
Hydraulic Piston and Rod Packing U Cup Seal
Model: Yxd
Temperature: -35/+120℃
Speed: ≤1m/s
Pressure: ≤40MPa
Product Introduction
Relying on our persistence, pursuit and courage to challenge ourselves forever, we will continue to bring forth the new and create better ptfe o rings, wear strip tape, rubber o rings to thank new and old customers for their support. We focus on our main business, strategic transformation and value creation as our working policy. The company has strong technical force, advanced production equipment, and complete testing methods. It has passed a number of domestic and foreign certifications; the company's products have passed a number of quality management system certifications and are exported to overseas markets. The company attaches great importance to product quality and service quality, based on the business philosophy 'good with people, genuine to whole world, your satisfaction is our pursuit'. Our biggest vision is to make positive contributions to the economic and social development by leaps and bounds and long-term stability.
Description
U cup rod seals consists of a non symmetrical design where the diameter of the cup is oversized for the groove diameter. This excessive condition will exert ring pressure on the seal in the gland to help stabilize. U cup also uses non symmetrical lip design. The dynamic lip is thicker and more aggressive than the static lip.
Hydraulic u cup seals ideally suited for heavy-duty mobile and stationary service where leakage must be held to an absolute minimum. Its geometry is highly resistant to side loading and is insensitive to pressure spikes and reduces or eliminates leakage under severe operating conditions.
The PU materials itself feature excellent physical properties and often used in medium or high-pressure conditions. It has a strong ability to rebound to its original shape after compression without sacrificing tensile strength and the hardness levels of the hydraulic rod seal.
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 4265, GY1, Trelleborg-RU3 series, Parker-BS series, DZ company's D-3 series |
Pressure | 160bar | 250bar | 400bar |
Max Gap E | E≤0.6mm | E≤0.4mm | E≤0.4mm |

Installation Dimension table based on Metric Size (mm)
d h9 | D H9 | H | L1 +0.2 | L2 +0.2 | C≥ | R1≤ |
20~28 | d+6 | 8 | 8.5 | 11 | 3 | 0.4 |
16~55 | d+8 | 10 | 11 | 13 | 3.5 | 0.8 |
55~160 | d+12 | 14 | 15 | 17 | 5 | 1.2 |
100~300 | d+16 | 18 | 19 | 22 | 6.5 | 1.2 |
320~690 | d+24 | 24 | 26 | 29 | 7 | 1.6 |
Feature
● High-pressure resistance
● Extraordinary efficiency
● Excellent wear resistance
● Better compression performance
● Wide working temperature range
● Excellent capability in compensating the deflection of the piston rod


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.


We are committed to opening up the field of Hydraulic Piston and Rod Packing U Cup Seal and building a trustworthy brand in the hearts of customers with unremitting efforts and quality service! While working hard to improve ourselves, we put the needs of customers first, and continue to meet their needs, looking forward to new and old customers to negotiate. Looking to the future, we will vigorously improve quality and efficiency, and make every effort to promote reform and innovation with a simple spirit.
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