Category Archives: Rod Seals
ROD SEAL MA3
STANDARD SEAL DIMENSIONS
DESCRIPTION
For the MA3 rod seal slight changes have been made compared to the traditional rod seals profiles. This has been done in order to obtain the following advantages: better sliding, lower abrasion resistance and better performance also at low pressures. A rounded dynamic lip improve linear movements. Deeper U-profile between the dynamic and the static lip improve flexibility and better perform in case of misalignments of the system.
TEHNICAL DATA
Pressure: < 20 bar
Speed: < 1 m/s
Temperature: from – 30° C up to + 90° C
Fluids: air with or without lubrication, mineral oils or grease
MATERIAL
Standard polyurethane 90 Shore A.
Alternative polyurethane 85 Shore A.
ASSEMBLING
It is important to remove flashes or cutting edges in the housing to avoid damages. The rod doesn’t present flashes and must have a lead-in chamfer.
ROD SEAL MA6
STANDARD SEAL DIMENSIONS
DESCRIPTION
For the MA6 rod seal slight changes have been made compared to the traditional rod seals profiles. This has been done in order to obtain the following advantages: better sliding, lower abrasion resistance and better performance also at low pressures. A rounded dynamic lip improve linear movements. Deeper U-profile between the dynamic and the static lip improve flexibility and better perform in case of misalignments of the system.TECHNICAL DATA
Pressure: < 20 bar Speed: < 1 m/s Temperature: from - 30° C up to + 90° C Fluids: air with or without lubrication, mineral oils or greaseMATERIAL
Standard polyurethane 90 Shore A.Alternative polyurethane 85 Shore A.
ASSEMBLING
It is important to remove flashes or cutting edges in the housing to avoid damages. The rod doesn’t present flashes and must have a lead-in chamfer.
ROD SEAL KO15
STANDARD SEAL DIMENSIONS
DESCRIPTION
The KO15 seal type is similar to the KO10 type, but on the dynamic side, it presents a multifunctional double lip which:
– reduces stick-slip effects thanks because it keeps oil between the secondary lip and the main one;
– stops any external impurities;
– faces the material shrinkage at low temperatures;
– acts as a stabilizer.
TECHNICAL DATA
Pressure: < 400 bar at a temperature of 60° C
Speed: < 0.5 m/s
Temperature: from – 35° C to + 100° C with peaks till 110° C
Fluids: mineral fluids and oils
MATERIAL
The proposed material is polyurethane, with high elasticity modulus, low compression-set and high abrasion resistance. The hardness is 93 Shore A ± 2.
ASSEMBLING
To prevent any damage to the seal, remove any flash and cutting edges in the housing and on the rod. The seal should always be lubricated before assembling in order to have easier insertion of the rod.
ROD SEAL SRS/N
STANDARD SEAL DIMENSIONS
DESCRIPTION
The seal type SRS / N is a rod seal for pneumatic cylinders. The SRS/N can also be used for pneumatic valves where allowed by the overall dimensions. The reduced dimensions of the seat allows fast and simple machining operations. This symmetric profile allows easier installation The special spring shape ensure a system sliding even at very low pressure.
TECHNICAL DATA
Pressure: < 12 [bar]
Speed: < 1 [m/s]]
Temperature: -30 °C . +100 °C mescola NBR-15 °C . +150 °C mescola FKM
Fluids: Lubricated air, grease and mineral oils
MATERIAL
Standard material is NBR 80 Shore A.
On demand material FKM 75 Shore A
ASSEMBLING
It is important to remove flashes or cutting edges in the housing to avoid damages.
ROD SEAL SRS
STANDARD SEAL DIMENSIONS
DESCRIPTION
The SRS rod seal has been designed for pneumatic cylinder applications. The SRS can also be used for pneumatic valves where allowed by the overall dimensions. Moreover a shorter machining of the system can be obtained thanks to the reduced overall dimensions. The profile is rounded in the middle of the dynamic lip and it has two projections on the static lip. This symmetric shape allows easier installation. The special spring shaped profile ensures high flexibility in the system even at low pressure.
TECHNICAL DATA
Pressure: < 20 bar
Speed: < 1 m/s
Temperature: from – 30° C up to + 90° C
Fluids: air with or without lubrication, mineral oils or grease
MATERIAL
Standard polyurethane 90 Shore A.
Alternative polyurethane 85 Shore A.
ASSEMBLING
It is important to remove flashes or cutting edges in the housing to avoid damages.
ROD SEAL RBR
STANDARD SEAL DIMENSIONS
DESCRIPTION
The RBR ring, working as buffer ring, has been specially designed to work as main seal, to be used in combination with asymmetrical lip seals. Its function is to maintain working pressure for the second seal. It does not provide full sealing effect so an oil chamber will thus form between the two seals. Thanks to the special profile of the RBR ring, the growing pressure in the space will be released into the cylinder once a certain value is achieved. It works as a valve. It has been also designed to compensate pressure peaks.
TECHNICAL DATA
Pressure: < 400 bar at a temperature of 60° C
Speed: < 0.8 m/s
Temperature: from – 35° C to + 100° C with peaks till 110° C
Fluids: HL and HLP mineral oil
MATERIAL
The proposed material is polyurethane, with high elasticity modulus, fundamental for the sealing, low compression-set and high abrasion resistance. The hardness is 93 Shore A ± 2. For the anti-extrusion ring we propose a polyacetalic resin with high tensile strength.
ASSEMBLING
The assembling is done in closed groove. The polyurethane seal must therefore be fitted before the anti-extrusion ring.
ROD SEAL KO1
STANDARD SEAL DIMENSIONS
DESCRIPTION
The KO1 seal type has been developed to replace or work jointly with stepseals in PTFE, because of the same groove dimension. Internally it has a round groove where an O-ring, can be inserted and housed. The O-Ring acts as energizer for the static and dynamic sealing lips even without pressure. This profile has also excellent results at very low speed and pressure, because of the low friction. The machining of the groove is easier thanks to the reduced axial dimension.
TECHNICAL DATA
Pressure: < 250 bar at a temperature of 60° C Speed: < 0.5 m/s Temperature: from - 35° C to + 100° C, with peaks till 110° C Fluids: mineral oils (see TABLE I, pages 12-13)
MATERIAL
The proposed material is polyurethane, with high elasticity modulus, low compression-set and high abrasion resistance. The hardness is 93 Shore A ± 2, energized with
O-ring in NBR 70.
ASSEMBLING
As for all seal housings, remove any flash or cutting edges.
ROD SEAL DT4
STANDARD SEAL DIMENSIONS
DESCRIPTION
The DT4 rod seal is composed of two rings. The dynamic seal is a ring in filled PTFE while the static seal is an O-Ring also acting as energizer.
TECHNICAL DATA
Pressure: < 600 bar
Speed: < 15 m/s
Temperature: from – 30° C up to + 100° C for the standard type with nitrile OR. Short peaks till 120° C. For a different temperature range, the O-Ring should be replaced by a more suitable model.
MATERIAL
Bronze-filled PTFE for the standard type, and is NBR (Nitrile butadiene rubber) O-Ring
ASSEMBLING
PTFE seals require careful assembling operations in comparison to other types of seals It is necessary to remove flashes and/or cutting edges in the grooves.
The rod seal is usually assembled in the following sequence:
• fit the O-Ring into the groove
• twist the PTFE ring using a mandrel and a
expansion bush;
• calibrate with a plastic conical tool
ROD SEAL KO10
STANDARD SEAL DIMENSIONS
DESCRIPTION
The KO10 seal has small dimensions and has been developed for cylinders used in presence of pressure variation and high speed. The profile has been designed with a shallow groove to ensure tight contact between the static and dynamic part, even in zero pressure situations.
TECHNICAL DATA
Pressure: < 400 bar at a temperature of 60° C
Speed: < 0.5 m/s
Temperature: from – 35° C to + 100° C, with peaks till 110° C
Fluids: mineral oils and fluids
MATERIAL
The proposed
MATERIAL
is polyurethane, with high elasticity modulus, low compression-set and high abrasion resistance. The hardness is 93 Shore A ± 2.
ASSEMBLING
To prevent any damage to the seal, remove any flash and cutting edges in the housing and on the rod. The seal should always be lubricated before
ASSEMBLING
in order to have easier insertion of the rod.
ROD SEAL MA24
STANDARD SEAL DIMENSIONS
DESCRIPTION
The MA24 seal type is similar to the MA5 type with anti-extrusion ring. This seal is recommended when the coupling clearance between the head and the rod cannot be reduced and in the event of high pressure peaks.
TECHNICAL DATA
Pressure: 400 bar with peaks till 500 bar at 60°C
Speed : < 0.5 [m/s]
Temperature: – 35 °C . +100 °C with peaks till +110°C
Fluids : mineral hydraulic fluids
MATERIAL
The proposed
MATERIAL
is polyurethane, with high elasticity modulus, low compression-set and high abrasion resistance. The hardness is 93 Shore A ± 2.
ASSEMBLING
To prevent any damage to the seal, remove any flash and cutting edges in the housing and on the rod. The seal should always be lubricated before
ASSEMBLING
in order to have easier insertion of the rod.
