JB982-77 Combination Metal-bonded Sealing Washers Standard Advantages of classification and use of precautions

JB982-77 combination metal-bonded sealing Washers standard is a type of sealing structure often used in pipe and flange connections. It consists of two or three gaskets: a metal gasket, a soft washer, and a center gasket. This kind of sealing structure can ensure the perfect sealing effect at the connection of pipes and flanges, and it can prevent oil and gas leakage, which reduces unnecessary losses.

1. Combination metal-bonded sealing washers are made of rubber ring and metal ring overall bonding vulcanization, used to seal the thread and flange connection sealing ring, which includes a metal ring and a rubber gasket.

2. Metric JB982-77 combination metal-bonded sealing Washers basic information: metal ring rust-proof treatment, a rubber ring generally uses oil-resistant nitrile or fluorine rubber. The combination of metal-bonded sealing washers has two sizes: metric and imperial. There are standards JB982-77 that provide for a combination of metal gaskets plus rubber in the form of a combination. A combination of sealing washers for threaded pipe fittings and screw plug sealing, it is generally used together with the ferrule type pipe fittings used to plug the oil port, mainly used for hydraulic valve pipe fittings threaded connections at the end of the static sealing, applicable to the British, U.S. standard inch threads and French, German standard metric threads and so on. Combined sealing washers can be divided into A-type and B-type according to the structural form. They can be split into whole and half packages according to the rubber coating.

The Shanghai Shubo industry organizes the above about the metric combination of metal-bonded sealing washers, JB982-77 combination of washers, and imported rubber combination of washers.

3. Advantages of combination washers: Combination seals use a combination of metal washers and elastomer seals, which vulcanize the sealing lip to the edge of the metal part to seal bolted connections and mountings used in all industrial applications, such as piping connections and pipe fittings. The sealing lip is pressed against a flat surface when tightening the bolted connection. The metal washer ensures that the components are reliably connected and securely fastened. The thickness of the retaining ring limits the amount of compression of the elastomer seal, eliminating any exceeding of the limiting torque at the joint and, therefore, ensuring a reliable sealing system. The internal pressure increases the sealing force by applying force to the sealing lip.

4. Technical data:

Working pressure: ≤40 MPA

Temperature: -25 ℃ ~ +100 ℃

Medium: hydraulic oil

Material properties: Material: rubber, metal

JB982-77 combination washer specifications and dimensions:

Φ6 Φ8 Φ10 Φ12 14 16 Φ18 Φ20 Φ22 Φ24 Φ27 Φ30 Φ33 Φ36 Φ39 Φ42

Φ45 Φ48 Φ52 Φ60 13 Φ15 Φ17 Φ26

JB982-77 Classification of combination  metal-bonded sealing washers

Metric High-Pressure-Rated Metal-Bonded Sealing Washers

Able to withstand pressure greater than 7,000 psi, these one-piece bonded washers create the tightest seals. They are zinc-plated steel for corrosion resistance in wet environments. The Buna-N rubber seal has excellent abrasion resistance and good oil, weather, and chemical resistance. Washers are reusable.

Pressure-rated metal-bonded Sealing Washers for Nuts and Washers

Also known as thread-sealing washers, use these under nuts and other washers. Rated to withstand pressure at or greater than 2,000 psi, these one-piece metal-to-rubber bonded washers create a more robust seal than metal or rubber alone. They are zinc-plated steel for corrosion resistance in wet environments. The Buna-N rubber seal has excellent abrasion resistance and good oil, weather, and chemical resistance. Washers are reusable.

Sanitary Metal-Bonded Sealing Washers

Eliminate cavities under screw heads where contamination may occur.

Washers with an EPDM seal are FDA-compliant, 3-A certified, and meet NSF/ANSI standards for food processing. However, they don't handle high temperatures as well as washers with a Fluoroprene fluoroelastomer seal.

Washers with a Fluoroprene fluoroelastomer seal have excellent chemical resistance and can withstand high temperatures so that you can use them in steam sterilization. They are FDA-compliant but are not 3-A certified and don't meet NSF/ANSI standards.

Metal-Bonded Sealing Washers

Create a more robust seal than metal or rubber alone. These one-piece washers are metal for strength with a bonded rubber seal that creates a tight grip. Made of neoprene, the seal has good oil and abrasion resistance. Washers are reusable.

18-8 stainless steel washers have good chemical resistance and may be mildly magnetic.

Hot-dipped galvanized steel washers are corrosion-resistant in wet environments.

Aluminum washers are lightweight and corrosion-resistant in wet environments.

In the use of JB982-77 combination  metal-bonded sealing washers standard, we need to pay attention to the following points:

1. The materials of metal washers and soft washers need to be selected according to the use of the environment and the media to choose the appropriate material;

2. Uniform force needs to be applied during installation so as not to cause deformation or damage to the washers;

3. After the washer is used for some time, it is necessary to check the sealing effect and whether the gasket is damaged; if necessary, it must be replaced.

Overall, the JB982-77 combination metal-bonded sealing Washers standard is an efficient and reliable sealing structure standard.  

That can be widely used in various pipeline and flange connections to protect essential parts' industrial safety and productivity.

If you are looking for high-quality fastener screws & all kinds of washers or technical support for structural design, don't hesitate to get in touch with me. Thanks. Email: adelajonly@gmail.com Website: www.juxinfasteners.com