Company Advantages1. Owing to its elegant look and sturdy design, these sets are highly in demand amongst our customers.
2. Dms Seals Technology Co.,limited works hard to make the quality and performance of piston seals products more in line with the needs of customers. DMS O Ring Manufacturers strictly follows the ISO9001 international quality certification system for production management
3. Researchers work in close coordination with the production department and help hydraulic piston seals by introducing new techniques for better utilization of resources. DMS o-ring seal has advanced machines and equipment for its production
4. DMS Seal manufacturer is a technology enterprise which specialized in the R&D and production of seals. o-ring seal,pneumatic piston seals has the functions such as hydraulic piston seals sizes as compared with other similar products.
5. All the piston seals are reliable in property and reputably appraised by customers. As a modern sealing technology company, DMS Seal manufacturer has a wealth of experience
Installation Recommendation

Installation Sizes
D H8 | d h9 | L+0.2 | H |
˂96 | D-16.3 | 8 | 7.5 |
96-190 | D-20 | 10 | 9.5 |
191-380 | D-28 | 13 | 12.5 |
381-1000 | D-36 | 20 | 19.5 |
Application and properties
Apply to hydraulic piston sealing, Consisting of a seal ring, two L-shaped POM back-up rings and an acting force O-Ring. The back-up ring acts as a support and guide to ensure a tight sealing environment. High wear resistance, low friction, no crawling phenomenon, easy installation.
Sealing ring: filled PTFE
O-Ring: NBR / FKM
L-Ring: POM / PA
Working Conditions
Working Conditions |
Diameter Range | Pressure Range | Temperature Range | Speed | Medium |
3-1600mm | 0-45MPa | -30℃+100℃ | 1 m/s | hydraulic oil, flame retardant liquid, water and others |
Installation Dimensions
D H8 | d h9 | H | L | e | Order No. |
40
45
50 | 23.2
28.2
33.2 | 7.5
7.5
7.5 | 8
8
8 | 7
7
7 | DGDA40*23.2*7.5
DGDA45*28.2*7.5
DGDA50*33.2*7.5 |
56
63
65 | 39.2
46.2
48.2 | 7.5
7.5
7.5 | 8
8
8 | 7
7
7 | DGDA56*39.2*7.5
DGDA63*46.2*7.5
DGDA65*48.2*7.5 |
70
75
80 | 53.2
58.2
63.2 | 7.5
7.5
7.5 | 8
8
8 | 7
7
7 | DGDA70*53.2*7.5
DGDA75*58.2*7.5
DGDA80*63.2*7.5 |
85
90
95 | 68.2
73.2
78.2 | 7.5
7.5
7.5 | 8
8
8 | 7
7
7 | DGDA85*68.2*7.5
DGDA90*73.2*7.5
DGDA95*78.2*7.5 |
100
105
110 | 80
85
90 | 9.5
9.5
9.5 | 10
10
10 | 10
10
10 | DGDA100*80*9.5
DGDA105*85*9.5
DGDA110*90*9.5 |
115
120
125 | 95
100
105 | 9.5
9.5
9.5 | 10
10
10 | 10
10
10 | DGDA115*95*9.5
DGDA120*100*9.5
DGDA125*105*9.5 |
130
135
140 | 110
115
120 | 9.5
9.5
9.5 | 10
10
10 | 10
10
10 | DGDA130*110*9.5
DGDA135*115*9.5
DGDA140*120*9.5 |
145
150
155 | 125
130
135 | 9.5
9.5
9.5 | 10
10
10 | 10
10
10 | DGDA145*125*9.5
DGDA150*130*9.5
DGDA155*135*9.5 |
160
170
180 | 140
150
160 | 9.5
9.5
9.5 | 10
10
10 | 10
10
10 | DGDA160*140*9.5
DGDA170*150*9.5
DGDA180*160*9.5 |
190
200
210 | 170
172
182 | 9.5
12.5
12.5 | 10
13
13 | 10
12
12 | DGDA190*170*9.5
DGDA200*172*12.5
DGDA210*182*12.5 |
220
225
235 | 192
197
207 | 12.5
12.5
12.5 | 13
13
13 | 12
12
12 | DGDA220*192*12.5
DGDA225*197*12.5
DGDA235*207*12.5 |
Company Features1. Dms Seals Technology Co.,limited gathers industry elites to produce the best piston seals. - Our professional technician strictly operate machines to ensure its normal operation and produce high quality hydraulic piston seals.
2. To meet customer's requirements, DMS Seal Manufacturer always keeps the innovative technology to produce o-ring seal.
3. Dms Seals Technology Co.,limited boasts its advanced production technology. - We can customize solutions to making piston seals for your own pneumatic piston seals use.