
PTFE+Bronze NBR Glyd Piston Seal Ring for Hydraulic Valve
Model: DSF
Temperature: -45/+200℃
Speed: ≤15m/s
Pressure: ≤60MPa
Product Introduction
In order to win a larger share in the international market, we will go all out to make our Piston Rod Seals Vee Packing, metric spring energized seals, SPGO seals more competitive. Every employee of our company is willing to provide high quality service to every customer. Our professional team is always ready to serve you.
Description
Glyd ring piston seal DSF is composed of PTFE seal and O-ring. It is used for double acting sealing of the piston rod of the hydraulic cylinder. Due to adopting special modified PTFE material, it can guarantee excellent low friction, wear resistance, extrusion resistance, high-temperature resistance and chemical resistance.
Glyd ring is a very effective and reliable low friction seal. It is particularly suitable as a piston seal in high pressure and low pressure systems. It comprises a PTFE ring, strengthened with additives to resist creep, which is pre-loaded by an O ring to be effective for the operating pressure range recommended.
As the pressure rises the O ring deforms and compresses the PTFE ring against the tube wall increasing the sealing force and the effectiveness of the seal. As only the PTFE ring is in contact with the sliding surface, friction is very low and stick-slip movement is eliminated.
Slide Ring Material | PTFE Filled Bronze, Carbon, MoS2, Graphite, Glass Fiber, Ekonol, Polyimide, etc. |
Slide Ring Color | Black,Green,Coffee,Yellow etc. |
O Ring Material | NBR or FKM |
Color | Black or Brown |
Speed | ≤15m/s |
Temperature | -45 to 200℃ |
Pressure | ≤60MPa |
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 ISO7425/1, GB/T15242.3,PG44/PG42/PG46, GS55044/42/46, GSF, Trelleborg-PG4 series,Merkel company's OMK-MR series、Parker-OE series、AS-YB series |
Pressure | 160bar | 250bar | 400bar |
Max Gap E | E≤0.6mm | E≤0.4mm | E≤0.2mm |

Installation Dimension table based on Metric Size (mm)
D H9 | d h9 | L +0.2 | O Ring CS d1 | C≥ | R1≤ |
8~24 | D-4.9 | 2.2 | 1.8 | 2 | 0.4 |
15~48 | D-7.5 | 3.2 | 2.65 | 2 | 0.4 |
25~110 | D-11 | 4.2 | 3.55 | 3 | 0.8 |
50~140 | D-15.5 | 6.3 | 5.3 | 5 | 1.2 |
125~320 | D-21 | 8.1 | 7 | 7.5 | 1.6 |
330~660 | D-24.5 | 8.1 | 7 | 8 | 1.6 |
670~990 | D-28 | 9.5 | 8.4 | 8 | 1.6 |
1000~1500 | D-38 | 13.8 | 12 | 8.5 | 2 |
Feature
● Low stick/slip
● Low breakout and running
● High surface speed
● Compact piston design
● Suitable for non lubricating fluids depending on seal material for optimum design flexibility
● High wear resistance ensures long service life
● No adhesive effect to the mating surface during long period of inactivity or storage
● Suitable for most hydraulic fluids in relation with most modern hardware materials and surface finish depending on material selected


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 will make wonderful endeavours to produce new and top-quality merchandise, satisfy your exclusive requirements and supply you with pre-sale, on-sale and after-sale services for PTFE+Bronze NBR Glyd Piston Seal Ring for Hydraulic Valve. Over the years, we have been adhering to the business policy of 'customer first, pursuit of excellence, eternal innovation, and mutual benefit', and have won praises from many customers with the joint efforts of all the staff. Excellence represents excellence and the peak. There is no best, only better. It is our constant goal. Enterprise development must pursue excellence.
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