LYHY Quick-Connect Pipe Fitting MGL3918

Product Overview

The quick-connect pipe fitting is a core component 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, ensuring convenient and efficient operation. The product features a brass body with nickel plating as the 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 its 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% leak-proof pressure testing. Its burst pressure is ≥4 times the working pressure, with a standard insertion/removal life of over 5,000 cycles. Operating temperatures range from –20°C to 80°C, making it suitable for most pneumatic circuits. 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 brass body with nickel plating, 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 effortless extraction without any tools—making the process simple and fast. This structural design not only ensures secure connections but also enhances ease of disassembly. Moreover, the dual-seal structure significantly reduces the risk of air leaks or hose disconnection caused by equipment vibration, meeting the demands of automated equipment operating continuously over long periods.

Performance Parameters

1. Rated Working Pressure: 0–1.0 MPa
2. Burst Pressure: ≥4 times the working pressure
3. Standard Insertion/Removal 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: Brass with nickel plating
7. Seal 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, bulkhead fittings, and more

Key Advantages

1. Dual-Seal Leak Prevention: Featuring a stainless steel retaining ring combined with an O-ring seal, this design minimizes the risk of air leaks or hose disconnection even under vibrating conditions, greatly enhancing air circuit stability.
2. Rigorous Factory Leak Testing: Each fitting undergoes 100% leak-proof pressure testing, ensuring strict control over potential defects 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 insertion/removal life exceeding 5,000 cycles, it reduces the frequency of replacements and lowers maintenance costs.
4. Corrosion-Resistant and Durable Materials: The brass body with nickel plating offers excellent resistance to oxidation and rust, while optional NBR/FKM seals accommodate diverse temperature and oil mist conditions.
5. Tool-Free, Efficient Installation: Designed for easy insertion and removal with a simple press-and-pull mechanism, installation time per connection is reduced from the traditional 60–90 seconds to just 8–15 seconds, boosting overall pipeline assembly efficiency by over 70% and saving labor hours while shortening equipment delivery times.
6. Comprehensive Compatibility: Available in straight, elbow, tee, reducer, and bulkhead types, supporting multiple international thread standards such as G, NPT, and M, meeting the needs of automation equipment, packaging machinery, textile devices, and most other pneumatic circuits. It also adapts well to equipment from Europe, Southeast Asia, and other regions, reducing selection mismatches.
7. Vibration Resistance for Continuous Operation: The robust locking structure accommodates the vibrations inherent in long-term continuous operation of automated equipment, ensuring stable airflow and minimizing downtime risks.
8. Convenient Debugging and Maintenance: The press-to-release design simplifies hose removal during production line debugging and equipment maintenance, effectively reducing losses due to downtime.

Core Value of the Product

1. Boosts 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 improve production efficiency.
2. Lowers Energy Consumption and Maintenance Costs: Excellent sealing performance reduces system air leaks, lowering energy consumption, while the long service life decreases the frequency of spare part replacements, easing maintenance workload and overall operating costs.
3. Enhances Equipment Operational Stability: The dual-seal and anti-vibration design ensures stable airflow 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% leak-proof testing and stringent material controls, it provides material and test documentation to meet compliance requirements for food processing, new energy projects, and more.

Target Customer Groups

Non-standard automation equipment manufacturers, packaging machinery producers, textile machinery makers, printing equipment companies, woodworking machinery suppliers, food processing equipment firms, lithium battery/photovoltaic equipment manufacturers, construction machinery component suppliers, pneumatic hardware distributors, production line renovation and old equipment upgrade service providers, pneumatic circuit modification 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 paired with various pneumatic components such as cylinders, solenoid valves, pneumatic grippers, and blow-off dust removal circuits, enabling rapid hose connection and disconnection—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 seal and body materials ensures stable air circuit operation.

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 reduces single-point installation time, boosts overall assembly efficiency, and saves labor hours.
2. Improves issues of frequent air leaks and poor air circuit stability found in ordinary fittings: The dual-seal structure combined with the stainless steel retaining ring effectively reduces system air leaks and lowers energy consumption, while the anti-vibration design accommodates continuous operation, ensuring stable airflow.
3. Solves problems of frequent spare part replacements and high maintenance costs: With a long service life of ≥5,000 cycles, it reduces the need for regular replacement of fittings, thereby cutting down on maintenance workload and overall operating expenses.
4. Avoids mismatched thread specifications and poor compatibility: Supporting multiple international thread standards such as G, NPT, and M, it adapts to equipment from Europe, Southeast Asia, and other regions, minimizing selection errors.
5. Meets diverse material adaptation needs across different operating conditions: Offering options like brass with nickel plating, stainless steel, and two types of seals—NBR and FKM—it handles complex environments involving 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 sealed version?
A: The NBR nitrile rubber sealed version operates within a temperature range of –20°C to +60°C, suitable for standard conditions; the FKM fluororubber sealed version covers a wider range of –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, material and test documentation are provided to meet compliance requirements for food processing, new energy projects, and similar applications.
Q4: How long is the insertion/removal life of the quick-connect pipe fitting?
A: The standard insertion/removal life exceeds 5,000 cycles, sufficient for long-term use and reducing the need for frequent replacements.
Q5: Which thread specifications does the product support?
A: The product supports multiple international thread standards, including G, R, NPT, and M, adapting to most pneumatic circuits and equipment from various countries.