LYHY Quick-Connect Pipe Fitting MGL3867

Product Overview

The quick-connect pipe fitting is a core pipeline connector in pneumatic systems, specifically designed for rapidly connecting PU/PE/PA pneumatic hoses to valve bodies, cylinders, and air supply lines. It utilizes a mechanical snap-lock mechanism to enable tool-free, quick insertion and removal of hoses, offering convenient and efficient operation. The product features a nickel-plated brass body as its main material, equipped internally with stainless steel retaining rings and NBR nitrile rubber sealing rings. For certain special applications requiring high temperature and oil resistance, an FKM fluororubber sealing version is available. With a dual-seal structure, it effectively ensures the airtightness and stability of the air circuit. The product has a rated working pressure of 0–1.0 MPa, and all finished products undergo 100% airtightness pressure testing. Its burst pressure is ≥4 times the working pressure, with a standard plug-and-pull life of over 5,000 cycles. Operating temperatures range from –20°C to 80°C, making it suitable for most pneumatic circuit requirements. It is widely used in pneumatic systems across various fields, including automation equipment, textile machinery, packaging equipment, and construction machinery.

Core Structure and Technical Principles

The core structure of the quick-connect pipe fitting consists of three parts: a nickel-plated brass body, a stainless steel retaining ring, and an O-ring seal. When a pneumatic hose is inserted into the fitting, the stainless steel retaining ring automatically clamps the outer wall of the hose, achieving rapid locking. Simultaneously, the internal O-ring tightly seals against both the hose and the inner wall of the fitting, forming a dual-seal structure that effectively prevents air leakage. To remove the hose, simply press the unlocking mechanism at the end of the fitting, allowing easy extraction without any tools—making the process simple and fast. This structural design ensures secure connections while enhancing ease of disassembly, and the dual-seal structure significantly reduces the risk of air leaks or hose disconnection caused by equipment vibration, meeting the demands of long-term continuous operation in automated systems.

Performance Parameters

1. Rated working pressure: 0–1.0 MPa
2. Burst pressure: ≥4 times the working pressure
3. Standard plug-and-pull life: ≥5,000 cycles
4. Operating temperature range: –20°C to 80°C (FKM fluororubber sealed versions can withstand –20°C to +120°C)
5. Compatible hoses: PU, PE, PA pneumatic hoses
6. Body material: Nickel-plated brass
7. Sealing materials: NBR nitrile rubber, FKM fluororubber
8. Thread specifications: G/R/NPT/M and other major international standards
9. Product types: straight, elbow, tee, reducer, partition, and more

Key Advantages

1. Dual-seal leak-proof design: Combining a stainless steel retaining ring lock with an O-ring seal, this structure minimizes the risk of air leaks or hose disconnection even under vibrating conditions, greatly improving air circuit stability.
2. Rigorous factory airtightness testing: Each fitting undergoes 100% airtightness pressure testing, ensuring strict control over potential leaks at the source and maintaining consistent product quality.
3. High safety margin and long service life: With a burst pressure ≥4 times the working pressure and a standard plug-and-pull life exceeding 5,000 cycles, it reduces the frequency of replacements and lowers maintenance costs.
4. Corrosion-resistant and durable materials: The nickel-plated brass body offers excellent oxidation and rust resistance, paired with optional NBR/FKM sealing materials to meet diverse temperature and oil mist requirements.
5. Tool-free, efficient installation: Designed for immediate locking upon insertion and easy removal by pressing, it eliminates the need for tools, reducing single-point installation time from the traditional 60–90 seconds to just 8–15 seconds. This boosts overall pipeline assembly efficiency by over 70%, saving labor hours and shortening equipment delivery cycles.
6. Comprehensive specifications and broad compatibility: Available in straight, elbow, tee, reducer, and partition styles, supporting multiple international thread standards such as G/NPT/M, meeting the needs of most pneumatic circuits in automation, packaging, and textile equipment. It also adapts to equipment from Europe, Southeast Asia, and other regions, minimizing selection mismatches.
7. Vibration-resistant for continuous operation: Its robust locking structure accommodates the vibrations inherent in long-term continuous operation of automated equipment, ensuring stable air circuit performance and reducing downtime risks.
8. Convenient debugging and maintenance: The push-to-release design makes pipeline disassembly during production line debugging or equipment maintenance much easier, effectively minimizing downtime losses.

Core Value of the Product

1. Enhances assembly efficiency and reduces labor costs: The tool-free quick-connect design significantly shortens pipeline assembly time and cuts labor input, helping manufacturers shorten equipment delivery cycles and boost production efficiency.
2. Lowers energy consumption and maintenance costs: Excellent sealing performance reduces system air leaks, cutting air supply energy usage, while the long plug-and-pull life decreases spare parts replacement frequency, easing maintenance workload and overall operating costs.
3. Improves equipment operational stability: The dual-seal and vibration-resistant design ensures stable air circuit performance even under continuous operation and vibration, minimizing equipment downtime caused by air circuit failures.
4. Adaptable to multiple scenarios and international markets: With multiple specifications and materials available, it suits various environmental conditions and complies with mainstream international thread standards, facilitating equipment exports and overseas market expansion.
5. Ensures compliance and quality: Through 100% airtightness testing and stringent material controls, it provides material and test documentation to meet regulatory requirements for food, new energy, and other projects.

Target Customer Groups

Non-standard automation equipment manufacturers, packaging machinery producers, textile machinery makers, printing equipment companies, woodworking machinery manufacturers, food processing equipment firms, lithium battery/photovoltaic equipment vendors, construction machinery suppliers, pneumatic hardware distributors, production line renovation and old equipment upgrade service providers, pneumatic circuit renovation contractors, and overseas buyers of pneumatic components.

Application Scenarios

Quick-connect pipe fittings are widely used in non-standard automation equipment, packaging machinery, textile and woodworking devices, new energy tooling, assembly lines, and equipment renovation and maintenance projects. They can be connected to various pneumatic components such as cylinders, solenoid valves, pneumatic grippers, and blow-off dust removal circuits, enabling rapid hose connection and disassembly—especially suited for equipment operating continuously under vibration. In projects like food processing and new energy, where material and quality requirements are stringent, corresponding material and test documentation can be provided to meet compliance needs. Additionally, in outdoor equipment or workshops with heavy oil contamination, selecting appropriate sealing and body materials ensures stable air circuit performance.

Solutions to Industry Pain Points

1. Addresses low assembly efficiency and high labor costs associated with traditional pipe fittings: The tool-free quick-connect design dramatically shortens single-point installation time, boosting overall assembly efficiency and saving labor hours.
2. Improves common issues of air leaks and poor air circuit stability: The dual-seal structure combined with the stainless steel retaining ring lock effectively reduces system air leaks and lowers air supply energy consumption, while the vibration-resistant design accommodates continuous operation, ensuring stable air circuits.
3. Solves frequent spare parts replacement and high maintenance costs: With a long plug-and-pull life of ≥5,000 cycles, it reduces the frequency of future fitting replacements, lowering maintenance workload and overall operating costs.
4. Avoids mismatched thread specifications and poor compatibility: Supporting multiple international thread standards such as G/NPT/M, it adapts to equipment from Europe, Southeast Asia, and other regions, minimizing selection errors.
5. Meets diverse material adaptation needs: Offering options like nickel-plated brass and stainless steel bodies, along with NBR and FKM sealing materials, it handles complex conditions such as humidity, salt spray corrosion, high temperatures, and oil mist.

Frequently Asked Questions (FAQ)

Q1: Can quick-connect pipe fittings be used in hydraulic circuits?
A: No, this product is designed exclusively for pneumatic systems and is not suitable for hydraulic circuits or highly corrosive media.
Q2: What’s the difference between the FKM fluororubber sealed version and the NBR nitrile rubber version?
A: The NBR nitrile rubber version operates within a temperature range of –20°C to +60°C, suitable for standard conditions; the FKM fluororubber version covers –20°C to +120°C, offering superior heat and oil resistance, ideal for specialized high-temperature and oil-resistant applications.
Q3: Does the product come with material and test documentation?
A: Yes, the product provides material and test documentation to meet compliance requirements for food, new energy, and other projects.
Q4: How long is the plug-and-pull life of these fittings?
A: The standard plug-and-pull life exceeds 5,000 cycles, sufficient for long-term use and reducing the need for future replacements.
Q5: Which thread specifications does the product support?
A: The product supports multiple international thread standards such as G/R/NPT/M, adapting to most pneumatic circuits and equipment from different countries.