WENK Pneumatic GL Series Lubricator
Product Detail
Pressure Regulation Range |
Differential Pressure Drain:0.15~0.9Mpa |
Working Media |
Air |
Proof Pressure |
1.5Mpa |
Working Temperature Range |
-20℃~70℃ |
Filtration Rating |
40μm |
Body Material |
Aluminum Alloy |
G-Series GL Lubricator User Manual

Product Overview
The WENK G-Series GL Lubricator is a premium Airtac-type pneumatic component designed for precise lubrication of pneumatic systems. Featuring a gap seal oil dripping structure and special oil drip nozzle design, it produces a fine, consistent oil mist to provide uniform lubrication for pneumatic components, reducing friction and wear and extending equipment service life.
Technical Specifications:
- Working Medium: Compressed air
- Operating Pressure: 0.15-0.9MPa
- Proof Pressure: 1.5MPa
- Operating Temperature: -5-60°C
- Oil Cup Capacity: 25-160cc (depending on model)
- Recommended Oil: ISO VG32 turbine oil
- Features: Gap seal oil dripping structure, linear oil volume adjustment, transparent bowl for visibility, low pressure loss with high lubrication efficiency

Installation Steps
1. Pre-installation Preparation
- Ensure the compressed air system is shut off and depressurized
- Clean connecting pipes to remove foreign matter and impurities
- Prepare necessary tools: wrench, thread seal tape, etc.
- Check the lubricator for any damage or defects
2. Installation Position and Direction
- Installation Position: Should be installed after the filter and regulator, near the pneumatic components requiring lubrication
- Installation Sequence: Filter → Regulator → Lubricator → Pneumatic components
- Installation Direction: Must be installed vertically with the oil cup facing downward
- Connect pipes according to the arrow indicators on the unit, ensuring correct air flow direction
3. Pipe Connection
- Use thread seal tape on threaded connections to ensure proper sealing
- Tighten connections evenly with a wrench, avoiding excessive force that may damage threads
- Ensure all connections are secure and tight
4. Mounting and Fixing
- Use the dedicated mounting bracket, matching the convex groove with the body's concave groove
- Secure with fixing plates and screws
- Ensure vertical installation with the oil cup facing downward
5. Post-installation Check
- Ensure all connections are secure and free from looseness
- Verify that the lubricator is installed vertically
- Confirm that the air flow direction matches the arrow indicators

Operation Guide
1. Oil Filling Operation
- Recommended Oil: ISO VG32 turbine oil or equivalent
-
Filling Steps:
- Ensure the system is depressurized
- Unscrew the oil cup or filler plug
- Fill with lubricating oil to 80% of the cup capacity
- Reinstall the oil cup or filler plug, ensuring proper sealing
2. Oil Flow Adjustment
-
Adjustment Method:
- Rotate the oil flow adjustment ring, with number 0 representing minimum oil flow and 9 representing maximum
- The adjustment ring can rotate one full turn, with oil volume showing basically linear distribution
- Set the appropriate oil volume according to the requirements of the pneumatic components
-
Recommended Settings:
- General pneumatic components: 4-8 drops per minute
- High-speed moving components: 8-12 drops per minute
- Low-speed heavy-load components: 12-16 drops per minute
3. Startup Procedure
- Slowly open the upstream air source valve to gradually increase pressure
- Check for any leakage in all components
- Observe if the lubricator is dripping oil normally
- Inspect transparent bowls for cracks or damage
4. Oil Level Monitoring
- Regularly check the transparent oil cup to observe the oil level
- When the oil level drops below 1/4 of the cup capacity, lubricating oil should be replenished promptly

Maintenance
1. Daily Inspection
- Regularly check the transparent oil cup to observe oil level and oil condition
- Inspect all components for leakage
- Check connecting pipes for damage
- Verify that oil flow adjustment is appropriate
2. Lubricator Maintenance
-
Cleaning:
- Regularly clean the oil cup and oil drip nozzle to prevent clogging
- Cleaning steps:
- Shut off air supply and relieve pressure
- Unscrew the oil cup and pour out remaining lubricating oil
- Clean the oil cup and oil drip nozzle with cleaning solvent
- Reinstall the oil cup and fill with new lubricating oil
-
Oil Replacement:
- Generally replace lubricating oil every 3-6 months
- If the oil becomes turbid or contaminated, replace immediately
3. Maintenance Schedule
- Oil level check: Daily
- Oil replacement: Every 3-6 months
- Oil cup cleaning: Every 6 months
- Oil drip nozzle inspection: Every 3 months

Precautions
1. Safety Precautions
- Always shut off air supply and relieve pressure before installation and maintenance
- Do not exceed the maximum operating pressure of 0.9MPa
- Avoid use in high-temperature environments (temperature not exceeding 60°C)
- Do not strike transparent bowls with sharp objects
2. Usage Limitations
- For compressed air systems only
- Not suitable for corrosive gas environments
- Avoid direct sunlight and strong vibrations
- Some parts are made of PC material; keep away from organic solvents
3. Oil Selection
- Must use ISO VG32 turbine oil or equivalent
- Do not use gear oil, engine oil, or other types of oil
- Oil should be clean and free from impurities
- Do not mix different brands or types of lubricating oils
4. Troubleshooting
-
No oil dripping:
- Check if oil level is too low
- Check if oil drip nozzle is clogged
- Check if operating pressure is too low
- Check if oil flow adjustment is too small
-
Unstable oil dripping:
- Check if operating pressure is stable
- Check if oil flow adjustment ring is loose
- Check if oil drip nozzle is worn
-
Excessive or insufficient oil mist:
- Readjust the oil flow adjustment ring
- Check if oil viscosity is appropriate

Frequently Asked Questions
Q1: What is the correct installation position and sequence for the lubricator?
A1: Should be installed after the filter and regulator, near the pneumatic components requiring lubrication. Installation sequence: Filter → Regulator → Lubricator → Pneumatic components.
Q2: What type of oil should be used in the lubricator? What oil level should be maintained?
A2: ISO VG32 turbine oil should be used. The oil level should be maintained between 1/4 and 8/10 of the cup capacity, with the optimal level being 80%.
Q3: How to determine if the lubricator is working properly?
A3: Observe if the oil level in the cup decreases steadily, if the oil drip nozzle drips oil regularly, and if the pneumatic components operate smoothly without abnormal noise.
Q4: How to handle a lubricator that is not dripping oil?
A4: Check if the oil level is too low, if the oil drip nozzle is clogged, if the operating pressure is too low, or if the oil flow adjustment is too small. Clean the oil drip nozzle or adjust the oil flow if necessary.
Q5: What is the maintenance cycle for the lubricator?
A5: Oil level check daily, oil replacement every 3-6 months, oil cup cleaning every 6 months, and oil drip nozzle inspection every 3 months.












