Engineered Wiper seals

Profile

Name

Operating range

Summary

The AB02A profile has an interference fit on the outside diameter which provides stability in the seal groove and helps to prevent possible movement and roll when the shaft reciprocates.

The plunged radius in the shoulder provides the precision machined scraping lip with increased flexibility over other standard wiper seals which makes the AB02A a perfect choice for applications that require reduced friction or where side-load or misalignment may occur.

Standard materials are PU and Hard grade PU for improved abrasion resistance, but other high-performance elastomers are available if the application requires.

The AB02B Wiper Seal is recommended for heavy duty applications where possible contaminants such as mud or ice may be present. The seal is designed with both pre-load and a sealing lip on the outside diameter. This external sealing lip helps prevent debris and moisture travelling behind the static diameter of the groove and entering the system. The AB02B is a good choice for applications where cylinders are working in a vertical position as moisture tends to gather in the wiper gland area in these circumstances.

AB02B is normally manufactured in hard grade PU materials for extra abrasion resistance and naturally has a heavy load to provide a positive scraping action which is normally required in heavy duty applications such as those mentioned above.

Our AB02C Wiper Seal is based on our standard AB02 profile but has been modified for external scraping of cylinder bores. This profile is commonly used in subsea applications where protection of the main piston seal from external contamination such as sand and silt may be required. This seal should not see direct pressure, in circumstances where this is unavoidable the profile needs to be pre-drilled with small pressure relieving holes – this obviously may allow small particles of debris to pass through into the system.

PU is generally the most suitable material for this profile, but it can be manufactured in a variety of others to suit your application

Press fit wiper (hydraulic) designed for open housings. It has a precision machined wiping lip to ensure a good wiping effect and exclusion of external system debris. Standard materials are PU wiping lip and POM outer case for ease of installation and good retention within the housing.

Only recommended for repair situations where a standard off-the-shelf metal-cased items are not suitable or where the application requires a choice of food contact quality materials.

The AB04 is a flexible Snap-fit (3 step) wiper seal that has been optimised for pneumatic applications.
The seal has tight fit in the groove across the outside diameter to help prevent rolling and a precision machined scraping lip which has a radiused contact point to allow the retention of initial lubrication film which provides lower breakout friction in fast moving pneumatic applications.

Standard materials are NBR, FPM and soft PU

The AB05 is a flexible Snap-fit wiper seal that has been optimised for pneumatic applications.
The seal has tight fit in the groove across the outside diameter to help prevent rolling and a precision machined scraping lip which has a radiused contact point to allow the retention of initial lubrication film which provides lower breakout friction in fast moving pneumatic applications.

Standard materials are NBR, FPM and soft PU.

The AB06 profile is a simple flexible Wiper Seal which should only be considered for light duty applications where gland space is at a minimum or where an economic seal is required.

Installation is easy and simple, the seal is deformed into a kidney shape and inserted into the groove, no re-sizing should be required.

Standard material is NBR but for increased abrasion resistance PU is available

The AB07 is a flexible snap-fit wiper seal with an angled shoulder to suit older design angled housings. Pre-load on the outside diameter ensures a stable fit in the seal housing and helps prevent dirt passing through the back of the groove onto the rod seal arrangement.

The AB07 has light contact on the scraping lip making it un-suitable for heavy duty applications where heavy contamination is present.

Standard materials are HPU, NBR and FPM Other materials on request.

The AB08 profile is a design commonly referred to as a Hat Wiper and is suitable for both closed and open housings (the use in open housings requires the use of a retaining ring).

The AB08 can be supplied with drilled locating holes on the flange upon request, confirmation of the hole sizes and P.C.D. will need to be provided in this instance.

A wide variety of material options are available including leather which is suitable for older machinery that may have substantial damage to the rod.

The AB11 is a flexible Snap-Fit Wiper Seal which is designed for use in medium to heavy duty applications. The AB11 provides back-up to the rod sealing system by providing an additional sealing lip in the pressure direction to prevent leakage of any fluid bypass from the rod seals.

The AB11 can be used independently as a rod seal and wiper in low pressure systems.

When using this seal, a pressure relieving bore is usually introduced between this part and the rod seal or a suitable back-pumping rod seal will need to be selected.

The AB11A is a flexible Snap-Fit Wiper Seal which is designed for use in medium to heavy duty applications. The 3-step design is secured into the housing to prevent bypass of external contaminants around the outside diameter of the groove. AB11A provides back-up to the rod sealing system by providing an additional sealing lip in the pressure direction to prevent leakage of any fluid bypass from the rod seals.

The AB11 can be used independently as a rod seal and wiper in low pressure systems.

When using this seal, a pressure relieving bore is usually introduced between this part and the rod seal or a suitable back-pumping rod seal will need to be selected.

The press-fit installation of our AB11B Wiper Seal prevents contamination occurring via the outside diameter of the seal groove and gives the customer the ability to design the gland with simple counter-bore machined groove. The precision machined scraping lip is designed to provide a heavy load against the rod and prevent the ingress of dust, mud, ice and moisture from entering the system. The AB11B is commonly used in harsh environments such as those found in mobile plant industry.

Standard wiper seal materials are PU and NBR with an outer retaining ring manufactured from a general engineering plastic such as POM, but this seal can be manufactured in a variety of materials if required.

When using this seal, a pressure relieving bore is usually introduced between this part and the rod seal or a suitable back-pumping rod seal will need to be selected.

AB12 is a premium flexible snap-fit Wiper Seal which is commonly referred to as ‘the mining wiper’ because it has been designed to work in heavy duty safety critical environments where system contamination is unacceptable.

The special snap in design provides pre-load over the outside diameter of the groove which ensures no rolling or movement while in operation and the extending flange protruding from the scraping lip covers the housing to help prevent debris and moisture from gathering or entering into the seal groove, this is especially useful for hydraulic cylinders operating vertically.

Hard PU grades are commonly used for their abrasion resistance and excellent scraping ability.

AB13 is commonly used in tandem with other wiper seals to provide extra protection from external contamination or can be used on its own where groove space is restricted.

The AB13 is normally produced in either hard grade engineering plastics such as Nylon or hard grade PU materials.

On occasions the AB13 may have to be split to enable installation into the groove. The selection of a hard grade PU material can sometimes avoid this.

The AB14 is an excellent heavy-duty clip-fit scraper seal and is recommended when the scraping of abrasive particles from the shaft is required. The groove design for the AB14 is simple which means machining of the metal carrier is quick and most of all economical.

Installation of the AB14 is done by simply pressing the heel down into the retaining groove, the outer seal lip then simply folds over before simply clicking back into position, retaining the wiper in place while also preventing the ingress of any contamination into the system through the outside diameter of the gland.

Standard material is lubricated Nylon, but other high-performance materials are available if required.

The AB14E is a modification of the standard AB14 profile and has been designed to scrape externally on cylinder bores. AB14E is an excellent heavy-duty clip-fit scraper and is recommended when scraping of abrasive particles is required. The groove design for this profile is simple which means machining of the metal carrier is quick and most of all economical.

Installation of the AB14E is done by simply pressing the heel down into the retaining groove, the inner seal lip then simply folds over before simply clicking back into position, retaining the wiper in place while also preventing the ingress of any contamination into the system through the outside diameter of the gland.

Standard material is lubricated Nylon, but other high-performance materials are available if required.

Profile AB25 is best known as a low-friction composite Wiper Seal and consists of a PTFE or Hard PU scraper element and an elastomeric O-Ring.

The O-Ring energises the low-friction scraper element to provide an effective barrier to help prevent ingress penetrating into the gland and contaminating the hydraulic system fluid.

By using material combinations of PTFE and an elastomer O-Ring this product can be made suitable for a wide range of applications that may see high temperatures and/or aggressive media.

Profile AB26 is a double acting composite Wiper Seal which consists of a main PTFE or Hard PU scraper element and two elastomer O-Rings.

The O-Rings energise the scraper element and provide an effective barrier to stop ingress penetrating into the housing. The AB26 provides two functions, a positive scarping action to prevent ingress of foreign particles into the system and a sealing action which prevents residual oil film from escaping into the environment when the piston rod is extended.

By using material combinations of PTFE and an elastomer O-Ring this product can be made suitable for a wide range of applications that may see high temperatures and/or aggressive media.

Profile AB27 is a double acting composite Wiper Seal which consists of a main PTFE or Hard PU scraper element and elastomer O-Ring. The O-Ring energises the scraper element and provides an effective barrier to stop ingress penetrating into the housing.

The AB27 provides two functions, a positive scraping action to prevent ingress of foreign particles into the system and a sealing action which prevents residual oil film from escaping into the environment when the piston rod is extended. The special design of the AB27 helps retain initial lubrication reducing breakout friction in high speed or friction critical applications.

By using material combinations of PTFE and an elastomer O-Ring this product can be made suitable for a wide range of applications that may see high temperatures and/or aggressive media.

The press-fit installation of our AB28 Wiper Seal prevents contamination occurring via the outside diameter of the seal groove and gives the customer the ability to design the gland with a simple counter-bore machined groove. The precision machined scraping lip is designed to provide a heavy load against the rod and prevent the ingress of dust, mud, ice and moisture from entering the system.

The AB28 is commonly used when seal grooves have become un-standard and an off-the-shelf solution in no longer useable.

Standard wiper materials are either PU or NBR with an outer retaining ring manufactured from a variety of engineering plastics

AB29 Profile is a further modification on the industry standard flexible snap-fit wiper seal.

The seal is produced with interference across the outside diameter providing the snap-fit to keep it stable in the groove while the piston rod is reciprocating. The extra sealing edge toward the outside diameter provides security against foreign particles making their way behind the seal while providing excellent moisture protection.

The seal is manufactured with a stabilizing heel that sits against the shaft and prevents seal movement and tilting when under side-load. This heel is also slotted to prevent pressure build-up in between the rod seal.

Standard material is PU although it can easily be manufactured in a high-performance elastomer if the application requires.

AB30 wiper seals are an older design offering dual contact wiping lips on both sides of the seal, making this type of excluder seal suitable for double rod cylinders where the shaft surfaces may be exposed to environmental debris in more than one area.

Standard material for the AB30 Wiper seal is polyurethane, but a high-performance elastomer can be utilized where aggressive fluids or high temperatures may be seen.

Profile AB31 is a double acting composite Wiper Seal which consists of a PTFE element and two elastomer O-Rings.

This seal design has increased leak tightness and scraping ability compared to other types of composite wiper seals and It is usually seen in heavy industries such as steel mills and normally where large diameters are required.

The AB31 provides two functions, a positive scraping action to prevent ingress of foreign particles into the system and a positive sealing action which prevents residual oil film from escaping into the environment when the piston rod is extended. When using this seal, a pressure relieving bore is usually introduced between this part and the rod seal.

By using a combination of a PTFE scraping element and an elastomer O-Ring this product can be made suitable for a wide range of applications that may see high temperatures and/or aggressive media.