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Hydraulic Rod Sealing Elements

  1. Hallite 16 Rod Seal
    27
    May

    Hallite 16 Rod Seal

    Design
    Used in tandem, the Hallite 16 rod seal provides the designer with a compact low friction seal for light to medium duty hydraulic cylinders.

    It has a special filled PTFE ring with a pre-loaded lip energised by an O ring. The lip is designed to have a contact area with the rod adequate to retain the media at low pressure. As high pressure acts on the O ring it compresses the lip against the rod increasing the contact area and the effectiveness of the seal. The special PTFE ring has the low frictional properties normally associated with this material but is strengthened by additives to reduce creep. It has a low breakout friction so stick-slip is eliminated. Standard seals are supplied with a nitrile O ring but other materials can be provided. For the best results it is recommended two seals are fitted. The PTFE ring should always be mounted with the sealing lip on the pressure side. Sizes above 30mm are easily installed by deforming the PTFE ring into a kidney shape, sizes under 30mm are best installed using a tool, details of which can be provided. A number of material options can be provided to extend operating conditions. Please ensure that the correct part number is specified for the material option as indicated. 

    NB: Part numbers suffixed by “‡” indicate housing sizes to meet ISO7425-2. 

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  2. Hallite 18 heavy duty Single Acting Seal
    26
    May

    Hallite 18 heavy duty Single Acting Seal

    A medium to heavy duty single acting seal, the Hallite 18 has shown itself over the years to be an effective and robust seal in a wide variety of applications.

    The seal comprises a rubberised fabric U form base to which is bonded a rubber energiser.

    The seal section is pre-loaded by the housing when installed to ensure effective sealing at low pressure. When the pressure increases the rubber energises the U form to increase the sealing area and hence the efficiency of the seal. The strength and durability of the rubberised fabric combines with its ability to retain lubricant keeping friction and wear to a minimum.

    In a piston application the Hallite 18 should not be used back to back to make a double acting assembly.

    NB:  Size lists give “on line” tolerances for rod applications.

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  3. Hallite 621 ROD SEAL
    26
    May

    Hallite 621 ROD SEAL

    The Hallite 621 is a top-of-the-range twin lip rod seal designed to provide a dry sealing solution in heavy-duty applications.

    The secondary sealing lip located behind the primary sealing lip improves stability of the seal in the gland. The unique profile of the NBR energiser ensures the precision trimmed primary sealing lips maintain contact under low or no pressure situations while ensuring proper sealing at higher pressures. This unique profile is also used in the Hallite 622 twin lip rod seal. The Hallite 621 also incorporates an acetal anti-extrusion ring to withstand side loads and extreme pressure peaks even with the extrusion gaps, which are the result of using remote plastic bearing strips like the Hallite 506 or 708.

    The Hallite 621’s seal shell is molded in Hythane® 181, Hallite’s high-performance polyurethane, for easy installation and excellent low temperature performance.

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  4. Hallite 610 ROD SEAL Twin Lip Polyurethane
    26
    May

    Hallite 610 ROD SEAL Twin Lip Polyurethane

    Hallite 610 ROD SEAL Twin Lip Polyurethane

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  5. Hallite 653 ROD BUFFER SEAL
    26
    May

    Hallite 653 ROD BUFFER SEAL

    The Hallite 653 single-acting rod buffer seal is designed to be used in conjunction with a high-performance rod seal, such as the Hallite 605 and 621, to protect the primary seal from shock pressure loading and high frequency pressure spikes in the hydraulic system. The design allows oil to pass through to the rod seal while holding back pressure spikes. The Hallite 653 is a patented product (European patent no. 0427554BI; U.S.A. patent no. 5088747) that also allows pressure to pass back into the system preventing a pressure trap between the rod seal and the buffer seal. The Hallite 653 is an excellent pressure buffer option in heavy-duty applications and offers extended sealing system life and performance.

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  6. Hallite 13 Vee Pack Rod Seal for heavy duty applications
    26
    May

    Hallite 13 Vee Pack Rod Seal for heavy duty applications

    The Hallite 13 is a Vee pack rod seal for heavy duty applications offering excellent performance and long life even under difficult operating conditions such as pressure surges, vibration and some misalignment. The seal assembly consists of a male and female adaptor and 5 vee rings.

    The male adaptor is usually manufactured form polyacetal but some of the larger sizes use rubberised fabric. It has grooves across one face to ensure equal pressure to the sealing edges of the vee ring.

    All sizes have vee rings manufactured from rubberised fabric because this has strength and durability and permits an oil film to lubricate the other parts of the seal. Some sizes are supplied with rubber vee rings between the rubberised fabric vee rings.

    The female adaptor uses a hard rubberised fabric to support the vee rings and protect them from extrusion damage. At high pressure the lips of the adaptor act as a secondary seal.

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  7. Hallite 11 Vee Pack Rod Seal
    26
    May

    Hallite 11 Vee Pack Rod Seal

    The Hallite 11 is a vee pack rod seal for medium duty applications offering excellent performance and long life even under difficult operating conditions such as pressure surges, vibration and some misalignment. The seal consists of a male and female adaptor and 5 vee rings. The male adaptor is usually manufactured from polyacetal but some of the larger sizes use rubberised fabric. It has grooves across one face to ensure equal pressure to the sealing edges of the vee ring.

    All sizes have three rings manufactured from rubberised fabric because this has strength and durability and permits an oil film to lubricate the other parts of the seal. Two rubber vee rings are supplied between the rubberised fabric vee rings (up to and including 140mm diameter) to aid low pressure sealing.

    The female adapter uses a hard rubberised fabric to support the vee rings and protect them from extrusion damage. At high pressure the lips of the adaptor acts as a secondary seal.

    The proportions of the range have been determined to give a satisfactory performance when used with the recommended operating conditions.

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  8. Hallite 616 ROD SEAL
    25
    May

    Hallite 616 ROD SEAL

    Hallite’s 616 is a compact, asymmetric twin lip rod seal offering excellent dry rod sealing for light and medium-duty applications where space and friction are at a premium. The seal is manufactured in Hythane® 181, Hallite’s high-performance polyurethane, for easy installation and excellent low temperature performance.

    The Hallite 616 design incorporates the sealing efficiency of the Hallite 605 rod seal with the compact grooves used by PTFE rod seals.

    Hallite recommends using our 616 rod seal as either a single seal or in combination with the Hallite R16 PTFE rod seal. The combination is recommended for use in applications where pressure peaks may occur, such as cylinders with cushioning.

    The Hallite R16 PTFE rod seal is fitted into the groove on the pressure side of the gland and the Hallite 616 is used as the secondary seal to ensure minimal leakage. Consult your local Hallite office when considering this arrangement.

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  9. 80 SWIVEL SEAL Double-Acting Polyurethane, Rod Sealing for Rotary Pressure Applications
    25
    May

    80 SWIVEL SEAL Double-Acting Polyurethane, Rod Sealing for Rotary Pressure Applications

    DESIGN
    The Hallite 80 double-acting swivel seal, or rotary pressure seal, is designed specifically for use in hydraulic swivel joints with an internal rotating rod, particularly in housings to Asian design. This design is a one-piece seal that can
    replace the two part seals typically used in this application. The Hallite 80 has a moulded groove in the dynamic face to improve sealing against the surface while trapping lubrication and reducing the surface contact area and thereby reducing running friction. Special pressure activation grooves are incorporated into design of the seal to enable an immediate seal of the joint. The Hallite 80 is manufactured in Hythane® 181, Hallite’s high-performance polyurethane, for easy installation, excellent low temperature performance, and long service life.

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  10. Hallite 506 BEARING
    11
    May

    Hallite 506 BEARING

    The Hallite 506 is available in three forms: cut bearing rings, spiral lengths, and flat coils. Spiral lengths and flat coils are recommended to customers who want to cut their own custom sizes. Spiral lengths are recommended to distributors or customers who may need to fit a wide range of application sizes in a particular cross section.

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