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Industries and scenarios where inflatable sealing rings are used

1. Food and pharmaceutical industry (sterilization cabinets, vacuum packaging machines, powder filling and sealing, sterile isolators, airtight doors for cleanrooms, etc.)
2. Vacuum/precision equipment industry (vacuum chambers, vacuum coating machines, vacuum welding chambers, negative pressure chambers, laboratory cleanroom doors, etc.)
3. Chemical industry/energy/metallurgy (pressure vessels, pipeline flanges, dust pipelines, high-temperature furnace doors, desulfurization and denitrification equipment, etc.)
4. Packaging/logistics/warehousing (refrigerated vehicles/cold storage doors, rear doors of trucks, containers, packaging machine airlocks, side seals of conveyor belts, etc.)
5. Aviation/Rail Transit/Special Equipment (aircraft cabin doors, train doors, explosion-proof doors, firefighting equipment, large hatch covers, etc.)
6. Other general industrial products (various large double-door, sliding door, flange port, and irregular-shaped cabinets; powder/particle/liquid conveying pipeline valves; noise isolation rooms, soundproof doors, water treatment equipment, etc.)

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Inflatable sealing ring type　 Custom-shaped custom-made items　 Oil sacs and air sacs type　
Fluorine rubber sealing ring
Fluorine rubber sealing ring
Fluorine rubber sealing ring: The fluorine rubber sealing ring is simply called the fluorine rubber sealing ring. It is currently the most advanced sealing product with extremely strong comprehensive performance in industrial sealing. It is made by high-temperature vulcanization of fluorine rubber material. The product has excellent high-temperature resistance, low-temperature resistance, acid and alkali resistance, oil resistance, solvent resistance, corrosion resistance, and its antioxidant and anti-aging ability far exceeds that of ordinary rubber materials. The fluorine rubber material can withstand a high temperature of up to 230℃, and can withstand a short-term maximum temperature of 300℃. It has good low-temperature toughness and is not prone to hardening or cracking. At the same time, it can resist the erosion of engine oil, hydraulic oil, chemical corrosive liquids, ozone and ultraviolet rays, and is not prone to deformation, swelling, aging or deterioration during long-term use. The sealing density is high, the rebound performance is excellent, the compression permanent deformation is small, it is wear-resistant and pressure-resistant, the sealing effect is stable, and the service life is more durable. Advantages: We have multiple molds that can meet most of the specifications and models in the market. Generally, there is no need for additional mold opening costs.
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Dust cover
Dust cover
Dust Cover: The dust cover is also known as an extensible protective sleeve or a corrugated dust cover. It is a rubber protective plastic accessory, mainly made of high-quality rubber raw materials through vulcanization. It comes in various styles such as corrugated folding type, integrated cylindrical type, and closed type. The overall flexibility of the product is excellent, with good expansion and rebound effects, and it is resistant to pulling without cracking. Its main functions are dust prevention, waterproofing, oil and dirt prevention, sand prevention, rust prevention and corrosion prevention. It can isolate external dust and debris, rainwater impurities, avoiding long-term exposure of mechanical components to wear, rust, aging and jamming. The dust cover has excellent resistance to high and low temperatures, aging and friction. It has a large expansion stroke, flexible compression and folding, easy installation, and excellent sealing performance. It can freely expand and swing with the mechanical movement without affecting the normal operation of the equipment. It is widely used in engineering machinery, automotive parts, hydraulic piston rods, connecting rods, transmission shafts, shock absorbers, mechanical equipment connection parts, precision instruments, etc. It effectively reduces part wear, lowers equipment maintenance frequency, and extends the overall service life of mechanical components.
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Shield machine suction cup sealing strip
Shield machine suction cup sealing strip
The suction cup sealing strip of the shield machine is a ring-shaped or I-shaped foamed rubber strip installed on the vacuum suction cup surface of the assembly machine. Its function is to closely adhere to the inner arc of the pipe segment, form a sealed cavity, evacuate air to create negative pressure, and firmly hold concrete pipe segments weighing several tons to tens of tons, completing the grasping, transportation and assembly processes.
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Oil sac, air sac
Oil sac, air sac
The pneumatic clutch (also known as air bag/air expansion clutch) is a dry friction clutch that uses compressed air as power and relies on the expansion of rubber air tires to push the friction blocks to tightly grip the driven drum to transmit large torque. It also has the function of an elastic coupling. Industrial rubber clutch airbags, brake airbags, and brake tires are highly resilient, resistant to impact, and fatigue-resistant, and are used in industrial clutches, brakes, and pneumatic braking systems of transmission equipment.
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Air clutch
Air clutch
The pneumatic clutch (also known as air bag/air expansion clutch) is a dry friction clutch that uses compressed air as power and relies on the expansion of rubber air tires to push the friction blocks to tightly grip the driven drum to transmit large torque. It also has the function of an elastic coupling. Industrial rubber clutch airbags, brake airbags, and brake tires are highly resilient, resistant to impact, and fatigue-resistant, and are used in industrial clutches, brakes, and pneumatic braking systems of transmission equipment.
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The Nen Qi Tia category
The Nen Qi Tia category
The pneumatic flange, also known as the pneumatic flange by-nut / inflated by-nut, is a large-diameter, low-pressure, quick-installation and quick-disassembly pipe sealing connection component. It achieves sealing and connection by using an inflated rubber air tire to grip the steel pipe. Its main features include large misalignment compensation and tool-free disassembly and assembly.
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Related news
The development trend of inflatable sealing rings

2026-09-18

The development trend of inflatable sealing rings
With the continuous upgrading and iteration in various fields such as new energy, pharmaceuticals, semiconductors, and nuclear power equipment, the industrial sealing components industry has ushered in a brand-new development pattern.
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Frequently Asked Questions
The pressure of the inflatable sealing ring

The normal inflation pressure for the standard type of sealing ring is 1-2 kilograms (0.1-0.2 MPa). Gradually increase the pressure for optimal sealing condition and use it to expand and seal the sealing ring. If you want to withstand greater pressure, through reasonable design and manufacturing, it can also withstand high pressure.

The characteristics of the inflatable sealing ring

1. The sealing gap is large and it has strong adaptability. Ordinary O-rings can only seal very small gaps. The inflatable ring can seal gaps of 0.5 to 5mm or even larger, with low requirements for processing accuracy. 2. It can be actively opened and closed, and is flexible to use. Inflation: Expansion and compression to achieve sealing/holding/blocking Deflation: Rapid contraction and reset, without friction or jamming It is particularly suitable for scenarios with frequent opening and closing and where the workpiece needs to pass through. 3. The sealing surface has good adaptability. It can self-adapt and fit for non-round, elliptical, slight deformation, rough surfaces, and flange misalignment. Ordinary hard seals are difficult to achieve this. 4. The pressure is controllable and the sealing force can be adjusted. The expansion force can be controlled by adjusting the air pressure. It can be used for both light and heavy loads, and it is not likely to damage soft workpieces (plastics, glass, thin-walled parts). 5. There is no friction or wear, and the lifespan is long. It only comes into contact during inflation, and it does not have friction in non-working states. It is much more durable than conventional sealing rings. 6. Installation is simple and the versatility is high. No complex and precise grooves are needed. Simple grooves or steps can be used for installation. It can also be made into square, rectangular, or special-shaped rings.

How to choose an inflatable sealing ring

1. First, let's look at the installation methods: 1. Outer diameter expansion pneumatic sealing ring: After inflation, it expands outward and presses against the outer cylindrical cavity, with the sealing surface on the outside. It is suitable for large gaps and large dimensional tolerances. 2. Inner diameter expansion pneumatic sealing ring: After inflation, it tightens inwardly. It has strong clamping force. 3. End face (axial) expansion pneumatic sealing ring: After inflation, it bulges and expands along the height direction, pressing against the opposite plane to form a seal. 2. Select the material based on the usage environment: 1. Silicone: Use imported silicone material. It is resistant to high and low temperatures, -60℃ to 300℃. 2. Ethylene Propylene Diene Monomer (EPDM): Resistant to acid and alkali corrosion, aging-resistant, ozone-resistant, and heat-resistant. Suitable temperature range: -60 to 130℃, but not resistant to oil-based media. 3. Nitrile Butadiene Rubber (NBR): Good oil resistance, high wear resistance, suitable for environments with oil contamination. Poor in low-temperature resistance and ozone resistance. 4. Fluorine rubber: Resistant to high temperatures, oil, acids and alkalis, corrosion-resistant, all-in-one material. 3. Select the size of the gap: 1. Small gap: Ordinary circular cross-section 2. Large gap, large tolerance: Select rectangular/irregular cross-section, or add a high expansion amount of the outer expansion sealing ring 3. Irregular surface, uneven surface: Select custom-shaped pneumatic sealing ring 4. Select the installation space: 1. Sufficient slot width and depth: Select standard O-type pneumatic sealing ring 2. Narrow space: Select flat, thin pneumatic sealing ring 3. Requires quick disassembly and assembly: Select open type, snap type

Frequently Asked Questions
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