The paper hydraulic oil filter element 33×34 is a compact, high-performance disposable filter cartridge designed for small to medium-sized hydraulic systems, lubrication circuits, and oil return lines. Measuring 33 mm in outer diameter and 34 mm in total length, this miniaturized filter element is an ideal choice for tight installation spaces, such as mobile equipment, agricultural machinery, and small industrial power units.
Constructed with high-grade filter paper, this hydraulic oil filter element offers excellent filtration efficiency with a low initial pressure drop. The pleated paper media provides a large effective filtration area within its compact form factor, effectively removing solid contaminants, metal particles, and sludge from hydraulic oil, lubricating oil, and circulating fluids. Its all-metal end caps and durable central core ensure structural stability under normal operating pressures.
| Type | Hydraulic Oil Filter Element |
| OD | 33 mm |
| Height | 34 mm |
| Filter material | Paper |
| Filtration rate | Customized |
| Working temperature | -20~+110℃ |
| End caps | Carbon steel |
| Custom made | Available |
This is the specification of the customized hydraulic oil filter element. If you are in need of custom oil filter, please contact us for a quote.
Every paper hydraulic oil filter element Huahang Filter produces undergoes meticulous quality control, from raw material selection to finished product shipment. While the paper core may seem simple, every detail—from paper type and resin content to fold uniformity and glue oil resistance—affects its performance. This experience is the culmination of over twenty years of dedicated effort.
Our workshop is equipped with automated paper folding machines, end cap assembly lines, and testing equipment to ensure consistent quality across every batch. Most of our workers have many years of experience here, familiar with every stage of production. We believe that good products stem from a dedicated attitude and solid craftsmanship.
At Huahang Filter, we offer robust customization services to tailor the TR-20230 filter element to your specific needs.
Custom Filtration Ratings: Available from 1μm to 100μm to match your exact particle removal requirements
Custom Seal Materials: NBR, Viton, EPDM, or PTFE-encapsulated options
Custom End Caps: Carbon steel, stainless steel, aluminum, or reinforced nylon configurations
Custom Dimensions: Alternative lengths and diameters to fit unique housings
Special Media Options: Glass fiber blends for higher efficiency or wire mesh for cleanable applications
Custom Packaging: Bulk packaging or individual boxes with branding and instructions
Q1: Can I clean and reuse a paper hydraulic filter element?
A: No. Unlike stainless steel or wire mesh elements, paper filter media is designed for single use only. Cleaning (e.g., blowing with compressed air or washing) will damage the cellulose fibers, create irregular pores, and significantly reduce filtration efficiency. Please replace with a new paper element.
Q2: What is the difference between nominal and absolute micron rating for paper filter elements?
A: Nominal micron rating indicates the approximate particle size that the filter can retain at 50–60% efficiency – it is a less strict standard. Absolute micron rating specifies the particle size at which the filter achieves 99.5% efficiency . For critical hydraulic systems (servo valves, proportional valves), always request the absolute rating.
Q3: Can I use the 33×34 paper filter element for diesel fuel filtration?
A: Yes, provided the system pressure does not exceed 1.0 MPa (10 bar). The cellulose paper is compatible with diesel, biodiesel blends (up to B20), and most petroleum-based fuels. However, it is not suitable for gasoline, alcohol-based fuels, or corrosive chemicals. For water separation in diesel systems, use a dedicated coalescer filter. For normal particulate filtration in low-pressure diesel transfer pumps or small diesel engines, the 33×34 paper element works reliably.
