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Home > Industrial Equipment & Components > Valve > Check Valve > Marine Dual Plate Check Valve for Oil With 1 Year Warranty and Mill Test Report Cast Steel NBR
Marine Dual Plate Check Valve for Oil With 1 Year Warranty and Mill Test Report Cast Steel NBR
Product Spotlights
Marine Dual Plate Check Valve for Oil: premium cast steel body, NBR sealing, compact wafer design, non-slam operation, low pressure drop. Includes 1-year warranty and Mill Test Report. ISO9001 certified manufacturer with proven export track record. Ideal for oil, seawater, and marine systems.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Material:
Other, Cast Steel (WCB, LCB, etc.)
Application:
Other, Marine
Seal Material:
NBR (Nitrile Butadiene Rubber)
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Material
Other, Cast Steel (WCB, LCB, etc.)
Application
Other, Marine
Seal Material
NBR (Nitrile Butadiene Rubber)
Type
Dual Plate (Double Disc)
Size Range
DN50 - DN600 (2“ - 24“)
Pressure Rating
PN10/16/25, Class 150/300
Connection
Wafer or Lug Style
Design Standard
API 594, BS 1868, ISO 5752
Working Temperature
-20°C to +120°C (NBR)
Warranty
1 Year
Shanghai Zhibang Valve Manufacture Co., Ltd proudly presents our Marine Dual Plate Check Valve for Oil, a high-performance solution designed to meet the rigorous demands of marine and oil-handling systems. Manufactured with premium Cast Steel and NBR (Nitrile Butadiene Rubber) sealing, this valve ensures reliable backflow prevention, minimal pressure drop, and long-term durability in corrosive and high-pressure environments. As a leading manufacturer established in 2016, we combine advanced CNC machining, stringent quality control, and ISO9001-certified production processes to deliver valves that exceed industry expectations. With annual exports exceeding US$1 million, our products are trusted by clients across North America, South America, Europe, Southeast Asia, Africa, the Middle East, and Oceania.
Key Features & Technical Specifications
- Compact Dual-Plate Design: Reduces face-to-face length, saves space, and lowers installation costs compared to traditional swing check valves.
- Cast Steel Body: Offers high strength, excellent wear resistance, and compatibility with oil, seawater, and other demanding media. Available in WCB, LCB, and other grades.
- NBR Sealing Ring: Outstanding oil resistance, good elasticity, and stable performance at operating temperatures from -20°C to +120°C.
- Non-Slam Operation: Spring-assisted disc closure minimizes water hammer and protects downstream equipment.
- Low Pressure Drop: Streamlined flow path ensures minimal energy loss, enhancing system efficiency.
- Multiple Connection Options: Available in wafer or lug style for easy installation between flanges.
- Mill Test Report Included: Every valve is supplied with a comprehensive Mill Test Certificate verifying material properties and pressure integrity.
- 1-Year Warranty: Backed by our commitment to quality and after-sales support.
Product Parameters (Typical Range)
| Parameter | Value |
|---|---|
| Body Material | Cast Steel (WCB, LCB, or as specified) |
| Seal Material | NBR (Nitrile) |
| Disc Material | Stainless Steel (SS304, SS316, or optional) |
| Spring Material | Stainless Steel (SS301, SS316) |
| Size Range | DN50 to DN600 (2" to 24") |
| Pressure Rating | PN10, PN16, PN25; Class 150, Class 300 |
| Temperature Range | -20°C to +120°C (with NBR) |
| Connection Type | Wafer (standard), Lug (optional) |
| Design Standard | API 594, BS 1868, ISO 5752, EN 1092-1 |
| Face-to-Face Length | Per API 594 or customer specification |
| Test Pressure (Shell) | 1.5 x Rated Pressure |
| Test Pressure (Seat) | 1.1 x Rated Pressure |
| Warranty | 1 Year |
| Documentation Included | Mill Test Report (MTR), Inspection Certificate, Warranty Card |
Advantages & Customer Benefits
- Superior Corrosion Resistance: Cast steel body with optional anti-corrosion coating (epoxy or zinc-rich) ensures long service life in marine and oil environments.
- Easy Maintenance: The dual-plate design allows quick disassembly and replacement of internal parts without removing the valve from the pipeline.
- Cost Savings: Lightweight and short face-to-face reduces material and installation costs compared to conventional check valves.
- Versatile Application: Ideal for crude oil, fuel oil, lubricating oil, produced water, and seawater in offshore platforms, tanker terminals, and refineries.
- Reliable Sealing: NBR seat provides bubble-tight sealing under low pressure and prevents leakage during reverse flow.
- Customizable Options: Available with special trims (SS316 disc, PTFE seat), higher pressure ratings, and extended temperature ranges upon request.
Trust & Quality Assurance
Shanghai Zhibang Valve Manufacture Co., Ltd has been a trusted valve manufacturer since 2016, exporting over US$1 million to US$1.5 million annually to more than 15 countries and regions. Our factory is ISO9001 certified, ensuring every production step, from raw material inspection to final hydrostatic testing, meets the highest standards. Each Marine Dual Plate Check Valve is accompanied by a Mill Test Report that details the chemical composition and mechanical properties of the cast steel used, giving you full traceability and peace of mind.
We ship from major Chinese ports including Shanghai, Guangzhou, Hong Kong, and Beijing, providing flexible logistics solutions to global clients. Our dedicated after-sales team offers prompt technical support and replacement parts throughout the 1-year warranty period and beyond. Whether you need a standard size or a custom configuration, we deliver consistent quality and competitive pricing.
Contact us today for a quote or technical consultation. Experience the reliability of a valve built for the toughest marine oil applications – backed by a manufacturer that prioritizes your success.
Frequently Asked Questions (FAQ)
-
Q1: What is the difference between a dual plate check valve and a swing check valve?
A dual plate check valve uses two spring-loaded half-discs that close quickly, reducing water hammer. It is shorter in length and lighter than a swing check valve, making it ideal for space-constrained marine and oil applications. -
Q2: Can this valve be used for hot oil above 120°C?
The standard NBR seal is rated for -20°C to +120°C. For higher temperature oil applications, we offer optional seal materials such as FKM (Viton) or PTFE, which can handle up to 200°C or more. Please specify your temperature requirement when ordering. -
Q3: Is the Mill Test Report included with every valve?
Yes, each valve ships with a Mill Test Report (MTR) that certifies the chemical and mechanical properties of the cast steel body. Additional third-party inspection reports can also be arranged upon request. -
Q4: What is the typical lead time for standard sizes?
For standard sizes (DN50-DN300, Class 150/300), our lead time is approximately 15-25 working days depending on order volume. Custom sizes or special materials may require 30-45 working days. Contact our sales team for exact delivery estimates. -
Q5: Does the valve meet marine classification society requirements?
Our valves are designed to meet common industry standards such as API 594 and ISO 5752. If you require classification society approval (e.g., DNV, ABS, Lloyds), we can provide valves with additional certification at an extra cost. Please advise your specific class requirement. -
Q6: Can the valve be mounted in vertical pipelines?
Yes, the dual plate check valve can be installed in vertical or horizontal pipelines with flow upward. For vertical downward flow, a spring-assisted closing mechanism is recommended to ensure proper sealing. Our standard design works well in both orientations. -
Q7: What types of flange connections are compatible?
The wafer-style valve simply clamps between two pipeline flanges (ANSI, DIN, JIS, etc.). The lug-style version has threaded inserts that allow bolting directly to flanges. Both types are available to match your existing piping system. -
Q8: How do you handle after-sales service for overseas customers?
We provide technical support via email, phone, or video call. If a manufacturing defect is identified within the 1-year warranty, we will replace or repair the valve free of charge. Our export team has extensive experience dealing with international logistics and customs.
Send Inquiry to This Supplier
1Yr
Business Type
Manufacturer
Year Established
2016
Annual Export Value
US$1 Million - US$1.5 Million
Product Certifications
ISO9001
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