Hydraulic and Pneumatic Equipment Supply | Hydraulic Seals & O-Rings - UK Supplier
At USC Universal Supplies Ltd we provide high quality Hydraulic Seals & O-Rings to clients across the UK at competitive prices.
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Seals and O’Rings

Hydraulic and Pneumatic Seals and O’Rings, Supplied & Custom Made, UK

seals and orings

At Universal Supplies (Clydesdale) Ltd, we are able to supply many types of seal kits, seals and O rings for manufacturers and custom made to suit our customers requirements. Non standard seals and specials can be manufactured quickly to deal with any urgent breakdowns.

SEALS

  • Bearing Rings
  • Braided Packing
  • DU Bushes
  • Insertion Tools
  • O-Rings
  • P.T.F.E. Components
  • P.T.F.E. Low Friction & High Temperature Seals
  • Quad Rings
  • Heli-Guard
  • Bonded Washers
  • Circlips
  • Hydraulic Seals
  • Metal Piston Rings
  • O-Ring Back-ups
  • P.T.F.E. Bearing Tape
  • Rotary Shaft Seals
  • V-Coil

We supply most of the manufactured range, including GACO (owned by Freudenberg), Pioneer Weston, Superfect, James Walker, Garlock, Chicago Rawhide (SKF), Merkel, Shamban, Beldam, and many other smaller, quality seal producers.

Seal Kits suitable for:

  • Bobcat
  • Commercial
  • Heil
  • Hitachi
  • JCB
  • Liebherr
  • Volvo
  • Caterpillar
  • Custom
  • Hiab
  • Hydroline
  • Komatsu
  • Parker
  • Many more….

Please see download documents for Leibherr and Parker seal kits

Liebherr seals.pdf

Parker Seals.pdf

Cylinder Repair Kits suitable for Atlas, Hydro-Line, Miller, Parker, Royal and Sheffer and more

Hydraulic and Pneumatic Seals

Hydraulic and pneumatic seals include piston & rod seals, U-cups, vee, cup, W, piston, and flange packings. Hydraulic seals are designed for high-pressure dynamic applications such as hydraulic cylinders. Pneumatic seals are used in pneumatic cylinders and valves and generally are designed for lower operating pressures than hydraulic seals. Pneumatic applications also typically demand higher operating speeds and lower friction seals than hydraulic applications. These seals may be used for rotary and reciprocating motion. Some hydraulic seals and pneumatic seals are composite. Composite seals are two- or multi-part seals manufactured as an integral unit. A typical composite seal consists of an integral PTFE ring and elastomer ring, providing the properties of an elastomeric ring with a rigid, low friction (PTFE) working face. These seals can have a variety of different cross sections. Some forms of composite seals are also referred to as polyseals, wedge-action, crown seals and tri-seals (3 part seals).

Important dimensions to consider when specifying hydraulic seals and pneumatic seals include shaft outer diameter or seal inner diameter, housing bore diameter or seal outer diameter, axial cross section or thickness, and radial cross section. Important service limits parameters to consider include maximum operating speed, maximum operating pressure, vacuum rating, and operating temperature. Rubber sealing element or lip material choices for hydraulic and pneumatic seals include ethylene acrylic, EDPM, fluoroelastomer, fluorosilicone, nitrile, nylon or polyamide, polychloroprene, polyetheretherkeytone, polyoxymethylene, polytetrafluoroethylene, polyurethane or urethane, and natural rubber. Metallic choices include sintered bronze, cast iron, and stainless steel. Other materials include felt and leather. Many seal manufacturers use their own proprietary material. Common features for hydraulic seals and pneumatic seals include spring loaded, integral wiper, and split seal.

Oil Seals/Rotary Shaft Seals

An oil seal can also called flexible lip, radial lip, or rotary shaft seal. Oil & grease seals are used to retain or separate lubricants or fluids. These seals are primarily used for rotary applications only. Common configurations include single lip, double lip, triple lip, and four or more lips. Other seal type choices include U-ring or block vee ring, V-ring, clearance or labyrinth seals, and bearing isolators.

Important dimensions to consider when specifying oil seals and grease seals include shaft outer diameter or seal inner diameter, housing bore diameter or seal outer diameter, axial cross section or thickness, and radial cross section. Important service limits parameters to consider include maximum operating speed, maximum operating pressure, vacuum rating, and operating temperature.

Mechanical Seals

mechanical seal 2

Mechanical seals are designed to prevent leakage between a rotating shaft and its housing under conditions of extreme pressure, shaft speed and temperature. Mechanical seals can be single acting or double acting. Single (acting) mechanical seals have one sealing gap. The lubrication film required by the sliding seal faces is provided by the medium to be sealed. The lubrication film required by the seal faces in double (acting) mechanical seals is provided by a higher pressure buffer medium (sealant liquid) that is compatible with the pumped product.

Important design parameters to consider for mechanical seals include spring configuration, shaft mounting, and seal configuration. Spring configuration can be single or multi. . Shaft mounting choices include cartridge unit, noncartridge, split seal (fully split), and semi-split seal. The seal can be tandem, face-to-face, back-to-back, or concentric.

Please click to open document showing some examples of seal profiles Seals for web.doc

We are able to offer direct replacements. For examples of some of the direct replacements offered please see attached file Direct Replacement Seals.pdf