Hydraulic Multi-Pass Test Bench
The Hydraulic Multi-Pass Test Bench is a precision filtration performance testing system designed for evaluating hydraulic filters, lubricating oil filters, fuel filters, and filtration media under continuous contamination conditions. By injecting standardized test contaminants and using online particle counting, the system quantitatively measures filtration efficiency, contaminant holding capacity, and differential pressure characteristics, providing reliable and repeatable data for filter certification, R&D validation, and production quality control.
Application
(1) Full-flow hydraulic filter performance testing for industrial hydraulic systems, construction machinery, and mobile hydraulics
(2) Engine lubricating oil filter testing for automotive, off-road, and heavy-duty diesel engines
(3) Fuel filter testing for diesel, gasoline, and alternative fuel systems
(4) Filtration efficiency and dirt-holding capacity evaluation of hydraulic and oil filter elements
(5) Performance testing of flat filtration media and pleated filter materials
(6) Research and development testing of new filter media formulations and structures
(7) Incoming inspection and batch quality control in filter manufacturing plants
(8) Comparative testing of domestic and imported hydraulic, oil, and fuel filters
(9) Teaching, training, and demonstration of multi-pass filtration testing principles
Standards
(1) ISO 16889 — Hydraulic fluid power filters — Multi-pass method for evaluating filtration performance
(2) GB/T 18853 — Hydraulic filters — Multi-pass method for evaluating filtration performance
(3) ISO 4548-12 — Full-flow lubricating oil filters for internal combustion engines — Filtration efficiency and contaminant holding capacity
(4) ISO 19438 — Diesel and gasoline fuel filters — Filtration efficiency and contaminant capacity by particle counting
(5) SAE J1858 — Full-flow lubricating oil filters — Test methods
(6) ASTM F23 — Standard guide for filtration testing using particle counting techniques
(7) ISO 4406 — Hydraulic fluid power — Fluids — Method for coding the level of contamination by solid particles
Features
(1) Fully automatic PLC-controlled operation with programmable test sequences and data acquisition
(2) Online upstream and downstream particle counting using a 32-channel particle counter
(3) Simultaneous measurement of filtration efficiency, contaminant holding capacity, and differential pressure
(4) Precise temperature control system with electric heating and refrigeration cooling
(5) Stainless steel piping and contamination-resistant system design for high test reliability
(6) Modular fixture design suitable for spin-on filters and flat filter media samples
(7) Real-time display and recording of flow rate, pressure drop, particle concentration, and test duration
(8) Stable and repeatable test conditions compliant with international multi-pass testing standards
Parameters
| Parameter | Specification |
|---|---|
| Test Medium | YH-15 or equivalent hydraulic/oil medium; customer-specified oils |
| Medium Viscosity | 13.2 mm²/s at 40°C |
| Flow Range | 1 – 100 L/min |
| Flow Sections | 1 L/min (1–10), 2 L/min (10–30), 3 L/min (30–100) |
| Minimum System Pressure | 0.6 MPa |
| Maximum System Pressure | 2.0 MPa |
| Maximum Differential Pressure | 1.6 MPa |
| Differential Pressure Sensor Range | 0 – 200 kPa |
| Contaminant Injection Flow Rate | 50 – 300 mL/min (standard 250 mL/min) |
| Online Dilution Ratio | 1:10 (sampling flow 20 mL/min) |
| Temperature Control | 40 ± 2 °C |
| Test Oil Tank Volume | 50 L (dual-cone structure) |
| Contaminant Tank Volume | 40 L |
| Auxiliary Tank Volume | 100 L |
| Particle Counter | KZD-3A, 32 channels |
| Control Mode | Fully automatic programmable control |
| Heating Method | Silicone rubber electric heating |
| Cooling Method | Refrigeration unit |
| Frame Material | Aluminum profile with stainless steel panels |
| Pipeline Material | 304 stainless steel |
| Filter Media Fixture Area | 200 cm² per set |
| Spin-On Filter Fixture | One set |
| Rated Power | 28 kW |
| Power Supply | AC 380 V, 50 Hz, three-phase |
| Test Bench Dimensions (L×W×H) | 3200 × 1500 × 2000 mm |
| Control Cabinet Dimensions | 800 × 700 × 1800 mm |
FAQ
(1) What is this product?
It is a multi-pass filtration performance test bench used to evaluate hydraulic, oil, and fuel filters using continuous contaminant injection and online particle counting.
(2) What is this product used for?
It is used to measure filtration efficiency, contaminant holding capacity, and pressure drop characteristics under realistic operating conditions.
(3) Why is this product important?
It provides standardized, repeatable, and internationally recognized filtration performance data required for filter certification, product development, and quality assurance.
(4) What problems can this product solve for users?
It eliminates uncertainty in filter performance evaluation and ensures accurate comparison between different filter designs and materials.
(5) What types of filters can be tested?
Hydraulic filters, engine oil filters, fuel filters, spin-on filters, and flat filter media samples can all be tested.
(6) How is this product operated?
The system operates fully automatically via PLC control, with programmable test parameters, real-time monitoring, and automatic data recording.
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