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Help CenterVertical Lift Check Valve Hydraulic Station Oil Return Line for Industrial Hydraulic Power Units
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Shanghai Zhibang Valve Manufacture Co., Ltd., a trusted manufacturer since 2016 with an annual export value of US$1–1.5 million, proudly presents our Vertical Lift Check Valve Hydraulic Station Oil Return Line. Designed specifically for industrial hydraulic power units, this valve delivers reliable backflow prevention in oil return lines, ensuring system stability and extending equipment life. Our ISO 9001-certified production process guarantees consistent quality, and our global supply chain expertise ensures timely delivery to markets including North America, Europe, Asia, and beyond.
This check valve operates on a vertical lift principle, where the disc moves perpendicular to the seat, providing a tight seal even under low flow conditions. It is ideal for hydraulic stations where oil return lines must maintain unidirectional flow to prevent contamination or pressure surges. The valve is available in multiple materials and connection types to suit your specific system requirements.
Key Features & Technical Specifications
- Vertical Lift Design: Ensures rapid response to flow changes, reducing water hammer effects.
- Robust Construction: Body made from carbon steel or stainless steel (optional), with hardened seat and disc for long service life.
- Leak‑Tight Seal: Metal‑to‑metal or soft seal options available to meet different leakage class requirements.
- Low Pressure Drop: Optimized flow path minimizes energy loss in hydraulic circuits.
- Easy Maintenance: Top‑entry design allows quick access to internal components without removing the valve from the pipeline.
- Customizable Options: Connection types (threaded, flanged, NPT, BSP), sizes DN15 to DN50, and pressure ratings up to 350 bar.
| Parameter | Specification |
| Size Range | DN15 – DN50 (1/2" – 2") |
| Pressure Rating | PN16 – PN350 (customizable) |
| Temperature Range | -20°C to +120°C (optional higher) |
| Material | Carbon Steel (WCB), Stainless Steel (CF8/CF8M) |
| Connection Type | Threaded (NPT/BSP), Flanged (ANSI/DIN/JIS) |
| Seal Type | Metal‑to‑Metal or Soft Seal (PTFE/NBR) |
| Applicable Medium | Hydraulic oil, lubricating oil, water‑glycol fluids |
Benefits for Your Hydraulic System
- Prevent Backflow: Protects pumps and accumulators from reverse flow damage.
- Reduce Downtime: Reliable operation reduces maintenance frequency and unplanned shutdowns.
- Energy Efficient: Low pressure drop means less power consumption for hydraulic pumps.
- Long Service Life: Hardened internal parts resist wear from contaminated oil.
- Versatile Integration: Compatible with standard hydraulic manifolds and pipework.
At Shanghai Zhibang Valve, we understand the critical role of check valves in hydraulic power units. That’s why we offer rigorous testing – each valve is hydrostatically tested at 1.5x rated pressure and seat leakage tested per API 598. Our manufacturing facility in Shanghai, China, operates under the ISO 9001 quality management system, ensuring consistent product excellence.
With over 7 years of export experience and annual export value exceeding US$1 million, we have supplied hydraulic components to customers in North America, South America, Europe, Southeast Asia, the Middle East, Africa, and Oceania. Our port of shipment options include Shanghai, Guangzhou, Hong Kong, and Beijing, providing flexible logistics solutions.
Partner with a reliable manufacturer – choose Shanghai Zhibang Valve for your hydraulic check valve needs. Contact us today for a quote or technical consultation. We offer custom sizes, materials, and pressure ratings to match your exact specifications.
Frequently Asked Questions (FAQ)
Q1: What is the working principle of a vertical lift check valve?
A: The disc moves vertically away from the seat when flow is forward; when flow reverses, the disc returns to the seat due to gravity and spring force, preventing backflow. This design provides a quick response and low pressure drop.
Q2: Can this valve be used for high‑pressure hydraulic systems?
A: Yes, our valves are available with pressure ratings up to 350 bar (PN350). We can also customize higher ratings upon request. Please provide your working pressure and temperature for a tailored solution.
Q3: What materials are available for the valve body and trim?
A: Standard materials include carbon steel (WCB) and stainless steel (CF8/CF8M). Trim can be 13Cr, stainless steel, or stellite‑faced for severe service. Contact us for material compatibility with your hydraulic fluid.
Q4: How do I choose the correct connection type?
A: Selection depends on your existing piping system. Threaded connections (NPT or BSP) are common for smaller sizes; flanged connections (ANSI, DIN, JIS) are used for larger sizes or higher pressures. We can provide adapters if needed.
Q5: What is the typical lead time for orders?
A: For standard sizes and materials, lead time is 15–20 working days. Custom orders may require 25–35 days. We also offer express delivery for urgent requirements via air freight.
Q6: Do you provide test certificates or documentation?
A: Yes, we provide material certificates, hydrostatic test reports, and seat leakage test reports. ISO 9001 certification is available upon request. For special requirements like NACE or API, please discuss with our sales team.
Q7: Is the valve suitable for vertical or horizontal installation?
A: Our vertical lift check valve is designed for vertical installation (flow upward). For horizontal pipelines, we recommend a swing check or tilting disc check valve. We can advise on the best option for your layout.
Q8: What is the warranty period?
A: We offer a 12‑month warranty from the date of shipment against manufacturing defects. Extended warranty options are available for large projects.
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