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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 Seals0 comments

WIPER PO22

Wiper PO22

file_pdf STANDARD DIMENSIONS

DESCRIPTION

The function of the wiper PO22 wiper is cleaning the rod while return into position, blocking external impurities. It is made up of an external metal cage core part glued to a PU element. It has widely used on earth moving machinery and agricultural machinery. For the limited size can be used to protect joints, bearings and bushings rolling (pin dust seal). The groove is open and makes easier the design of the seat.

TECHNICAL DATA

Speed: < 0.8 m/s
Temperature: from -35°C to +100°C with peaks till +110°C.
Fluids: hydraulics oils, grease and mineral lubricants.

MATERIAL

The material of the wiper is a polyurethane with a hardness of
93° Shore A and steel core.
Compound reference : CA NORMS DIN 1624

ASSEMBLING

The assembling is done in open groove ( interference ). Remove flashes and cutting edges to allow better installation of the wiper to facilitate and not damage the cage during insertion.

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ROD SEAL MA3

rod_seals_ma3

file_pdf 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.

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Rod Seals0 comments

ROD SEAL MA6

piston_seals_ma6

file_pdf 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 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.

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ROD SEAL KO15

rod_seals_ko15

file_pdf 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.

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Rod Seals0 comments

WIPER PO21-NBR

wipers_bwh-n

file_pdf STANDARD SEAL DIMENSIONS

DESCRIPTION

The special geometry of the wiper PO21-NBR, without hanging, with vulcanized metal core inside, for completely open groove, improve the assembling. The grooved seat circlip holder, avoids the scraper ejection. The replacement is also very simple during maintenance. The special profile combining seal and wiper in a single solution, keeps the cylinder free from outside impurities.

TECHNICAL DATA

Pressure: < 16 [bar] Speed: < 1 [m/s]] Temperature: from – 30°C to +100°C for NBR version from -15°C to +150°C for FKM version
Fluids: lubricated air, grease and mineral oils

MATERIAL

Standard material is NBR 75 Shore A black colour. In alternative FKM 75 Shore A brown colour.

ASSEMBLING

We suggest assemblinh as follows:
1) Insert scraper
2) Place circlip in the niche
Is recommended to lubricate the seat and remove the sharp edges originated by the machining.

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WIPER PO21

wipers_bwh

file_pdf STANDARD SEAL DIMENSIONS

DESCRIPTION

The main characteristic of the hooked profile of the PO21 wiper is to enable easy and fast installation into a complete open housing, both automatically and manually. The groove is completely open with a lateral milling, which allows the wiper to be replaced easily. The special profile combining seal and wiper is very strong and allows important rod misalignments without any danger of ejection from the seat. Moreover, the static lips profile keeps the cylinder free from outside impurities.

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 93 Shore A.

ASSEMBLING

The wiper should be lubricated internally during installation. The external lubrication of the wiper and housing is not recommended due to the extrusion risk of the wiper. It is important to remove cutting edges and flashes in the housing to prevent damages of seal during assembling.

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WIPER PO5

wipers_bws

file_pdf STANDARD SEAL DIMENSIONS

DESCRIPTION

The PO5 wiper combines an asymmetric lip seal profile with a wiper. On the sealing lip the PO5 has a radius allowing greater smoothness and on the static side the reduced size step facilitates installation, especially for small diameters. The scraping part has a very thin lip so as not to influence the stick-slip effect in the cylinder movement.

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

Remove cutting edges and/or flashes from the housing where the wiper has to be installed in order to minimise seal wear during operation. Warning: for heavy duty applications showing misalignments or imbalance and with diameters bigger than o 16 mm, it’s recommend to hang the base of the wiper to the housing and not only to the step.
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WIPER PO20-NBR

wipers_bwa-n

file_pdf STANDARD SEAL DIMENSIONS

DESCRIPTION

The PO20-NBR rod seal with wiper is made of NBR 80 Shore A compound has been developed to operate where the machining tolerances of the seat aren’t in the correct range of roughness tolerance. The dynamic lip presents a radius allowing to slide at very low pressure. The seal has also a scraping lip stopping the outside impurities. The static lip includes some notches acting as seal stabilizers in case of quick inertial direction changes.

TECHNICAL DATA

Pressure: < 20 bar Speed: < 1,2 m/s Temperature: from - 30° C up to + 100° C Fluids: lubricated air

MATERIAL

Standard material is a compound NBR 80 Shore A. For different applications, HNBR, EPDM, FKM and VMQ compounds can be also supplied.

ASSEMBLING

Remove sharp edges and protrusions on the cylinder head to avoid damages of the seal during the assembling. Grease the seal on the piston before fitting.

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