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. As a modern sealing technology company, DMS Seal manufacturer has a wealth of experience
3. The high pressure seals have strong wear resistance to hard conditions. Our piston seals,hydraulic piston seals boasts its excellent performance of hydraulic cylinder piston seals.
4. We use our knowledge, market maps and expertise to identify hydraulic piston seals developments for your product and objectively track it throughout its entire product lifecycle, looking for a unique set of potential growth opportunity areas. Our products mainly include 
rod seals, piston seals, scraper seals, rotary seals, rubber seal products and spring seals
Installation Recommendation
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Application and properties
Standard double acting sealing, a wide range of applications. Friction resistance is very low, no crawling phenomenon, strong wear resistance, and saving installation space.
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 | 
| 3031.5
 32
 | 20.522
 22.5
 | 4.34.3
 4.3
 | 4.54.5
 4.5
 | SPG30*20.5*4.5SPG31.5*22*4.5
 SPG32*22.5*4.5
 | 
| 3535.5
 40
 | 25.526
 30
 | 4.34.3
 4.3
 | 4.54.5
 4.5
 | SPG35*25.5*4.5SPG35.5*26*4.5
 SPG40*30*4.5
 | 
| 4550
 55
 | 3540
 45
 | 4.34.3
 4.3
 | 4.54.5
 4.5
 | SPG45*35*4.5SPG50*40*4.5
 SPG55*45*4.5
 | 
| 5660
 63
 | 4650
 48
 | 4.34.3
 7.3
 | 4.54.5
 7.5
 | SPG56*46*4.5SPG60*50*4.5
 SPG63*48*7.5
 | 
| 6569
 70
 | 5054
 55
 | 7.37.3
 7.3
 | 7.57.5
 7.5
 | SPG65*50*7.5SPG69*54*7.5
 SPG70*55*7.5
 | 
| 7175
 80
 | 5660
 65
 | 7.37.3
 7.3
 | 7.57.5
 7.5
 | SPG71*56*7.5SPG75*60*7.5
 SPG80*65*7.5
 | 
| 8590
 95
 | 7075
 80
 | 7.37.3
 7.3
 | 7.57.5
 7.5
 | SPG85*70*7.5SPG90*75*7.5
 SPG95*80*7.5
 | 
| 100105
 108
 | 8590
 92
 | 7.37.3
 7.3
 | 7.57.5
 7.5
 | SPG100*85*7.5SPG105*90*7.5
 SPG108*92*7.5
 | 
| 110112
 120
 | 9496
 104
 | 7.37.3
 7.3
 | 7.57.5
 7.5
 | SPG110*94*7.5SPG112*96*7.5
 SPG120*104*7.5
 | 
| 125130
 135
 | 109114
 119
 | 7.37.3
 7.3
 | 7.57.5
 7.5
 | SPG125*109*7.5SPG130*114*7.5
 SPG135*119*7.5
 | 
| 140145
 150
 | 124129
 134
 | 7.37.3
 7.3
 | 7.57.5
 7.5
 | SPG140*124*7.5SPG145*129*7.5
 SPG150*134*7.5
 | 
| 155160
 170
 | 139144
 148
 | 7.37.3
 10.8
 | 7.57.5
 11
 | SPG155*139*7.5SPG160*144*7.5
 SPG170*148*11
 | 
 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. Check it!