LYHY PCVC-G Check Valve

Product Overview

The check valve is a quick-connect piping component specially designed for pneumatic systems, primarily used to rapidly connect PU/PE/PA pneumatic hoses to valve bodies, cylinders, and air supply lines. It relies on a mechanical snap-fit mechanism to enable tool-free, quick insertion and removal of hoses, offering convenient and efficient operation. The main body is made of nickel-plated brass, with stainless steel retaining rings and NBR nitrile rubber seals inside. For certain special high-temperature and oil-resistant applications, an FKM fluororubber seal version is available. This product can meet the needs of most pneumatic circuits and is widely used in automation equipment, textile machinery, packaging equipment, construction machinery, and various other pneumatic application scenarios. It is not suitable for hydraulic oil circuits or environments containing highly corrosive media.

Core Structure and Technical Principle

This check valve employs a dual-seal structure consisting of a stainless steel retaining ring that clamps the outer wall of the hose and an O-ring. When inserting the hose, the stainless steel retaining ring automatically locks onto the hose’s outer surface, achieving rapid pipeline locking. Simultaneously, the O-ring tightly fits against the contact surfaces between the hose and the connector, creating a reliable seal that effectively prevents gas leakage. To remove the hose, simply press the unlocking mechanism at the connector end, allowing easy extraction without any tools—making the process simple and fast. The nickel-plated brass body offers excellent mechanical strength as well as outstanding oxidation and rust resistance, enabling it to withstand harsh conditions such as humidity and salt spray, thereby extending the product’s service life.

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: –20°C to 80°C (with NBR seals); –20°C to +120°C (with FKM fluororubber seals)
5. Compatible hoses: PU, PE, PA pneumatic hoses
6. Body material: Nickel-plated brass
7. Seal configuration: Stainless steel retaining ring, NBR nitrile rubber seal (optional FKM fluororubber seal)
8. Available types: Straight, elbow, tee, reducer, partition, etc.; thread options include G/R/NPT/M
9. Testing standard: 100% air-tightness pressure test on finished products

Key Advantages

1. Dual-seal leak-proof design: Featuring a stainless steel retaining ring combined with an O-ring seal, this valve resists gas leaks and hose disconnection even under equipment vibration, ensuring stable operation of the pneumatic system.
2. Rigorous factory testing: Each connector undergoes a 100% air-tightness pressure test, strictly controlling defective products to guarantee reliable quality upon shipment.
3. High safety and long lifespan: With a cycle life exceeding 5,000 insertions/removals and a burst pressure no less than four times the working pressure, it provides ample safety margin to meet long-term continuous operation requirements.
4. Versatile material compatibility: The nickel-plated brass body resists oxidation and rust, while offering two seal options—NBR or FKM—to suit both standard and specialized high-temperature/oil-resistant conditions.
5. Full range of specifications in stock: Covering multiple types and thread sizes, with ample inventory across the entire series; also supports non-standard modifications and OEM production, providing testing and material documentation to meet diverse customer needs.

Core Value of the Product

1. Enhanced assembly efficiency: With its tool-free installation design, single-point installation time has been reduced from the traditional 60–90 seconds to just 8–15 seconds, boosting overall pipeline assembly efficiency by over 70% and effectively lowering labor costs for manufacturers while shortening equipment delivery cycles.
2. Reduced maintenance costs: The long service life minimizes the frequency of spare parts replacement, easing maintenance workload; superior sealing performance reduces system leaks and lowers air consumption, while anti-vibration and anti-disconnection features make it ideal for automated equipment operating continuously, thus cutting downtime losses.
3. Global market adaptability: Supporting mainstream international thread standards such as G/NPT/PT, with thread tolerances controlled at 6H/6g, it seamlessly integrates with equipment from Europe, Southeast Asia, and other regions, reducing selection mismatches and helping customers expand into overseas markets.
4. Adaptability to diverse operating conditions: Offering different seal materials—NBR seals for standard conditions ranging from –20°C to +60°C, and FKM fluororubber seals for high-temperature/oil-resistant conditions spanning –20°C to +120°C—ensuring consistent seal performance across varying environments and safeguarding system stability.

Target Customer Groups

Assembly line equipment manufacturers, assembly machine producers, testing equipment companies, robotic arm manufacturers, transplanting equipment vendors, non-standard automation equipment makers, packaging machinery enterprises, textile machinery producers, printing equipment manufacturers, woodworking machinery firms, food processing equipment suppliers, lithium battery/photovoltaic equipment companies, construction machinery suppliers, pneumatic hardware distributors, production line renovation service providers, old equipment upgrade contractors, pneumatic circuit modification project contractors, overseas buyers, and more.

Application Scenarios

This product finds extensive use in non-standard automation, packaging machinery, textile and woodworking equipment, new energy tooling, assembly lines, and equipment renovation and maintenance projects. It can be paired with cylinders, solenoid valves, pneumatic grippers, blow-off dust removal circuits, and many other pneumatic components, enabling quick connection and disconnection of hoses—particularly suited for continuous operation and vibrating environments. In industries like food and new energy, where material and testing requirements are stringent, corresponding material certifications and test reports can be provided to meet regulatory compliance needs.

Solutions to Industry Pain Points

1. Addressing low efficiency in traditional pipeline connections: Conventional methods require tools, take longer to install, and incur higher labor costs. This check valve’s tool-free quick-connect design significantly shortens installation time, boosts assembly efficiency, and reduces labor expenses.
2. Solving gas leakage caused by human error: Traditional connections rely on manual operations, often resulting in inadequate sealing. This check valve’s design, which locks the hose upon insertion, greatly reduces the likelihood of human error, ensures consistent assembly quality, and minimizes system leaks.
3. Tackling hose disconnection under vibration: Some automated equipment operates continuously in vibrating conditions, making traditional connectors prone to disconnection and leakage. The stainless steel retaining ring lock mechanism of this check valve provides strong anti-vibration and anti-disconnection capabilities, adapting well to equipment subjected to sustained vibrations.
4. Reducing frequent spare parts replacements: Ordinary connectors have short lifespans and require frequent replacement, driving up maintenance costs. This check valve boasts a cycle life exceeding 5,000 insertions/removals, cutting down on later replacement frequency and lowering overall user costs.
5. Overcoming poor adaptability in overseas markets: Different countries and regions have varying equipment thread standards, making conventional connectors difficult to fit. This check valve supports multiple mainstream international thread types, seamlessly integrating with equipment from Europe, Southeast Asia, and other regions, minimizing selection mismatches.

Frequently Asked Questions (FAQ)

Q1: Can this check valve be used in hydraulic oil circuits?
A: No, this product is specifically designed for pneumatic systems and is not suitable for hydraulic oil circuits or highly corrosive environments.
Q2: How do I choose the right seal material?
A: For standard conditions, select an NBR nitrile rubber seal with an operating temperature range of –20°C to +60°C; for special high-temperature/oil-resistant applications, opt for an FKM fluororubber seal with a temperature range of –20°C to +120°C.
Q3: Does the product come with testing documentation?
A: Yes, each unit undergoes a 100% air-tightness pressure test before leaving the factory, and we can provide additional testing and material documentation to meet compliance requirements for food, new energy, and other sectors.
Q4: Do you support custom modifications?
A: Yes, we offer non-standard customization and OEM services, tailoring personalized solutions according to customer needs.
Q5: What thread specifications does this check valve support?
A: We support G/R/NPT/M thread types, compatible with mainstream international standards and adaptable to equipment needs across different countries and regions.