Gear pump
Mini External Gear Pump . Group 0PUF 0.19CC-2CC.
The HENGYUHANG Group 0PUF Series is a high-precision, ultra-compact mini external hydraulic gear pump engineered across micro displacements from 0.19 to 2.00 cm³/rev (0.012 to 0.122 in³/rev). Developed specifically for custom OEM replacement and specialized hydraulic micro-power units, this series provides direct dimensional and functional drop-in interchangeability with leading European and international micro-pump brands, including MARZOCCHI (0.25–0.5 series), Rexroth (AZPB), ARGO-HYTOS (GP0), BUCHER (AP05), DANFOSS, VIVOLO (Vivoil XV-0P), BONDIOLI, Brevini, Caproni, GRH, and JIHOSTROJ. Built with high-strength extruded aluminum alloy or ductile cast-iron end-covers and housings, high-precision case-hardened alloy micro-gears, and low-friction DU composite hydrodynamic bushings, the Group 0PUF pump delivers stable continuous working pressures up to 190–240 bar (2,755–3,480 psi), intermittent relief pressures to 210–260 bar (3,045–3,770 psi), and peak pressure tolerance up to 280 bar (4,060 psi). Operating smoothly across an ultra-wide speed range from 700 up to 7,000 r/min with volumetric efficiency exceeding 93%, it offers compact envelope sizing, low operating noise, minimal fluid pulsation, and high mechanical reliability in precision mobile and industrial micro-hydraulic systems.
| HENGYUHANG Group 0PUF Mini Gear Pump Applications
The Group 0PUF micro-hydraulic gear pump is engineered for compact equipment and space-restricted hydraulic circuits requiring high power density and reliable fluid metering. Key mobile applications include mini aerial work platforms, compact electric scissor lifts, automotive tail lifts, cab tilt systems, wheelchair access lifts, small motorized sweepers, and electric pallet trucks. In industrial sectors, it is widely utilized on mini hydraulic power packs (AC and DC micro-power packs), machine tool lubrication circuits, precision clamping devices, medical operating tables, dental patient chairs, laboratory test benches, and solar panel tracking mechanisms. Its micro-displacement precision and high pressure rating also make it suitable for aerospace testing fixtures, drone launch mechanisms, and robotics auxiliary hydraulic loops.
Key parameters
Product Models: HENGYUHANG Group 0PUF Series (0PUF.019 to 0PUF.200)
Brand Replacement: Custom replacement for MARZOCCHI, Rexroth, ARGO-HYTOS, BUCHER, DANFOSS, VIVOLO, BONDIOLI, Brevini, Caproni, GRH, JIHOSTROJ, and other major brands.
Displacement Options: 0.19, 0.25, 0.38, 0.50, 0.75, 1.00, 1.25, 1.50, and 2.00 cm³/rev
Rotation Direction: Clockwise (D) or Anti-clockwise (S), looking at the drive shaft (bi-directional rotation available upon request)
Continuous Operating Pressure (p1): 190 to 240 bar (2,755 to 3,480 psi) depending on displacement
Peak Working Pressure (p3): Up to 280 bar (4,060 psi)
Mounting & Drive Shaft: European standard micro 2-bolt spigot flange (pilot Ø 22 mm), 4-bolt rectangular micro flange, with cylindrical keyed, 1:8 micro-tapered, or splined drive shafts
Min./max. speed (700 / 7,000 r/min), relief-valve settings, interface data, and tightening torques are listed in full in Techspecs below.
- Description
- Tecspecs
- Brand & Reference
- Download Mini External Hydraulic Gear Pump 0PUF PDF
- Send an Inquiry
1. Overview of HENGYUHANG Group 0PUF Mini External Gear Pumps
The HENGYUHANG Group 0PUF mini external gear pump represents precision micro-hydraulic manufacturing, delivering high hydraulic power density within an ultra-compact physical envelope. In micro-hydraulic systems, dimensional tolerances must be maintained within microns (μm) to prevent internal fluid slippage, as small internal clearances significantly impact volumetric performance when handling displacements below 1 cm³/rev.
Each Group 0PUF pump is constructed using high-density aviation-grade extruded aluminum alloy bodies paired with high-tensile cast-iron or aluminum front mounting flanges and rear covers. The internal rotating group consists of case-hardened alloy steel micro-gears precision-hobbed and finished to surface roughness Ra < 0.2 μm, rotating inside high-load PTFE-lined DU composite bushings. Hydrostatic axial pressure balance plates automatically adjust under changing load conditions to seal gear side faces, minimizing leakage and ensuring consistent flow delivery across continuous high-pressure cycles. The pump's compact body profile allows seamless integration into compact DC 12V/24V and AC mini hydraulic power units (central manifold blocks), providing direct drop-in replacement for worn or obsolete European and North American micro-pumps without altering plumbing or electrical motor couplings.
2. Dimension of HENGYUHANG Group 0PUF Mini External Gear Pumps
Reference dimensions for the HENGYUHANG Group 0PUF series micro gear pump with standard European 2-bolt spigot mounting flange and rear or side threaded ports. The letters correspond to the dimensional drawing.
| Displacement | A (Port Centerline) mm | L (Total Length) mm | Weight (kg) | A (in) | L (in) | Weight (lbs) |
|---|---|---|---|---|---|---|
| 0.19 cm³/rev | 29.5 | 58.0 | 0.42 | 1.16 | 2.28 | 0.93 |
| 0.25 cm³/rev | 30.0 | 59.0 | 0.44 | 1.18 | 2.32 | 0.97 |
| 0.38 cm³/rev | 31.0 | 61.0 | 0.46 | 1.22 | 2.40 | 1.01 |
| 0.50 cm³/rev | 32.0 | 63.0 | 0.49 | 1.26 | 2.48 | 1.08 |
| 0.75 cm³/rev | 34.0 | 67.0 | 0.54 | 1.34 | 2.64 | 1.19 |
| 1.00 cm³/rev | 36.0 | 71.0 | 0.59 | 1.42 | 2.80 | 1.30 |
| 1.25 cm³/rev | 38.0 | 75.0 | 0.64 | 1.50 | 2.95 | 1.41 |
| 1.50 cm³/rev | 40.0 | 79.0 | 0.70 | 1.57 | 3.11 | 1.54 |
| 2.00 cm³/rev | 44.0 | 87.0 | 0.81 | 1.73 | 3.43 | 1.79 |
Interface data needed with the drawing:
| Item | Value |
|---|---|
| Mounting flange | European micro 2-bolt spigot flange (pilot Ø 22.0 mm, bolt hole spacing 56.0 mm or 66.0 mm) / 4-bolt micro flange |
| Drive shaft | Cylindrical shaft with woodruff key (Ø 7.0 mm or Ø 8.0 mm) / 1:8 micro tapered shaft / involute spline |
| Outboard bearing | Without outboard bearing (standard direct motor coupling fit) |
| Rotation | Clockwise (D) or Anti-clockwise (S), looking at drive shaft end |
| Ports position | Side-positioned ports (L) or rear-cover positioned ports (P) for compact manifold blocks |
| Inlet Port | G 1/4" BSPP female thread (ISO 228/1) / M12x1.5 / 9/16-18 UNF (optional) |
| Outlet Port | G 1/4" BSPP female thread (ISO 228/1) / M12x1.5 / 9/16-18 UNF (optional) |
| Seals | N — Buna-N (NBR) standard (-20 °C to +85 °C); Viton-FKM available for high temperatures (-15 °C to +110 °C) |
| Body construction | High-strength extruded aluminum alloy body with ductile cast-iron or aluminum end covers |
| Flange bolt tightening torque | 22 ±2 Nm (195 ÷ 212 lbf in) |
| Body tie-rod clamp bolt torque | 25 ±2 Nm (221 ÷ 239 lbf in) |
3. Pump Installation Specifications HENGYUHANG Group 0PUF Series
The HENGYUHANG Group 0PUF pump uses a standardized modular coding matrix that defines displacement, mechanical interfaces, and custom brand replacement parameters:
Code structure — reference: 0PUF — Micro Hydraulic Gear Pump Series
| Segment | Meaning | Standard Options & Features |
|---|---|---|
| Series | 0PUF | Group 0 / 0.5 micro external gear pump architecture (0.19 to 2.0 cm³/rev) |
| Displacement | 0.19 to 2.00 | Specific displacement in cm³/rev (e.g., 0.19, 0.25, 0.50, 1.00, 2.00) |
| Rotation | D / S / B | D clockwise, S anti-clockwise, B bi-directional (internal drain) |
| Flange Type | F1 / F2 / F4 | F1 (European 2-bolt Ø 22 pilot), F2 (4-bolt rectangular), F4 (special manifold flange) |
| Drive Shaft | C7 / T8 / S6 | C7 (Ø 7 mm cylindrical keyed), T8 (1:8 micro taper), S6 (micro spline) |
| Ports | G / M / U | G (BSPP G 1/4"), M (Metric M12x1.5), U (UNF 9/16-18) |
| Seals | N / V | N (Buna NBR standard), V (Viton-FKM high temperature) |
| Mounting Orientation | S / R | S (Side ports), R (Rear ports on end-cover) |
Reading your code & brand replacement cross-references
| HENGYUHANG Group 0PUF Code | Replaces MARZOCCHI Code | Replaces Rexroth Code | Replaces BUCHER / VIVOLO Code | Replaces DANFOSS / ARGO Code | Displacement | Max. Pressure |
|---|---|---|---|---|---|---|
| 0PUF-0.19D-F1-C7-G-N | 0.25 D 18 G | AZPB-10-0019 | AP05/0.25 / XV-0P/0.19 | Micro-D-0.19 / GP0-002 | 0.19 cm³/rev | 240 bar (3,480 psi) |
| 0PUF-0.25D-F1-C7-G-N | 0.25 D 24 G | AZPB-10-0025 | AP05/0.25 / XV-0P/0.25 | Micro-D-0.25 / GP0-003 | 0.25 cm³/rev | 240 bar (3,480 psi) |
| 0PUF-0.38D-F1-C7-G-N | 0.25 D 36 G | AZPB-10-0038 | AP05/0.38 / XV-0P/0.38 | Micro-D-0.38 / GP0-004 | 0.38 cm³/rev | 240 bar (3,480 psi) |
| 0PUF-0.50D-F1-C7-G-N | 0.5 D 0.50 G | AZPB-11-0050 | AP05/0.50 / XV-0P/0.45 | Micro-D-0.50 / GP0-005 | 0.50 cm³/rev | 230 bar (3,335 psi) |
| 0PUF-0.75D-F1-C7-G-N | 0.5 D 0.75 G | AZPB-11-0075 | AP05/0.75 / XV-0P/0.75 | Micro-D-0.75 / GP0-007 | 0.75 cm³/rev | 230 bar (3,335 psi) |
| 0PUF-1.00D-F1-C7-G-N | 0.5 D 1.00 G | AZPB-11-0100 | AP05/1.00 / XV-0P/0.98 | Micro-D-1.00 / GP0-010 | 1.00 cm³/rev | 210 bar (3,045 psi) |
| 0PUF-1.25D-F1-C7-G-N | 0.5 D 1.25 G | AZPB-11-0125 | AP05/1.25 / XV-0P/1.25 | Micro-D-1.25 / GP0-012 | 1.25 cm³/rev | 200 bar (2,900 psi) |
| 0PUF-1.50D-F1-C7-G-N | 0.5 D 1.50 G | AZPB-11-0150 | AP05/1.50 / XV-0P/1.52 | Micro-D-1.50 / GP0-015 | 1.50 cm³/rev | 190 bar (2,755 psi) |
| 0PUF-2.00D-F1-C7-G-N | 0.5 D 2.00 G | AZPB-11-0200 | AP05/2.00 / XV-0P/2.00 | Micro-D-2.00 / GP0-020 | 2.00 cm³/rev | 180 bar (2,610 psi) |
Cross-reference coverage also applies to equivalent models from ASEDA, Boden, BONDIOLI, Brevini, Caproni, GRH, HANSA-TMP, HESPER, HIDRAULICA, JIHOSTROJ, MetaHydra, RONZIO, ROQUET, and SDH.
| Techspecs of HENGYUHANG Group 0PUF Mini External Gear Pumps
| Performance
| Parameter | 0PUF-0.19 | 0PUF-0.25 | 0PUF-0.50 | 0PUF-0.75 | 0PUF-1.00 | 0PUF-1.50 | 0PUF-2.00 | Unit |
|---|---|---|---|---|---|---|---|---|
| Geometric Displacement | 0.19 (0.012) | 0.25 (0.015) | 0.50 (0.031) | 0.75 (0.046) | 1.00 (0.061) | 1.50 (0.092) | 2.00 (0.122) | cm³/rev (in³/rev) |
| Continuous Pressure p1 | 240 (3,480) | 240 (3,480) | 230 (3,335) | 230 (3,335) | 210 (3,045) | 190 (2,755) | 180 (2,610) | bar (psi) |
| Intermittent Pressure p2 | 260 (3,770) | 260 (3,770) | 250 (3,625) | 250 (3,625) | 230 (3,335) | 210 (3,045) | 200 (2,900) | bar (psi) |
| Peak Pressure p3 | 280 (4,060) | 280 (4,060) | 270 (3,915) | 270 (3,915) | 250 (3,625) | 230 (3,335) | 220 (3,190) | bar (psi) |
| Maximum Continuous Speed | 7,000 | 7,000 | 6,500 | 6,000 | 5,500 | 4,500 | 4,000 | r/min |
| Minimum Operating Speed | 800 | 800 | 700 | 700 | 700 | 650 | 650 | r/min |
| Theoretical Flow @ 1,500 r/min | 0.28 (0.07) | 0.38 (0.10) | 0.75 (0.20) | 1.13 (0.30) | 1.50 (0.40) | 2.25 (0.59) | 3.00 (0.79) | l/min (US gpm) |
| Theoretical Flow @ 3,000 r/min | 0.57 (0.15) | 0.75 (0.20) | 1.50 (0.40) | 2.25 (0.59) | 3.00 (0.79) | 4.50 (1.19) | 6.00 (1.59) | l/min (US gpm) |
| Volumetric Efficiency | ≥ 93% | ≥ 93% | ≥ 94% | ≥ 94% | ≥ 94% | ≥ 95% | ≥ 95% | — |
| Mechanical Efficiency | ≥ 88% | ≥ 88% | ≥ 89% | ≥ 89% | ≥ 90% | ≥ 90% | ≥ 90% | — |
| Unit Mass (Approximate) | 0.42 (0.93) | 0.44 (0.97) | 0.49 (1.08) | 0.54 (1.19) | 0.59 (1.30) | 0.70 (1.54) | 0.81 (1.79) | kg (lbs) |
| Interfaces and configuration
| Parameter | Value |
|---|---|
| Rotation | Clockwise (D) or Anti-clockwise (S); bi-directional rotation with internal drain optional |
| Mounting flange | European micro 2-bolt spigot flange (pilot Ø 22.0 mm, 56.0 mm bolt spacing) or 4-bolt rectangular flange |
| Drive shaft | Ø 7.0 mm cylindrical keyed shaft (2.0 mm woodruff key) / 1:8 micro taper / 6-tooth micro spline |
| Ports position | Side-mounted (L) or Rear-mounted (P) directly in the pump end cover |
| Port sizing | G 1/4" BSPP female thread (ISO 228/1) / M12x1.5 / 9/16-18 UNF |
| Seals | N — Buna NBR standard (Viton-FKM optional for synthetic fluids and elevated temperatures) |
| Construction | High-density extruded aluminum body with cast-iron or aluminum end plates |
| Flange bolt tightening torque | 22 ±2 Nm (195 ÷ 212 lbf in) |
| Body tie-rod clamp bolt torque | 25 ±2 Nm (221 ÷ 239 lbf in) |
| Operating conditions
| Parameter | Value |
|---|---|
| Fluid | Mineral-oil-based hydraulic fluid to ISO 6743/4 (HL, HLP) and DIN 51524 |
| Inlet pressure range (absolute) | 0.8 ÷ 2.0 bar abs. (11.6 ÷ 29 psi abs.) |
| Viscosity — recommended | 15 to 46 mm²/s (cSt) [75 to 220 SSU] |
| Viscosity — permissible range | 10 to 800 mm²/s (cSt) [60 to 3,700 SSU] |
| Cold start maximum viscosity | 1,500 mm²/s (cSt) [7,000 SSU] |
| Fluid temperature, N seals | −20 °C to +85 °C continuous (−4 °F to +185 °F); 95 °C (203 °F) peak |
| Fluid temperature, V seals | −15 °C to +110 °C continuous (+5 °F to +230 °F); 120 °C (248 °F) peak |
| Required fluid cleanliness | ISO 4406 18/16/13 (NAS 1638 class 7) — filter rating β10(c) ≥ 200 |
| Storage conditions | Dry environment, 5 °C to 20 °C (41 °F to 68 °F), maximum 24 months |
| Dimensions | see section 2. |
| Advantages of HENGYUHANG Group 0PUF Mini External Gear Pumps
Broad Multi-Brand Interchangeability. Engineered with standardized European and universal micro-mounting dimensions, allowing direct replacement across 20 global brands (MARZOCCHI, Rexroth, ARGO-HYTOS, BUCHER, DANFOSS, VIVOLO, etc.) without altering motor couplers or manifold blocks.
Ultra-Compact Footprint & High Power Density. Delivers operating pressures up to 240 bar from a unit weighing less than 0.5 kg and measuring under 65 mm in length, maximizing power in tight machine installations.
High Rotational Speed Capability. Precision micro-gear profiles and balanced hydrodynamic DU bushings permit operating speeds up to 7,000 r/min, matching high-speed electric DC/AC motors directly without reduction gearing.
High Volumetric Efficiency at Micro Displacements. Floating pressure balance plates and micron-tolerance gear hobbing prevent internal bypass leakage, holding volumetric efficiency above 93% even with low fluid volumes.
Low Noise & Minimal Flow Ripple. Fine-pitch gear teeth geometry and anti-trapping decompression relief pockets ensure smooth, quiet operation (< 58 dBA), ideal for medical, laboratory, and indoor applications.
Dual Porting Configurations. Available with both lateral side ports and end-cover rear ports, simplifying direct cartridge installation onto mini hydraulic power pack manifold blocks.
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Reference — HENGYUHANG Group 0PUF Mini External Gear Pumps
Series architecture across Group 0 / 0.5 micro displacements
| Model Code | Geometric Displacement | Continuous Pressure (p1) | Peak Pressure (p3) | Speed Range | Envelope Length (L) |
|---|---|---|---|---|---|
| 0PUF-0.19 | 0.19 cm³/rev (0.012 in³/rev) | 240 bar (3,480 psi) | 280 bar (4,060 psi) | 800 to 7,000 r/min | 58.0 mm (2.28 in) |
| 0PUF-0.25 | 0.25 cm³/rev (0.015 in³/rev) | 240 bar (3,480 psi) | 280 bar (4,060 psi) | 800 to 7,000 r/min | 59.0 mm (2.32 in) |
| 0PUF-0.38 | 0.38 cm³/rev (0.023 in³/rev) | 240 bar (3,480 psi) | 280 bar (4,060 psi) | 800 to 7,000 r/min | 61.0 mm (2.40 in) |
| 0PUF-0.50 | 0.50 cm³/rev (0.031 in³/rev) | 230 bar (3,335 psi) | 270 bar (3,915 psi) | 700 to 6,500 r/min | 63.0 mm (2.48 in) |
| 0PUF-0.75 | 0.75 cm³/rev (0.046 in³/rev) | 230 bar (3,335 psi) | 270 bar (3,915 psi) | 700 to 6,000 r/min | 67.0 mm (2.64 in) |
| 0PUF-1.00 | 1.00 cm³/rev (0.061 in³/rev) | 210 bar (3,045 psi) | 250 bar (3,625 psi) | 700 to 5,500 r/min | 71.0 mm (2.80 in) |
| 0PUF-1.25 | 1.25 cm³/rev (0.076 in³/rev) | 200 bar (2,900 psi) | 240 bar (3,480 psi) | 700 to 5,000 r/min | 75.0 mm (2.95 in) |
| 0PUF-1.50 | 1.50 cm³/rev (0.092 in³/rev) | 190 bar (2,755 psi) | 230 bar (3,335 psi) | 650 to 4,500 r/min | 79.0 mm (3.11 in) |
| 0PUF-2.00 | 2.00 cm³/rev (0.122 in³/rev) | 180 bar (2,610 psi) | 220 bar (3,190 psi) | 650 to 4,000 r/min | 87.0 mm (3.43 in) |
Complete replacement brand and cross-reference coverage
The Group 0PUF series is configured to directly replace the following manufacturer models:
MARZOCCHI Micro 0.25 & 0.5 Series (0.25 D 18 G, 0.25 D 24 G, 0.5 D 0.50 G, 0.5 D 1.00 G)
Rexroth AZPB Micro Series (AZPB-10-0019, AZPB-10-0025, AZPB-11-0050, AZPB-11-0100)
ARGO-HYTOS GP0 Series (GP0-002, GP0-003, GP0-005, GP0-010)
BUCHER AP05 Micro Series (AP05/0.25, AP05/0.50, AP05/1.00)
VIVOLO (Vivoil) XV-0P Series (XV-0P/0.19, XV-0P/0.25, XV-0P/0.45, XV-0P/0.98)
DANFOSS / Turolla Micro D Series
BONDIOLI & PAVESI HP Micro Gear Pumps
Brevini Fluid Power / Dana Brevini OT050 Series
Caproni 00 Micro Gear Pump Series
GRH 0PF / 0.5PF Series
JIHOSTROJ P23 / X Micro Pumps
HANSA-TMP, HESPER, HIDRAULICA, MetaHydra, RONZIO, ROQUET, SDH, ASEDA, Boden
Brand Replacement
HENGYUHANG specializes in custom OEM replacement manufacturing for micro and mini hydraulic gear pumps. The Group 0PUF series is precision engineered to provide an exact drop-in replacement across 20 international pump brands: MARZOCCHI, Rexroth, ARGO-HYTOS, ASEDA, Boden, BONDIOLI, Brevini, BUCHER, Caproni, DANFOSS, GRH, HANSA-TMP, HESPER, HIDRAULICA, JIHOSTROJ, MetaHydra, RONZIO, ROQUET, SDH, and VIVOLO.
Every HENGYUHANG Group 0PUF pump conforms to the physical dimensions, mounting pilot spigots (Ø 22 mm), shaft diameters (Ø 7 mm keyed, 1:8 taper, or spline), port threads (G 1/4" BSPP), and pressure ratings of original European micro-pumps. This allows machine builders, hydraulic service shops, and equipment operators to replace worn, hard-to-source, or discontinued micro-pumps without costly modifications to electric motor adaptors, manifold blocks, or hydraulic piping.
All units undergo 100% computerized test bench inspection, verifying flow linearity, low-speed volumetric efficiency, pressure holding up to 240 bar, and noise emissions prior to delivery. Provide your original brand and part number when ordering for immediate cross-referencing.
Applications
Typical equipment applications of the Group 0PUF micro-hydraulic gear pump series:
Mobile Lifting Equipment: Electric scissor lifts, micro aerial platforms, automotive tail lifts, and wheelchair accessibility ramps.
Mini Hydraulic Power Units: AC and DC (12V/24V) micro-power packs, compact central hydraulic manifolds, and modular power blocks.
Material Handling: Electric pallet stackers, lift tables, small dock levelers, and automated guided vehicles (AGVs).
Automotive & Commercial Vehicles: Cab tilt systems, convertible roof hydraulic actuators, steering assists, and utility vehicle attachments.
Medical & Laboratory Equipment: Surgical operating tables, motorized patient examination beds, dental chairs, and precision fluid metering rigs.
Industrial Automation & Machine Tools: Automatic tool lubrication circuits, precision workholding clamps, and test bench power packs.
Renewable Energy & Robotics: Solar tracker hydraulic positioners, micro wind turbine pitch controls, and robotic arm hydraulic power loops.
In all applications, the pump delivers smooth, non-pulsating micro-hydraulic flow with low energy consumption and exceptional operational quietness.
Package & Shipping
| Item | Specification |
|---|---|
| Packaging | Individual units packed in shockproof protective cartons with sealed port plugs; bulk orders in reinforced export crates |
| Selling unit | Single item — MOQ 1 unit |
| Net weight | Approximately 0.42 kg (0PUF-0.19) to 0.81 kg (0PUF-2.00) |
| Gross weight | Approximately 0.65 kg to 1.10 kg per unit with carton export packaging |
| Lead time | 3 to 7 working days for standard configurations; volume OEM batches per production schedule |
| Shipping | Air freight, ocean shipping, or international express (DHL, FedEx, UPS) directly to destination |
| Customization | Full customization of mounting flanges, shaft styles, rear/side ports, and laser nameplates |
| Warranty | 1 year comprehensive warranty against manufacturing defects |
Why Choose Hengyuhang?
Dedicated Hydraulic Specialist. Quanzhou Hengyuhang Power Technology Co., Ltd. is located in Fujian, China, specializing in the precision design, manufacture, and custom adaptation of high-pressure hydraulic gear pumps, micro pumps, motors, and hydraulic components.
One-Piece Minimum Order Quantity. Custom-engineered micro pumps available with an MOQ of just 1 piece, providing immediate solutions for maintenance repairs, prototypes, and low-volume OEM equipment.
Comprehensive 20-Brand Cross-Referencing. Full cross-referencing capability replacing MARZOCCHI, Rexroth, ARGO-HYTOS, BUCHER, DANFOSS, VIVOLO, Brevini, Caproni, and other major brands with guaranteed dimensional fit.
High-Precision Micro Machining. Equipped with automated CNC micro-machining centers and gear grinding equipment capable of maintaining tolerances within microns for high volumetric efficiency.
100% Computerized Bench Testing. Every micro pump is tested on automated computerized test benches to verify flow rate, pressure holding, volumetric efficiency, and low acoustic emissions before dispatch.
Fast Global Logistics. Direct connections to international logistics networks ensure prompt delivery of custom replacement pumps to minimize machinery downtime.
One-Year Comprehensive Warranty. Full 12-month warranty backed by responsive technical support for fitment confirmation and commissioning.
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Mini External Gear Pump Group 0PUF (0.19–2 cm³/rev) is an ultra-compact, high-speed micro external hydraulic gear pump designed for high-precision micro-hydraulic systems and compact fluid power units. Featuring high-strength aluminium alloy body construction, high-precision gear pairs, and pressure-balanced balancing plates, it delivers 12 standard displacement options ranging from 0.19 cm³/rev to 2.00 cm³/rev, continuous operating pressures up to 200 bar, and high-speed operation up to 7000 r/min. Its lightweight, miniature footprint and low-noise performance make it ideal for space-constrained installations requiring smooth and dependable fluid delivery.
| Applications
The Group 0PUF mini external gear pump series is widely applied in micro hydraulic power packs (AC/DC micro power units), automotive auxiliary systems (convertible roof mechanisms, electric tailgates, suspension leveling), medical equipment (operating tables, hospital bed adjustment drives), miniature lifting platforms, aerospace and testing instrumentation, precision lubrication circuits, and mobile robotic mechanisms where ultra-small displacement, light weight, and high operating speeds are essential.
| Key Specifications Overview
| Parameter | Specification |
|---|---|
| Series | Group 0PUF Series (Micro / Mini External Gear Pump) |
| Displacement Range | 0.19 ~ 2.00 cm³/rev (12 discrete displacements) |
| Continuous Pressure (P1) | 160 ~ 200 bar |
| Intermittent Pressure (P2) | 190 ~ 230 bar |
| Peak Pressure (P3) | 210 ~ 250 bar |
| Max. Speed Range | 3000 ~ 7000 r/min |
| Min. Speed Range | 500 ~ 1000 r/min |
| Rotation Direction | Clockwise (D) / Counter-clockwise optional |
| Mounting Flange & Shaft | Standard Q1 / cylindrical / keyed / tang drive options |
| Hydraulic Fluid | Mineral-based hydraulic oil (ISO VG 32 ~ 46) |
| Complete Technical Specifications Table (Group 0PUF)
| Type | Displacement (cm³/rev) | Max. Pressure (bar) | Max. Speed (r/min) | Min. Speed (r/min) | ||
|---|---|---|---|---|---|---|
| P1 (Continuous) | P2 (Intermittent) | P3 (Peak) | ||||
| 0PUF-0.19-D*Q1 | 0.19 | 200 | 230 | 250 | 7000 | 1000 |
| 0PUF-0.26-D*Q1 | 0.26 | 200 | 230 | 250 | 7000 | 1000 |
| 0PUF-0.38-D*Q1 | 0.38 | 200 | 230 | 250 | 7000 | 1000 |
| 0PUF-0.50-D*Q1 | 0.50 | 200 | 230 | 250 | 7000 | 1000 |
| 0PUF-0.65-D*Q1 | 0.65 | 200 | 230 | 250 | 7000 | 1000 |
| 0PUF-0.75-D*Q1 | 0.75 | 200 | 230 | 250 | 7000 | 1000 |
| 0PUF-0.88-D*Q1 | 0.88 | 200 | 230 | 250 | 7000 | 1000 |
| 0PUF-1.00-D*Q1 | 1.00 | 200 | 230 | 250 | 6000 | 850 |
| 0PUF-1.25-D*Q1 | 1.25 | 200 | 230 | 250 | 5000 | 700 |
| 0PUF-1.50-D*Q1 | 1.50 | 200 | 230 | 250 | 4000 | 600 |
| 0PUF-1.75-D*Q1 | 1.75 | 180 | 210 | 230 | 4000 | 600 |
| 0PUF-2.00-D*Q1 | 2.00 | 160 | 190 | 210 | 3000 | 500 |
HENGYUHANG Group 0PUF Series — Complete Model List
0PUF Series — Type D*Q1
| Type |
|---|
| OPUF-0.19-D*Q1 |
| OPUF-0.26-D*Q1 |
| OPUF-0.38-D*Q1 |
| OPUF-0.50-D*Q1 |
| OPUF-0.65-D*Q1 |
| OPUF-0.75-D*Q1 |
| OPUF-0.88-D*Q1 |
| OPUF-1.00-D*Q1 |
| OPUF-1.25-D*Q1 |
| OPUF-1.50-D*Q1 |
| OPUF-1.75-D*Q1 |
| OPUF-2.00-D*Q1 |
0PUF Series — Type D*Q3
| Type |
|---|
| OPUF-0.19-D*Q3 |
| OPUF-0.26-D*Q3 |
| OPUF-0.38-D*Q3 |
| OPUF-0.50-D*Q3 |
| OPUF-0.65-D*Q3 |
| OPUF-0.75-D*Q3 |
| OPUF-0.88-D*Q3 |
| OPUF-1.00-D*Q3 |
| OPUF-1.25-D*Q3 |
| OPUF-1.50-D*Q3 |
| OPUF-1.75-D*Q3 |
| OPUF-2.00-D*Q3 |
0PUF Series — Type D*A1
| Type |
|---|
| OPUF-0.19-D*A1 |
| OPUF-0.26-D*A1 |
| OPUF-0.38-D*A1 |
| OPUF-0.50-D*A1 |
| OPUF-0.65-D*A1 |
| OPUF-0.75-D*A1 |
| OPUF-0.88-D*A1 |
| OPUF-1.00-D*A1 |
| OPUF-1.25-D*A1 |
| OPUF-1.50-D*A1 |
| OPUF-1.75-D*A1 |
| OPUF-2.00-D*A1 |
0PUF Series — Type D*A2
| Type |
|---|
| OPUF-0.19-D*A2 |
| OPUF-0.26-D*A2 |
| OPUF-0.38-D*A2 |
| OPUF-0.50-D*A2 |
| OPUF-0.65-D*A2 |
| OPUF-0.75-D*A2 |
| OPUF-0.88-D*A2 |
| OPUF-1.00-D*A2 |
| OPUF-1.25-D*A2 |
| OPUF-1.50-D*A2 |
| OPUF-1.75-D*A2 |
| OPUF-2.00-D*A2 |
0PUF Series — Type R*B4-Q1
| Type |
|---|
| OPUF-0.19R*B4-Q1 |
| OPUF-0.26R*B4-Q1 |
| OPUF-0.38R*B4-Q1 |
| OPUF-0.50R*B4-Q1 |
| OPUF-0.65R*B4-Q1 |
| OPUF-0.75R*B4-Q1 |
| OPUF-0.88R*B4-Q1 |
| OPUF-1.00R*B4-Q1 |
| OPUF-1.25R*B4-Q1 |
| OPUF-1.50R*B4-Q1 |
| OPUF-1.75R*B4-Q1 |
| OPUF-2.00R*B4-Q1 |
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