RFA Series Hydraulic Filter

1

RFA-25*1L-Y, RFA-25*3L-Y, RFA-25*5L-Y, RFA-25*10L-Y, RFA-25*20L-Y, RFA-25*30L-Y

Filter element: Glass fiber (high-temperature resistant, filtration precision 1-30μm); Filter housing: Carbon steel Q235 with electrophoretic coating; Sealing ring: Nitrile rubber (NBR) Y-type seal

1. Filter element clogging/wear due to high impurity content in hydraulic oil; 2. Sealing ring aging and deformation caused by long-term contact with high-temperature oil (above 80℃); 3. Housing corrosion in humid working environments

1. Replace the filter element every 2000 working hours or when the pressure difference exceeds 0.3MPa; 2. Control the hydraulic oil temperature within 10-60℃ to avoid accelerating seal aging; 3. Regularly clean the filter housing and apply anti-rust oil to the surface

2

RFA-40*1L-Y, RFA-40*3L-Y, RFA-40*5L-Y, RFA-40*10L-Y, RFA-40*20L-Y, RFA-40*30L-Y

Filter element: Glass fiber (high-temperature resistant, filtration precision 1-30μm); Filter housing: Carbon steel Q235 with electrophoretic coating; Sealing ring: Nitrile rubber (NBR) Y-type seal

1. Filter element damage due to sudden pressure impact in the hydraulic system; 2. Sealing ring wear caused by improper installation (over-tightening); 3. Housing deformation due to external collision

1. Install a pressure relief valve in the system to avoid pressure impact exceeding 25MPa; 2. Use torque wrenches for installation, controlling the tightening torque within 25-30N·m; 3. Install protective covers around the filter to prevent collision

3

RFA-63*1L-Y, RFA-63*3L-Y, RFA-63*5L-Y, RFA-63*10L-Y, RFA-63*20L-Y, RFA-63*30L-Y, RFA-63*10Y

Filter element: Glass fiber (high-temperature resistant, filtration precision 1-30μm); Filter housing: Carbon steel Q235 with electrophoretic coating; Sealing ring: Nitrile rubber (NBR) Y-type seal

1. Filter element wear due to long-term filtration of high-viscosity hydraulic oil; 2. Sealing ring leakage caused by oil contamination (water content exceeding 0.1%); 3. Housing weld seam corrosion due to poor electrophoretic coating

1. Use hydraulic oil with viscosity grade 32-46# as required; 2. Regularly test the water content of hydraulic oil and dehydrate if exceeding the standard; 3. Check the housing coating for damage during maintenance and touch up with anti-rust paint

4

RFA-100*1L-Y, RFA-100*3L-Y, RFA-100*5L-Y, RFA-100*10L-Y, RFA-100*20L-Y, RFA-100*30L-Y

Filter element: Glass fiber (high-temperature resistant, filtration precision 1-30μm); Filter housing: Carbon steel Q235 with electrophoretic coating; Sealing ring: Nitrile rubber (NBR) Y-type seal

1. Filter element clogging due to large oil flow and high impurity content; 2. Sealing ring hardening caused by long-term storage in low-temperature environments (below -10℃); 3. Housing thread wear due to frequent disassembly and assembly

1. Increase the frequency of filter element replacement to every 1500 working hours for large-flow systems; 2. Store the filter in a dry environment with temperature 0-40℃; 3. Apply thread lubricant during disassembly and assembly to reduce wear

5

RFA-160*1L-Y to RFA-160*30L-Y, RFA-250*1L-Y to RFA-250*30L-Y, RFA-400*1L-Y to RFA-400*30L-Y

Filter element: Glass fiber (high-temperature resistant, filtration precision 1-30μm); Filter housing: Carbon steel Q235 with electrophoretic coating; Sealing ring: Nitrile rubber (NBR) Y-type seal

1. Filter element damage due to high-pressure difference (exceeding 0.4MPa); 2. Sealing ring deformation caused by uneven pressure distribution; 3. Housing corrosion due to contact with corrosive media (such as seawater in marine applications)

1. Install a differential pressure gauge to monitor pressure in real time and replace the element in time; 2. Ensure uniform installation of the filter to avoid uneven pressure; 3. Use stainless steel housing filters for marine or corrosive environments

6

RFA-630*1L-Y to RFA-630*30L-Y, RFA-800*1L-Y to RFA-800*30L-Y, RFA-1000*1L-Y to RFA-1000*30L-Y

Filter element: Glass fiber (high-temperature resistant, filtration precision 1-30μm); Filter housing: Carbon steel Q235 with electrophoretic coating (large-flow models with reinforced rib design); Sealing ring: Nitrile rubber (NBR) Y-type seal

1. Filter element fatigue wear due to long-term high-flow operation; 2. Sealing ring leakage caused by vibration of large-scale equipment; 3. Housing deformation due to insufficient support in large-flow applications

1. Configure a bypass filter system for large-flow systems to reduce the load on a single filter; 2. Install vibration-damping pads under the filter; 3. Use dedicated brackets to fix the filter housing to avoid stress deformation

1

RFA-25*1L-C, RFA-25*3L-C, RFA-25*5L-C, RFA-25*10L-C, RFA-25*20L-C, RFA-25*30L-C

Filter element: Glass fiber (low-temperature resistant, filtration precision 1-30μm); Filter housing: Carbon steel Q235 with electrophoretic coating; Sealing ring: Fluorine rubber (FKM) C-type seal

1. Filter element clogging due to low-temperature viscosity increase of hydraulic oil; 2. Sealing ring wear caused by impurity scratch; 3. Housing corrosion due to snow and ice erosion in cold regions

1. Use low-temperature hydraulic oil (pour point ≤-30℃) in cold environments; 2. Install a pre-filter to reduce large-particle impurities entering the filter; 3. Clean the filter surface of snow and ice regularly and apply anti-freezing anti-rust oil

2

RFA-40*1L-C to RFA-40*30L-C, RFA-63*1L-C to RFA-63*30L-C, RFA-100*1L-C to RFA-100*30L-C

Filter element: Glass fiber (low-temperature resistant, filtration precision 1-30μm); Filter housing: Carbon steel Q235 with electrophoretic coating; Sealing ring: Fluorine rubber (FKM) C-type seal

1. Filter element damage due to low-temperature brittle fracture; 2. Sealing ring hardening caused by long-term low-temperature storage; 3. Housing thread seizure due to low-temperature shrinkage

1. Preheat the hydraulic system to above 10℃ before starting in cold weather; 2. Store the filter in a warm environment (above 0℃) when not in use; 3. Apply anti-seize agent to the housing thread during installation

3

RFA-160*1L-C to RFA-160*30L-C, RFA-250*1L-C to RFA-250*30L-C, RFA-400*1L-C to RFA-400*30L-C

Filter element: Glass fiber (low-temperature resistant, filtration precision 1-30μm); Filter housing: Carbon steel Q235 with electrophoretic coating; Sealing ring: Fluorine rubber (FKM) C-type seal

1. Filter element wear due to uneven oil flow in low-pressure systems; 2. Sealing ring leakage caused by system pressure fluctuation; 3. Housing deformation due to thermal expansion and contraction in cold environments

1. Install a flow regulator to ensure stable oil flow; 2. Configure a pressure stabilizing valve in the system to reduce pressure fluctuation; 3. Use elastic brackets for installation to adapt to thermal expansion and contraction

4

RFA-630*1L-C to RFA-630*30L-C, RFA-800*1L-C to RFA-800*30L-C, RFA-1000*1L-C to RFA-1000*30L-C

Filter element: Glass fiber (low-temperature resistant, filtration precision 1-30μm); Filter housing: Carbon steel Q235 with electrophoretic coating (reinforced design); Sealing ring: Fluorine rubber (FKM) C-type seal

1. Filter element clogging due to large flow and low-temperature oil viscosity; 2. Sealing ring damage caused by foreign object intrusion during installation; 3. Housing corrosion due to long-term exposure to cold and humid environments

1. Shorten the filter element replacement cycle to every 1200 working hours in low-temperature large-flow systems; 2. Check the sealing surface for foreign objects before installation; 3. Install a protective cover to prevent rain and snow from eroding the filter

How to choose between RFA series filters with Y-type and C-type seals?

Choose based on the working temperature and pressure of the hydraulic system: Y-type seals (nitrile rubber) are suitable for high-pressure (≤31.5MPa) and normal temperature (10-60℃) environments, such as construction machinery and industrial hydraulic presses; C-type seals (fluorine rubber) are suitable for low-temperature (-30℃ to 40℃) and low-pressure (≤16MPa) environments, such as engineering vehicles in cold regions and refrigeration equipment. Also, consider the compatibility of the sealing material with hydraulic oil.

What are the key indicators for determining the replacement time of RFA series filter elements?

Key indicators include: 1. Pressure difference: Replace when the pressure difference between the inlet and outlet exceeds 0.3-0.4MPa (subject to the filter manual); 2. Working hours: Regular replacement every 2000-2500 working hours under normal conditions, and shorten to 1200-1500 hours in harsh environments (high impurity content, extreme temperature); 3. Oil quality: Replace immediately if the hydraulic oil is severely contaminated (water content >0.1%, impurity content >100mg/L) or deteriorates (discoloration, odor).

How to maintain RFA series hydraulic filters to extend their service life?

Maintenance measures: 1. Keep the hydraulic oil clean: Regularly test the oil quality and replace the oil in time; 2. Correct installation: Use torque wrenches to avoid over-tightening or under-tightening; 3. Environmental protection: Avoid the filter being exposed to harsh environments (high temperature, humidity, corrosion), and install protective devices if necessary; 4. Regular inspection: Check the sealing performance, housing integrity, and pressure difference regularly, and handle abnormalities in time; 5. Standard storage: Store unused filters in a dry, ventilated, and temperature-controlled environment to avoid seal aging.