0.2 m³ Marine Hot Water Tank

Our 0.2 m³ Marine Hot Water Tank (Model: ZDR-0.2) is a high-efficiency dual-heating system specifically designed to provide reliable and continuous hot water supply for crew use on ships, offshore platforms, and marine vessels. By utilizing both electric and steam heating options in a single integrated unit, this hot water tank ensures optimal performance and energy flexibility in demanding maritime environments.

Dual-Power Flexibility

The ZDR-0.2 combines two independent heating methods in one compact unit:

Steam Heating: Utilizes vessel steam at 0.3 MPa for efficient bulk heating when steam is available
Electric Heating: Provides backup or primary heating when steam is unavailable or during port stays
Operational Redundancy: If one heat source is offline, the other maintains hot water supply

Seamless System Integration

This hot water tank is designed to integrate seamlessly with your vessel’s existing freshwater pressure system, automatically drawing cold water and delivering heated water at stable temperatures up to 65°C. The complete packaged unit includes all necessary components for straightforward installation and immediate operation.

Globally Certified Quality

Fully certified by leading IACS (International Association of Classification Societies) members including:

BV (Bureau Veritas)
CCS (China Classification Society)
DNV (Det Norske Veritas)
ABS (American Bureau of Shipping)
LR (Lloyd’s Register)

These certifications guarantee compliance with international marine standards and ensure acceptance by flag states and insurers worldwide.

Key Features & Benefits

✅ Dual Heating Capability: Both electric and steam heating in one unit for operational flexibility and redundancy.
✅ IACS Certified: Approved by BV, CCS, DNV, ABS, LR and other major classification societies.
✅ Optimal 0.2 m³ Capacity: Ideal for medium-sized vessels with 10-20 crew members.
✅ 65°C Stable Output: Consistent hot water temperature for showers, washing, galley operations.
✅ Seamless System Integration: Designed to connect directly to existing freshwater pressure systems.
✅ Complete Packaged Unit: Includes all components shown in the parts list—ready for installation.
✅ Robust Marine Construction: Built to withstand vibration, humidity, and corrosive marine atmospheres.
✅ Energy Efficient: Automatic temperature control optimizes energy consumption.
✅ Comprehensive Safety Features: Multiple safety devices protect against overpressure and overheating.
✅ Superior Insulation: 40mm thermal layer with 0.7mm galvanized steel cladding minimizes heat loss.

Complete System Components

No.	Component Name	Quantity
1	Body	1
2	Thermometer	1
3	Manhole Cover	1
4	Temperature Controller Valve Interface	1
5	Manometer (Pressure Gauge)	1
6	Safety Valve	1
7	Electric Control Box	1
8	Liquidometer (Level Gauge)	1
9	Temperature Control Interface	1
10	Heater	1
11	Hot Water Heater Assembly	1
12	Stop Inverted Valve	1
13	Flanged Transition Joints	1
14	Top Valve	1
15	Marine Vortex Centrifugal Pump	1
16	Common Base	1
17	Pressure Controller	1

Technical Specifications

Model ZDR-0.2 (Primary Model)

Parameter	Specification
Model	ZDR-0.2 Marine Hot Water Tank
Capacity	0.2 m³
Working Pressure	0.6 MPa (at 60°C)
Design Pressure	0.7 MPa
Test Pressure	1.05 MPa
Safety Valve Open Pressure	0.63 MPa
Water Inlet Temperature	15°C
Water Outlet Temperature	65°C
Working Temperature Range	0~65°C
Design Temperature	80°C
Steam Pressure	0.3 MPa
Steam Heating Capacity	450 kg/h
Steam Consumption	45 kg/h
Insulation Thickness	40 mm
Outer Galvanized Steel Thickness	0.7 mm

Complete ZRG Series Specifications

Model	ZRG-0.12	ZRG-0.2	ZRG-0.3	ZRG-0.5	ZRG-1.0
Capacity (m³)	0.12	0.2	0.3	0.5	1.0
Working Pressure (MPa)	0.6 (60°C)	0.6 (60°C)	0.6 (60°C)	0.6 (60°C)	0.6 (60°C)
Design Pressure (MPa)	0.7	0.7	0.7	0.7	0.7
Test Pressure (MPa)	1.05	1.05	1.05	1.05	1.05
Safety Valve Open Pressure (MPa)	0.63	0.63	0.63	0.63	0.63
Water Inlet Temperature (°C)	15	15	15	15	15
Water Outlet Temperature (°C)	65	65	65	65	65
Working Temperature (°C)	0~65	0~65	0~65	0~65	0~65
Design Temperature (°C)	80	80	80	80	80
Steam Pressure (MPa)	0.3	0.3	0.3	0.3	0.3
Steam Heating Capacity (kg/h)	275	450	750	1200	3250
Steam Consumption (kg/h)	27.5	45	75	120	325
Insulation Thickness (mm)	40	40	40	40	40
Outer Galvanized Steel (mm)	0.7	0.7	0.7	0.7	0.7

Applications

The ZDR-0.2 Marine Hot Water Tank is ideal for providing domestic hot water on a wide range of vessels and offshore installations:

Vessel Types

Commercial Vessels: Cargo ships, container vessels, tankers, bulk carriers
Offshore Platforms: Oil rigs, FPSOs, accommodation barges
Passenger Vessels: Ferries, cruise ships
Workboats & Tugs: Towing vessels, construction support craft
Fishing Vessels: Commercial fishing boats with crew accommodations
Naval Vessels: Support ships, auxiliary vessels

Applications

Crew accommodations (showers, washing, sanitation)
Galley services (dishwashing, food preparation)
Laundry facilities
Deck operations (cleaning, maintenance)
Medical facilities (where fitted)

Frequently Asked Questions (FAQs)

Q1: What is the difference between the ZDR and ZRG series designations?
A: The series designation indicates the heating configuration:

ZDR Series: Dual-Power units combining both steam and electric heating capabilities in a single tank. Provides maximum operational flexibility and redundancy.
ZRG Series: Dedicated steam-only heating units, designed for vessels with reliable steam availability where electric backup is not required.
The ZDR-0.2 (our featured model) is from the Dual-Power series, offering both heating options.

Q2: How does the 0.2 m³ capacity translate to practical hot water availability?
A: A 0.2 m³ (200-liter) tank provides:

Storage Capacity: 200 liters of hot water stored at 65°C, ready for immediate use.
Heating Capacity: 450 kg/h (liters per hour) continuous heating rate—meaning the tank can deliver 450 liters of hot water per hour when accounting for recovery.
Typical Crew Size: Suitable for vessels with 10-20 crew members depending on usage patterns and peak demand.
For morning shower periods, the stored 200 liters handles initial demand while the 450 kg/h recovery rate maintains supply for subsequent users.

Q3: What does the 1.05 MPa test pressure certification guarantee?
A: The 1.05 MPa test pressure represents a hydrostatic pressure test significantly higher than the normal working pressure (0.6 MPa). This test is conducted during manufacturing to verify:

Structural Integrity: The tank can withstand pressures well above normal operating conditions without deformation or failure.
Weld Quality: All welded seams are proven leak-tight under extreme pressure.
Safety Margin: Provides assurance that the tank has a substantial safety factor (approximately 75% above working pressure).
Classification Compliance: Meets or exceeds the requirements of all major classification societies.
The test certification provides documented proof of the tank’s pressure integrity.

Q4: What maintenance does the ZDR-0.2 require?
A: Regular maintenance ensures optimal performance:

Monthly: Visual inspection for leaks, check pressure gauge reading, verify temperature controller operation.
Quarterly: Test safety valve operation (manual lift), inspect electrical connections for corrosion.
Annually: Drain and inspect tank interior for sediment, inspect heating elements for scale buildup, verify calibration of temperature controllers, test all safety devices.
Every 2-3 Years: Replace sacrificial anodes if fitted (depending on water chemistry).
Every 5 Years: Professional internal inspection and pressure testing during dry-docking (as required by classification society rules).
The modular design with accessible components simplifies all routine maintenance tasks.

Q5: Can the ZDR-0.2 be installed in vessels with different power systems?
A: Yes, the ZDR series is designed for global compatibility. While the electric heating specifications in this table focus on steam parameters, the dual-power ZDR units are available with electric heating elements configured for:

AC 380V / 50Hz / 3-phase (common in Asia, Europe, many international vessels)
AC 440V / 60Hz / 3-phase (common in American-built vessels and certain regions)
Other voltages available upon request
The control system is designed to accommodate both frequencies and voltages with appropriate component selection. Please specify your vessel’s electrical system when ordering.

Q6: What is the function of the marine vortex centrifugal pump in the system?
A: The included marine vortex centrifugal pump serves as the circulation pump for the hot water system. Its functions include:

Hot Water Circulation: Maintains hot water availability at distant fixtures by circulating water through a return line.
Pressure Maintenance: Helps maintain consistent system pressure.
Rapid Delivery: Ensures hot water reaches all outlets quickly without long waiting periods.
System Efficiency: Reduces water waste by minimizing the time users wait for hot water at taps.
The “vortex” design refers to the pump’s hydraulic characteristics, optimized for efficient circulation in marine piping systems.

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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