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Oil Check Valve Dual Plate Design Cast Steel Disc NBR Seat LR Certified DN50-300mm Marine Grade
Product Spotlights
LR certified dual plate check valve with cast steel body and NBR seat, designed for marine & oil applications. Compact wafer/lug design minimizes pressure drop and water hammer. DN50-300mm, high corrosion resistance, ISO9001 quality. Customizable pressure ratings and end connections available.
Negotiable
MOQ: 1 Unit (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Material:
Cast Steel
size:
DN50-DN300
disc type:
Dual Plate
Payment & Shipping
Payment Methods:
Port of Shipment:
China
Delivery Detail:
Delivery time depends on order quantity.
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Material
Cast Steel
size
DN50-DN300
disc type
Dual Plate
seat material
NBR (Nitrile Butadiene Rubber)
certification
LR (Lloyd's Register)
grade
Marine Grade
end connection
Wafer or Lug type (optional)
pressure rating
Available upon request (Class 150/300 typical)
Shanghai Zhibang Valve Manufacture Co., Ltd (established 2016, ISO9001 certified) is proud to present our Oil Check Valve Dual Plate Design Cast Steel Disc NBR Seat LR Certified DN50-300mm Marine Grade. This valve is engineered for critical marine and oil&gas applications where reliability and compact installation are paramount. The dual plate design ensures minimal pressure drop and rapid closing with non-slam performance, while the cast steel body and NBR seat provide excellent resistance to hydrocarbons and seawater. Backed by our annual export value of US$1-1.5 million and shipped from major Chinese ports, this valve meets the highest industry standards.
Key Features & Technical Specifications
- Dual Plate Spring-Loaded Design – Ensures quick closure, reducing water hammer and system vibration.
- Cast Steel Body (WCB or WCC optional) – High strength and durability suitable for high-pressure marine environments.
- NBR Resilient Seat – Excellent oil resistance and tight sealing against a wide range of hydrocarbons and lubricants.
- LR (Lloyd’s Register) Type Approval – Complies with marine classification requirements for safety and reliability.
- Marine Grade Surface Treatment – Corrosion-resistant coating suitable for offshore and shipboard applications.
- Compact Wafer or Lug Design – Saves space and weight in tight piping layouts.
- Full Port or Reduced Bore Options – Available upon request for flow optimization.
- Operating Temperature Range – Typically -20°C to +80°C (depending on seating material); higher temperatures available with optional seats.
| Parameter | Value |
|---|---|
| Size Range | DN50 – DN300 (2″ – 12″) |
| Pressure Rating | PN10/16/25 or Class 150/300 (upon request) |
| Body Material | Cast Steel (WCB/WCC/WC6) |
| Disc Material | Cast Steel or Stainless Steel (SS304/316 optional) |
| Seat Material | NBR (Nitrile) – standard; FPM/Viton available |
| Temperature Range | -20°C to +80°C (NBR); customizable |
| Certification | LR Type Approval (marine classification) |
| End Connection | Wafer (standard) / Lug (optional) |
Advantages & Customer Benefits
- Installation Flexibility – The dual plate design allows installation in any orientation (horizontal, vertical, or inclined).
- Reduced Back Pressure – Low flow resistance compared to swing check valves, saving pumping energy.
- Non-Slam Operation – Spring-loaded plates prevent slamming and water hammer, extending system life.
- Minimal Maintenance – Simplified construction with few moving parts ensures long service intervals.
- Seawater & Oil Compatibility – NBR seat and marine coating resist corrosion from seawater, crude oil, and diesel fuels.
- International Standards – Designed per API 594, BS 1868, and ISO 5752 (face-to-face dimensions) – suitable for global projects.
Trust & Ordering Support
Shanghai Zhibang Valve Manufacture Co., Ltd has been a reliable manufacturer since 2016, with annual export value reaching US$1-1.5 million. Our products are shipped to North America, South America, Europe, Southeast Asia, Africa, Oceania, Middle East, and domestic markets. With ISO9001 quality management system and LR certification for this specific check valve, we ensure consistent quality and traceability. All valves undergo hydrostatic and pneumatic testing before dispatch. We welcome OEM/ODM customizations (e.g., special end connections, metal seats, higher pressure classes) – please contact our technical team for detailed proposals.
Frequently Asked Questions (FAQ)
-
Q: What media can this check valve handle?
A: The NBR seat is ideal for oil, petroleum products, diesel, lubricants, and water with oil content. For more aggressive chemicals or high-temperature media (above 80°C), an optional FPM/Viton seat is recommended. -
Q: Is the LR certification for marine classification mandatory?
A: Not for all applications, but for shipboard and offshore installations where Lloyd’s Register classification is required, this valve provides full compliance. We can also provide other classification society approvals upon request (e.g., DNV, ABS, CCS). -
Q: Can I use this valve in vertical pipelines?
A: Yes, the spring-assisted dual plate design works effectively in horizontal, vertical, and inclined installations. Ensure flow direction matches the arrow on the body. -
Q: What is the maximum working pressure?
A: Standard rating is PN16 (235 psi) or Class 150. Higher pressure classes (PN25/Class 300) are available as customized options – please specify when ordering. -
Q: How does the dual plate design compare to a swing check valve?
A: Dual plate check valves are more compact, lighter (20-30% weight reduction), and have faster closing action, reducing water hammer. They also cost less in large sizes. -
Q: Do you offer a corrosion-resistant coating for extreme marine environments?
A: Yes, we provide marine-grade epoxy coating (standard) and can apply zinc-rich primer, hot-dip galvanizing, or stainless steel overlay as per client requirement. -
Q: What is the typical lead time for DN200 and above?
A: For stock sizes (DN50-DN200), lead time is 15-20 days. Larger sizes (DN250-DN300) typically require 25-35 days, depending on customized options. Expedited service is available for urgent orders. -
Q: How do I ensure the sealing performance in low-pressure applications?
A: The spring-loaded plates provide tight shut-off even under very low differential pressure. For dry gas or low-pressure air, an optional soft seat (NBR or PTFE) ensures bubble-tight seal.
Contact us today for a quotation or technical datasheet. Shanghai Zhibang Valve – your partner in fluid control solutions.
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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