Category Archives: Piston Seals
PISTON SEAL KT15
STANDARD DIMENSIONS
DESCRIPTION
The PHP piston seal is design for double effect cylinder where the pressure and working condition are heavy. It is composed by three element: – Static Part that has energizing function – Central Dynamic part has axial sealing function – Lateral antiextrusion Ring allow a greater radial clearance between piston and bore cylinder. Cylinders used on earth moving machines, lifting machines and presses.
TECHNICAL DATA
Pressure: < 400 [bar] (With TPU material)
Speed: < 0.8 [m/s] (With TPU material)
Temperature: from – 35 °C to +100°C (with peaks till 110°C with TPU material) da -35°C a + 150° (With PTFE material)
Fluids : mineral-based fluid and oil.
MATERIAL
– Static energizing ring in NBR 80 Shore A
– Dynamic seal in TPU 93 Shore A(standard for pressure until 300 [bar])
– Dynamic seal in TPU 98 Shore A (standard for pressure until 400 [bar])
– Dynamic seal in PTFE( for pressure until 600 [bar] e high speed)
– Anti-extrusion Ring in thermoplastic material (POM or PA)
PISTON SEAL PSZ
STANDARD DIMENSIONS
DESCRIPTION
The double effect Piston Seal PSZ is a combination of: a plastic runner with a step cut and a elastomeric ring (NBR) in rectangular section for energizing. The high strength of a plastic material, allow to resist at high pressure and also made radial clearance (Piston / Bore) more elevate respect at the others actually seals. This simplified and facilities the machining of the piston. The use we can find is in the excavators , in the lifts, in the cranes and in the fork lifts.
TECHNICAL DATA
Pressure: < 600 [bar] (with peaks till 1000 [bar])
Speed : < 1 [m/s]
Temperature: from -30 °C to +110 °C
Fluids : mineral-based fluid and oil.
MATERIAL
Elastomeric ring in NBR 75 Shore A
Plastic Runner in modify PA66 material
ASSEMBLING
The installation is simplified because the Runner has a cutting step. The assembling in in closed croove after the installation of NBR energizing element. Grease before the piston installation in the cylinder.
PISTON SEAL DU3
STANDARD SEAL DIMENSIONS
DESCRIPTION
The DU3 type mono-block piston type DU3 is made of NBR nitrile rubber hardness 75 Shore A vulcanized on a metal insert. It is normally used in pneumatic applications, in single and double effect cylinders. The profile with rounded edges improves the sliding and avoids Stick-Slip. The groove leads lubricant through the two sealing lips, ensuring the axial movements linearity for long time. The sliding direction spacers, self-align piston and sleeve in case of heavy radial loads. The piston presents, on both sides of the internal part, some grooves helping breakaway during the first reverse gear.
TECHNICAL DATA
Pressure: < 20 bar
Speed: < 1 m/s
Temperature: from – 30° C up to + 100° C
Fluids: air (lubricated or not), grase, etc.
MATERIAL
The material used is a combination of nitrile rubber NBR 75 Shore A and steel insert.For high temperature application we could also provide FKM compound instead of NBR compound.
ASSEMBLING
Remove sharp edges at the Bore-Cylinder entry to avoid seal damages. Grease the piston before installation.
PISTON SEAL SPS/N
STANDARD SEAL DIMENSIONS
DESCRIPTION
The seal type SPS / N is a rod seal for pneumatic cylinders. The SPS/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: from – 20 °C to +100 °C mescola NBR from -15 °C to +150 °C mescola FKM
Fluids: Lubricated air, grease and mineral oils
MATERIAL
Standard material is NBR 70 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.
PISTON SEAL SPS
STANDARD SEAL DIMENSIONS
DESCRIPTION
The SPS rod seal has been designed for pneumatic cylinder applications. The SPS 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.
PISTON SEAL MA23
STANDARD SEAL DIMENSIONS
DESCRIPTION
The MA23 seal has been specifically designed either for pneumatic compact short stroke cylinders and single/double effect cylinders. The guiding element is integrated on the seal. Specific notches keep the lubricant grease maintaining a sliding effect on the piston for long time. The magnet is located between the two opposed gaskets. For specific needs or problems, our technical office is at your complete disposal with tailor made solutions.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. The installation is made by overlapping the seal on the piston diameter. Warning: the piston must be correctly shaped according to the drawing of the MPS dimensions table.
PISTON SEAL MA22
STANDARD SEAL DIMENSIONS
DESCRIPTION
The MA22 seal has been specifically designed either for pneumatic compact short stroke cylinders and single/double effect cylinders. The guiding element is integrated on the seal. Specific notches keep the lubricant grease maintaining a sliding effect on the piston for long time. The magnet is located between the two opposed gaskets.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.The installation is made by overlapping the seal on the piston diameter. Warning: the piston must be correctly shaped according to the drawing of the MPS dimensions table.
PISTON SEAL MA21-NBR
STANDARD SEAL DIMENSIONS
DESCRIPTION
The MA21-NBR is a lip seal in NBR 70 Shore A used in single cylinder and double effect pistons. Created with a rounded dynamic lip which moves even at very low pressure. On the static and dynamic lip, there’re protrusions avoiding any possibility of reversion in the groove, even case of inversion without pressure. There are also notches on the base and on the side avoiding the possibility of seal ejection when, in consequence of micro-leakages, there’s pressure between the two seals.TECHNICAL DATA
Pressure: < 20 bar Speed: <= 1 m/s Temperature: from - 30° C up to + 100° C Fluids: lubricated air
MATERIAL
Standard material is a compound NBR 70 Shore A. For different applications HNBR, EPDM, FKM and VMQ compounds can be also supplied.ASSEMBLING
Eliminate sharp edges and protrusions on the piston to avoid, seal damages during the assembling. Grease the seal on the piston before fitting.
PISTON SEAL MA21
STANDARD SEAL DIMENSIONS
DESCRIPTION
The MA21 piston seal has been designed for single and double action pneumatic cylinders. The deep groove between the dynamic and the static lip, together with back-to-back lips radius, enhance seal sliding, even where there is a lack of environmental lubrication. The reduced dimensions, together with the high flexibility of theMATERIAL
, also facilitate installation in closed grooves.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. The rod doesn’t have flashes and must present a lead-in chamfer.
PISTON SEAL KT5
STANDARD SEAL DIMENSIONS
DESCRIPTION
The KT5 compact piston seal series type is designed with a central polyurethane element and two side anti-extrusion rings. The assembling between the polyurethane element with high elastic modulus and the two elastomer rings with high hardness enhances stability of the sealing even at heavy duty applications. Compared to rubber, the abrasion is also reduced due to the use of polyurethane, therefore extending the life of the seal. The friction (first operation and in working condition) is also considerably reduced, due to geometric shape of the seal, having better performance than NBR.TECHNICAL DATA
Pressure: from 0 to 400 barSpeed: < 0.8 m/s Temperature: from – 30° C to + 100 ° C with peaks up to + 110° C Fluids: mineral oils
MATERIAL
The materials used for the construction of this type of seal are:– polyurethane for the central element, hardness 93 Shore A
– the backup rings in TPE elastomer 63 Shore D.
ASSEMBLING
This seal can be assembled both in closed groove on a mono-block piston and in open groove on a twopart piston. Avoid machining scores on the piston which May damage the sealing during the installation The use of grease in the piston is recommended for easier assembling.
