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Help CenterHydraulic Actuated Wafer Valve for Ship Bilge and Firefighting Lines
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As a professional manufacturer of industrial valves with a strong export record, Shanghai Zhibang Valve Manufacture Co., Ltd. presents our high-performance Hydraulic Actuated Wafer Valve, engineered specifically for the demanding environments of ship bilge and firefighting lines. Built on our ISO9001-certified production expertise, this valve offers shipbuilders, shipyards, and marine service companies a reliable, space-saving, and efficient solution for critical fluid control. The integration of robust hydraulic actuation ensures dependable operation in emergency situations and routine bilge management, providing peace of mind for vessel safety and operational continuity. Our commitment to quality and understanding of global marine standards make this valve a trusted component for maritime applications worldwide.
This valve is designed to meet the rigorous demands of marine service, where reliability and compact design are paramount. The wafer-style body allows for installation between flanges without the need for additional nuts on the valve body itself, saving significant space and weight—a crucial advantage in ship design. The hydraulic actuator provides high torque output, ensuring positive sealing and operation even against high differential pressures or in the presence of debris common in bilge systems.
Key Features and Technical Advantages:
- Compact Wafer Design: Offers a lightweight and space-efficient profile compared to lug or flanged valves, ideal for the confined spaces of ship engine rooms and bilge systems.
- High-Torque Hydraulic Actuation: Delivers reliable, fail-safe operation. The actuator can be configured for spring-return (fail-close or fail-open) or double-acting operation, suitable for both routine and emergency shutdown functions in firefighting lines.
- Robust Construction for Marine Environment: Available in materials like Cast Iron with epoxy coating, Ductile Iron, or Stainless Steel (CF8/CF8M) to resist corrosion from saltwater, bilge fluids, and firefighting foam concentrates.
- Bubble-Tight Sealing: Features resilient seats (EPDM, NBR, or PTFE) that provide excellent sealing against water, seawater, and foam, minimizing leakage and ensuring system integrity.
- Versatile Pressure Ratings: Manufactured to standard pressure classes (PN10/16/25, Class 150/300) to suit various system design pressures onboard vessels.
- Easy Maintenance: The modular design often allows for in-line maintenance of seats and seals without removing the valve body from the pipeline, reducing downtime.
Typical Technical Specifications:
| Parameter | Specification / Option |
| Size Range | DN50 (2") to DN600 (24") |
| Body Material | Cast Iron (Coated), Ductile Iron, Stainless Steel 304/316, Duplex Steel |
| Disc Material | Stainless Steel, Cast Iron + Coating |
| Seat Material | EPDM (Standard), NBR, PTFE, FKM |
| Pressure Rating | PN10, PN16, PN25 / Class 150, Class 300 |
| Temperature Range | -10°C to +120°C (depending on seat material) |
| Actuator Type | Hydraulic (Double-Acting or Spring-Return) |
| Hydraulic Pressure | Standard: 70 bar (1000 psi). Customizable. |
| End Connection | Wafer, conforming to ISO, DIN, ANSI, JIS flange standards |
Benefits for Your Marine Operations:
- Enhanced Safety: Reliable automatic operation is critical for firefighting systems and bilge pump control, contributing directly to vessel and crew safety.
- Space and Weight Savings: The wafer design reduces the overall footprint and weight of the piping system, allowing for more flexible layout design and potentially lower fuel consumption.
- Reduced Operational Risk: Hydraulic actuation is less susceptible to electrical hazards, making it a suitable choice for potentially explosive or wet environments on ships.
- Long Service Life & Low Maintenance: Corrosion-resistant materials and robust construction ensure durability in harsh marine conditions, lowering total cost of ownership.
- System Integration Ready: The hydraulic actuator can be easily integrated into the ship's central hydraulic control system or a dedicated hydraulic power unit.
Shanghai Zhibang Valve, established in 2016, has grown into a trusted supplier with an annual export value ranging between US$1 Million and US$1.5 Million, serving diverse markets across North and South America, Europe, Asia, Africa, and Oceania. Our products are shipped globally from major ports like Shanghai, Guangzhou, Hong Kong, and Beijing. This global footprint is supported by our ISO9001 Quality Management System certification, which underpins every stage of our manufacturing process—from material sourcing and precision machining to assembly and testing. When you choose our Hydraulic Actuated Wafer Valve, you are not just purchasing a component; you are investing in a product backed by a manufacturer's commitment to consistent quality, reliable performance, and professional support. We invite shipowners, naval architects, and marine equipment distributors to contact us for detailed specifications, competitive quotations, and customized solutions to meet your specific project requirements. Let us be your partner in ensuring fluid system reliability at sea.
Frequently Asked Questions (FAQ):
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Q: What is the main advantage of a wafer-style valve over a flanged valve for ship applications?
A: The primary benefit is space and weight savings. Wafer valves install between two flanges using through-bolts, eliminating the valve's own flange hubs and nuts. This results in a shorter face-to-face length and lighter weight, which is highly advantageous in the compact engine rooms and bilge spaces of a ship. -
Q: Can this valve be used for both bilge water and seawater firefighting lines?
A: Yes, it is designed for both services. The key is selecting the appropriate body and seat materials. For example, a Stainless Steel 316 body with EPDM or PTFE seats is suitable for seawater, while coated cast iron may be sufficient for bilge water. We can advise on the best material combination for your specific media. -
Q: What type of hydraulic power unit is required to operate this valve?
A: The valve requires a standard marine hydraulic power unit capable of delivering the required pressure (typically around 70 bar) and flow rate for the actuator's cylinder size. The specific requirements will be provided in the valve's datasheet. The valve can be integrated into a ship's existing central hydraulic system or a dedicated local system. -
Q: Is a fail-safe (spring-return) function available?
A: Yes. The hydraulic actuator can be supplied in a spring-return configuration. In the event of hydraulic pressure loss, the springs will automatically drive the valve to a predefined safe position (either fully open or fully closed), which is critical for firefighting and safety systems. -
Q: What are the standard lead times for this product?
A: Lead times vary based on size, material, and order quantity. Standard configurations typically have shorter lead times. For large or customized orders, we provide a specific production schedule upon quotation. Our efficient logistics allow for shipment from multiple ports to meet project deadlines. -
Q: Do you provide documentation packages suitable for ship classification society approval?
A: We can provide a comprehensive material documentation package, including Material Certificates (3.1/3.2), test reports, and drawings. While we hold ISO9001, final approval for specific class rules (like ABS, DNV, LR, etc.) is typically granted by the surveyor based on the complete system installation. Our documentation is prepared to support this approval process. -
Q: How is the valve tested before shipment?
A: Each valve undergoes routine factory tests, which include a shell strength test (hydrostatic pressure test) and a seat leakage test (usually per API 598 or equivalent standards). Additional tests, such as a full functional test with the actuator, can be performed upon request. -
Q: Are customized options like different end flange standards or special coatings available?
A: Absolutely. We offer customization to meet specific project needs. This includes manufacturing valves to different flange standards (ANSI, JIS, etc.), applying special epoxy or rubber linings for enhanced corrosion protection, or providing actuators with specific control accessories (limit switches, solenoid valves, etc.).
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