LYHY Quick-Connect Pipe Fitting MGL3929

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 structure to enable tool-free, quick insertion and removal of hoses, offering 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, providing a dual-seal structure that effectively ensures air-tightness and stability. The product has a rated working pressure of 0–1.0 MPa, undergoes 100% air-tightness pressure testing upon completion, and boasts a burst pressure ≥4 times its working pressure. Its standard insertion/removal life exceeds 5,000 cycles, with a working temperature range of –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 Principle

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. Working 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. 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 with an O-ring seal, this structure minimizes the risk of air leaks or hose disconnection even under vibrating conditions, greatly enhancing air circuit stability.
2. Rigorous factory air-tightness testing: Each fitting undergoes 100% air-tightness pressure testing, ensuring strict control over potential leaks from 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 oxidation and rust resistance, while optional NBR/FKM sealing materials accommodate diverse temperature and oil mist conditions.
5. Tool-free, efficient installation: Designed for easy insertion and removal with a single press, 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 cycles.
6. Comprehensive specifications and wide compatibility: Available in straight, elbow, tee, reducer, and partition types, supporting multiple international thread standards such as G/NPT/M, meeting the needs of most pneumatic circuits in automation, packaging, textile, and other industries, while also adapting to equipment from Europe, Southeast Asia, and beyond, minimizing selection mismatches.
7. Vibration-resistant adaptation for continuous operation: The robust locking structure accommodates the vibrations inherent in long-term continuous operation of automated equipment, ensuring stable airflow and reducing downtime risks.
8. Convenient debugging and maintenance: The one-touch removal design simplifies pipeline disassembly during production line debugging and equipment maintenance, effectively minimizing losses due to downtime.

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 decreases manpower requirements, helping manufacturers shorten equipment delivery cycles and boost production efficiency.
2. Lowers energy consumption and maintenance costs: Superior sealing performance reduces system air leaks, cutting down on air-source energy usage, while the long insertion/removal life decreases the frequency of spare part replacements, easing maintenance workload and overall operating expenses.
3. Improves equipment operational stability: The dual-seal and vibration-resistant design ensures reliable 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% air-tightness testing and stringent material controls, it provides material and testing 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 enterprises, lithium battery/photovoltaic equipment vendors, construction machinery suppliers, pneumatic hardware distributors, production line renovation and old equipment upgrade service providers, pneumatic circuit modification project 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 cylinders, solenoid valves, pneumatic grippers, blow-off dust removal circuits, and many other pneumatic components, enabling rapid hose connection and disassembly—especially suited for equipment operating continuously under vibration. In food processing, new energy, and other projects with strict material and quality requirements, corresponding material and testing documentation can be provided to meet compliance needs. Additionally, for outdoor equipment and workshops heavily exposed to oil contamination, selecting appropriate sealing and body materials ensures stable airflow under challenging conditions.

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 installation time per connection, boosts overall assembly efficiency, and saves labor hours.
2. Alleviates common issues of air leaks and poor air circuit stability: The dual-seal structure combined with the stainless steel retaining ring effectively minimizes system air leaks, cuts down on air-source energy consumption, and the vibration-resistant design adapts to continuous operation, ensuring stable airflow.
3. Solves frequent spare part replacement and high maintenance costs: With a long insertion/removal life of ≥5,000 cycles, it reduces the need for later fitting replacements, lowering maintenance workload and overall operating expenses.
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 beyond, minimizing selection errors.
5. Meets diverse material adaptation needs: Offering brass with nickel plating, stainless steel, and other body materials, along with NBR and FKM sealing options, it handles complex conditions like humidity, salt spray corrosion, high temperatures, and oil mist.

Common Questions FAQ

Q1: Can quick-connect pipe fittings be used in hydraulic circuits?
A: No, this product is exclusively designed 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 normal conditions; the FKM fluororubber 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 testing documentation?
A: Yes, the product provides material and testing documentation to meet compliance requirements for food, new energy, and other projects.
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 later replacements.
Q5: Which thread specifications does the product support?
A: The product supports multiple international thread standards such as G/R/NPT/M, accommodating most pneumatic circuits and equipment from different countries.