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Help CenterMarine Straight Globe Check Valve Full Bore DN125 PN2.5MPa Flanged Connection Manual Actuator
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As a specialized manufacturer from Shanghai Zhibang Valve Manufacture Co.,ltd, we bring over a decade of expertise in producing high-performance industrial valves. Our Marine Straight Globe Check Valve Full Bore DN125 PN2.5MPa Flanged Connection Manual Actuator is engineered to deliver reliable backflow prevention and flow control in demanding marine environments. Built with ISO9001 quality management systems since 2016, this valve combines the robust features of a globe check valve with a manual actuator, giving operators direct control when needed. It is designed to withstand seawater corrosion, high pressure, and continuous operation, making it an ideal choice for ballast water systems, cooling water lines, and other shipboard applications.
Our commitment to excellence is reflected in every valve we produce. With an annual export value of US$1 Million – US$1.5 Million and a global footprint spanning North America, South America, Europe, Southeast Asia, and the Middle East, we ensure that each unit meets international standards. The full bore design minimizes pressure drop and allows pigging or cleaning operations, while the manual actuator provides a failsafe override for emergency shut-off. Below we detail the key features, technical specifications, and benefits of this product.
Key Features & Technical Specifications
- Full Bore Design – The internal diameter matches the pipe nominal bore, reducing fluid resistance and allowing easy passage of cleaning pigs or inspection tools. This is critical for marine systems where maintenance accessibility is limited.
- Straight Globe Pattern – Unlike traditional swing check valves, the straight globe configuration provides a more compact footprint and better flow characteristics. The disc moves linearly along the flow axis, ensuring quick response to reverse flow.
- Flanged Connection (PN2.5MPa) – Standardized flange dimensions per GB/T 9113 or ASME B16.5 (upon request) ensure leak-tight installation. Pressure rating of PN2.5MPa (25 bar) is suitable for medium-pressure marine pipelines.
- Manual Handwheel Actuator – The integrated manual actuator allows the valve to be manually opened or closed independently of the automatic check function. In emergency situations, operators can lock the valve in the closed position to isolate a system.
- Corrosion-Resistant Materials – Body and internals available in ductile iron with epoxy coating, bronze, or stainless steel (CF8M) for seawater resistance. Seat seals made of NBR, EPDM, or PTFE to suit different media temperatures and chemical exposure.
- Bi-Directional Sealing – The valve's sealing design achieves zero leakage in both directions when the manual actuator is engaged, providing double protection against backflow.
- Easy Maintenance – The top-entry bonnet design allows quick access to internal parts without removing the valve from the pipeline. Seats and discs are replaceable, extending service life.
Product Specifications Table
| Parameter | Value |
|---|---|
| Nominal Diameter | DN125 (5 inches) |
| Pressure Rating | PN2.5MPa (25 bar / 362.6 psi) |
| Connection Type | Flanged (RF/FF, GB/T 9113, DIN, ANSI optional) |
| Actuator | Manual Handwheel (hand-operated) |
| Body Material | Ductile Iron (QT400-18) / Bronze (C95800) / Stainless Steel (CF8M) |
| Seal Material | NBR (-10°C to +80°C) / EPDM (-20°C to +120°C) / PTFE (-20°C to +200°C) |
| Temperature Range | -20°C to +200°C (depending on seal) |
| Application | Marine ballast, cooling, fire-fighting, bilge, cargo handling |
| Standards | ISO9001:2015 certified; design per GB/T 12233/12236 (or API 6D on request) |
Benefits for Your Marine Systems
- Reduced Downtime – Full bore allows pigging and cleaning without disassembly, saving weeks of maintenance time during drydocking.
- Operational Flexibility – Manual override lets crew close the valve manually even if the automatic mechanism fails. This is invaluable during emergency scenarios or when isolating a line for repair.
- Corrosion Resistance – With appropriate material selection (e.g., bronze for seawater), the valve resists galvanic corrosion and pitting, achieving a service life of over 10 years in typical marine conditions.
- Space Saving – Compared to a separate globe valve plus check valve assembly, this integrated unit occupies less space and requires fewer flanged connections, reducing installation complexity and potential leak points.
- Low Pressure Drop – The straight-through flow path and full bore ensure minimal energy loss, which is critical for pumps running at fixed speeds.
- Cost Efficiency – By combining two functions into one valve body, you save on procurement, installation, and spare parts inventory.
Trusted by Global Marine Operators
Shanghai Zhibang Valve Manufacture Co.,ltd has been a reliable partner for marine and industrial valve solutions since 2016. Our dedication to quality is validated by ISO9001 certification, and our products are shipped to over 20 countries including key markets in North America, Europe, Southeast Asia, and the Middle East. With an annual export value exceeding US$1 million, we have proven our ability to fulfill large-scale orders with consistent delivery schedules. All valves are tested at our factory to ensure zero leakage at 1.5x rated pressure before shipment. We offer customized material options, special coatings, and third-party inspection (e.g., BV, DNV, ABS) upon request. When you choose our Marine Straight Globe Check Valve DN125 PN2.5MPa, you are investing in a product that combines durability, safety, and cost-effectiveness. Contact our sales team today to discuss your specific requirements or request a quotation. With our warehouse in Shanghai and flexible shipping via Shanghai, Guangzhou, Hongkong, or Beijing, we can quickly respond to your needs.
Frequently Asked Questions
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Q: Does this valve function as both a check valve and a manual shut-off valve?
A: Yes. The manual actuator allows you to override the automatic check mechanism. When the handwheel is turned clockwise, the disc is forced onto the seat, providing a positive shut-off in both directions. When the handwheel is fully open, the valve acts as a standard check valve, allowing flow in one direction only. -
Q: What is the maximum operating temperature for seawater service?
A: For seawater, we recommend a NBR or EPDM seat, with a maximum temperature of 80°C (NBR) or 120°C (EPDM). If higher temperatures or aggressive chemicals are present, PTFE seats can handle up to 200°C. Please specify your media when ordering. -
Q: Can this valve be installed vertically?
A: Yes, the straight globe check valve design is suitable for both horizontal and vertical pipelines with upward flow. For vertical down-flow installations, a spring-assisted disc option is available upon request to ensure proper closing. -
Q: What flange standards are available?
A: Standard flanges are machined to GB/T 9113 (PN2.5MPa). We also offer DIN PN25, ANSI 300, and JIS 10K/20K as options. Please confirm your flange standard at the time of ordering. -
Q: Is the manual actuator lockable?
A: Yes, the handwheel can be fitted with a locking device (padlock or chain lock) to prevent unauthorized operation. This is especially important for safety-critical systems. Please request locking capability when placing the order. -
Q: Do you provide third-party certification like DNV or ABS?
A: Absolutely. We can arrange for third-party inspection and certification by classification societies such as DNV, ABS, BV, or Lloyds at an additional cost. This ensures the valve meets marine class requirements. -
Q: What is the typical lead time?
A: For standard materials like ductile iron with NBR seal and manual handwheel, the lead time is 10–15 working days for small quantities. Custom materials or special coatings may require 20–30 days. We ship from Shanghai, Guangzhou, Hongkong, or Beijing. -
Q: Can I get a sample before bulk order?
A: Yes, we accept sample orders for evaluation. The sample price will be at a reasonable cost, and we can refund part of it if you place a bulk order later. Please contact our sales representative for details.
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