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Dongguan Mingzhen Rubber & Plastic Products Co., Ltd.

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Dongguan Minz Rubber & Plastics Co., Ltd.

Add.: No.4, New Industrial Road, Shipai Tangwei, shipai town, Dongguan City
Tel: +86-0769-8665 2688
Fax: +86-796-8180 6477
Contact: Miss Li +86-136 6988 8704
Mailbox:lixiaoxia@dgminz.com.cn

Precautions for Installation of O-Ring (Rubber O-Ring)

Release time:

2019-05-24 12:30

Source:

O-ringPrecautions for Installation of Rubber O-ring
 
Requirements for 1. mounting O-rings (rubber O-rings)
 
Before installing the O-ring (rubber O-ring), check the following:
 
1. Whether the lead-in angle is processed according to the drawing and whether the sharp edge is chamfered or rounded;
 
2. Whether the surface of the inner diameter is free from burrs;
 
3. Whether the seals and parts have been coated with grease or lubricating fluid (to ensure the compatibility of the elastomer medium, it is recommend to use the sealed liquid to lubricate);
 
4. Do not use greases containing solid additives, such as molybdenum disulfide and zinc sulfide.
 
2. manual installation of O-ring (O-ring rubber seal):
 
1. Use tools without sharp edges;
 
2. Ensure that the O-ring (O-shaped rubber sealing ring) is not twisted, and the O-ring (O-shaped rubber sealing ring) shall not be stretched excessively;
3. Try to use auxiliary tools to install O-ring (O-ring rubber seal) and ensure correct positioning;
 
4. For the O-ring (O-shaped rubber sealing ring) bonded with the sealing strip, it shall not be stretched at the joint.
 
3. mounting screws, splines, etc.
 
1. When the O-ring (O-shaped rubber sealing ring) is stretched, a mounting mandrel must be used when screws, splines, keyways, etc. The mandrel can be made of a relatively soft, smooth metal or plastic and must not have burrs or sharp edges.
 
2. When installing the compression screws, the screws should be tightened symmetrically and not in the order of direction.
How to choose an economical and effective rubber seal-O-ring
 
O-ringIt is a rubber ring with a circular cross-section. Because its cross-section is O-shaped, it is called O-shaped sealing ring. It is one of the most widely used in hydraulic and pneumatic transmission systems. Usually in Taiwan enterprises, Japanese enterprises called ORing.
 
O-ring is a circular cross-section ring of rubber seals. Mainly used for mechanical parts to prevent leakage of liquid and gaseous media under static conditions. In some cases. The O-ring can also be used as a dynamic sealing element for axial reciprocating motion and low-speed rotary motion. According to different conditions, different materials can be selected to adapt to it.
 
O-ring seal is usually selected to try to choose a large cross-section of the O-ring. In the case of the same gap. The volume of the O-ring seal that is squeezed into the gap should be less than the maximum allowable value.
 
For different types of fixed or dynamic sealing applications, o-rings provide designers with an effective and economical sealing element. O-ring is a two-way acting sealing element. The initial compression in the radial or axial aspect upon installation gives the o-ring its own initial sealing capability.
 
The sealing force generated by the system pressure and the initial sealing force are combined into the total sealing force, which increases with the increase of the system pressure. O-ring in the static sealing occasions, showing a prominent role. However, in dynamic applications, o-rings are often used, but they are limited by the speed and pressure at the seal.
 
Technical data pressure:
Speed:
The maximum reciprocating speed in static situations can reach 0.5 m/s
When there is no retaining ring, the maximum pressure can reach 20mpa and the maximum rotation speed can reach 2.0 m/s
When there is a retaining ring, the maximum pressure can reach 40mpa
Medium and temperature:
When there is a special retaining ring, the maximum pressure can reach 200mpa, see the "Rubber Seal Material Characteristics Table"
dynamic pressure
Maximum compression:
When there is no retaining ring, the reciprocating movement can reach up to 5mpa. Static seal: 20% of the diameter of the o-ring
When there is a retaining ring, the higher pressure dynamic seal: 30% of the diameter of the o-ring
 

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The advantages of silicone sealing ring, the disadvantages of silicone sealing ring

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