Company Advantages1. DMS O Ring Manufacturers strictly follows the ISO9001 international quality certification system for production management. As one of the unique feature, pneumatic piston seals successfully makes hydraulic piston seals sizes more popular among customers. DMS O Ring Manufacturers strictly follows the ISO9001 international quality certification system for production management
2. Dms Seals Technology Co.,limited, well-known for its superior quality, will provide first-class service. Our products mainly include rod seals, piston seals, scraper seals, rotary seals, rubber seal products and spring seals
3. This hydraulic piston seals piston seals is acclaimed for its superior performance, easy operations and longer service life. The R&D teams have the ability to design and develop seals for various of complicated working condition of sealing system.
4. Equipped with a hydraulic cylinder piston seals, coupled by high performance hydraulic piston seals suppliers, this is the perfect hydraulic piston seals for your shop! As a modern sealing technology company, DMS Seal manufacturer has a wealth of experience
Installation Recommendation

Application and properties
Suitable for light and medium hydraulic systems, also be used for pneumatic equipment. 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 | 0-35MPa | -30℃+200℃ | 1.5 m/s | hydraulic oil, flame retardant liquid, water and others. |
Installation Dimensions
Nominal Size of Packing, and Housing dimensions | L +0.2 | Order No. |
d | D | H |
28
28.4
30 | 22
22.4
24 | 4.4
4.4
4.4 | 4.7
4.7
4.7 | SPGC28*22*4.7
SPGC28.4*22.4*4.7
SPGC30*24*4.7 |
31
31.5
34 | 25
25.5
28 | 4.4
4.4
4.4 | 4.7
4.7
4.7 | SPGC31*25*4.7
SPGC31.5*25.5*4.7
SPGC34*28*4.7 |
35
35.5
36 | 29
29.5
30 | 4.4
4.4
4.4 | 4.7
4.7
4.7 | SPGC35*29*4.7
SPGC35.5*29.5*4.7
SPGC36*30*4.7 |
37
37.5
38 | 31
31.5
32 | 4.4
4.4
4.4 | 4.7
4.7
4.7 | SPGC37*31*4.7
SPGC37.5*31.5*4.7
SPGC38*32*4.7 |
40
41
41.5 | 34
35
35.5 | 4.4
4.4
4.4 | 4.7
4.7
4.7 | SPGC40*34*4.7
SPGC41*35*4.7
SPGC41.5*35.5*4.7 |
42
44
45 | 36
38
39 | 4.4
4.4
4.4 | 4.7
4.7
4.7 | SPGC42*36*4.7
SPGC44*38*4.7
SPGC45*39*4.7 |
46
47
48 | 40
41
42 | 4.4
4.4
4.4 | 4.7
4.7
4.7 | SPGC46*40*4.7
SPGC47*41*4.7
SPGC48*42*4.7 |
50
51
52 | 44
45
46 | 4.4
4.4
4.4 | 4.7
4.7
4.7 | SPGC50*44*4.7
SPGC51*45*4.7
SPGC52*46*4.7 |
54
55
56 | 48
49
50 | 4.4
4.4
4.4 | 4.7
4.7
4.7 | SPGC54*48*4.7
SPGC55*49*4.7
SPGC56*50*4.7 |
58
60
62 | 48
50
52 | 4.4
4.4
4.4 | 4.7
4.7
4.7 | SPGC58*48*4.7
SPGC60*50*4.7
SPGC62*52*4.7 |
63
65
66 | 53
55
56 | 4.4
4.4
4.4 | 4.7
4.7
4.7 | SPGC63*53*4.7
SPGC65*55*4.7
SPGC66*56*4.7 |
68
70
72 | 58
60
62 | 7.0
7.0
7.0 | 7.5
7.5
7.5 | SPGC68*58*7.5
SPGC70*60*7.5
SPGC72*62*7.5 |
Company Features1. There is strict testing for quality of piston seals to make satisfying products for customers.
2. Our hydraulic piston seals have been well sold to all over the world known as its pneumatic piston seals. Call!