Pneumatic quick coupler detailed explanation: types, working principles and purchasing guide.
The pneumatic quick coupler consists of two pneumatic accessories, commonly known as a female socket and a male plug. It adopts a mechanical locking structure to achieve quick plugging and unplugging, thereby completing the connection and disconnection of the pneumatic pipeline in an instant. When connected, it can ensure the sealing of the gas circuit and prevent gas leakage; when disconnected, it can safely cut off the airflow, and the entire connection and disconnection process does not require the use of tools, which is convenient and quick.
pneumatic quick coupler core values.
- Improve efficiency, complete pneumatic tool switching in 10 seconds
- Strong sealing performance, sealing leakage rate <0.1%, four-layer rubber sealing ring protection
- Ordinary two-handed operation/self-locking one-handed operation reduces the labor intensity of staff
- Strong compatibility, with internal thread style, external thread style, direct connection air pipe style, and each model can be connected and used
How do pneumatic quick couplers work?
Core components：
| part: | Functional Description: | Other notes |
| spring | Millions of compression lifespans, male plug pops out without lag | Carbon spring steel wire, high strength |
| Four-layer sealing ring | Strong sealing, no air leakage | NBR and FKM are optional |
| Carbon steel body | High strength, wear resistance, | Stainless steel or plastic steel optional |
| Precision thread | Clear without burrs, shockproof and leak-proof | CNC Precision Machining |
| Steel Ball | Slide into the male plug groove and lock | Carbon spring steel wire, high strength |
Workflow:
- Connection: Insert the male plug into the locking ring sleeve → the steel ball is inserted into the groove of the male plug → the valve core pushes the check valve → the air path is connected
- Disconnection: Press the locking ring → the steel ball is out of the groove → the one-way valve is reset and blocked → the air path is closed
Detailed explanation of pneumatic quick coupler of 5 materials
| Material： | illustrate： | shortcoming： |
| Industrial standard semi-self-locking | Iron (steel 08al) pickling, acid copper plating, nickel plating, chrome plating, affordable price | Requires two hands to operate, slightly increases the difficulty of changing pneumatic tools |
| Matt self-locking | Carbon steel (steel 08al) pickling, acid copper plating, pearl nickel plating, oil sealing, exquisite, one-handed operation, convenient and fast, moderate price | Easy to produce scratches, affecting the appearance |
| 304 stainless steel self-locking | All 304 stainless steel, high wear resistance, corrosion resistance and high temperature resistance, can be operated with one hand, convenient and fast | Relatively high cost |
| Plastic steel self-locking | Anti-corrosion, light weight, wear-resistant, beautiful | Over time, it tends to break |
| Copper Mini American | Suitable for small devices | For small equipment needs |
MYFEQD Pneumatic supplies a variety of materials. For more information, Please Contact Us.
How to select pneumatic quick coupler
- Matching caliber: Select according to the inner diameter of the connecting air pipe (commonly used air pipe inner diameters: 4mm.6mm.8mm.10mm.12mm.14mm.16mm)
- Choose according to the equipment thread size. The standard thread is PT (R, ZG) thread, PT1/2.PT3/8, PT1/2. The thread can also be customized as required.
- Formula: Minimum diameter ≥ tool air consumption (L/min) ÷ air velocity (15m/s)
- Pressure level: Maximum pressure resistance: 1.32Mpa (13.5kgf/cm²) Operating pressure range 0~0.9Mpa (0~10.2kgf/cm²)
- Material selection: Carbon steel material, the most cost-effective choice, suitable for most environments. Stainless steel material, for corrosion resistance, food industry, medical industry, chemical industry. Engineering plastics, suitable for light protection industry needs.
- Consider the sealing ring; NBR nitrile rubber for normal temperature (-20℃~80℃). Fluororubber FKM (-15℃~200℃) is selected for high temperature environment. EPDM is used for chemical gas, which is resistant to acid and alkali corrosion.
Industry application case analysis
1. In the car wash industry, there are many pneumatic tools (such as cleaning water guns, tire inflation tools, water blowing guns, air cannon tools, etc.), switching back and forth, dense air pipe wiring and other problems. Using the pneumatic quick connectors supplied by Maifeng Pneumatic, the replacement time is effectively reduced, and the place is clean and smooth.
2. In the workshop assembly line, pneumatic screwdrivers and pneumatic screwdrivers are used in multiple workstations. Pneumatic quick connectors and pneumatic air distributors are used, which effectively reduces the labor intensity of employees replacing pneumatic tools.
3. In automated production workshops, when air is supplied to some small automated equipment and the pressure is insufficient, pneumatic quick connectors with a quadruple seal design are used to perfectly solve the leakage problem. Quick connection and the mutual interoperability of multiple models improve the mobility of equipment displacement.
Common Troubleshooting Guide
1. There is air leakage after connection, the sealing ring is aging and needs to be replaced。
2. Difficult to plug and unplug, there is foreign matter in the steel ball slot, just clean it。
3. Insufficient airflow, the diameter is smaller than the tool requirement or there may be airflow leakage. Replace with a larger diameter pneumatic quick connector。
4. Accidental disengagement, failure of locking sleeve spring, severe wear and tear, need to be returned to the factory for replacement, scrapped and replaced with a new one.
Authoritative brand recommendation
1. SMC (Japan): No. 1 in high-end industrial market share
2.Festo (Germany): Leader in precision automation
3. Legris (France): Patent holder of quick plug-in technology
4. Eminocrown (UK): a world-renowned manufacturer and supplier of pneumatic and fluid control products.
China’s preferred MYFEQD: Wenzhou Maifeng Pneumatic Co., Ltd. implements the concept of big brand substitute for quality and has super high cost performance.
Pneumatic Quick Connector FAQ
1. Can pneumatic quick connectors be connected interchangeably with connectors of other brands or models?
It is not recommended to interchange pneumatic quick connectors of different brands or models. Connectors of different brands may differ in size, structure, and sealing method. Forcible interchange may lead to loose connections, air leakage, or damage to the connectors. Try to choose connectors of the same brand or compatible products for connection.
2. How to determine whether the connector needs to be replaced?
When connected, the female and male plugs shake in a large arc, and leaks occur after repeated plugging and unplugging. The sealing ring is hardened and has obvious cracks, and needs to be replaced as soon as possible.
3.What causes the pneumatic quick connector to be unstable or easy to fall off?
It may be caused by loose, worn or damaged joints. Check the tightness of the joints and re-tighten them if they are loose. If the joints are worn or damaged severely, replace the corresponding parts or the entire joint.
4.What media are pneumatic quick connectors suitable for?
Usually suitable for neutral gases such as air, compressed air, and nitrogen. Some joints can also be used for liquid media such as water and hydraulic oil, but attention should be paid to the compatibility of the joint material and the sealing ring. For media with corrosive or special properties, such as acids, alkalis, and organic solvents, it is necessary to select joint materials and sealing ring materials with corresponding corrosion resistance.
5.What should we pay attention to when using pneumatic quick connectors?
When using, be careful not to exceed the maximum operating pressure and temperature range of the joint to prevent damage or leakage of the sealing material; avoid using it in an environment containing a large amount of metal powder, sand and other impurities to avoid wear or blockage of the joint.
Although pneumatic quick connectors are a small component in pneumatic systems, they can also affect production efficiency and safety. Correct selection can reduce equipment failure rates by more than 30%.
