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Help CenterAPI Standard Check Valve, 1 Year Warranty, Mill Test Report Included, for Crude Oil Transmission
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Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to introduce our API Standard Check Valve, specifically designed for crude oil transmission applications. As a manufacturer established in 2016 with an annual export value of US$1 million to US$1.5 million, we combine over 8 years of engineering expertise with rigorous quality control. Every valve comes with a 1-year warranty and a Mill Test Report, ensuring full traceability of material properties. This check valve is engineered to prevent backflow in high-pressure, high-temperature crude oil pipelines, delivering reliable performance and long service life.
Our check valve is manufactured in compliance with API 6D and API 598 standards, making it suitable for demanding oil and gas environments. The valve features a robust swing-type design with a hinged disc that automatically closes when flow reverses, minimizing pressure drop and water hammer. Available in various materials and pressure classes, it can be customized to meet specific pipeline requirements. Below are the key technical specifications:
| Parameter | Specification |
| Size Range | 2" – 24" (DN50 – DN600) |
| Pressure Rating | Class 150 – Class 2500 |
| Material Options | WCB, WCC, LCB, CF8, CF8M (Duplex, Inconel upon request) |
| End Connections | Flanged (RF, RTJ), Butt-weld, Threaded |
| Temperature Range | -29°C to +425°C (depending on material) |
| Design Standard | API 6D, API 598 |
| Testing | Hydrostatic, Pneumatic, Shell & Seat (per API 598) |
The key advantages of our API Standard Check Valve include:
- Durable Construction: Heavy-duty body and disc designed to withstand high pressure and erosion from crude oil.
- Low Pressure Drop: Optimized flow path reduces turbulence, saving pump energy.
- Full Traceability: Each valve includes a Mill Test Report (MTR) for material certification and chemical composition.
- Zero Leakage: Metal-to-metal or soft-seat options ensure bubble-tight shut-off.
- Simple Maintenance: Top-entry design allows easy access to internal parts without removing the valve from the pipeline.
- 1-Year Warranty: Covers manufacturing defects, backed by our ISO9001:2015 quality management system.
Our check valves are widely used in crude oil transmission, refinery piping, petrochemical plants, and offshore platforms. They are tested in our Shanghai facility before shipment, and we offer flexible packaging (plywood cases, crates) to ensure safe delivery. With ports of shipment including Shanghai, Guangzhou, Hong Kong, and Beijing, we serve customers in North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. Our annual export value of US$1 million to US$1.5 million demonstrates the trust our global clients place in our products. We invite you to contact us for a quote or sample – our team will provide technical support and after-sales service.
Frequently Asked Questions
Q1: What materials are available for the check valve?
A: Common materials include carbon steel (WCB, WCC), low-temperature carbon steel (LCB), stainless steel (CF8, CF8M), and duplex alloys. Other materials like Inconel or Hastelloy are available upon request.
Q2: Is the Mill Test Report included with every valve?
A: Yes, a Mill Test Report (MTR) is provided with each valve, documenting the chemical composition and mechanical properties of the materials used in the body, bonnet, and disc.
Q3: Can the valve be used for high-temperature crude oil?
A: Yes, depending on the material selected. For example, stainless steel versions can handle up to 425°C, while carbon steel is suitable up to 425°C under proper pressure ratings.
Q4: What certifications does your factory hold?
A: Our factory is ISO9001:2015 certified. We also comply with API 6D and API 598 standards. Specific certifications like CE or ATEX can be arranged upon request.
Q5: How long is the warranty period?
A: All our check valves come with a standard 1-year warranty against manufacturing defects. Extended warranty options are available for custom orders.
Q6: Can you provide a sample for testing?
A: Yes, we offer sample orders. Please contact us with your required size, pressure class, and material, and we will prepare a sample for evaluation.
Q7: What is the typical lead time?
A: For standard sizes (2"-12") in carbon steel, lead time is 15-20 working days. Custom materials or larger sizes may take 25-35 working days depending on the order quantity.
Q8: How do you ensure quality before shipment?
A: Each valve undergoes hydrostatic testing, seat leakage testing, and visual inspection according to API 598. A test report is included in the shipment. Our ISO9001 quality system ensures consistent production standards.
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