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Help CenterWafer Type Marine Check Valve, DN600, PN1.6MPa, Compliant With CB/T4303 Standard
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As a professional manufacturer of industrial valves with a strong presence in the global marine sector, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to introduce our high-performance Wafer Type Marine Check Valve, DN600, PN1.6MPa. Engineered specifically to meet the rigorous demands of shipboard piping systems, this valve is designed to prevent backflow, protect critical equipment, and ensure the safe and efficient operation of your vessel's seawater, ballast, cooling, and firefighting lines. Built in full compliance with the CB/T4303 Standard, our valve offers reliable, maintenance-free service in the challenging marine environment.
This valve is a cornerstone of our product line, reflecting our commitment to quality and durability since our establishment in 2016. We understand that marine applications require components that can withstand corrosion, vibration, and pressure fluctuations, and our DN600 check valve is manufactured to excel under these conditions. Its compact wafer design makes it an ideal choice for space-constrained engine rooms and piping networks, providing a robust sealing solution without the need for flanges or extensive gasketing.
The core function of this non-return valve is to allow fluid flow in one direction while automatically closing to prevent reverse flow (backflow) when the upstream pressure drops. This is critical for protecting pumps, compressors, and other equipment from damage. The valve's simple yet effective spring-assisted disc mechanism ensures quick, positive sealing, minimizing water hammer and pressure surges in the pipeline.
- Compact & Lightweight Wafer Design: Installs directly between two pipeline flanges, significantly reducing overall weight and space requirements compared to flanged check valves. This is a major advantage in marine construction where weight and space optimization are paramount.
- CB/T4303 Standard Compliance: Manufactured specifically to meet the Chinese shipbuilding standard CB/T4303, ensuring the valve's design, materials, pressure rating, and testing procedures are suitable for marine service. This provides buyers with confidence in its application suitability.
- Robust Construction for Marine Environment: The valve body and internal components are selected from materials with excellent corrosion resistance. Common options include cast iron with epoxy coating, ductile iron, or cast steel, paired with sealing elements like NBR or EPDM that resist seawater degradation.
- Spring-Assisted, Quick Closing Disc: Incorporates a spring to assist the disc in closing rapidly once forward flow stops. This feature is crucial for minimizing slam and the associated water hammer, protecting the entire piping system from shock loads.
- Bidirectional Sealing (Optional): Depending on the seat design, some models can provide effective sealing in both flow directions, offering an extra layer of protection in complex system layouts.
- Low Pressure Drop: The streamlined internal passage and disc design minimize flow resistance, helping to maintain system efficiency and reduce pumping energy costs.
- Maintenance-Free Operation: Designed for long service life with minimal intervention. The simple internal mechanism has no external linkages or complicated parts that require regular adjustment.
| Parameter | Specification |
| Valve Type | Wafer Check Valve, Non-Return Valve |
| Nominal Diameter (DN) | 600 mm |
| Pressure Rating (PN) | 1.6 MPa (16 Bar, ~232 PSI) |
| Applicable Standard | CB/T4303 (Marine Valve Standard) |
| Connection | Wafer (Between Flanges), RF Flange Face |
| Body Material | Cast Iron, Ductile Iron, Cast Steel (Customizable) |
| Disc Material | Ductile Iron with Epoxy / Rubber Coating |
| Seat Seal Material | NBR, EPDM, PTFE (Selectable) |
| Spring Material | Stainless Steel |
| Flow Direction | Horizontal or Vertical (Upward Flow Recommended) |
| Test Standards | Shell Test, Seat Test per CB/T4303 |
- Enhanced System Safety: Prevents dangerous backflow in seawater, ballast, and fire main systems, protecting expensive pumps and ensuring operational integrity.
- Reduced Installation Time & Cost:The wafer design eliminates the need for separate flange pairs and numerous bolts, speeding up installation and lowering labor and material costs.
- Space and Weight Savings: Its compact profile is ideal for tight engine room layouts, contributing to overall vessel weight reduction, which can impact fuel efficiency.
- Long-Term Reliability: Constructed from marine-grade materials and tested to relevant standards, it delivers a long service life with minimal downtime, reducing total cost of ownership.
- Global Supply Chain Support: With annual export values between US$1-1.5 Million and shipments from major ports like Shanghai, Guangzhou, and Hong Kong, we reliably supply clients across North America, South America, Europe, Southeast Asia, Africa, and Oceania.
Shanghai Zhibang's manufacturing processes are backed by ISO9001 certification, ensuring consistent quality control from raw material inspection to final testing. Our DN600 Marine Check Valve is not just a component; it's a commitment to the safety and efficiency of your maritime operations. Trusted by shipyards and marine equipment suppliers worldwide, we provide valves that meet exacting specifications.
When you choose this valve, you are selecting a product from an established manufacturer with a proven track record in serving diverse global markets. We invite you to contact us for a detailed quotation, technical drawings, or to discuss custom material options tailored to your specific fluid media and operating conditions. Secure your vessel's piping systems with a reliable, standards-compliant solution.
Q1: What is the main advantage of a wafer-type check valve over a flanged type for marine use?
A1: The primary advantage is its compact and lightweight design. It installs between two existing flanges, saving significant space and weight—critical factors in ship design. It also requires fewer bolts, simplifying installation and maintenance.
Q2: Can this DN600, PN1.6MPa valve be used for other fluids besides seawater?
A2: Yes. While designed for marine applications, its construction allows it to handle various fluids like fresh water, oil, air, and other non-aggressive media. The suitability depends on the selected seat and body materials, which can be customized upon request.
Q3: Is this valve suitable for vertical installation?
A3: Yes, it can be installed in vertical pipelines. However, for optimal performance and to ensure proper disc closure, it is recommended that the flow direction is upward. Installation orientation should be confirmed during system design.
Q4: What does compliance with the CB/T4303 standard mean for me as a buyer?
A4: Compliance with CB/T4303 signifies that the valve is designed, manufactured, and tested according to a recognized standard specifically for marine valves in China. It provides assurance regarding pressure ratings, materials, dimensions, and testing protocols suitable for shipboard environments.
Q5: What materials are typically used for the body and seat to resist seawater corrosion?
A5: Common body materials include cast iron with a thick epoxy coating or cast steel. For the seat seal, EPDM or NBR rubber offers good resistance to seawater. For specific chemical compatibility, alternative materials like PTFE or special alloys are available.
Q6: Does the valve come with a spring, and what is its purpose?
A6: Yes, it features a stainless steel spring. The spring assists in closing the disc swiftly once forward flow velocity drops, preventing slow closing that can lead to water hammer (slam) and protecting the piping system from shock pressure waves.
Q7: Can I get this valve in other sizes or pressure ratings?
A7: Absolutely. As a manufacturer, Shanghai Zhibang can produce wafer check valves in a wide range of sizes (DN50 to DN1200+) and pressure classes (PN6 to PN25/Class 150 to Class 300). Please inquire with your specific requirements.
Q8: What is your lead time for an order of this valve, and what packaging is used?
A8: Lead times vary based on order quantity and current production schedule. Standard valves may have shorter lead times. For export, valves are typically packaged in wooden crates with internal waterproofing to ensure they arrive in perfect condition, ready for installation.
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