Main causes of air leakage and damage of stainless steel pneumatic fittings
 Jun 15, 2022|View:406
stainless steel pneumatic fittings models, materials, specifications and scope of use

Types of stainless steel pneumatic fittings: Type A (male end with female thread), Type B (male end with male thread), Type C (female end with hose), Type D (female end with female thread), Type E (male end with hose), Type F (male end with male thread), Type DC (female end with plug), Type DP (male end with plug), Male end Type F with flange, Female end Type C with flange, KJA, KJB. C type with flange, KJA, KJB.


stainless steel pneumatic fittings Female Elbow


Material: 304 / 316 stainless steel

Size:1/2 inch inch ~ 6 inch inch inch : DN15~DN150

Normal pressure: 6.4mpa

Applicable temperature: -20℃ ~ 232℃

Applicable medium: gas, water, oil, and some corrosive liquids

Connection method: female thread, male thread, tube, welding, hose, with flange, etc.

Seal material: Buna-N, polyurethane, fluorine rubber, PTFE, ethylene propylene rubber.

Thread type: NPT, ZG, G, BSPT, BSP, DIN259/2999.

Quick coupling description: Quick coupling is a kind of pipe coupling that can be disassembled and assembled quickly without tools.

Quick coupling range of use: This kind of pipe fittings use light and convenient, clean, widely used in hydraulic, pneumatic and lubricating fluid delivery and other piping systems, especially in the urgent need for frequent disassembly and installation of piping.


stainless steel pneumatic fittings Male Branch Tee G thread


The main causes of air leakage from stainless steel pneumatic fittings

The anatomy of the quick coupling reveals. The main reason for air leakage from quick couplings is the deformation and damage of the seal. The material of the seal is ordinary rubber, shaped like a rectangular gasket.

1, a common seal, whether off gas or deflated. The two sides of the seal ring are under pressure, the rubber ring deformation is serious, easy to damage; off gas, the spool circular surface in the spring force and high pressure gas together, the rubber soft joint and bowl-shaped seal ring linear contact. The sealing pressure increases, so it is not easy to leak, while the bowl-shaped sealing network is backed by a seat with positioning flange, which is not easy to shift and deformation is small. When ventilated, the male connector tops off the spool. The role of quick coupling is both convenient and quick to connect the gas source, but also safe and reliable. Whether it is the automobile manufacturing industry, home appliance manufacturing enterprises, or maintenance of individual households, a large number of compressed air as a power source, therefore, will be used to gas quick coupling. It can be said that as long as there is power will be used, and if the use of time is not long to leak air, will waste energy and increase production costs.

2, the male end of the rubber joint and the rubber ring end contact, sealing pressure is relatively small, coupled with the end surface is not flat, it is easy to leak air.

Two main reasons for the damage of quick coupling

1, The shell of quick coupling is too thin and will be damaged by wear and corrosion after a period of time.

2. The "O" ring in the female body of the quick coupling is a heterosexual "O" ring, which is damaged.

Stainless steel pneumatic fittings precautions for use

1. stainless steel pneumatic fittings should not be used in places where metal powder or sand and dust are mixed to prevent poor work or leakage.

2. Do not exceed the maximum tightening torque when installing the threaded type to prevent breakage.

3. Do not use the hose with cracks to prevent causing leakage or dislodgement.

4. If used in machines with vibration and shock will cause a decrease in durability.

5. The fluid used must be clean fluid filtered by the filter.

6. Do not disassemble the stainless steel quick coupling.

7. Do not use for objects other than the fluid used.

9. Do not exceed the maximum operating pressure limit when using the stainless steel pneumatic fittings.

10. Do not use outside the temperature range of the mainless steel pneumatic fittings to prevent wear or leakage of the sealing material.

11. Do not artificially hit, bend, stretch, to prevent breakage.





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