Company Advantages1. We have developed solutions of the sealing of special working condition. As one of the unique feature, pneumatic piston seals successfully makes hydraulic piston seals sizes more popular among customers. We have developed solutions of the sealing of special working condition
2. Dms Seals Technology Co.,limited, well-known for its superior quality, will provide first-class service. To reduce costs with high-efficiency work is the DMS's purpose
3. DMS Seals provides professional design and production of high-grade o-ring seals. The sales volume of piston seals,hydraulic piston seals keeps stable increase over the years with the help of hydraulic cylinder piston seals.
4. Comparing with common hydraulic piston seals, hydraulic piston seals suppliers has more features. DMS Seals takes the lead in grasping the development trend of the industry
5. o-ring seal poses almost no threat to human health. We can support OEM and ODM
Installation Recommendation

Installation Sizes
Bore Diameter DN H9 | Groove Diameter | Groove Width | Radius | Radial Clearance S max. | O-Ring Cross-Section |
Standard Application | Light Application | Heavy Duty Application | d1 h9 | L1+0.2 | R1 | 10MPa | 20MPa | 40MPa | d2 |
8-14.9 | 15-39.9 | - | DN-4.9 | 2.2 | 0.4 | 0.3 | 0.20 | 0.15 | 1.78 |
15-39.9 | 40-79.9 | - | DN-7.5 | 3.2 | 0.6 | 0.4 | 0.25 | 0.15 | 2.62 |
40-79.9 | 80-132.9 | 15-39.9 | DN-11.0 | 4.2 | 1.0 | 0.4 | 0.25 | 0.20 | 3.53 |
80-132.9 | 133-329.9 | 40-79.9 | DN-15.5 | 6.3 | 1.3 | 0.5 | 0.30 | 0.20 | 5.33 |
133-329.9 | 330-699.9 | 80-132.9 | DN-21.0 | 8.1 | 1.8 | 0.6 | 0.35 | 0.25 | 7.00 |
330-669.9 | 670-99.9 | 133-329.9 | DN-24.5 | 8.1 | 1.8 | 0.6 | 0.35 | 0.25 | 7.00 |
670-999.9 | ≥1000 | 330-669.9 | DN-28.0 | 9.5 | 2.5 | 0.7 | 0.50 | 0.30 | 8.40 |
≥1000 | ≥1000 | ≥1000 | DN-38.0 | 13.8 | 3.0 | 1.0 | 0.70 | 0.60 | 12.00 |
Application and properties
Standard double acting seal. Suitable for reciprocating motion, allowing larger extrusion clearances, has wide application. Dynamic and static sealing property are excellent, be able to work in dusty condition. Low friction, simple groove, strong adaptability to work conditions.
Sealing ring: filled PTFE
O-ring: NBR / FKM
Working Conditions
Working Conditions |
Diameter Range | Pressure Range | Temperature Range | Speed | Medium |
3-1600mm | 0-60MPa | -45℃ +200℃ | 15 m/s | hydraulic oil, flame retardant liquid, water and others |
Installation Dimensions
Bore Dia. | Groove Dia. | Groove Width | Order No. | O-Ring Dimensions |
DN H9 | d1 h9 | L1+0.2 |
8
10
12 | 3.1
5.1
7.1 | 2.2
2.2
2.2 | GSF8*3.1*2.2
GSF10*5.1*2.2
GSF12*7.1*2.2 | 2.90*1.78
4.80*1.8
6.70*1.8 |
14
15
15 | 9.1
10.1
7.5 | 2.2
2.2
3.2 | GSF14*9.1*2.2
GSF15*10.1*2.2
GSF15*7.5*3.2 | 8.75*1.8
7.59*2.62
8.75*1.8 |
16
16
18 | 11.1
8.5
13.1 | 2.2
3.2
2.2 | GSF16*11.1*2.2
GSF16*8.5*3.2
GSF18*13.1*2.2 | 10.82*1.78
7.59*2.62
12.42*1.78 |
18
20
20 | 10.5
15.1
12.5 | 3.2
2.2
3.2 | GSF18*10.5*3.2
GSF20*15.1*2.2
GSF20*12.5*3.2 | 9.19*2.62
14.00*1.78
12.37*2.62 |
24
24
25 | 19.1
16.5
17.5 | 2.2
3.2
3.2 | GSF24*19.1*2.2
GSF24*16.5*3.2
GSF25*17.5*3.2 | 18.77*1.78
15.54*2.62
17.12*2.62 |
25
28
28 | 14
20.5
17 | 4.2
3.2
4.2 | GSF25*14*4.2
GSF28*20.5*3.2
GSF28*17*4.2 | 13.87*3.53
20.29*2.62
15.47*3.53 |
30
30
32 | 22.5
19
24.5 | 3.2
4.2
3.2 | GSF30*22.5*3.2
GSF30*19*4.2
GSF32*24.5*3.2 | 21.89*2.62
26.70*1.78
23.47*2.62 |
32
35
35 | 21
27.5
24 | 4.2
3.2
4.2 | GSF32*21*4.2
GSF35*27.5*3.2
GSF35*24*4.2 | 20.22*3.53
26.64*2.62
23.40*3.53 |
36
36
38 | 28.5
25
30.5 | 3.2
4.2
3.2 | GSF36*28.5*3.2
GSF36*25*4.2
GSF38*30.5*3.2 | 28.24*2.62
23.39*3.53
29.82*2.62 |
38
40
40 | 27
32.5
29 | 4.2
3.2
4.2 | GSF38*27*4.2
GSF40*32.5*3.2
GSF40*29*4.2 | 25.86*3.53
31.42*2.62
28.17*3.53 |
45
45
48 | 37.5
34
40.5 | 3.2
4.2
3.2 | GSF45*37.5*3.2
GSF45*34*4.2
GSF48*40.5*3.2 | 36.5*2.62
32.92*3.53
36.09*3.53 |
48
50
50 | 37
39
34.5 | 4.2
4.2
6.3 | GSF48*37*4.2
GSF50*39*4.2
GSF50*34.5*6.3 | 36.09*3.53
37.70*3.53
32.69*5.33 |
52
52
55 | 41
36.5
44 | 4.2
6.3
4.2 | GSF52*41*4.2
GSF52*36.5*6.3
GSF55*44*4.2 | 40.87*3.53
35*5.33
44.04*3.53 |
55
56
56 | 39.5
45
40.5 | 6.3
4.2
6.3 | GSF55*39.5*6.3
GSF56*45*4.2
GSF56*40.5*6.3 | 38*5.33
44.04*3.53
39*5.33 |
60
60
63 | 49
44.5
52 | 4.2
6.3
4.2 | GSF60*49*4.2
GSF60*44.5*6.3
GSF63*52*4.2 | 47.22*3.53
42.5*5.33
50.39*3.53 |
63
64
64 | 47.5
53
48.5 | 6.3
4.2
6.3 | GSF63*47.5*6.3
GSF64*53*4.2
GSF64*48.5*6.3 | 46*5.33
51.5*3.53
46.99*5.33 |
65
65
70 | 54
49.5
59 | 4.2
6.3
4.2 | GSF65*54*4.2
GSF65*49.5*6.3
GSF70*59*4.2 | 53.57*3.53
48*5.33
56.74*3.53 |
70
75
75 | 54.5
64
59.5 | 6.3
4.2
6.3 | GSF70*54.5*6.3
GSF75*64*4.2
GSF75*59.5*6.3 | 53.34*5.33
63.09*3.53
56.52*5.33 |
80
80
85 | 69
64.5
74 | 4.2
6.3
4.2 | GSF80*69*4.2
GSF80*64.5*6.3
GSF85*74*4.2 | 66.27*3.53
62.87*5.33
72.62*3.53 |
85
90
90 | 69.5
79
74.5 | 6.3
4.2
6.3 | GSF85*69.5*6.3
GSF90*79*4.2
GSF90*74.5*6.3 | 69.22*5.33
78.97*3.53
72.39*5.33 |
95
95
100 | 84
79.5
89 | 4.2
6.3
4.2 | GSF95*84*4.2
GSF95*79.5*6.3
GSF100*89*4.2 | 82.14*3.53
78.74*5.33
88.49*3.53 |
100
105
105 | 84.5
94
89.5 | 6.3
4.2
6.3 | GSF100*84.5*6.3
GSF105*94*4.2
GSF105*89.5*6.3 | 81.92*5.33
91.67*3.53
88.27*5.33 |
Company Features1. Fully specialized in the R&D and production of piston seals, Dms Seals Technology Co.,limited is globally recognized. - There is strict testing for quality of hydraulic piston seals to make satisfying products for customers.
2. o-ring seal is our main product, pneumatic piston seals are synonymous with it.
3. Not To Advance Is To Go Back. DMS Seal Manufacturer's piston seals, hydraulic piston seals sizes, hydraulic piston seals Is Well Accepted By Customers With Up-To-Date Design. Get Price! - Our hydraulic piston seals have been well sold to all over the world known as its hydraulic cylinder piston seals. Call!