What is a Dowty seal?

The Dowty Bonded Seal is a synthetic rubber sealing. member that is bonded with heat and pressure to a. zinc plated steel washer. The flexing action of the lips. under pressure provides a positive and leakproof seal.

What is a Dowty washer used for?

A metal washer bonded to rubber, bonded washers (aka Dowty washers) are used to prevent leakage of media through fasteners of hydraulic fittings, pipe join flanges and valve bodies. A bonded washer consists of a flat metal ring with rubber bonded to the internal diameter that is wider than the metal washer.

What is a doughty washer?

A bonded seal is a type of washer used to provide a seal around a screw or bolt. Originally made by Dowty Group, they are also known as Dowty seals or Dowty washers. Now widely manufactured, they are available in a range of standard sizes and materials.

How do sealing washers work?

When installed in a sealing application, the materials in Sealing Washers compress against either a flexible or an inflexible surface to permanently seal in or seal out any operating environment, whether natural or industrial. Tight against surface, Seal flows inward to seal minor fastener diameter and surface voids.

What are bonded sealing washers?

Bonded Neoprene Washers (also known as sealing washers and cushioning washers) are a specialty washer designed to create an airtight seal between the bolt or screw and the hard surface.

What are sealing washers made of?

Sealing washers are circular seals with rectangular cross-section. They are normally made of annealed copper, annealed aluminium and fibre. They are used to ensure seals on hydraulic couplings where pressure is not high.

What is bonded sealing washers?

Bonded sealing washers create a seal that provides a greater degree of corrosion protection than conventional washers do. Sealing washers help seal joints, prevent leakage and provide cushioning under the head of the bolt or nut. Bonded washers are used in combination with a gasket.

What is the difference between a washer and a gasket?

Washers and gaskets are the same. Washers are used to distribute the load of a threaded fastener, whereas gaskets are used to prevent leaks around mating surfaces. Most washers won’t prevent fluids or gases from leaking; they will only distribute the load of the fastener with which they are used.

What is EPDM rubber gasket?

EPDM stands for Ethylene Propylene Diene Monomer, a synthetic rubber used in a range of applications. EPDM is used most commonly used in the automotive and construction industries for various seals due to its excellent resistance to environmental factors such as Ozone, UV and general weathering.

Is a gasket and a seal the same thing?

Generally speaking, gaskets serve as a static seal between flat surfaces, such as joints, while seals are used in more dynamic environments between active components such as rotating shafts, pumps, and engines.

Is a rubber washer a gasket?

Flat washers made of rubber, acrylic, or other sensitive products may possibly be mistaken with gaskets made of a broad variety of pliable products. Specific gasket materials include rubber, cork, cloth, felt, silicone, fiberglass, or neoprene.

Is rubber better than silicone?

Silicone also has significantly better flame resistance than natural rubber. For high temperature applications, silicone is certainly the better choice….Silicone vs Natural Rubber.

Natural Rubber Silicone
Approx. tensile strength 25 MPa Approx. tensile strength 5 MPa
Excellent abrasion resistance Poor abrasion resistance

When did the Dowty Seals company become a company?

In 1945, Dowty Seals was founded; during 1950, another new entity, Dowty Hydraulic Units, was created, while Dowty Fuel Systems followed in 1953. Various businesses were also acquired by the growing company, including New Mendip Engineering in 1948 and Coventry Precision in 1951.

Why are Dowty seals called Dowty alternative seals?

Dowty seals, history, properies and details of applications can be found here. Also links to dowty alternative seals. This seal is so-called because they were originally made by the Dowty Group . Founded in 1945 Dowty seals produced these bonded seals until 1992, when they were acquired by TI.

Why are Dowty seals the Rolls Royce of Bonded Seals?

The face to face sealing they allow eliminates special machining or groove cutting and reduced bolting torque. Dowty Seals are still widely regarded as the “Rolls Royce” of Bonded seals. High Pressures, constant thickness, highly specified rubber bonded to the metal washer.

When did Dowty Group stop being a company?

It was listed on the London Stock Exchange and was once a constituent of the FTSE 100 Index. The firm ceased operating as an individual entity following its acquisition by TI Group in 1992. The company has its origins as the Aircraft Components Company in 1931 and the work of British inventor and businessman George Dowty.