Marine Hydrophore Unit

ZYG(S) Series Marine Hydrophore Unit

The ZYG(S) Series Marine Hydrophore Unit is a meticulously engineered, indispensable pressure vessel system designed to guarantee the dependability of water supply networks onboard ships and offshore installations. These robust hydrophore tanks serve as the critical heart of a vessel’s water infrastructure, ensuring that fresh water, seawater, and other service water are delivered at a stable, consistent pressure to every point of use, from the galley and accommodation areas to the engine room and deck washing stations.

Constructed with corrosion-resistant materials and featuring CCS-B certified construction, these units are built to withstand the harsh marine environment while providing years of trouble-free operation. By utilizing compressed air technology to maintain a pressurized water reserve, the ZYG(S) system smooths out demand fluctuations, preventing pump short-cycling and ensuring a steady flow to all onboard personnel and systems.

Key Applications & Uses

The ZYG(S) Marine Hydrophore Unit is the versatile solution for a wide array of shipboard water systems:

• ✔ Marine Fresh Water Supply Systems: Ensures the efficient and hygienic distribution of potable water to crew and passengers.

• ✔ Shipboard Seawater Washing Systems: Supplies pressurized seawater for deck washing, fire scrubbing, and general sanitation.

• ✔ Marine Plumbing Infrastructure: Maintains consistent pressure across the entire ship, ensuring smooth flow in taps, showers, and fixtures.

• ✔ Vessel Hotel Services: Provides reliable water supply for accommodation areas and galleys, supporting bathing, cooking, and cleaning.

• ✔ Marine Engineering Systems: Offers an auxiliary water supply for engine room operations, including cooling and component washing.

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Main Components & Materials

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Operating Principle: Compressed Air Technology for Stable Pressure

The ZYG(S) system maintains constant water pressure through the application of compressed air technology.

1. Pressurization: The vortex pump delivers water into the sealed tank, compressing the air trapped above the water. This compressed air acts as a cushion or energy reservoir.

2. Automatic Cycling: The automatic pressure controller monitors system pressure.

   • Start: When pressure drops to 0.3 MPa (due to water usage), the controller activates the pump.

   • Stop: When pressure reaches 0.4 MPa, the controller deactivates the pump.

3. Safety Systems: Multiple safety features ensure reliable performance:

   • Liquid Level Gauge: Clear visual indication of water levels.

   • Pressure Gauge: Continuous real-time pressure monitoring.

   • Safety Valve: Automatically relieves pressure exceeding 0.42 MPa, preventing system damage.

   • Dual Control Modes: Allows selection of manual or automatic operation.

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Technical Specifications & Dimensions

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Maintenance & Service Guidelines

To ensure long-term reliability and optimal performance, follow these maintenance guidelines:

Regular Inspection Checklist

• Check Connections: Thoroughly inspect all pipeline connectors and valves for tightness to prevent air intrusion, which can affect pressure stability.

• Verify Charge Valve: Ensure the charge valve is sealing properly to maintain the correct air cushion.

• Monitor Pressure: Regularly check system pressure. If it remains consistently low, add compressed air to restore the correct pre-charge.

• Inspect Controller: Verify the pressure controller settings and pump activation parameters are correctly configured.

Periodic Maintenance

• Tank Cleaning: Conduct regular tank cleaning and interior inspection to remove sediment and debris.

• Coating Maintenance: Repaint the interior and maintain the exterior anti-corrosive coating based on condition assessments to prevent rust.

• Component Replacement: Replace wear parts (seals, valves) during scheduled dry docking.

• Pump Service: Maintain the pump per manufacturer’s specifications, including lubrication and replacement of worn components.

Safety Considerations

• Depressurize: Always depressurize the system completely before performing any maintenance.

• Lockout/Tagout: Follow strict lockout/tagout procedures to prevent accidental activation.

• Personal Protective Equipment (PPE): Use appropriate PPE, including gloves and safety glasses.

• Ventilation: Ensure proper ventilation during interior tank maintenance to prevent accumulation of harmful gases.

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Frequently Asked Questions (FAQs)

Q1: What is a “Hydrophore Unit” and why is it needed on a ship?
A: A Hydrophore Unit (or pressure tank system) is essential for any vessel’s water supply because shipboard pumps cannot run continuously. The unit uses a pressurized tank filled with water and compressed air. When a tap is opened, the compressed air pushes water out, providing flow without the pump running. When pressure drops to a set point (e.g., 0.3 MPa), the pump runs briefly to refill the tank and re-pressurize the air. This system ensures stable, constant water pressure and protects the pump from rapid cycling.

Q2: What does “CCS-B Certified” mean for the tank construction?
A: CCS stands for China Classification Society, one of the world’s leading marine classification societies. “CCS-B Certified” means the marine-grade steel used for the tank and the welding procedures have been surveyed and approved by CCS surveyors, confirming they meet the strict international standards for strength, quality, and safety required for marine pressure vessels. This certification is often mandatory for vessel registration and insurance.

Q3: What is the difference between the ZYG and ZYG(S) models?
A: The “(S)” in the model designation typically indicates a variation in the tank configuration or mounting arrangement. Both series share the same robust construction and operating principles. The specific differences may relate to the orientation of connections or the type of mounting base. Please consult our detailed dimensional drawings or contact our sales team to select the exact model for your engine room layout.

Q4: How do I know which size model (0.2 to 0.6) I need for my vessel?
A: The required model size depends on your vessel’s water demand (number of crew, type of facilities) and the pump flow rate. The model number (e.g., ZYG-0.4) typically relates to the tank’s water volume or its overall capacity. For example, a larger vessel with more accommodation will require a larger tank (like the ZYG-0.6) to meet peak demand without causing the pump to start too frequently. Our engineers can help you calculate the correct size based on your specific vessel specifications.

Q5: What maintenance does the air cushion require?
A: The air cushion is critical for proper operation. Over time, air can be absorbed into the water, reducing the cushion volume. You should periodically check the system pressure when the tank is empty of water (pump off). If the pre-charge pressure is low, you must add compressed air via the charge valve. Typically, the pre-charge pressure should be set just below the pump cut-in pressure (e.g., ~0.28 MPa for a 0.3 MPa cut-in).

Q6: Can this unit be used for both fresh water and seawater systems?
A: Yes. The ZYG(S) series is designed for versatility. It is suitable for both fresh water (potable) and seawater systems. The use of CCS-B certified steel, combined with corrosion-resistant components like the SS 316L ball valve and proper internal/external coating, ensures the tank can handle the corrosive nature of seawater without degradation. If used for potable water, the internal coatings are food-grade safe.

Attention please: The description was copied from different cooperating manufacturers. The description may be different with the goods, please check with us when order.

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