
Technical data sheet HG0 SERIES HYTEK
| Code | Displacement (cm3) | Speed nom max (rpm) | P nom (bar) | P max peak (bar) | |||||
|---|---|---|---|---|---|---|---|---|---|
| HG0-8 |
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| HG0-10 |
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| HG0-13 |
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| HG0-16 |
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| HG0-20 |
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| HG0-25 |
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Technical data sheet HG1 SERIES HYTEK
| Code | Displacement (cm3) | Speed nom max (rpm) | P nom (bar) | P max peak (bar) | |||||
|---|---|---|---|---|---|---|---|---|---|
| HG1-25 |
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| HG1-32 |
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| HG1-40 |
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| HG1-50 |
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| HG1-63 |
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Technical data sheet HG2 SERIES HYTEK
| Code | Displacement (cm3) | Speed nom max (rpm) | P nom (bar) | P max peak (bar) | |||||
|---|---|---|---|---|---|---|---|---|---|
| HG2-63 |
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| HG2-80 |
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| HG2-100 |
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| HG2-125 |
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| HG2-145 |
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| HG2-160 |
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| HG2-180 |
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Rexroth cross-reference
Hytek HG and HGX: the alternative to Rexroth PGH, Voith IPV and Eckerle EIPH/EIPC internal gear pumps
The Hytek HG and HGX are internal gear pumps with axial and radial gap compensation, from 8 to 180 cc, designed for servo pumps. They are the alternative to Rexroth PGH, Voith IPV/IPH/IPC and Eckerle EIPH/EIPC: the equivalences are validated size by size by our technical team. The HGX keeps the HG pressures (315 bar nominal, 350 bar peak) and raises the speed up to 4,000 rpm, so you can often choose a smaller size for the same flow.
Series cross-reference
| Series replaced | Hytek series | Displacement | Pressure | Max speed (rpm) |
|---|---|---|---|---|
| Rexroth PGH | HG | 8 – 180 cc | up to 315 bar nominal | 3,000 |
| Rexroth PGH (high pressure / high speed) | HGX | by size | 315 bar nominal / 350 peak | 3,000–4,000 |
| Voith IPV, IPH, IPC | HG / HGX | by size | by size | by size |
| Eckerle EIPH, EIPC | HG / HGX | by size | by size | by size |
Why choose it instead of the original
- Built for servo drives: low noise, low pressure pulsation and high volumetric efficiency over time thanks to gap compensation.
- 24-month warranty and every unit tested on our test bench in Gallarate (Italy) before shipment.
- Delivery: 24–48 hours for stock items, 2 weeks standard.
- Technical support: our engineers convert your current code and check the installation with you.
What we check before confirming the replacement
- Displacement and pressure of the cycle
- Speed: standard (HG) or high (HGX)
- Mounting flange and shaft
- Single or double configuration (HG00, HG10, HG11, HG21, HG22)
Send us your Rexroth code
We return the equivalent code, checked by our technical team, with price and delivery time.
Frequently asked questions
Which pump replaces a Rexroth PGH?
The Hytek HG for standard applications, or the HGX when you need higher speed or a smaller pump for the same flow. The equivalences are validated by our technical team size by size.
And a Voith IPV?
We have validated Hytek HG/HGX equivalents for the Voith IPV, IPH and IPC series. Send us the code and we confirm the size.
And an Eckerle EIPH or EIPC?
Same approach: we have validated Hytek HG/HGX equivalents for the Eckerle EIPH and EIPC series. Send us the Eckerle code and we confirm the size.
Why the HGX in a servo pump?
With up to 4,000 rpm (HGX0) and the same pressure ratings as the HG, the HGX delivers the same flow with a smaller, lighter pump and lower energy consumption.
How do I get the equivalent code?
Send us the full code of your current pump: we return the equivalent HG or HGX code with flange, shaft and configuration checked.
Rexroth, Voith, Eckerle and the series names mentioned are trademarks of their respective owners and are used only to indicate compatibility. Hydraut Europe S.r.l. is not affiliated with these companies. Interchangeability is confirmed code by code by our technical team.
HG and HGX by size
HG and HGX: pressure and speed for every size
Video: the Hytek HG internal gear pump in servo-drive applications (Hytek Power, 3:49).
The HGX is the new generation of the HG. Upgraded filler pieces, more precise bearings and a coated ring gear let it run faster at the same pressure ratings, so you can choose a smaller pump for the same flow. Hytek validated it with 600-hour endurance tests at 350 bar: 5,000 rpm on the HGX0-25 and 4,000 rpm on the HGX1-63, with a performance check every 200 hours.
| Frame | Sizes (cc/rev) | Nominal pressure (bar) | Peak pressure (bar) | Max speed HG (rpm) | Max speed HGX (rpm) |
|---|---|---|---|---|---|
| HG0 | 8, 10, 13, 16 | 315 | 350 | 3,000 | 4,000 |
| HG0 | 20, 25 | 250 | 300 | 3,000 | 4,000 |
| HG1 | 25, 32, 40, 50 | 315 | 350 | 3,000 | 3,500 |
| HG1 | 63 | 250 | 300 | 3,000 | 3,500 |
| HG2 | 63, 80, 100, 125 | 280 | 315 | 2,500 | 3,000 |
| HG2 | 145 | 250 | 280 | 2,500 | 3,000 |
| HG2 | 160 | 210 | 260 | 2,500 | 3,000 |
Peak pressure and maximum speed: up to 10 seconds, at most 50% of the duty cycle. Minimum speed 600 rpm (frame 0) and 200 rpm (frames 1 and 2). Single and double pumps (HG00, HG10, HG11, HG21, HG22).
Figures from Hytek technical documentation (Product Performance, 2025).