
L-Type Cup Shape Rubber Seal Used for Piston
Model: YxD
Temperature: -35/+120℃
Speed: ≤1m/s
Pressure: ≤40MPa
Product Introduction
In order to promote the development of the Piston Seals, silicone o ring, back up ring ptfe industry, we will continue to adhere to the development strategy of 'Science and Technology', through continuous technological innovation and closely combining market demand, we will develop more high-quality and efficient new products. We provide customers with a full range of services throughout customer needs, product development, manufacturing, pre-sales, in-sales and after-sales, and successfully resolve customer complaints to establish customer trust and loyalty. We actively increase the power of scientific research and development, which makes the economic benefits rise steadily and the scale of the enterprise expand continuously. We are enthusiastic about social welfare and show a responsible, honest, green, safe and harmonious corporate image. With the core development concept of 'innovation, pragmatism and social responsibility', we are committed to realizing the corporate vision of 'continuous product innovation'.
Description
U cup piston seals has a U-shaped/Y-shaped cross-section and it is typical lip seals that installed in a groove with a tight fit. Hydraulic cup seals is designed to provide a dry sealing solution in light and medium-duty applications. It is for easy installation and excellent low temperature performance.
The seal can be considered for use in heavy-duty applications when used with a suitable full depth back-up ring. The sealing lips are trimmed at an angle to give optimal sealing performance.
Hydraulic cup seals makes it ideally suited for single-acting rod or piston applications. Can also be fitted back-to-back for use in double-acting applications.
Material | NBR, FKM or PU |
Color | Black, Brown, Red, Blue or Ivory |
Speed | ≤1m/s |
Temperature | -35 to 120℃ |
Pressure | ≤40MPa |
Medium | Mineral oil based hydraulic fluids, barely flammable hydraulic fluids, water, air and others |
Application | Mobile hydraulics, Standard cylinders, Machine tools, Injection moulding machines, Presses etc. |
Standard or can fit the groove | Comply with standard of JB/ZQ 4264, GY2, Trelleborg-PUA, Parker-B7, DZ company's D-1 series |
Pressure | 160bar | 250bar | 400bar |
Max Gap E | E≤0.6mm | E≤0.5mm | E≤0.4mm |

Installation Dimension table based on Metric Size (mm)
D H9 | d h9 | H | L1 +0.2 | L2 +0.2 | R1≤ | C≥ |
20~28 | D-6 | 8 | 8.5 | 11.5 | 0.2 | 3 |
30~55 | D-8 | 10 | 11 | 12.5 | 0.2 | 3 |
55~160 | D-12 | 14 | 15 | 17 | 0.4 | 3.5 |
105~300 | D-16 | 18 | 19 | 21.5 | 0.8 | 5 |
320~650 | D-24 | 24 | 26 | 29 | 0.8 | 6.5 |
Feature
● Reliable sealing performance
● Small frictional resistance
● Good pressure and distortion resistance
● Small compression set
● High reciprocating speed
● Simple structure and easy to install
● Adapt to the most demanding working environment


The company has 5,000 square meters of professional production plants, 2000 square meters of constant temperature and humidity production workshop, dozens (sets) of advanced production equipment.
Own a professional and technical production team and sales service team.
The selection of raw materials are international first-line brand suppliers, In order to ensure product quality, we promise that don't add waste (recycled materials) in the material.


In the midst of a fierce competitive market environment, our L-Type Cup Shape Rubber Seal Used for Piston is competitive with a certain brand effect. The reliability and safety of the products have been recognized and praised by consumers at home and abroad. The company has multiple types and varieties of advanced large-scale production equipment to ensure worry-free delivery.
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