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Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016 and certified under ISO9001 quality management system, proudly presents the Vertical Lift Check Valve Hydraulic Station Oil Return Line 304 Stainless Steel DN25 1.6MPa. This valve is engineered specifically for hydraulic oil return circuits, ensuring reliable backflow prevention and system stability. With annual export value exceeding US$1 million and a global footprint spanning North America, Europe, Asia, and Africa, our products are trusted by industrial clients worldwide.
The vertical lift check valve design utilizes a disc that moves perpendicularly to the seat, providing a tight seal even under low flow conditions. The 304 stainless steel construction offers excellent corrosion resistance against hydraulic oils, water, and mild chemicals, making it ideal for hydraulic stations, lubrication systems, and industrial fluid handling. The DN25 (1-inch) nominal diameter and 1.6MPa pressure rating align with common hydraulic system requirements.
Our valves are manufactured with precision machining and strict quality control, ensuring consistent performance and long service life. The compact vertical configuration saves space in piping layouts, and the easy maintenance design allows for quick inspection and cleaning.
Key Features & Technical Specifications
- Vertical Lift Mechanism: Ensures positive sealing with minimal pressure drop, suitable for both horizontal and vertical installations.
- 304 Stainless Steel Body & Disc: High corrosion resistance, durability, and compatibility with a wide range of hydraulic fluids.
- DN25 (1 inch) Nominal Diameter: Standard size for hydraulic return lines, easily integrated into existing systems.
- 1.6MPa Rated Pressure: Suitable for medium-pressure hydraulic circuits up to 232 psi.
- Low Opening Pressure: The lightweight disc responds quickly to flow changes, preventing water hammer.
- Customizable Connection Options: Available with threaded (BSP/NPT) or flanged ends to match your piping requirements.
- Optional Seal Materials: PTFE for high-temperature applications, NBR for oil resistance, or Viton for aggressive chemicals.
- Compliance with International Standards: Designed and tested according to API 6D, BS 1868, and ISO 17292 guidelines.
| Parameter | Value |
| Type | Vertical Lift Check Valve |
| Material | 304 Stainless Steel |
| Nominal Diameter | DN25 (1 inch) |
| Pressure Rating | 1.6MPa (232 psi) |
| Connection Type | Threaded (BSP/NPT) or Flanged |
| Seal Material | PTFE, NBR, or Viton (optional) |
| Operating Temperature | -20°C to +150°C (depending on seal) |
| Media | Hydraulic oil, water, air, mild chemicals |
| Disc Type | Lift disc (vertical movement) |
The vertical lift check valve offers significant advantages over swing check valves in hydraulic systems: it is less prone to slamming, provides a tighter seal at low flow rates, and requires less maintenance. The 304 stainless steel material ensures no rust contamination of the hydraulic fluid, preserving system cleanliness and extending component life.
For hydraulic station operators, this valve directly improves reliability by preventing reverse flow that could damage pumps or cause erratic actuator movements. The compact design allows installation in tight spaces, such as valve manifolds or near reservoir connections. Customers can choose between threaded ends for easy replacement or flanged ends for high-pressure flanged connections.
Why Choose Shanghai Zhibang Valve?
Since 2016, we have been dedicated to manufacturing high-quality industrial valves. Our ISO9001 certification ensures that every product undergoes strict quality checks from raw material to final assembly. With an annual export value of US$1 million to US$1.5 million, we have shipped to over 20 countries including the United States, Germany, Brazil, Saudi Arabia, and Australia. Our flexible customization capabilities allow us to meet specific connection, seal, and material requirements.
We provide comprehensive technical support, including installation guidance, troubleshooting, and after-sales service. All valves are individually pressure-tested before shipment, and we offer a 12-month warranty against manufacturing defects. Our port of shipment options (Shanghai, Guangzhou, Hong Kong, Beijing) ensure efficient logistics worldwide.
Invest in the Vertical Lift Check Valve Hydraulic Station Oil Return Line 304 Stainless Steel DN25 1.6MPa for a reliable, long-lasting solution that protects your hydraulic system. Contact us today for a quote or to discuss your custom requirements. We are ready to partner with you for your next project.
Frequently Asked Questions (FAQ)
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Q: What is the difference between a vertical lift check valve and a swing check valve?
A: A vertical lift check valve uses a disc that moves up and down perpendicular to the seat, providing a tighter seal and faster response. It is better suited for vertical pipe runs and low-flow conditions, while swing check valves rely on a hinged disc that swings open and are more prone to slamming. -
Q: Can this valve be used for water or other fluids besides hydraulic oil?
A: Yes, the 304 stainless steel construction is compatible with water, air, and many light chemicals. However, for aggressive fluids or high-temperature applications, we recommend confirming with our technical team to select the appropriate seal material. -
Q: What connection types are available for DN25?
A: We offer threaded connections (BSP and NPT) and flanged connections (ANSI 150, PN16, etc.). Please specify your requirement when ordering. Adapters are also available upon request. -
Q: Is the valve suitable for horizontal installation?
A: Yes, the vertical lift check valve can be installed horizontally or vertically. However, for optimal performance, vertical installation with upward flow is recommended. In horizontal lines, ensure the spring (if applicable) is sufficient to close the disc. -
Q: What is the maximum operating temperature?
A: The standard PTFE seal allows up to 150°C (302°F). For higher temperatures, we can provide metal seals or special alloys. The 304 stainless steel body can withstand up to 400°C in non-corrosive environments. -
Q: Do you provide custom sizes or higher pressure ratings?
A: Yes, we can manufacture custom sizes (DN15 to DN200) and pressure ratings up to 10MPa. Please contact our sales team with your requirements. -
Q: How do I choose the correct spring for low-pressure applications?
A: Our valves are available with different spring tensions. For very low cracking pressure (e.g., 0.02MPa), we recommend a light spring or springless design. Consult our technical datasheet for guidance. -
Q: What is the warranty period and after-sales support?
A: We offer a 12-month warranty from the date of shipment against manufacturing defects. Our after-sales team is available via email and phone to assist with installation, troubleshooting, and replacement parts.
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