Diagram of working principle of inflatable sealing ring

The inflatable sealing ring, also known as the air bag, is hollow inside and has one or more inflation (deflation) nozzles
.

The material of the inflatable sealing ring depends on the use environment, for example: (1) Silicone rubber is used when high temperature is required; (2) EPDM rubber is used when aging resistance is required; (3) There is acid and alkali corrosion or oil In the case of pollution, use nitrile rubber
.

Specifications and models A common product type of inflatable seals, the general type of inflatable seals is divided by the specification name and cross-sectional shape of the inflatable seal
.

From the cross-sectional shape, there are O-type, D-type, M-type, W-type, I-type, U-type and other types of inflatable sealing rings
.

Inflatable seals are mainly used in one of the following situations: Gap sealing between large doors and hatches
.

This kind of hatch generally has a large perimeter, and is affected by processing and assembly accuracy or by changes in ambient temperature, resulting in thermal expansion and contraction deformation, resulting in inconsistent or changed gaps that need to be sealed.
The variation range is generally 3- 5mm or larger, it is difficult to achieve the ideal sealing effect with ordinary sealing strips
.

In this case, a sealing product that can change with the gap is needed, and the inflatable sealing ring is a new type of sealing technology successfully developed to meet this sealing requirement; pipeline ports and valves that are often opened and closed
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Mainly reflected in the dust pipelines in the power and chemical industries, which need to be opened frequently, dredged and then closed
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This kind of pipeline is generally more than ￠300mm, and the use of flange cover, ordinary gasket and bolt locking will increase a lot of maintenance man-hours and installation difficulty
.

If an inflatable sealing ring is used, all the above problems will be solved, and it can be locked with few or no bolts but only with a snap; automatic canning of powdered food in plastic bags
.

An inflatable sealing ring is installed at the canning port.
After the plastic bag is put on, the sealing ring expands to swell the plastic bag tightly.
After the canning is completed, the air is released and the plastic bag automatically falls off
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In this case, the canning efficiency is greatly improved;