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Help CenterCarbon Steel Marine Globe Check Valve DN50 PN4.0MPa Flanged End Rising Stem CCS Certified
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Shanghai Zhibang Valve Manufacture Co., Ltd takes great pride in introducing our premium Carbon Steel Marine Globe Check Valve DN50 PN4.0MPa Flanged End Rising Stem CCS Certified. As a dedicated manufacturer established in 2016 with an annual export value of USD 1-1.5 million and ISO9001 certification, we deliver valves that meet the stringent demands of the marine industry. This combined globe and check valve offers reliable flow control and automatic reverse flow prevention, ensuring safety and efficiency in ship piping systems. Our valves are trusted by clients across North America, South America, Europe, Asia, Africa, and Oceania, and are shipped from major Chinese ports including Shanghai, Guangzhou, Hong Kong, and Beijing.
The DN50 globe check valve is engineered for high-pressure marine applications up to PN4.0MPa. It features a rising stem design for visual indication of valve position, making it ideal for critical systems where immediate status recognition is required. The flanged end connection simplifies installation and maintenance, while the carbon steel body provides excellent strength and corrosion resistance in demanding seawater environments. With CCS (China Classification Society) certification, this valve complies with international marine standards, guaranteeing safety and reliability on board.
Key Features & Technical Specifications
| Parameter | Value |
| Nominal Diameter | DN50 (2") |
| Pressure Rating | PN4.0MPa (580 psi) |
| Body Material | WCB Carbon Steel |
| Trim Material | 13Cr / SS304 (optional) |
| End Connection | Flanged (RF, raise face) |
| Stem Design | Rising stem (OS&Y) |
| Operation | Handwheel (manual) |
| Standards | GB/T, ASME B16.34, CCS |
Product Advantages & Customer Benefits
- Dual Functionality: Combines shut-off (globe) and check (non-return) functions in one valve, reducing piping footprint and installation costs.
- Rising Stem Indicator: Provides clear visual confirmation of the valve opening and closing status, enhancing operational safety.
- High Durability: Carbon steel body with optional stainless steel trim resists corrosion and wear, ensuring long service life in marine environments.
- Flanged Connection: Easy to install and remove for maintenance; compatible with standard marine flanges (PN40 RF).
- Certified Quality: CCS certification guarantees compliance with marine classification society rules, giving ship owners and operators peace of mind.
- Wide Applicability: Suitable for seawater, fuel oil, lube oil, cooling water, and other media commonly found on ships and offshore platforms.
- Temperature Range: Operating temperature from -20°C to +350°C (depending on seat material and packing).
- Low Maintenance: Rising stem design with yoke provides easy access to packing gland for adjustment without removing the valve from the line.
Technical Details & Structural Design
The globe check valve utilizes a horizontal disc design that closes automatically under reverse flow while allowing manual throttling via the handwheel. The body is cast from high-quality WCB carbon steel per ASTM A216, ensuring excellent mechanical properties. The disc and seat ring are heat-treated to increase hardness and resist erosion. The rising stem features ACME threads with a large yoke bushing for smooth operation. The packing system uses flexible graphite rings with a lantern ring for optional lubrication or leak detection. All pressure-containing parts are hydrostatically tested at 1.5 times the rated pressure before shipment.
This valve is designed for marine grade applications, meaning it can withstand vibration, shock, and corrosive atmospheres typical in engine rooms, ballast lines, and fire-fighting systems. The flanged ends conform to PN40 RF faces according to EN 1092-1 or ANSI B16.5 Class 300, making it interchangeable with standard marine piping.
Trust & Commitment from Shanghai Zhibang Valve
As a reliable manufacturer with ISO9001 quality management certification, we ensure every globe check valve is produced under strict quality control processes. Our annual export value of USD 1-1.5 million reflects global customer confidence in our products. We serve diverse markets including North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, East Asia, Western Europe, Central America, Northern Europe, Southern Europe, South Asia, and the domestic market. The valve is ready for shipment from our warehouses in Shanghai, Guangzhou, Hong Kong, and Beijing.
By choosing our CCS-certified marine globe check valve, you invest in a product that undergoes rigorous testing: 100% shell and seat pressure tests, material inspection certificates, and optional NDT (RT/MT) upon request. We offer customization options such as alternative trims (SS316, Monel), extended bonnet for high temperature, and actuator mounting pad for automated operation. Contact us today for a quote or technical consultation.
Frequently Asked Questions (FAQ)
Q1: What does CCS certification mean for this valve?
A1: CCS (China Classification Society) certification indicates that the valve has been designed, manufactured, and tested according to the classification society's rules for marine equipment. It is essential for ships and offshore installations requiring class approval.
Q2: Can this valve be used for steam service?
A2: Yes, depending on the seat and packing material. The standard version with carbon steel body and 13Cr trim is suitable for up to 350°C. For higher temperatures, optional flexible graphite packing and alloy trim can be provided. Please consult our technical team for specific requirements.
Q3: What is the difference between a globe check valve and a standard swing check valve?
A3: A globe check valve combines a globe valve (for throttling and shut-off) with a check function, allowing it to prevent backflow while also being manually closed. A swing check valve only prevents reverse flow and cannot be used for regulation. The globe check design provides more control.
Q4: Is the valve supplied with flanges or welding ends?
A4: This model features flanged ends. We also offer butt-weld or socket-weld ends as customized options. Please specify your preference when ordering.
Q5: What is the weight of this DN50 valve?
A5: The approximate weight is 8-10 kg, depending on the exact face-to-face dimension and trim. A detailed datasheet with shipping weight is available upon request.
Q6: Do you provide a material certificate with each valve?
A6: Yes, we supply a mill test certificate for the body material (WCB) as standard. Additional certificates for trim materials or NDT reports can be provided at an extra cost.
Q7: What packing material is used? Is it maintenance-free?
A7: The standard packing is flexible graphite with a stainless steel anti-extrusion ring. It provides a reliable seal and can be adjusted via the gland nut. Periodic packing tightening is normal, and replacement intervals depend on service conditions.
Q8: Can I get a sample before mass production?
A8: Yes, we accept sample orders. The lead time for a sample is typically 15-25 days after confirmation. For stock items, we can ship immediately.
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