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Category Archives: Wipers

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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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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WIPER PO20

wipers_bwa

file_pdf STANDARD SEAL DIMENSIONS

DESCRIPTION

The PO20 sealing part combines an asymmetric lip seal profile with a wiper. Since it is installed in a single groove, the PO20 seal has several advantages:
– reduced overall dimensions;
– faster construction of the groove.

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.

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WIPER PO19

wipers_lwa

file_pdf STANDARD SEAL DIMENSIONS

DESCRIPTION

The PO19 type rod guide ring is used to avoid direct contact between cylinder head and rod, and between piston and sleeve, since for the main part of the pneumatic cylinders are made of aluminium. It’s also used to lead all the system. The guide rings are in moulded, non-abrasive, selflubricant material, especially studied to improve the linear sliding. The profile presents chamfers both sides for easier installation of rod and piston.

TECHNICAL DATA

Speed: < 1 m/s Temperature: from - 40° C up to + 115° C Static Strength: up to 36 N/mm2

MATERIAL

Non abrasive modified Polyacetalic resin with additives improving the sliding.
Advantages
– Excellent price/performance ratio
– Low stick-slip effect
− Good compressive strength

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WIPER PO18

wipers_wel

file_pdf STANDARD SEAL DIMENSIONS

DESCRIPTION

The PO18 wiper type is commonly used in simple effect cylinders open on one side. Because of its cleaning function, a reverse profile wiper is used to prevent bore wearing which may be caused by atmospheric agents, condensation and other environmental conditions.

TECHNICAL DATA

Pressure: no pressure, but a slight cavitation might occur.
Speed: < 1 m/s Temperature: from - 35° C to + 100° C, with peaks till + 110° C Fluids: water, dust or other atmospheric factors

MATERIAL

The proposed material is a “C0” type polyurethane, with high elasticity modulus, low compression-set and high abrasion resistance. The hardness is 93 Shore A ± 2.

ASSEMBLING

The assembling is done by overlapping in semi-open groove with a chamfer preventing the wiper extrusion during the cycle inversion. It is important to remove flashes or cutting edges to avoid damages.

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WIPER PO3

wipers_wed

file_pdf STANDARD SEAL DIMENSIONS

DESCRIPTION

The PO3 bidirectional scraper has a combined scraper profile where the seal is provided with a scraping lip on the outside and a sealing lip on the inside. The dimensions are interchangeable with normal scraper housings. The scraping lip is very flexible and it compensate misalignments of the rod. The sealing side has a stronger and longer lip to ensure the sealing performance and to help the oil film remaining on the rod to go back into the cylinder.

TECHNICAL DATA

Pressure: < 20 bar Speed: 1 m/s Temperature: from - 35° C to +100° C with peaks till +110° C Fluids: water at room temperature and mineral 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.
It is also possible to use harder polyurethanes for heavy polluted environments. In case please contact our technical department.

ASSEMBLING

The assembling is extremely easy because of the semi-open groove. Remove flashes an/or cutting edges in the housing.

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WIPER PO15

wipers_trd

file_pdf STANDARD SEAL DIMENSIONS

DESCRIPTION

The PO15 wipers are made of a PTFE element and an O-Ring having a sealing effect in the static part and, at the same time has an energizing effect on wiper in the absence of pressure. The TRD also has a scraping effect on the outside of the Cylinder and maintains a residual oil film on the internal part of the rod. Used with proper sealing, allows the hydrodynamic return in the cylinder.

TECHNICAL DATA

Speed: < 15 m/s Temperature: from - 30° C to + 100° C for the standard type with nitrile O-Ring. Short peaks till +120° C from -15°C to +150°C with FKM o-rings

MATERIAL

Bronze-filled PTFE for the standard type, and nitrile rubber NBR for the O-Ring.

ASSEMBLING

Easy assembling in semi-open groove. The O-Rings have to be fitted first into the groove and Then the PTFE element. Remove flashes and/or cutting edges in the groove.

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