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Help Center316 Stainless Steel Threaded Check Valve 1/2" NPT 1500 PSI for Small Hydraulic Systems
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Shanghai Zhibang Valve Manufacture Co., Ltd. (established in 2016) brings you a premium 316 Stainless Steel Threaded Check Valve engineered for reliability in small hydraulic systems. Rated at 1500 PSI with a compact 1/2" NPT female threaded connection, this valve delivers exceptional corrosion resistance and long-lasting performance. Our ISO9001-certified manufacturing process ensures consistent quality, making it an ideal choice for demanding fluid control applications where backflow prevention is critical.
This check valve is designed to automatically prevent reverse flow, protecting your pumps, actuators, and other system components. The 316 stainless steel body withstands harsh environments, including exposure to chemicals, saltwater, and high temperatures. Whether you are building a compact hydraulic power unit, a lubrication system, or a water treatment setup, this valve offers a space-saving solution without compromising on strength.
Key Features & Technical Specifications
- Material: 316 Stainless Steel – excellent corrosion resistance against acids, alkalis, and chlorides.
- Connection: 1/2" NPT female threads, compatible with standard piping systems.
- Pressure Rating: 1500 PSI (103 bar) – suitable for small hydraulic systems with moderate pressure demands.
- Temperature Range: -20°C to 200°C (customizable upon request).
- Operation: Spring-loaded design ensures low cracking pressure and rapid response.
- Sealing: NBR (Nitrile) or FKM (Viton) O-ring, depending on fluid compatibility – optional materials available.
- Compact Size: Overall length approximately 55 mm, weight ~0.15 kg, ideal for tight spaces.
- Flow Direction: Clearly marked arrow on the body for easy installation.
Product Specifications Table
| Specification | Value |
| Body Material | 316 Stainless Steel |
| Connection Size | 1/2" NPT Female |
| Maximum Working Pressure | 1500 PSI (103 bar) |
| Cracking Pressure | ~0.5 PSI (0.035 bar) |
| Operating Temperature | -20°C to 200°C |
| Seal Material | NBR (standard) / FKM (optional) |
| Applicable Media | Water, Oil, Gas, Hydraulic Fluids |
| Weight | Approx. 0.15 kg |
| Standard Compliance | ISO9001 Manufacturing |
Why Choose This Valve for Your Small Hydraulic System?
- Corrosion Protection: 316 stainless steel resists rust and pitting, even in marine or chemical environments, extending the valve's service life.
- Reliable Backflow Prevention: Spring-assisted poppet ensures tight shut-off, preventing system contamination and damage.
- Low Maintenance: Simple construction with few moving parts reduces the need for frequent servicing.
- Easy Installation: Standard 1/2" NPT threads allow direct connection to common hydraulic fittings and pipes.
- Compact & Lightweight: Saves space in confined panels or skids, perfect for mobile hydraulic systems.
- Versatile Media Compatibility: Suitable for hydraulic oils, water-glycol mixtures, compressed air, and many chemicals.
- Customizable Options: Available with different seal materials, spring forces, or end connections upon request.
Each valve undergoes rigorous pressure testing and leak checking before shipment. Our quality control team ensures that every unit meets the 1500 PSI rating and thread tightness standards. With over 8 years of manufacturing experience, Shanghai Zhibang Valve has supplied thousands of check valves to clients across North America, Europe, Southeast Asia, and beyond. Our annual export value of US$1 million – US$1.5 million reflects the trust placed in our products.
We ship from major ports including Shanghai, Guangzhou, Hong Kong, and Beijing, ensuring fast and reliable logistics. Whether you need a small batch for prototyping or a container for mass production, we offer flexible quantities and competitive pricing. Contact us today for a quote or technical drawing – our team is ready to support your hydraulic system requirements.
Frequently Asked Questions (FAQ)
-
What is the cracking pressure of this check valve?
The standard cracking pressure is approximately 0.5 PSI (0.035 bar). For special applications, we can adjust the spring to provide higher or lower cracking pressure upon request. -
Can this valve be used with aggressive chemicals?
Yes, the 316 stainless steel body handles many corrosive fluids. However, we recommend verifying the seal material compatibility. NBR is good for oils and water, while FKM (Viton) is better for aggressive chemicals and high temperatures. Please specify your media when ordering. -
What is the maximum temperature rating?
The standard temperature range is -20°C to 200°C. For higher temperatures (up to 300°C), we can supply with a graphite seal and special spring material – please contact our sales team. -
Is this valve suitable for gas applications?
Yes, it is suitable for non-corrosive gases such as compressed air, nitrogen, or natural gas, provided the pressure and temperature are within the rated limits. For high-pressure gas, we recommend adding a secondary check for safety. -
How do I install the check valve correctly?
Look for the flow direction arrow on the valve body. Install it so that the arrow points in the direction of the desired flow. Use thread sealant (e.g., PTFE tape) on the male threads to prevent leaks. Do not over-tighten, as 316 stainless steel can gall. -
What is the warranty period?
We offer a 12-month warranty against manufacturing defects from the date of shipment. Extended warranty options are available upon request. -
Can I get a sample before bulk order?
Yes, sample orders are welcome. We can provide one or two pieces for testing, with the sample cost deducted from your first bulk order if placed within 3 months. -
Do you provide custom fittings or special threads?
Yes, we can customize the end connections, such as BSP, JIS, or metric threads, as well as different pressure ratings (up to 3000 PSI) and body materials (e.g., 304 SS, brass). Minimum order quantities may apply for non-standard versions.
Trust Shanghai Zhibang Valve for your small hydraulic system needs – quality, precision, and global service since 2016.
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