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NBR EPDM Bonded Seal

Bonded seal called Dowty seal or a sealing washer, is a specialized type of sealing device used to create a reliable and leak-proof seal in high-pressure applications. It combines the properties of a metal washer and a rubber seal, providing an effective sealing solution for threaded connections.
They consists of a metal washer with a rubber sealing ring bonded to its inner diameter. The metal washer provides structural support and helps distribute the compressive load evenly, while the rubber seal ensures a tight and secure seal against the mating surfaces.
Also are commonly used in hydraulic systems, automotive applications, plumbing connections, and other high-pressure sealing applications. They offer a reliable, easy-to-install, and cost-effective sealing solution, making them a preferred choice in industries that require effective sealing under challenging conditions.

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Basic Info:

1.Raw-Material Brand: 

 DuPont (US) / Dow Corning (Germany) / Bayer (Germany) / 3M


Germany Standard Size/Inch/Metric Size 

3.Material Type: 

NBR / FKM / Silicone / EPDM+Metal/Stainless Steel

4.Product Type: 

Self-Centering/Non-Self Centering/Custom

5.Products Application

Metallurgical, chemical, engineering, construction, mining, petroleum machinery


Black, white, red, green, or any customize


Temperature from -60° C to +220° C in different material

8.Factory Certificate

IATF 16949:2016 and ISO9001, ISO14001 certificated

9.Product Certificate

KTW-W270/ Watermark/ LFGB / RoHs/REACH/FDA

Boman NBR EPDM Bonded Seals Advantages:

1. Solid Fixing: Bonded seals are intended to give a dependable and durable seal. They comprise of a metal washer with an elastic fixing component clung to it. The elastic component gives brilliant fixing properties, guaranteeing a tight seal between mating surfaces.

2. Protection from Spillage: Bonded seals are viable in forestalling spillage of liquids or gases. The elastic fixing component makes a tight seal that opposes pressure and forestalls releases, significantly under high-tension circumstances.

3. Easy Installation: Bonded seals are easy to install and require minimal preparation. They can be quickly and securely fitted into the sealing groove, reducing assembly time and improving productivity.

4. Wide Compatibility: Bonded seals are available in a variety of materials, including Nitrile (NBR), Viton (FKM), and EPDM, among others. This allows for compatibility with different fluids, chemicals, and temperature ranges, making them suitable for a wide range of applications.

5. Resistance to Fluids and Chemicals: Bonded seals exhibit excellent resistance to a variety of fluids, including oils, fuels, hydraulic fluids, water, and gases. They also offer resistance to a wide range of chemicals, ensuring reliable sealing performance in diverse environments.

Product Parameters:

NBR EPDM Bonded Seal

NBR EPDM Bonded Seal

NBR EPDM Bonded Seal

NBR EPDM Bonded Seal

NBR EPDM Bonded Seal

Rubber Bonded Seal Process Flow Chart: 

steps The process flow Process flow name Machinery and equipment/measuring equipment features Special features symbols note
product product
Rubber material visual / / /
IQC Hardness tester hardness /
Tensile machine Tensile strength / /
Tensile machine elongation / /
hydrometer The proportion of / /
Aging test chamber The compression permanent deformation / /
3 Mixing mixer / Material thicknessmm /
4             IQC rheometer TS2 / /
TS50 / /
TS90 / /
Hardness tester hardness /
5 Cutting edge
Cutting machine / Is long /
Material weight /

moulding 300 t hot molding machine, automatic monitoring
/ The molding pressure (kgcm2)
/ Molding time
/ Mold temperature
visual appearance / /
Hardness tester hardness /
The projector/caliper size /
7 IPQC visual appearance / /
Hardness tester hardness /
The projector/caliper size /
8 deflashing visual appearance / /
Automatic disassembly machine / speed /
/ time /
9 QC Scissors/knife appearance / /

steps The process flow Process flow name Machinery and equipment/measuring equipment features Special features symbols note
product process
10 FQC visual appearance / /
Hardness tester hardness /
The projector/caliper size /
11 cleaning Plastic basket / / / Manual cleaning
/ / /
/ / /
12 Post curing The oven / time
/ The temperature
13 Packing Electronic says Single - / /
Baling press The number of / /
The printer The labe / /
visual The cartons / /
14 OQC visual appearance / /
Hardness tester hardness /
The projector/caliper size /
visual check / /
visual weighing / /
15 Warehousing
transport cart Delivery note / /
Courier / /
Put in storage / /
note      1.“◇”Said inspection、“□”Said processing、“↓”Said handling、“△”Said storage、“▲”Said reworking/repairing
2.“★”Said product function and process of key special feature symbol;

NBR EPDM Bonded SealNBR EPDM Bonded Seal

NBR EPDM Bonded Seal Applications:

1. Hydraulic Systems: Bonded seals are extensively used in hydraulic systems, including pumps, valves, cylinders, and fittings. They provide a reliable seal between hydraulic components, ensuring leak-free operation and preventing fluid leakage under high-pressure conditions.

2. Automotive Industry: Bonded seals find application in the automotive industry, particularly in engine components, transmissions, fuel systems, and braking systems. They are used in connections involving high-pressure fluids, ensuring secure and leak-free sealing in critical automotive components.

3. Plumbing and Pipelines: Bonded seals are utilized in plumbing systems and pipelines to create a reliable seal in threaded connections. They are commonly used in water supply systems, oil and gas pipelines, and industrial plumbing applications.

4. Pneumatic Systems: Bonded seals are suitable for sealing threaded connections in pneumatic systems. They provide an effective seal in applications such as air compressors, pneumatic cylinders, valves, and fittings.

5. Oil and Gas Industry: Bonded seals find application in the oil and gas industry, particularly in equipment and systems involving high-pressure fluids. They are used in pipelines, valves, pumps, and other components, ensuring leak-free sealing in critical oil and gas operations.



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