Company Advantages1. High-end talents and advanced technology have enabled DMS o-ring seal quality to reach the industry's leading level. As one of the unique feature, pneumatic piston seals successfully makes hydraulic piston seals sizes more popular among customers. High-end talents and advanced technology have enabled DMS o-ring seal quality to reach the industry's leading level
2. Dms Seals Technology Co.,limited, well-known for its superior quality, will provide first-class service. DMS Seals provides professional design and production of high-grade o-ring seals
3. piston seals has competitive price which is able to make your cost recover quickly. Our products mainly include rod seals, piston seals, scraper seals, rotary seals, rubber seal products and spring seals
4. The R&D teams have the ability to design and develop seals for various of complicated working condition of sealing system. The feature provided by hydraulic piston seals makes hydraulic piston seals,hydraulic cylinder piston seals being widely applied in many different situations.
5. DMS Seals' production equipment and test equipment are on the leading level in the industry. o-ring seal,hydraulic piston seals suppliers is easy to adjust its height for different types of people.
Installation Recommendation

Installation Sizes
Bore Diameter | Groove Diameter | Groove Width | Radius | Radial Clearance S max. |
D H8 | d h8 | L1+0.2 | R1 | 16MPa | 26MPa | 32MPa | 40MPa |
55.0-149.9 | D-10.0 | 10.0 | 0.4 | 0.60 | 0.50 | 0.40 | 0.40 |
150.0-244.9 | D-12.5 | 12.5 | 0.4 | 0.75 | 0.65 | 0.55 | 0.50 |
245.0-500.0 | D-15.0 | 15.0 | 0.8 | 0.75 | 0.65 | 0.55 | 0.50 |
500.1-760.0 | D-17.5 | 17.5 | 1.2 | 0.75 | 0.65 | 0.55 | 0.50 |
760.1-999.9 | D-20.0 | 20.0 | 1.2 | 0.80 | 0.70 | 0.60 | 0.55 |
≧1000 | D-20.0 | 20.5 | 1.2 | 0.80 | 0.70 | 0.60 | 0.55 |
Application and properties
Applied to the hydraulic cylinder of heavy machinery and metallurgical equipment. Pressure resistance and corrosion resistance are strong, good thermal conductivity,structure anti-distortion, low friction, no crawling phenomenon.
Sealing ring: filled PTFE
O-Ring: NBR / FKM
Working Conditions
Working Conditions |
Diameter Range | Pressure Range | Temperature Range | Speed | Medium |
3-1600mm | 0-60MPa | -30℃+100℃ | 5 m/s | hydraulic oil, flame retardant liquid, water and others |
Installation Dimensions
Bore Dia. | Groove Dia. | Groove Width | Order No. |
D H8 | d h8 | L+0.2 |
55
60
70 | 40
45
55 | 10
10
10 | GSF-W55*40*10
GSF-W60*45*10
GSF-W70*55*10 |
80
90
100 | 60
70
80 | 10
10
10 | GSF-W80*60*10
GSF-W90*70*10
GSF-W100*80*10 |
110
115
120 | 90
95
100 | 10
10
10 | GSF-W110*90*10
GSF-W115*95*10
GSF-W120*100*10 |
130
140
150 | 110
120
125 | 10
10
12.5 | GSF-W130*110*10
GSF-W140*120*10
GSF-W150*125*12.5 |
160
165
170 | 135
140
145 | 12.5
12.5
12.5 | GSF-W160*135*12.5
GSF-W165*140*12.5
GSF-W170*145*12.5 |
180
185
190 | 155
160
165 | 12.5
12.5
12.5 | GSF-W180*155*12.5
GSF-W185*160*12.5
GSF-W190*165*12.5 |
200
205
210 | 175
180
185 | 12.5
12.5
12.5 | GSF-W200*175*12.5
GSF-W205*180*12.5
GSF-W210*185*12.5 |
215
220
225 | 190
195
200 | 12.5
12.5
12.5 | GSF-W215*190*12.5
GSF-W220*195*12.5
GSF-W225*200*12.5 |
230
240
245 | 205
215
215 | 12.5
12.5
15 | GSF-W230*205*12.5
GSF-W240*215*12.5
GSF-W245*215*15 |
Company Features1. Fully specialized in the R&D and production of piston seals, Dms Seals Technology Co.,limited is globally recognized.
2. There is strict testing for quality of hydraulic piston seals to make satisfying products for customers.
3. Our o-ring seal have been well sold to all over the world known as its pneumatic piston seals. Get more info!