Merkel Rod Seals
The rod seals of Freudenberg Sealing Technologies persuade with their durability and high efficiency. They are primarily used in pneumatic and hydraulic cylinders. Their task is to seal the retracting and extending cylinder rod, thereby preventing the pressurised operating medium from escaping from the cylinder while protecting the cylinder from impurities. The rod seals are available for every type of cylinder and application.
PRODUCT DESCRIPTION
Merkel U-ring with asymmetrical profile, inner lip set back and press fit at the outside diameter.
PRODUCT ADVANTAGES
Single-acting rod seal for standardised housings, amongst others, according to ISO 5597, very suitable as a secondary seal within a sealing system.
- Good media resistance
- Wide operating temperature range
- Very good static and dynamic tightness
- Low breakaway force (in comparison to compact seals or U- rings with secondary sealing edge in corresponding material)
- Dynamic deformation value
PRODUCT DESCRIPTION
Single-piece rod seal with a rubber head set in the fabric part.
PRODUCT ADVANTAGES
Compact rod seal, also for standardised housings according to ISO 5597.
- Easy to fit
- Excellent sealing effect also in the lower pressure range
- Low friction due to the fabric part
PRODUCT DESCRIPTION
Two-piece Merkel seal set made of PTFE profile ring with one O-ring as a pre-load component.
PRODUCT ADVANTAGES
Rod seal used in particular in a sealing system.
- Very high resistance to pressure
- Good thermal conductivity
- Very good extrusion resistance
- High resistance to abrasion
- Low friction, free of stick-slip
PRODUCT DESCRIPTION
Multi-component Merkel seal set for sealing piston rods, consisting of a pressure ring, at least 3 seals and a back-up ring. The Merkel Chevron Seal Sets are available in 3 different designs.
- Type A has 3 to 5 fabric roof-shaped seals and can be installed in adjustable or non-adjustable sealing areas.
- Type B has 3 to 5 fabric roof-shaped seals, one rubber-sprung back-up ring and is installed in non-adjustable sealing areas. Constant axial pre-load.
- Type C has 2 to 4 fabric roof-shaped seals, one rubber seal and can be installed in adjustable and non-adjustable sealing areas. For an enhanced sealing effect. Type A and Type B can be supplied in open form. Type C is always delivered in endless form
PRODUCT ADVANTAGES
- Seal set for robust operating conditions, mainly for provision of spare parts to old plant.
- Proven under extreme conditions
- Long service life
- Can be optimally adjusted to the related application
- Functions over a certain time period even with poorer surfaces
- For application and design-related reasons fluctuations in the leakage behaviour and friction behaviour are to be expected
PRODUCT DESCRIPTION
Multi-component Merkel seal set for sealing piston rods, consisting of a pressure ring, at least 3 seals and a back-up ring. The Merkel Chevron Seal Sets are available in 3 different designs.
- Type A has 3 to 5 fabric roof-shaped seals and can be installed in adjustable or non-adjustable sealing areas.
- Type B has 3 to 5 fabric roof-shaped seals, one rubber-sprung back-up ring and is installed in non-adjustable sealing areas. Constant axial pre-load.
- Type C has 2 to 4 fabric roof-shaped seals, one rubber seal and can be installed in adjustable and non-adjustable sealing areas. For an enhanced sealing effect. Type A and Type B can be supplied in open form. Type C is always delivered in endless form
PRODUCT ADVANTAGES
- Seal set for robust operating conditions, mainly for provision of spare parts to old plant.
- Proven under extreme conditions
- Long service life
- Can be optimally adjusted to the related application
- Functions over a certain time period even with poorer surfaces
- For application and design-related reasons fluctuations in the leakage behaviour and friction behaviour are to be expected
PRODUCT DESCRIPTION
Merkel polyurethane U-ring with asymmetrical profile, shortened inner lip and second support edge and sealing edge as well as press fit at the outside diameter.
PRODUCT ADVANTAGES
Single-acting rod seal, also for standardised housings according to ISO 5597.
- Highly wear-resistant
- Good media resistance
- Wide operating temperature range
- Very good static and dynamic tightness
- (Note: low deformation value, therefore not suitable for sealing systems)
PRODUCT DESCRIPTION
Merkel compact seal with asymmetrical profile.
PRODUCT ADVANTAGES
Single-acting rod seal for standardised housings, amongst others, according to ISO 5597.
- Very good static and dynamic tightness
- Compact compression, higher surface roughness in the groove base is permitted
- Designed for radially restricted housings
PRODUCT DESCRIPTION
Merkel compact seal with integrated back-up ring, additional support edge and sealing edge, components for axial fixing in the housing and press fit at the outside diameter.
PRODUCT ADVANTAGES
Single-acting rod seal for heavy duty applications, dimensions for standardised housings, amongst others, according to ISO 5597.
- Very good static and dynamic tightness
- High pressures and larger gap widths permissible
- Compact compression, higher surface roughness in the groove base possible
- Additional sealing edge prevents ingress of dirt to a large degree
- Low deformation value, use in combination with single-acting wipers recommended
PRODUCT DESCRIPTION
Merkel U-ring with asymmetrical profile, inner lip set back, grooved contact surface on the inside diameter as well as press fit at the outside diameter.
PRODUCT ADVANTAGES
Single-acting rod seal for standardised housings, amongst others, according to ISO 5597.
- Very good static and dynamic tightness
- Low friction, smooth movement even at low running speeds, dynamic deformation value
- Use as an individual seal or secondary seal in sealing systems possible
PRODUCT DESCRIPTION
Merkel U-ring with asymmetrical profile of the sealing lips.
PRODUCT ADVANTAGES
Single-acting rod seal, for applications such as standardised housings according to ISO 5597; preferably for spare parts requirements.
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 rod seal for medium loads, predominantly for spare parts requirements.
PRODUCT DESCRIPTION
Merkel U-ring with asymmetrical profile, inner lip set back, additional support edge and sealing edge as well as press fit at the outside diameter.
PRODUCT ADVANTAGES
Single-acting rod seal for standardised housings, amongst others, according to ISO 5597.
- Very good static and dynamic tightness
- Additional sealing edge, prevents ingress of dirt to a large degree
- Recommended for use in combination with single-acting wipers
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 rod seal for medium loads, predominantly for spare parts requirements.
PRODUCT DESCRIPTION
Two-component Merkel seal set for sealing piston rods, consisting of one PTFE profile ring with integrated pressure-relief function and an elastomer ring as pre-load component. Patented product design (patent no.: DE 10117662 CI).
PRODUCT ADVANTAGES
- Can be exchanged with operating environments of the Merkel Omegat OMS-MR Series.
- Increased operating reliability of sealing systems with demanding operating parameters (no continuously pressure build-up in gap area)
- Extended service life of sealing systems by long-term stability (reduced loading of the sealing system by minimised friction and wear)
PRODUCT DESCRIPTION
Two-piece Merkel seal set for sealing piston rods, consisting of a profile ring with an elastomer profile ring as a pre-load component.
PRODUCT ADVANTAGES
Merkel Omegat OMS-S is designed especially for larger diameters and heavy duty hydraulic applications.
- Very high resistance to pressure
- Very good extrusion resistance
- Design prevents twisting
- High contact pressure due to elastomer profile ring
- High resistance to abrasion
- Low friction, free of stick-slip
PRODUCT DESCRIPTION
Two-piece Merkel seal set comprising an elastomer U-ring with an elastomer sealing edge, fabric reinforcement on the contact area and an active back-up ring.
PRODUCT ADVANTAGES
Single-acting rod seal for use in hydraulics and pneumatics.
- Low friction due to fabric reinforcement
- Large range of dimensions
- Protection against extrusion through activated back-up ring
- Low deformation value (not suitable for sealing systems)
- Easily installed in non-axial housings
- From 100 mm diameter
PRODUCT DESCRIPTION
Two-piece Merkel seal set comprising an elastomer U-ring with an elastomer sealing edge, fabric reinforcement on the contact area and an active back-up ring. Merkel U-Ring Seal Set 0216 can also be used for pneumatic applications
PRODUCT ADVANTAGES
- Low friction due to fabric part
- Large range of dimensions
- Protection against extrusion through activated back-up ring
- Low deformation value (not suitable for sealing systems)
- Easily installed in non-axial housings
- From 100 mm diameter
PRODUCT DESCRIPTION
Two-component Merkel seal set for sealing piston rods, consisting of one PTFE profile ring with integrated pressure-relief function and skid with an elastomer profile ring as pre-load component. Patented product design (patent no.: DE 10117662 CI).
PRODUCT ADVANTAGES
- Replaceable for operating environments of the Merkel Omegat OMS-S series
- Increased reliability of sealing systems under demanding operating parameters (no continuous pressure build-up in gap area)
- Extended service life of sealing systems by long-term stability (reduced loading of the sealing system by minimised friction and wear)
PRODUCT DESCRIPTION
Two-piece Merkel seal set for use as a primary rod seal. The Merkel Syprim SM seal set is always used in a sealing system in combination with U-ring (e.g. Merkel U-Ring T 20).
PRODUCT ADVANTAGES
The Merkel U-Ring Syprim SM is designed especially for use as a system seal.
- Short primary seal
- No pressure enclosed between primary and secondary seal
- Low friction
- Highly wear-resistant
- Protection against extrusion through activated back-up ring
PRODUCT DESCRIPTION
Two-piece Merkel seal set with shortened inner lip and active back-up ring with press fit at the outside diameter.
PRODUCT ADVANTAGES
The Merkel U-Ring T 23 is mainly used with high pressures and is designed for housings according to ISO 5597.
- Bridges large gaps even with high pressures
- Wide operating temperature range
- Very good static and dynamic tightness
- High resistance to wear
PRODUCT DESCRIPTION
Merkel U-ring with asymmetrical profile, inner lip set back, additional support edge and sealing edge and press fit at the outside diameter.
PRODUCT ADVANTAGES
Single-acting rod seal especially for telescopic cylinders and radially restricted housings.
- Very good static and dynamic tightness
- Additional sealing edge prevents ingress of dirt to a large degree
- (Note: low dynamic deformation value, therefore not suitable for sealing systems)
PRODUCT DESCRIPTION
Lip seal, spring-loaded in some cases. Clamping flange for fixing in the housing.
PRODUCT ADVANTAGES
Single-acting rod seal for less important applications and spare parts requirements. We recommend more modern series for new designs.
PRODUCT DESCRIPTION
Lip seal. Clamping flange for fixing in the housing.
PRODUCT ADVANTAGES
Single-acting rod seal for less important applications and spare parts requirements. We recommend more modern series for new designs.
PRODUCT DESCRIPTION
Two-piece Merkel compact seal consisting of profile ring and O-ring as a pre-load component.
PRODUCT ADVANTAGES
Rod seal for lower pressure range with properties of
- Low friction
- Low housing height
PRODUCT DESCRIPTION
Merkel U-ring with asymmetrical profile, inner lip set back and press fit at the outside diameter.
PRODUCT ADVANTAGES
Single-acting rod seal for hydraulic cylinders. With new production technology even special sizes can be manufactured quickly and flexibly.
- Good media resistance
- Wide operating temperature range
- Very good static and dynamic tightness
- Use as an individual seal or as a secondary seal in sealing systems possible
- Large range of dimensions
- No moulding tools
PRODUCT DESCRIPTION
The Merkel U-Ring TM 23 is specially designed for sealing the piston rods of plungers, pushers and subsidiary cylinders in self advancing support systems.
PRODUCT ADVANTAGES
To meet the requirements of a higher radial deflection and larger gap bridging, the Merkel U-Ring TM 23 has been fitted with an increased pre-load and active back-up ring. The second sealing edge provides extra protection against the ingress of dirt particles.
- Good media resistance
- Very good static and dynamic tightness
- Large range of dimensions
- Bridges large gaps
- Highly wear-resistant
PRODUCT DESCRIPTION
Single-acting rod seal made of abrasion-resistant polyurethane
PRODUCT ADVANTAGES
Rod seal for heavy-duty pneumatic stresses and strains and high operating requirements. New production technology allows special sizes to be manufactured quickly and flexibly. The Merkel U-rings are designed for pressure on one side.
- High tightness
- Suitable for dry air
- Large range of dimensions
- No mould tools required
PRODUCT DESCRIPTION
Merkel V-packings are used for sealing piston rods, plungers and in exceptional cases of pistons. With their robust design they are very suitable for use in highly demanding, heavy and horizontal compressors, particularly if the plungers are subject to large side forces. V-packings can even be used if piston rods or plungers cannot be correctly used because of wear. V-packing in connection with fabric pressure and back-up rings are used primarily in heavy-duty hydraulics because they can easily be tightened at any time and their robust design. V-packing rings are supplied open for nominal diameter up to an inside diameter of 400 mm. For larger diameters the rings are over dimensioned in length, and they must be precisely fitted during fitting into the compression packing. If required endless rings can also be supplied. If no information on the version, the fluid or temperature is given, B/B (see Operating parameters range table) is delivered as the standard version.