Hiri here (Dowty Seals)

Nga ahuatanga o nga hiri here

.ldeal Pressure Gasket

.Te hiri pono i te pehanga teitei me te iti Te kaha o te pāmahana teitei me te iti

.Whakaitihia te taipana raka me te kore e ngaro nga taumahatanga whakakoi i te mowhiti whakarewa hei aukati i te rapa rapa

.Metal mowhiti ārai kōpeketanga rapa 

Kei te waatea nga hiri here i roto i nga momo rauemi tae atu ki:

.Mea maitai . Nitrile -30 °C ki +100 °C

.Mea maitai . HNBR -20 °C ki +150 °C

.Stainless Steel .Viton -20 °C ki +200°C

.Parahi .EPDM - 50 °℃ ki te +150°C

.Aluminium .Silicone -60°C ki te +250°C

Ka taea e matou te tuku hiri here i roto i nga momo paerewa me te Whaiaro Whaiaro ki nga awhe e whai ake nei: Metric "Inch *BSP, German Metric *French Metric

Nga Taipitopito Hua

GM500/WX/US/USIT 1

GM500 Whaiaro Whaiaro /WZ /USS/USIT 1 SF

GM 1000

GM 2000

600

610

Kei a matou te Kounga Tirohanga Tirohanga Tirohanga Aunoatanga

E 4 nga waahanga rapunga kei te taha o te papahurihuri. Ka mau pikitia e te kōwae rapunga ka tukuna ki te punaha rorohiko mo te tātari me te whakawakanga. Ko nga hua kore e rite ana ka tohuhia, ka paopaohia e te matapihi koha, ka mutu ka ngawari te kohi hua. Ko te reiti haere ki te 99.5%.

What is the difference between bonded seal and dowty seal?

A bonded seal and a Dowty seal are two names often used interchangeably to describe the same type of sealing component, but there are subtle differences in terminology and usage depending on context and industry. Both are composite seals designed to provide reliable sealing under high-pressure conditions, particularly in hydraulic and pneumatic systems.

What Is a Bonded Seal?

A bonded seal is a type of washer that consists of a metal ring (usually steel or stainless steel) with a vulcanized rubber sealing element (typically nitrile rubber or FKM) bonded to its inner diameter. This combination creates a durable and reusable sealing washer capable of withstanding high pressures and temperatures. When compressed between two surfaces—such as a bolt head and a housing—the rubber element deforms to fill any gaps, creating a leak-proof seal.

What Is a Dowty Seal?

The term Dowty seal originally referred to a brand name for bonded seals developed by the British engineering company Dowty Group. Over time, “Dowty seal” has become a generic term in many industries, especially in the UK and Commonwealth countries, to describe bonded seals in general. In practice, a Dowty seal is a type of bonded seal, but not all bonded seals are Dowty seals in the strictest branding sense.

Key Differences

Applications

Both bonded and Dowty seals are widely used in:

Hydraulic fittings

Fuel systems

Oil drain plugs

High-pressure connections

Automotive and industrial machinery

While the bonded seal and Dowty seal perform the same function and have an identical structure, the difference lies mainly in naming and origin. “Dowty” is essentially a branded or colloquial term for a bonded seal, and in practical applications, they are functionally equivalent. Regardless of the name used, these seals are critical in preventing leaks in high-pressure systems and ensuring long-term mechanical integrity.

What does a bonded seal do?

A bonded seal is a highly reliable sealing device designed to provide a tight, leak-proof seal in high-pressure applications. It is composed of two main parts: a metal washer (typically made of stainless steel or carbon steel) and an elastomeric sealing ring (commonly made from materials like nitrile rubber, Viton, or silicone) that is bonded to the inner edge of the washer. The purpose of a bonded seal is to prevent fluid or gas from leaking around bolts, screws, and other fasteners in hydraulic, pneumatic, or mechanical systems.

How It Works

When a bonded seal is installed between two flat surfaces—usually where a bolt or threaded fitting is tightened—the metal washer provides structural support while the rubber insert compresses and deforms slightly. This creates a tight seal against both the mating surface and the fastener. The elasticity of the rubber compensates for minor imperfections on the sealing surfaces, ensuring a durable and leak-free connection.

Advantages of Bonded Seals

High Pressure Resistance: Bonded seals are ideal for high-pressure systems, often used in hydraulics and pneumatics.

Temperature and Chemical Resistance: Depending on the rubber material used (e.g., Viton for high temperature or chemical resistance), bonded seals can perform well under various environmental conditions.

Reusable in Some Cases: While the elastomer may degrade over time, the metal washer adds durability, and in less critical systems, the seals can sometimes be reused.

Easy to Install: Bonded seals can be quickly and easily installed without special tools, making them convenient for both OEM and maintenance applications.

Common Applications

Bonded seals are used across many industries, including:

Automotive: sealing engine bolts, oil drain plugs, and transmission parts.

Aerospace: ensuring leak-free connections in hydraulic and fuel systems.

Industrial Equipment: used in pumps, compressors, and machinery.

Hydraulic Systems: sealing between hydraulic fittings and threaded joints.

In summary, a bonded seal provides a secure and effective sealing solution for threaded components and fasteners exposed to fluids or gases. Its combination of metal strength and rubber flexibility allows it to perform reliably in demanding environments, making it an essential part of modern mechanical and hydraulic systems.