Spring Energized Seals for hydraulic fluid sealing. Designed for extreme and demanding applications.
A chart listing the most popular compounds and their fluid compatibility / technical information.
Seal & Design Canada: Toronto, Ontario 
Headquarters: Clarence, NY Hydraulic Piston Seals (SKF)
SKF SLC produces over 30 million seals each year in close to 50,000 part numbers. Piston seals maintain sealing contact between the piston and the cylinder bore. Differential pressures acting on the piston to extend or retract the piston rod can be in excess of 400 bar (5 800 psi). The pressure acting on the piston seal increases contact forces between the piston seal and cylinder surface. Therefore, the surface properties of the sealing surfaces are critical to proper seal performance.
Quality Hydraulic Piston Seal Design
When you’re looking for a high-quality piston seal for your project, look no further than Seal & Design. We offer a wide selection of piston seals to suit your needs including MPV, DPV, LPV, CPV, GH, and APR profiles. We also provide a wide range of different piston seal materials for each and every type of application.
Need Help Choosing the Right Piston Seal?
It’s important to make sure that you choose the right piston seal for your application to ensure it’s capable of working properly. Different materials operate differently under extreme pressures and temperatures. The last thing you want is to choose a piston seal only for it to malfunction or fail completely because it’s not suitable for its application.
Your piston seal material’s working temperature is one of the most important factors to consider when you’re choosing which seal to work with. A piston seal’s service life is typically reduced by up to 50% every time the fluid temperature of the application increases by 10 degrees Celsius.
This isn’t because the quality of the piston seal is sub-par but because the seal isn’t always able to work properly in higher temperatures. If you need a piston seal to operate in a high-temperature industrial environment, it’s essential that you choose the right material. If you’re unsure of what piston seal material is right for you, feel free to contact us at Seal & Design today.
Our experienced team of manufacturing professionals will be more than happy to discuss our different piston seal products with you. We know the ins and outs of seal material compatibility including fluid operating temperatures, extrusion resistance, service life expectancy, cost of procurement, ease of installation, and more.
For more information about piston seals and hydraulic piston seal design, contact Seal & Design today. We have years of experience and we feel confident we’ll be able to answer any questions you may have.
SKF DOUBLE-ACTING PISTON PROFILES
Product
Ring Info
Profile
Description
Datasheet
MPV
Slide – Polyurethane
MPV profiles have slide rings made of X-ECOPUR PS (TPU) developed for pressures up to 400 bar (5 800 psi). They are suitable for high fluid temperatures and in medium to heavy duty applications, such as earthmoving equipment. MPV profiles are available in metric sizes (→ Size list [pdf]) and some fit seal housings in accordance with ISO 7425-1:1988.
DPV
Slide – Polyurethane
DPV profiles have slide rings made of X-ECOPUR PS (TPU) developed for pressures up to 400 bar (5 800 psi). They are suitable for high fluid temperatures and for medium to heavy duty applications such as earthmoving equipment. DPV profiles are available in inch sizes where O-ring dash-number housings are used.
LPV
Slide – Polyurethane
LPV profiles have a polyether-based polyurethane (EU) slide ring that provides resistance to hydrolysis (attack from moisture) and good low temperature flexibility. The O-ring energizer provides a cost-effective sealing solution. These profiles are developed for pressures up to 250 bar (3 625 psi) and suitable for light to medium duty applications, such as agriculture and material handling applications. They are available in metric sizes and some fit seal housings in accordance with ISO 7425-1:1988.
CPV
Slide – Polyurethane
CPV profiles have a polyester-based polyurethane (AU) slide ring. These profiles are developed for pressures up to 345 bar (5 000 psi) and suitable for light to medium duty applications.
They are available in inch sizes where O-ring dash-number housings are used.
GH
Slide – PTFE
GH profiles have a nitrile rubber (NBR) energizer, which is an O-ring as standard. Rectangular energizers are available on request. These profiles are suitable for pressures up to 400 bar (5 800 psi) in medium to heavy duty applications. GH profiles are available in metric and inch sizes and some metric sizes fit seal housings in accordance with ISO 7425-1:1988.
APR
Slide – PTFE
APR profiles have a nitrile rubber (NBR) O-ring energizer. The PTFE slide ring incorporates an NBR X-ring to improve sealing performance. They are suitable for pressures up to 350 bar (5 075 psi) in medium to heavy duty applications. APR profiles are available in metric and inch sizes and some metric sizes fit seal housings in accordance with ISO 7425-1:1988.
LCP
Polyamide (PA)
PTFE slide ring
PTFE slide ring supported by polyamide anti-extrusion rings, nitrile rubber energizer; very good gap extrusion resistance; suitable for heavy duty applications and high pressures.
LTP
Polyamide (PA)
Nitrile sealing ring
Sealing ring made of nitrile rubber, supported by polyamide anti-extrusion rings; good gap extrusion resistance; fits O-ring dash-number housings; suitable for medium to heavy duty applications and high pressures.
CUT
Polyamide (PA)
Nitrile energizer
Step cut polyamide slide ring, nitrile rubber energizer; suitable for heavy duty applications and high pressures.
SCP
Polyamide (PA)
Nitrile energizer
Step cut polyamide slide ring, oval nitrile rubber energizer; fits wide, shallow inch size housings; suitable for heavy duty applications and high pressures.
MD-L
Nitrile sealing ring
Polyester anti-extrustion
Polyacetal guide rings
Five-piece compact set consisting of a nitrile rubber sealing ring, integrated polyester elastomer anti-extrusion rings and polyacetal guide rings; suitable for medium duty applications.
SKF SINGE-ACTING PISTON PROFILES
Product
Profile
Description
Datasheet
UNP
Polyurethane U-cup profile; single-acting; may be used in double-acting cylinders when using two seals in back-to-back arrangement; suitable for medium duty applications.
SKF SINGE-ACTING PISTON PROFILES
Product
Profile
Description
Datasheet
PTB
PTB profiles are made of LUBRITHANE (TPU). They are suitable for pressures up to 400 bar (5 800 psi) in medium duty applications and are available in metric and inch sizes. Some metric sizes fit seal housings in accordance with ISO 5597:2010.
STD
STD profiles are made of LUBRITHANE (TPU). They are suitable for pressures up to 400 bar (5 800 psi) in medium duty applications and can also be used as a heavy duty static seal or a snap-in wiper seal. These profiles are available in inch sizes where narrower seal housings are used.
DZ
DZ profiles combine an NBR primary sealing ring with a LUBRITHANE (TPU) secondary sealing ring into one seal. This combination provides a good low temperature resilience and is suitable for pressures up to 400 bar (5 800 psi) in medium to heavy duty applications.
Headquarters: Clarence, NY
Seal & Design Canada: Toronto, Ontario
