
Hydraulic Seal Single Acting Un Type Piston Rod Seal
Model: DUN
Temperature: -20/+100℃
Speed: ≤0.5m/s
Pressure: ≤40MPa
Product Introduction
Sticking to the principle of 'Super Quality, Satisfactory service', We are striving to be a good business partner of you for wiper seal dkb, ptfe chevron packing, o ring design. We always start from the needs of our customers and develop new products constantly, and never stick to the old ways. We regard it as our mission and vision to create a harmonious and century-long enterprise, make our employees richer, create more wealth for our shareholders, and give thanks to the society. We adhere to the concept of people-oriented and harmonious development, and take safety first and quality first as our guide. We respect every employee, do every job, and satisfy every customer.
Description
U cup UN is used in a wide range of hydraulic cylinders. These seals have a symmetrical configuration of the sealing lips and are mainly used in single acting or double acting standard hydraulic cylinders, particularly for mobile hydraulics under rough operating conditions.
UN hydraulic seals is a lip seal that can be used for piston and rod seals because of the equal height of the two seal lips. The piston rod seal is the most critical seal on any type of fluid power plant, preventing fluid from leaking out of the cylinder to the outside.
Leakage through the rod seal can degrade equipment performance and, in extreme cases, environmental problems. Combined for engineering, the range of automatic hydraulic equipment for the sealing of pistons and piston rods in reciprocating hydraulic cylinders. It is used in a wide range of hydraulic cylinders. UN is a lip seal that can be used for piston and rod seals because of the equal height of the two seal lips.
Material | NBR, FKM or PU |
Color | Black, Brown, Red, Blue or Ivory |
Speed | ≤0.5m/s |
Temperature | -20 to 100℃ |
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 Trelleborg-RUB,DZ-UN, RSS, MUP. |
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 | D | L1 | L2 | H | R1≤ | C≥ |
20~50 | d+8 | 5 | 7 | 4 | 0.4 | 3 |
20~150 | d+6 | 6 | 8 | 5 | 0.2 | 3 |
20~50 | d+8 | 6 | 8 | 5 | 0.4 | 3 |
20~150 | d+10 | 6 | 8 | 5 | 0.8 | 3.5 |
20~50 | d+8 | 7 | 9 | 6 | 0.4 | 3 |
20~150 | d+10 | 7 | 9 | 6 | 0.8 | 3.5 |
20~50 | d+10 | 8 | 10 | 7 | 0.8 | 3.5 |
20~100 | d+8 | 9 | 11 | 8 | 0.4 | 3 |
20~100 | d+10 | 9 | 11 | 8 | 0.8 | 3.5 |
20~100 | d+12 | 9 | 11 | 8 | 0.8 | 3.5 |
20~100 | d+13 | 9 | 11 | 8 | 0.8 | 3.5 |
20~150 | d+15 | 9 | 11 | 8 | 1.2 | 5 |
20~200 | d+12 | 10 | 12 | 9 | 0.8 | 3.5 |
20~200 | d+15 | 10 | 12 | 9 | 1.2 | 5 |
20~200 | d+10 | 11 | 13 | 10 | 0.8 | 3.5 |
20~200 | d+15 | 11 | 13 | 10 | 1.2 | 5 |
d | D | L1 | L2 | H | R1≤ | C≥ |
20~200 | d+20 | 11 | 13 | 10 | 1.2 | 5 |
20~200 | d+10 | 13 | 15 | 12 | 0.8 | 3.5 |
20~250 | d+15 | 13 | 15 | 12 | 1.2 | 5 |
20~250 | d+20 | 13 | 15 | 12 | 1.2 | 5 |
20~250 | d+25 | 13 | 15 | 12 | 1.6 | 7 |
100~250 | d+15 | 17 | 20 | 15 | 1.2 | 5 |
50~350 | d+20 | 17 | 20 | 15 | 1.2 | 5 |
20~250 | d+25 | 17 | 20 | 15 | 1.6 | 7 |
20~250 | d+30 | 17 | 20 | 15 | 2.4 | 8 |
100~300 | d+20 | 18 | 21 | 16 | 1.2 | 5 |
50~300 | d+25 | 18 | 21 | 16 | 1.6 | 7 |
50~300 | d+20 | 20 | 23 | 18 | 1.2 | 5 |
50~300 | d+25 | 20 | 23 | 18 | 1.6 | 7 |
100~300 | d+30 | 20 | 23 | 18 | 2.4 | 8 |
150~400 | d+30 | 24 | 27 | 22 | 2.4 | 8 |
Feature
● High sealing performance under low pressure
● Not suitable for separate sealing
● Easy to install
● Wear-resistance, extended services life
● Resistance against extrusion


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 addition to pursuing continuous progress in technology, we also adhere to the people-oriented concept and strive to improve the quality of Hydraulic Seal Single Acting Un Type Piston Rod Seal to a new level. We hope to establish a flexible and efficient mechanism through various medium- and long-term incentive methods. We continue to strengthen and expand our industrialization business and focus on the extension of our brand to a wide range of development.
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