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Help CenterZhibang Valve GB/T Electric Marine Gate Valve With Rising Stem for 220V/380V Systems
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As a specialized manufacturer with a focus on industrial and marine fluid control solutions, Shanghai Zhibang Valve Manufacture Co., Ltd. is proud to introduce our GB/T compliant Electric Marine Gate Valve with Rising Stem. Engineered for demanding marine environments, this valve combines reliable mechanical design with convenient electric actuation, offering a robust solution for on/off and isolation duties in ship piping systems. Our commitment since 2016 has been to deliver valves that meet stringent performance criteria, backed by our ISO9001 certified manufacturing processes, ensuring consistent quality for shipbuilders, shipyards, and marine system integrators worldwide.
The core value of this valve lies in its electric automation, which eliminates the need for manual operation in hard-to-reach or large-scale installations, enhancing operational safety and efficiency. Designed specifically for 220V and 380V AC power systems commonly found on vessels, it provides a seamless integration point for modern, automated shipboard control networks.
Product Features & Technical Advantages
- Rising Stem Design: Provides clear visual indication of the valve position (open or closed), a critical safety feature in marine applications.
- Electric Actuator Integration: The actuator is designed for marine duty, with features like moisture protection and corrosion resistance to withstand harsh sea environments.
- Dual Voltage Compatibility: Configured to operate on standard 220V AC single-phase or 380V AC three-phase shipboard power, offering flexibility for different vessel electrical systems.
- Robust Construction: The valve body, bonnet, and stem are manufactured from materials selected for seawater corrosion resistance, such as cast steel with appropriate coatings or stainless steel grades.
- GB/T Standard Compliance: Manufactured according to Chinese National Standards (GB/T), which are widely recognized and accepted in international marine and industrial projects, particularly in Asian markets.
- Bi-directional Sealing: Capable of sealing effectively against pressure from either flow direction, simplifying installation and system design.
- Optional Seating: Available with metal-to-metal seats for high-temperature applications or resilient seats (like EPDM) for tighter shut-off in lower temperature services.
The electric actuator is a key component, typically offering:
- Local push-button control and remote signal capability (open/close/stop).
- Built-in torque and limit switches to prevent actuator overload and indicate end positions.
- Manual override feature, allowing manual operation in case of power failure—an essential fail-safe for marine safety.
- Enclosure protection rating suitable for marine environments (e.g., IP67 or higher is common).
Typical Technical Specifications
| Parameter | Specification / Option |
| Valve Type | Gate Valve, Electric Motor Operated |
| Size Range (Nominal Diameter) | DN50 to DN400 (2" to 16") |
| Pressure Rating (PN) | PN10, PN16, PN25 (Customizable) |
| Power Supply | 220V AC, 1Ph, 50/60Hz or 380V AC, 3Ph, 50/60Hz |
| Operating Time | Varies by size (e.g., 30-120 seconds for full travel) |
| Body Material Options | WCB (Cast Carbon Steel), CF8/CF8M (Stainless Steel), Ductile Iron |
| Stem Material | Stainless Steel (410, 304, 316) |
| End Connection | Flanged (RF, FF), according to GB, ANSI, JIS, DIN standards |
| Seat & Disc Material | 13% Cr Stainless Steel, Stainless Steel + Stellite, or with Resilient Insert |
| Actuator Protection | IP67 or higher, optional marine-grade coatings |
Benefits for Your Marine Projects
- Enhanced Operational Efficiency: Remote operation reduces manpower requirements and time for valve cycling in large engine rooms or tank areas.
- Improved Safety: Eliminates the need for personnel to operate valves in potentially hazardous or inaccessible locations onboard.
- System Integration Ready: The electric actuator can interface with the ship's central control system (DCS/PLC) for automated sequencing and monitoring.
- Reduced Lifecycle Cost: Durable construction and corrosion-resistant materials minimize maintenance needs and extend service intervals in saltwater environments.
- Compliance & Compatibility: Meeting GB/T standards ensures compatibility with other piping components and satisfies specifications for many international and domestic shipbuilding projects.
Frequently Asked Questions (FAQ)
Q1: What is the main difference between this electric marine gate valve and a standard manual gate valve?
A: The primary difference is the method of operation. This valve uses an integrated electric motor actuator for remote or automatic open/close control, whereas a manual valve requires direct hand-wheel operation on-site. This is crucial for valves installed in remote, elevated, or numerous locations on a ship.
Q2: Can this valve be used with other voltages, like 110V or 440V?
A: The standard models are designed for 220V and 380V AC. However, actuators for other common voltages (110V AC, 440V AC, 24V DC) can often be supplied as a customization. Please specify your required voltage during inquiry.
Q3: Does the "Rising Stem" feature cause any installation space issues?
A: The rising stem requires adequate vertical clearance above the valve for the stem to extend fully when opening. This is a standard consideration in marine design. Non-rising stem (NRS) designs are available as an alternative if vertical space is severely constrained.
Q4: What fluids is this valve suitable for in marine applications?
A: It is designed for a wide range of shipboard services including seawater, ballast water, fuel oil (diesel), lubricating oil, cooling water, and compressed air. The specific material selection (body, seat, seal) should be matched to the fluid media, temperature, and pressure.
Q5: Are spare parts and actuator maintenance kits available?
A: Yes. We provide comprehensive after-sales support, including availability of critical spare parts like gland packing, seals, gaskets, and even complete actuator maintenance kits to ensure long-term operational reliability.
Q6: How is the valve tested before shipment?
A: Each valve undergoes routine factory tests which typically include shell pressure tests (hydrostatic) and seat leakage tests as per GB/T or other applicable standards. Actuator function tests (torque, limit switches, manual override) are also performed. Detailed test certificates can be provided upon request.
Q7: Can you provide valves with different flange standards, like ANSI or JIS?
A: Absolutely. While compliant with GB/T dimensions, we regularly manufacture valves with flanges machined to ANSI, JIS, DIN, BS, and other international standards to suit global project requirements. Please specify your flange standard and facing (RF, FF, RTJ).
Q8: What is the typical lead time for an order?
A: Lead time depends on valve size, material, and quantity. For standard configurations in common sizes, lead time can be 4-6 weeks. We maintain an inventory of some common items for faster delivery. A precise schedule will be confirmed with your formal order.
Shanghai Zhibang Valve has established a strong track record since 2016, with our products successfully exported to diverse markets across North America, South America, Europe, Asia, Africa, and Oceania, achieving an annual export value in the range of US$1-1.5 Million. This global acceptance is a testament to the reliability and suitability of our valves for international marine standards. Our ISO9001 certification underpins every stage of production, from material sourcing to final testing. Supported by multiple major ports of shipment (Shanghai, Guangzhou, Hong Kong, Beijing), we ensure efficient and flexible logistics to meet your project timelines. Choose Zhibang for a marine gate valve solution that delivers dependable performance, simplifies operations, and stands up to the challenges of the marine environment.
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