How to find the right Lip Seals AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Lip Seals
- Rotary versus reciprocating
- Rotating shafts use radial oil seals. Hydraulic and pneumatic rods and pistons use U-cup or lip-type rod and piston seals, usually paired with a wiper. The lip geometry and the material are tuned for one kind of motion.
- Material
- NBR suits mineral oils at moderate temperature. Polyurethane suits high-pressure hydraulic rods because it resists wear and extrusion. FKM suits heat. Filled PTFE suits high speed, dry running or chemical service. Wear life and extrusion resistance depend mostly on the compound.
- Pressure rating
- Ordinary single-lip shaft seals are meant for near-zero pressure differential. Under real pressure, use a pressure-rated profile or add a backup ring. Pressure flips or extrudes an unsupported lip.
- Orientation and dust lip
- Install with the sealing lip facing the fluid. Use a dual-lip or separate wiper design wherever dirt reaches the shaft. A reversed lip leaks immediately, and contamination wears the main lip quickly.
Brands that matter
- Parker: Large catalog of rod, piston and wiper profiles.
- Hallite: Hydraulic cylinder seal specialist.
- Trelleborg: PTFE and polyurethane fluid power seals.
- SKF: Lip-type shaft and hydraulic seals.
What to avoid
- Sizing a cylinder seal by eye. Measure the groove, rod and bore.
- Pulling a seal over threads or sharp edges without a sleeve or bullet tool.