SKF SLC Piston Seals

SKF Piston Seals

SKF Piston SealSKF 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.

SKF Piston Seals Informational PDF

SKF Double-Acting Piston Profiles

Product
Ring Info
Profile
Description
Datasheet
MPV
Slide - Polyurethane
Piston Seal: MPV
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.
MPV PDF
DPV
Slide - Polyurethane
Piston Seal: DPV
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.
DPV PDF
LPV
Slide - Polyurethane
Piston Seal: LPV
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.
LPV PDF
CPV
Slide - Polyurethane
Piston Seal: CPV Seal
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.
CPV PDF
GH
Slide - PTFE
Piston Seal: GH Seal
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.
GH PDF
APR
Slide - PTFE
Piston Seal: KP Seal
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.
APR PDF
LCP
Polyamide (PA)
PTFE slide ring
Piston Seal: LCP
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.
LCP PDF
LTP
Polyamide (PA)
Nitrile sealing ring
Piston Seal: N4/N5 U Cup
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.
LTP PDF
CUT
Polyamide (PA)
Nitrile energizer
Piston Seal: CUT
Step cut polyamide slide ring, nitrile rubber energizer; suitable for heavy duty applications and high pressures.
CUT PDF
SCP
Polyamide (PA)
Nitrile energizer
Piston Seal: SCP
Step cut polyamide slide ring, oval nitrile rubber energizer; fits wide, shallow inch size housings; suitable for heavy duty applications and high pressures.
SCP PDF
MD-L
Nitrile sealing ring
Polyester anti-extrustion
Polyacetal guide rings
Piston Seal: MD-L
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.
MD-L PDF

SKF Singe-Acting Piston Profiles

Product
Profile
Description
Datasheet
UNP
Piston Seal: UNP Seal
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.
UNP PDF

SKF Rod Seals used as Piston Profiles

Product
Profile
Description
Datasheet
PTB
Rod Seal as Piston Seal: PTB Seal
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.
PTB PDF
STD
Rod Seal as Piston Seal: STD Seal
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.
STD PDF
DZ
Rod Seal as Piston Seal: DZ Seal
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.
DZ PDF