Merkel Piston Seals

 

 

 

 

 

 

 

 

The piston seals of Freudenberg Sealing Technologies can be used in a variety of modern sealing systems: Their task is to seal the piston reliably against the cylinder tube and guarantee its movement efficiently with minimum friction and no drift. The piston seals persuade due to their durability and high functionality. They are suitable for all kinds of requirements.

PRODUCT DESCRIPTION

Two-piece Merkel seal set comprising an elastomer U-ring with a fabric reinforcement on the contact area up to over the sealing edge and an active back-up ring

PRODUCT ADVANTAGES

Single-acting piston seal for use in hydraulics or pneumatics.

  • Low friction due to fabric reinforcement
  • Large range of dimensions
  • Activated back-up ring prevents extrusion

PRODUCT DESCRIPTION

Two-piece Merkel seal set comprising an elastomer U-ring with an elastomer sealing edge, a fabric reinforcement on the contact area and an active back-up ring.

PRODUCT ADVANTAGES

  • Low friction due to fabric reinforcement
  • Large range of dimensions
  • Activated back-up ring prevents extrusion

PRODUCT DESCRIPTION

Multi-part Merkel Chevron Seal Set comprising one thrust ring, one or two seals and a back-up ring.

PRODUCT ADVANTAGES

Seal set for robust operating conditions, predominantly the provision of spare parts for older plant. Merkel Chevron Seal Set EK, EKV can be used for pistons with pressure on one side or "back to back" for pistons with pressure on both sides.

  • Proven under extreme conditions
  • High durability
  • Can be optimally adjusted to the related application
  • Functions over a certain time period even with poorer surfaces
  • Insensitive to soiling
  • For application and design related reasons, fluctuations in the leakage behaviour and in the friction behaviour are to be expected

PRODUCT DESCRIPTION

Multi-part Merkel Chevron Seal Set comprising one thrust ring, one or two seals and a back-up ring.

PRODUCT ADVANTAGES

Seal set for robust operating conditions, predominantly the provision of spare parts for older plant. Merkel Chevron Seal Set EK, EKV can be used for pistons with pressure on one side or "back to back" for pistons with pressure on both sides.

  • Proven under extreme conditions
  • High durability
  • Can be optimally adjusted to the related application
  • Functions over a certain time period even with poorer surfaces
  • Insensitive to soiling
  • For application and design related reasons, fluctuations in the leakage behaviour and in the friction behaviour are to be expected

PRODUCT DESCRIPTION

Two-part seal set for sealing pistons, consisting of a PA slide ring with a stepped cut and an elastomer contact pressure element for producing pre-load.

 

PRODUCT ADVANTAGES

  • Extreme strength against gap extrusion thanks to the PA sliding component
  • Extremely high abrasion resistance
  • Stepped cut for easy fitting in a closed housing
  • Greater surface roughness partly permissible in comparison to conventional seals
  • Rectangular contact pressure element produces consistently high pre-loading force and offers high protection against twisting in the housing
  • Housings should preferably comply with ISO 7425-1
  • Dynamic and static tightness comparable to PTFE piston seals

PRODUCT DESCRIPTION

Four-piece Merkel Compact Seal L 27 comprising one pre-load component (NBR), two active back-up rings (POM) and one PTFE bronze profile ring.

PRODUCT ADVANTAGES

The Merkel Piston Seal L 27 is used where a piston has pressure on both sides. The activated back-up rings offer good protection against extrusion even with gaps for breathing.

  • Bridges large radial gaps
  • Very good protection against extrusion even with pressure peaks
  • High resistance to abrasion
  • Low friction, free of stick-slip
  • High contact pressure due to elastomer profile ring

PRODUCT DESCRIPTION

Five-piece Merkel compact seal L 43 comprising one profile ring, two back-up rings and two angled bushes.

PRODUCT ADVANTAGES

The Merkel Piston Seal L 43 is used for sealing pistons with pressure on both sides. The angled rings guide the piston on the cylinder bore.

  • No extrusion into the radial sealing gap
  • Suitable for rapid pressure change
  • Sealing component protected against twisting

PRODUCT DESCRIPTION

Merkel U-ring with asymmetrical profile of the sealing lips.

PRODUCT ADVANTAGES

Single-acting piston seal, preferably for spare parts requirement.

PRODUCT DESCRIPTION

Merkel U-ring with asymmetrical profile of the sealing lips and back-up ring as a gap sealing component.

PRODUCT ADVANTAGES

Single-acting piston seal for medium load, preferably for spare parts requirement.

PRODUCT DESCRIPTION

Merkel U-ring with asymmetrical profile, outer lip set back and press fit at the inside diameter.

PRODUCT ADVANTAGES

Single-acting piston seal for standardised housings, amongst others, according to ISO 5597.

  • Very good static and dynamic tightness

PRODUCT DESCRIPTION

Merkel U-ring with asymmetrical profile of the sealing lips, fabric reinforcement on the dynamic sealing side and back-up ring as a gap sealing component.

PRODUCT ADVANTAGES

Single-acting piston seal for medium load, preferably for spare parts requirement.

PRODUCT DESCRIPTION

Two-piece Merkel seal set for sealing pistons, consisting of one PTFE profile ring and an O-ring as a pre-load component

PRODUCT ADVANTAGES

Merkel Omegat OMK-E can be used where a sealing piston has pressure on one side, amongst others, in standardised housings according to ISO 7425/1. Rod diameters in agreement with ISO 3320.

  • Very high resistance to pressure and hardness
  • Good thermal conductivity
  • Very good protection against extrusion
  • High resistance to abrasion
  • Low friction, free of stick-slip

PRODUCT DESCRIPTION

Two-piece Merkel seal set for sealing pistons, consisting of one PTFE profile ring and an elastomer profile ring as a pre-load component.

PRODUCT ADVANTAGES

The Merkel Omegat OMK-ES is for use where sealing pistons have pressure on one side. The Merkel Omegat OMK-ES series is designed especially for large diameters and for heavy duty hydraulic applications

  • Very high resistance to pressure
  • Design prevents twisting
  • Very good protection against extrusion
  • High resistance to abrasion
  • Good thermal conductivity
  • Low friction, free of stick-slip
  • High contact pressure due to elastomer profile ring

PRODUCT DESCRIPTION

Two-piece Merkel seal set for sealing pistons, consisting of one PTFE profile ring and an O-ring as a pre-load component.

PRODUCT ADVANTAGES

Merkel Omegat OMK-MR is used where a piston has pressure on both sides. OMK-MR is provided with pressure-compensation grooves for rapid pressure change.

  • Very high resistance to pressure and hardness
  • Good thermal conductivity
  • Very good protection against extrusion
  • High resistance to abrasion
  • Low friction, free of stick-slip

PRODUCT DESCRIPTION

Two-piece Merkel piston seal set comprising one polyurethane profile ring with one O-ring as a pre-load component.

PRODUCT ADVANTAGES

Merkel Omegat OMK-PU is used for sealing pistons with pressure on both sides for medium duty applications, and is also designed for housings according to ISO 7425 , Part 1.

  • Increased sealing effect
  • Robust design
  • Requires small housing
  • Easy fitting

PRODUCT DESCRIPTION

Two-piece Merkel seal set for sealing pistons consisting of one PTFE profile ring and one elastomer profile ring as a pre-load component. The seal set is designed for heavy duty hydraulic applications.

PRODUCT ADVANTAGES

The Merkel Omegat OMK-S can be used where a piston has pressure on both sides and is designed especially for large diameters.

  • Very high resistance to pressure
  • Design prevents twisting
  • Very good protection against extrusion
  • High resistance to abrasion
  • Good thermal conductivity
  • Low friction, free of stick-slip
  • High contact pressure due to elastomer profile ring

PRODUCT DESCRIPTION

Two-piece Merkel Compact Seal Simko 300 comprising one profile ring with pronounced sealing edge and one contact pressure element for producing the pre-load.

 

PRODUCT ADVANTAGES

  • Double-acting Merkel piston seal
  • Good static and dynamic tightness
  • Low friction, smooth movement even at low running speeds
  • Contact pressure element with rectangular cross-section, prevents twisting in the housing
  • Standardised housings according to ISO 7425
  • Low axial housing heights

PRODUCT DESCRIPTION

Three-piece Merkel Compact Seal Simko 320 X2 consisting of a fabric reinforced elastomeric sealing element and two guide back-up rings

PRODUCT ADVANTAGES

Double-acting Merkel piston seal with integrated guide back-up rings

PRODUCT DESCRIPTION

Three-piece Merkel Compact Seal Simko 520 consisting of a fabric reinforced elastomeric sealing element and two guide back-up rings as gap sealing component.

PRODUCT ADVANTAGES

Double-acting Merkel piston seal, preferably for spare parts requirement.

PRODUCT DESCRIPTION

Merkel U-ring with integrated back-up ring, asymmetrical profile with pressure-relieving grooves, outer lip set back and press fit at the inside diameter.

PRODUCT ADVANTAGES

Single-acting piston seal also for standardised housings according to ISO 5597.

  • Very good static and dynamic tightness
  • High extrusion resistance (back-up ring)
  • "back-to-back" arrangement for pistons with pressure on both sides
  • High reliability
  • Relief grooves against dynamic drag pressure

PRODUCT DESCRIPTION

Three-piece Merkel Compact Seal T 19 with two angled bushes (POM) and one sealing component of polyurethane.

PRODUCT ADVANTAGES

The Merkel Compact Seal T 19 is used where a piston has pressure on both sides and is designed mainly for housings according to ISO 6547.

  • Good guiding
  • Highly wear-resistant
  • Easy fitting
  • Short

PRODUCT DESCRIPTION

Double-acting Merkel Compact Seal T 42 with back-up rings.

PRODUCT ADVANTAGES

Merkel Compact Seal T 42 for sealing pistons which can be pressurised on both sides in plungers, pushers and subsidiary cylinders in self-advancing support systems.

  • Very good protection against extrusion even with pressure peaks
  • High resistance to abrasion
  • High contact pressure due to rubber profile ring

PRODUCT DESCRIPTION

Double-acting Merkel Compact Seal T 44 with semi-active angle back-up rings.

PRODUCT ADVANTAGES

Merkel Compact Seal T 44 for sealing pistons which can be pressurised on both sides in plungers, pushers and subsidiary cylinders in self-advancing support systems.

  • Very good protection against extrusion even with pressure peaks
  • High resistance to abrasion
  • High contact pressure due to rubber profile ring

PRODUCT DESCRIPTION

Spring-loaded lip seal. Clamping flange for axial fixing in the housing.

PRODUCT ADVANTAGES

Single-acting piston seal for secondary applications and for spare parts requirement.

PRODUCT DESCRIPTION

Lip seal. Clamping flange for axial fixing in the housing.

PRODUCT ADVANTAGES

Single-acting piston seal for secondary applications and for spare parts requirement.

PRODUCT DESCRIPTION

Merkel Complete Piston TDUOH with steel base plate and vulcanised, spring-loaded sealing lips.

PRODUCT ADVANTAGES

Merkel complete piston for secondary hydraulic applications, preferably for spare parts requirement. Can only absorb low lateral forces.

PRODUCT DESCRIPTION

Two-piece Merkel Compact Seal TFMA comprising a profile ring and O-ring as a pre-load component.

PRODUCT ADVANTAGES

Double-acting piston seal for the lower pressure range with the properties of;

  • Low friction
  • Low housing height

PRODUCT DESCRIPTION

Merkel U-ring with asymmetrical profile, inner lip set back and press fit at the outer diameter.

PRODUCT ADVANTAGES

Single-acting piston seal for hydraulic cylinders used in heavy machinery areas. The highly wear-resistant polyurethane material allows for use under high operating requirements.

  • Good media resistance
  • Broad range of temperatures
  • Very good static and dynamic tightness
  • No mould tools required
  • Large range of dimensions

PRODUCT DESCRIPTION

Single-acting Merkel U-Ring TMP 21 made from polyurethane.

PRODUCT ADVANTAGES

Piston seal that is primarily used in pneumatic cylinders in heavy-duty mechanical engineering. The U-rings are designed for application of pressure on one side.

  • High tightness
  • Large range of dimensions
  • Suitable for dry air
  • No mould tools required