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Help CenterDN65-DN150 Marine Straight Globe Check Valve PN4.0MPa Flanged End Dual Function Regulating & Non-Return
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Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016 with an annual export value of US$1–1.5 million, is proud to present our DN65–DN150 Marine Straight Globe Check Valve PN4.0MPa Flanged End Dual Function Regulating & Non-Return. This innovative valve integrates two critical functions into a single, space-saving unit: precise flow regulation and reliable backflow prevention. Designed specifically for demanding marine environments, it meets the highest industry standards while offering exceptional durability and ease of maintenance. Whether you are outfitting a new vessel or upgrading an existing system, this valve delivers the performance and reliability your operations demand.
Key Features & Technical Specifications
- Dual Function Design: Combines a globe valve (for throttling/regulating flow) and a check valve (to prevent reverse flow) in one compact body. This eliminates the need for two separate valves, reducing installation cost and space.
- Straight Globe Pattern: Optimized flow path minimizes pressure drop while providing excellent regulation characteristics. Suitable for water, oil, and gas media common in marine systems.
- Flanged End Connection: Available in DN65 (2.5") to DN150 (6") sizes, with flanges conforming to PN4.0MPa (Class 300 equivalent). Custom flange drilling (DIN, ANSI, JIS) available upon request.
- Robust Construction: Body and bonnet made from cast steel (WCB) or optional stainless steel (CF8M) for corrosion resistance in saltwater environments. Disc and seat feature durable seating surfaces (stellite overlay optional) for long service life.
- Self-Actuated Non-Return: The spring-assisted disc closes automatically when flow reverses, providing reliable protection against backflow without external power.
- Manual Regulation Capability: A handwheel or gear operator (depending on size) allows precise setting of the flow rate. The valve can be locked in any position for consistent process control.
- High-Temperature & Pressure Tolerance: Designed for working temperatures up to 425°C (depending on material), with a pressure rating of PN4.0MPa (580 psi) at ambient temperature.
Technical Data Sheet
| Parameter | Specification |
|---|---|
| Nominal Diameter | DN65, DN80, DN100, DN125, DN150 |
| Pressure Rating | PN4.0MPa (Class 300) |
| Test Pressure Shell | 6.0 MPa (870 psi) |
| Test Pressure Seat | 4.4 MPa (638 psi) |
| Temperature Range | -20°C to 425°C (depending on material selection) |
| Connection Standard | GB/T 9113, ANSI B16.5, DIN 2633 (customizable) |
| Applicable Media | Fresh water, seawater, fuel oil, lube oil, compressed air |
| Operator Type | Handwheel (standard), gearbox (DN150) |
Benefits for Your Marine System
- Space & Weight Savings: One valve replaces two, reducing pipework complexity and overall system weight – critical in shipboard applications.
- Lower Installed Cost: Fewer valves, flanges, gaskets, and labor hours translate into immediate cost savings.
- Enhanced System Safety: Positive backflow prevention protects sensitive equipment (pumps, meters) from damage, while precise regulation ensures optimal flow rates for various ship systems.
- Reduced Maintenance: Rugged construction and corrosion-resistant materials extend service intervals. Seat and disc can be inspected and serviced without removing the valve from the line.
- Versatile Application: Ideal for ship ballast systems, fire mains, cooling water circuits, and fuel oil transfer lines.
Quality Assurance & Trust
Shanghai Zhibang Valve Manufacture Co., Ltd. holds ISO9001:2015 quality management system certification, ensuring every valve is manufactured under strict process controls. Our annual export value of over US$1 million, combined with a global presence across North America, South America, Europe, Asia, Africa, and Oceania, reflects the trust our customers place in our products. Each valve undergoes hydrostatic and pneumatic testing before shipment. We offer flexible shipping from Shanghai, Guangzhou, Hong Kong, and Beijing to meet your logistics needs.
Contact us today for a quote or technical consultation. Our experienced team can help you select the correct material and trim options for your specific marine application. Experience the reliability of a dual-function valve that simplifies your system without compromising performance.
Frequently Asked Questions (FAQ)
Q1: What is the difference between this dual-function valve and a standard check valve?
A standard check valve only prevents backflow. Our valve also allows manual regulation of flow rate, acting like a globe valve. This combination eliminates the need for a separate regulating valve, providing more precise control and saving space.
Q2: Can this valve be used in horizontal and vertical pipe installations?
Yes. The straight globe design performs well in both orientations. However, for vertical lines with upward flow, please consult our technical team to confirm spring selection and ensure proper disc operation.
Q3: What materials are available for saltwater service?
We offer stainless steel (CF8M) body and internals as an option, which provides excellent resistance to seawater corrosion. Bronze or duplex stainless steel trims are also available upon request for the most aggressive environments.
Q4: Does the valve come with a handwheel or gear operator?
DN65–DN100 valves come with a standard handwheel. For DN125 and DN150, a gear operator is provided to reduce operating torque. The handwheel/gear is designed for modulating (throttling) service, not just fully open/closed.
Q5: What is the maximum working pressure at 300°C?
At elevated temperatures, the pressure rating decreases. For carbon steel (WCB) at 300°C, the maximum allowable working pressure is approximately 3.5 MPa (510 psi). For exact values at your operating temperature, please refer to our pressure-temperature chart.
Q6: Is the valve suitable for fuel oil with a viscosity of 380 cSt?
Yes, the straight globe pattern allows passage of viscous fluids. However, we recommend using a larger size or reduced pressure drop design for heavy fuel oils to avoid excessive resistance. Contact our sales team for a detailed sizing recommendation.
Q7: Do you provide third-party inspection or certification?
Yes, we can arrange inspection by classification societies such as Lloyd’s, DNV, BV, or ABS at additional cost. Our standard quality control includes material certificates and test reports.
Q8: What is the typical lead time for DN150 dual-function valves?
For standard materials (WCB), lead time is approximately 30–45 working days after confirmation of order and technical specifications. Rush orders may be possible with prior agreement.
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