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Category Archives: Piston Seals

PISTON SEAL KT15

file_pdf 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)

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PISTON SEAL PSZ

Tesnilo PSZ

file_pdf 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.

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PISTON SEAL DU3

piston_seals_du3

file_pdf 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.

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PISTON SEAL SPS/N

piston_seals_isto

file_pdf 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.

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PISTON SEAL SPS

piston_seals_ispo

file_pdf 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.

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PISTON SEAL MA23

piston_seals_mps-2

file_pdf 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.

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PISTON SEAL MA22

piston_seals_ma22

file_pdf 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.

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PISTON SEAL MA21-NBR

piston_seals_ma21_nbr

file_pdf 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.

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PISTON SEAL MA21

piston_seals_psp

file_pdf 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 the

MATERIAL

, 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.

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PISTON SEAL KT5

piston_seals_kt5

file_pdf 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 bar
Speed: < 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.

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