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As a leading manufacturer based in Shanghai, China, Shanghai Zhibang Valve Manufacture Co., Ltd has been dedicated to producing high-quality fluid control components since 2016. Our 304 Stainless Steel Threaded Check Valve 1/4" NPT 3000 PSI is engineered specifically for small hydraulic piping systems, offering reliable backflow prevention in compact spaces. With an annual export value exceeding US$1 million and a strong presence in global markets such as North America, Europe, and Southeast Asia, we take pride in delivering precision-machined valves that meet rigorous industrial standards. This check valve combines corrosion resistance, high pressure capability, and easy installation, making it an ideal choice for hydraulic circuits, instrumentation panels, and pneumatic control systems.
Our threaded check valve is designed with a spring-loaded poppet mechanism that ensures quick and positive sealing when flow reverses. The 304 stainless steel body provides excellent resistance to rust and chemical attack, while the 1/4" NPT female threads allow direct connection to standard piping without adapters. Rated for 3000 PSI (20.7 MPa) working pressure, this valve handles demanding hydraulic applications where space is limited. Each unit is individually tested for leakage and cracking pressure to guarantee performance consistency.
| Parameter | Specification |
| Body Material | 304 Stainless Steel |
| Connection Type | 1/4" NPT Female Thread |
| Maximum Working Pressure | 3000 PSI (20.7 MPa) |
| Cracking Pressure | 0.5 ~ 1.0 PSI (typical, adjustable) |
| Operating Temperature | -20°C to 150°C (-4°F to 302°F) |
| Seal Material | PTFE (Teflon) or optional Viton/FKM |
| Spring Material | 304 Stainless Steel |
| Weight | Approx. 0.1 kg (0.22 lb) |
Key Features and Benefits:
- Compact Design: The 1/4" NPT size is perfect for small hydraulic piping, flow control panels, and tight installation spaces.
- High Pressure Capability: Rated at 3000 PSI, it withstands surges and continuous operation in hydraulic systems.
- Corrosion Resistance: 304 stainless steel body and internals resist oxidation, water, and many chemicals.
- Low Cracking Pressure: The spring-loaded poppet opens at minimal differential pressure, ensuring efficient flow.
- Threaded Connection: NPT threads provide a leak-free seal when properly installed with thread sealant.
- Durable Seal: PTFE seal offers low friction and excellent chemical compatibility; optional Viton for high-temperature or aggressive fluids.
- 100% Factory Tested: Each valve is pressure-tested and crack-tested before shipment.
- Versatile Application: Suitable for hydraulic oils, water, compressed air, and other non-corrosive media.
This check valve is ideal for applications such as hydraulic power units, lubrication systems, coolant lines, pneumatic tools, and test benches. Its compact size allows it to be installed in manifold blocks or directly inline with minimal space requirement. The 304 stainless steel construction ensures long service life even in humid or washdown environments. Additionally, the valve can be customized with alternative spring tensions or seal materials to meet specific customer requirements – please contact us for details.
Why Choose Shanghai Zhibang Valve?
Established in 2016, our factory has grown to serve customers across all major continents. With an annual export value between US$1 million and US$1.5 million, we have built a reputation for reliable product quality and on-time delivery. We are ISO9001 certified for our manufacturing processes, ensuring consistent quality control from raw material to finished product. Our main markets include North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and more. We ship from Shanghai, Guangzhou, Hong Kong, and Beijing ports, offering flexible logistics solutions. Every valve you order from us is backed by our commitment to engineering excellence and customer satisfaction.
Take advantage of our competitive pricing and professional support. Whether you need a sample for testing or a bulk order for OEM projects, we are ready to assist. Contact us today to discuss your specific requirements and experience the difference of working with a dedicated valve manufacturer.
Frequently Asked Questions (FAQ)
Q1: What is the cracking pressure of this check valve?
A: The standard cracking pressure is approximately 0.5 to 1.0 PSI. This can be adjusted by modifying the spring tension during manufacturing – please specify your requirement when ordering.
Q2: Can this valve be used for water or air service?
A: Yes, the 304 stainless steel construction and PTFE seal are compatible with water, compressed air, and many non-corrosive fluids. For aggressive chemicals, we recommend consulting our technical team for material compatibility.
Q3: What is the maximum operating temperature?
A: The standard valve is rated for -20°C to 150°C (-4°F to 302°F). If you need higher temperature resistance, we offer optional Viton seals that can handle up to 200°C (392°F).
Q4: Do I need thread sealant tape when installing this valve?
A: Yes, we recommend using PTFE tape or a suitable thread sealant on the male pipe threads to ensure a leak-free seal. The NPT threads are tapered and rely on the sealant to fill the spiral gap.
Q5: Is this valve suitable for food-grade applications?
A: The 304 stainless steel and PTFE seal are generally considered food-safe. However, for specific food or beverage applications, please contact us to confirm compliance with local regulations (e.g., FDA, 3A). We can provide custom options if needed.
Q6: What is the lead time for bulk orders?
A: For standard models, lead time is typically 7–15 working days depending on quantity. Customized valves may require 15–30 working days. Please contact our sales team for an accurate quote.
Q7: Can I get a sample before placing a large order?
A: Yes, samples are available for testing. We offer competitive sample pricing, and the sample cost can be deducted from your first bulk order. Please contact us to arrange.
Q8: How do you ensure the quality of each valve?
A: Our factory is ISO9001 certified, and we implement strict in-process and final inspections. Each valve undergoes a pressure test and a cracking pressure test. We also conduct random sample checks for dimensional accuracy and surface finish.
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