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Help CenterCCS DNV Approved Marine Non-Rising Stem Gate Valve With 2-Year Warranty
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As a specialized manufacturer with a strong presence in global markets from North America to Southeast Asia, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to offer our CCS DNV Approved Marine Non-Rising Stem Gate Valve. Engineered for reliability in the demanding marine environment, this valve represents our commitment to quality, certified under ISO9001 standards. Designed for shipboard piping systems, ballast control, and offshore applications, it provides secure shut-off with a compact design ideal for space-constrained installations. With an annual export value reflecting our international trust, we ensure every valve meets rigorous performance criteria.
The core value of this valve lies in its approved design for marine safety and its maintenance-friendly non-rising stem operation. Unlike rising stem valves, the handwheel and stem nut rotate without vertical movement, making it suitable for areas with limited overhead clearance. This feature, combined with DNV certification, ensures compliance with stringent maritime classification rules, giving shipbuilders and operators confidence in system integrity.
Key Features & Technical Advantages:
- DNV Type Approval: Manufactured and tested according to Det Norske Veritas standards, ensuring acceptance for marine and offshore projects worldwide.
- Non-Rising Stem Design: The stem threads are inside the valve body. The handwheel rotates, but the stem does not move axially, saving vertical space and protecting the stem from external damage.
- Robust Construction: Available in materials like bronze for seawater service, cast steel for high-pressure lines, and stainless steel for corrosive media.
- Bubble-Tight Shut-Off: Precision-machined wedge or parallel slide gate ensures reliable sealing against pressures from vacuum to high-pressure ratings.
- Extended Service Life: Stem packing and sealing surfaces are designed for minimal wear, reducing maintenance frequency and total cost of ownership.
- Versatile End Connections: Configurations include flanged (ANSI/ISO standards), screwed (NPT, BSP), or butt-weld ends to suit various piping layouts.
Detailed Technical Specifications:
| Product Model | ZBG Series (Specific model available upon request) |
| Size Range | DN15 (1/2") to DN600 (24") |
| Pressure Class | Class 150, Class 300, Class 600 (ANSI) / PN10 to PN100 |
| Operating Temperature | Standard: -20°C to +200°C. Low-temperature and high-temperature versions customizable. |
| Seat & Seal Material | PTFE, Reinforced PTFE, Metal Seated (for high-temp) |
| Stem Material | Stainless Steel (A182 F6/F304/F316) or Bronze |
| Actuation | Manual handwheel (standard). Gearbox, electric, or pneumatic actuators optional. |
| Face-to-Face | Manufactured per API 600, API 6D, or customer specifications. |
Benefits for Your Operations:
- Project Compliance: The DNV approval facilitates smoother classification society reviews, speeding up ship delivery and commissioning.
- Space Optimization: The non-rising stem is ideal for double-bottom tanks, machinery spaces, and other areas with limited headroom.
- Reduced Maintenance: Enclosed stem design minimizes exposure to corrosive seawater and atmospheric conditions, lowering corrosion risk.
- Operational Safety: Provides a reliable isolation point for maintenance or emergency shutdowns in firefighting, ballast, bilge, and cooling systems.
- Global Supply Support: With major shipment ports in Shanghai, Guangzhou, Hong Kong, and Beijing, we ensure timely delivery to your project sites worldwide.
Backed by our 2-Year Warranty, this valve reflects the confidence we have in its durability and performance. Since our establishment in 2016, Shanghai Zhibang has built a reputation for supplying reliable flow control solutions, exporting to over a dozen major markets across the globe. Our ISO9001 certification underpins a consistent manufacturing process. Choosing our CCS DNV Approved Marine Gate Valve means selecting a component that enhances system reliability, meets international standards, and is supported by a manufacturer with proven export capability. Contact us today for a quotation or to discuss your specific valve requirements.
Frequently Asked Questions (FAQ)
Q1: What does "DNV Approved" mean for this valve?
A: DNV (Det Norske Veritas) is a leading international maritime classification society. "DNV Approved" indicates that the valve's design, manufacturing process, and testing have been reviewed and certified by DNV. This is often a mandatory requirement for valves used on ships and offshore platforms classed by DNV, ensuring they meet specific safety and performance standards.
Q2: What are the main advantages of a non-rising stem design over a rising stem design?
A: The primary advantage is the saved vertical space, as the handwheel rotates in place without the stem moving upwards. This makes it perfect for tight spaces. Additionally, the stem threads are protected inside the valve body from external corrosion and physical damage, which can enhance longevity in harsh marine environments.
Q3: For which specific marine applications is this valve most suitable?
A: This valve is commonly used in seawater cooling systems, ballast water systems, firefighting lines, bilge systems, tank vent lines, and general service pipelines on vessels and offshore installations where reliable isolation is required.
Q4: What materials are typically offered for the valve body, and how do I choose?
A: Common body materials include Bronze (excellent for seawater corrosion resistance), Cast Steel (for higher strength and pressure), and Stainless Steel (for highly corrosive or sanitary media). The choice depends on the fluid media, pressure, temperature, and specific classification society rules for your project.
Q5: Does the 2-year warranty cover all potential failures?
A: Our standard 2-year warranty covers defects in material and workmanship under normal service conditions as specified in our documentation. It typically does not cover damage due to improper installation, misuse, operation outside specified parameters, or lack of maintenance. Full warranty terms are provided with the product.
Q6: Can this valve be supplied with actuators for remote operation?
A: Yes. While supplied as a manual valve with a handwheel as standard, it can be configured to accept electric, pneumatic, or hydraulic actuators, as well as gear operators for high-torque applications. Actuator selection depends on the required operating speed, available power source, and control system integration.
Q7: What documentation is provided with the valve?
A: Standard documentation includes a Material Test Certificate (MTC), Certificate of Conformity, DNV Type Approval Certificate (if applicable for the ordered model), pressure test reports, and installation/maintenance manuals. Additional certificates can be provided upon request.
Q8: What is your typical lead time for an order?
A: Lead time varies based on order quantity, valve size, material, and configuration. For standard DNV-approved models in common sizes and materials, production lead time typically ranges from 4 to 8 weeks. We recommend contacting our sales team with your specific requirements for an accurate schedule.
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