As a U-ring (U-cup), CP01-P is a lip-shaped single-acting seal with an inner diameter that fits tightly to the bottom of the piston groove. It is made of CNC-machined polyurethane. It is equipped with a strong dynamic sealing lip and a large static lip contact area to ensure effective positioning in the groove. It can be installed back to back with a guide ring in the middle. The choice of different materials allows for a wide range of flexible applicability in temperature and media. ,
This profile has good extrusion resistance and is suitable for pressures up to 40 MPa, provided that the extrusion gap is adapted to the pressure level. Due to the elasticity of the polyurethane material, the U-cup can be easily installed in a closed groove.
Asymmetric single acting piston lip seal, with dynamic sealing lip being shorter and thinner than static one in order to avoid drag pressure built up；
• Interference fit on inside diameter；
• Various materials available for different purposes；
• Best sealing effect across wide temperature range；
• Sealing effect enhanced by high back-pumping ability；
• For pressure up to 400 bar as seal between pressurized spaces or against atmosphere；
• Good sealing under low pressure；
• Excellent static and dynamic sealing；
• Suitable for long stroke applications；
• Little tendency to stick-slip；
• Low break-away force after prolonged periods of standstill；
CP01-P Asymmetric Piston U-Cup - Frequently Asked Questions
Q1: What is the CP01-P Piston U-Cup?
A: The CP01-P is a single-acting, lip-shaped piston seal (U-cup) featuring an asymmetric design. Its dynamic sealing lip is shorter and thinner than the static lip to specifically prevent drag pressure build-up, ensuring high-performance sealing for hydraulic systems.
Q2: What are the main advantages of the CNC-machined CP01-P seal?
A: Unlike traditional molded seals, our CP01-P is CNC-machined from high-quality polyurethane. This manufacturing process provides:
Rapid Delivery: Sealing solutions can be produced and shipped within 24 hours.
Precision Fit: An interference fit on the inside diameter ensures the seal fits tightly to the bottom of the groove.
Flexibility: No tooling costs mean we can produce custom sizes to match any groove specifications.
Q3: What are the technical operating limits of CP01-P?
A: This profile is engineered for high-pressure and heavy-duty applications:
Pressure: Suitable for pressures up to 400 bar (40 MPa).
Stroke: Ideal for long stroke applications with excellent static and dynamic sealing performance.
Friction: Designed with a low break-away force, showing a little tendency to stick-slip even after prolonged standstill.
Q4: Can CP01-P handle high back-pumping requirements?
A: Yes. The CP01-P offers an enhanced sealing effect due to its high back-pumping ability, which ensures that any oil film passing the seal during the out-stroke is effectively pumped back into the cylinder during the return stroke.
Q5: Is it easy to install CP01-P into a closed groove?
A: Yes. Thanks to the high elasticity of the polyurethane material, the CP01-P U-cup can be easily deformed and snapped into closed grooves without damaging the sealing lips.
Q6: In which applications is the CP01-P typically used?
A: While it is a versatile piston seal, it is commonly used in:
Pneumatic and Hydraulic Cylinders.
Telescopic/Multi-stage Cylinders.
Bending Machinery and Industrial Automation.
