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Help CenterDual Plate Check Valve for Oil Systems Cast Steel Body Standard Compliant NBR Seal Factory Direct Supply
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Shanghai Zhibang Valve Manufacture Co., Ltd. presents our premium Dual Plate Check Valve for Oil Systems, featuring a robust cast steel body, standard-compliant design, and NBR (nitrile rubber) seals. As a factory-direct manufacturer established in 2016 with an annual export value of US$1 million to US$1.5 million, we deliver high-quality valves that meet rigorous industry demands. This check valve is engineered specifically for oil systems, offering reliable backflow prevention, low pressure drop, and long service life.
Our dual plate design uses two spring-loaded plates that close quickly when flow reverses, minimizing water hammer and protecting equipment. The cast steel body ensures strength and durability under high pressure, while the NBR seal provides excellent oil resistance and sealing performance. Each valve is manufactured under our ISO9001 quality management system and tested to ensure compliance with international standards such as API 594 and DIN 3840 (upon request).
Key Product Features & Benefits
- Dual Plate Design: Two spring-loaded plates ensure rapid closure, reducing water hammer and protecting pumps and pipelines.
- Cast Steel Body: High-strength carbon steel or stainless steel casting provides excellent mechanical properties and corrosion resistance for oil systems.
- NBR Seals: Oil-resistant nitrile rubber offers reliable sealing across a wide temperature range (-20°C to +100°C) and is compatible with mineral oils, fuels, and hydraulic fluids.
- Compact Wafer Style: Lightweight and short face-to-face dimensions allow easy installation between flanges, saving space and reducing weight.
- Low Pressure Drop: Streamlined flow path with minimal resistance reduces energy consumption and system operating costs.
- Standard Compliant: Designed to meet API 594, DIN 3840, and other international standards, ensuring interchangeability and reliability.
- Factory Direct Supply: Competitive pricing and full quality control from Shanghai Zhibang, with flexible customization options available.
Technical Specifications
| Parameter | Value |
|---|---|
| Body Material | Cast Steel (WCB / WCC / LCB) or Stainless Steel (CF8M) |
| Seal Material | NBR (Nitrile Rubber) – Oil resistant |
| Size Range | DN50 to DN600 (2" to 24") |
| Pressure Rating | Class 150 / 300 (PN10 ~ PN40 available) |
| Working Temperature | -20°C to +100°C (NBR) – higher temperature options available with other seals |
| Connection Type | Wafer (between flanges) per ASME B16.5 / EN 1092 |
| Application | Oil systems, petroleum, hydraulic, industrial fluids |
| Standards | API 594, DIN 3840, ISO 5752 (compatible) |
Why Choose Shanghai Zhibang as Your Supplier?
We are a direct manufacturer with over 8 years of valve production experience, serving customers across North America, South America, Europe, Asia, Africa, and Oceania. Our factory is ISO9001 certified, ensuring every valve undergoes strict quality checks from raw material to final testing. With an annual export value of US$1–1.5 million, we have established a reliable global supply chain and can ship from multiple Chinese ports including Shanghai, Guangzhou, Hong Kong, and Beijing.
Our dual plate check valves are backed by a comprehensive warranty and technical support. We also offer customization options such as different seal materials (Viton, EPDM), body materials (stainless steel, duplex), and special coatings. Whether you need standard stock items or tailored solutions, our team is ready to assist. Contact us today for competitive pricing and fast delivery!
Frequently Asked Questions (FAQ)
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Q: What is the difference between a dual plate check valve and a swing check valve?
A: A dual plate check valve uses two spring-loaded plates that close quickly, reducing water hammer and allowing vertical installation. It is more compact and lighter than a swing check valve. -
Q: Can this valve be used for water or steam systems?
A: While designed for oil systems with NBR seals, the valve can be adapted for other media by selecting appropriate seal materials (e.g., EPDM for water, Viton for aggressive chemicals). Contact us for recommendations. -
Q: What is the maximum working pressure for Class 150?
A: Class 150 corresponds to 20 bar at ambient temperature. For higher pressures, Class 300 (50 bar) or custom options are available. -
Q: Do you provide a test certificate?
A: Yes, each valve is hydrostatically tested and a test certificate can be issued upon request. Material certificates (EN 10204 3.1) are also available. -
Q: What is the lead time for standard sizes?
A: For sizes DN50-DN300, typical lead time is 15-30 working days. Larger or custom orders may require 30-45 days. We always confirm before production. -
Q: Can you install the valve in vertical pipelines?
A: Yes, dual plate check valves can be installed horizontally or vertically (flow upward recommended). Our design ensures reliable operation in both orientations. -
Q: What is the warranty period?
A: We offer a 12-month warranty from the date of shipment against manufacturing defects. Extended warranty is negotiable for large projects. -
Q: How do I choose the correct pressure class?
A: Select the class based on your system’s maximum operating pressure and temperature. Our technical team can help you determine the right rating if you provide your process parameters.
Shanghai Zhibang Valve Manufacture Co., Ltd. – Your reliable partner for high-quality industrial valves. Contact our sales team for a quote or technical consultation. We look forward to serving you!
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