Hydrophore Tank. Pressure Vessel Water Tank. Expansion Tank. Bladder TankProducts/Hydrophore System
HYDROPHORE TANKS
PRESSURE VESSELS, EXPANSION VESSELS
& BLADDER TANK SOLUTIONS
MOWE Hydrophore Tanks, Pressure Vessels, Expansion Vessels, Bladder Tanks and Diaphragm Tanks are engineered for marine, offshore, domestic and industrial water applications.
Our tanks are manufactured in various materials, shapes, capacities and pressure ratings according to customer requirements and applicable international standards.
DESIGN
CONTROL
APPLICATION
STANDARDS
HYDROPHORE TANKS & PRESSURE VESSELS
Hydrophore Tanks, Expansion Tanks and Bladder Tanks are pressure vessels / pressure storage tanks designed to store fresh water or sea water.
These tanks operate in conjunction with Hydrophore Pumps, Programmable Logic Controllers (PLC), Human Machine Interfaces (HMI), integrated control functions and alarm systems to form a complete Hydrophore System.
CUSTOM ENGINEERING & SYSTEM INTEGRATION
MOWE Marine & Offshore specializes in the engineering, fabrication and integration of hydrophore tanks, pressure vessels, expansion vessels, bladder tanks and diaphragm tanks for marine, offshore and industrial applications.
Our systems are designed to provide reliable pressure control, water storage and expansion management while complying with applicable international engineering and marine standards.
- Custom Hydrophore Tank Design
- Pressure Vessel Fabrication
- Expansion & Bladder Tank Integration
- PLC / HMI System Integration
- Marine & Offshore Water Pressure Solutions
- ASME, PED and Marine Class Compliance
THERMAL EXPANSION
Expansion tanks are designed to handle the thermal expansion of water as it heats up in a water heater.
This helps prevent excessive water pressure which may damage valves, plumbing fixtures, supply pipe joints and water heaters.
STORAGE OF WATER
Hydrophore pressure tanks are vessels that hold water and air under pressure and supply water to the system in booster pump applications.
The stored water can supply users during a no-flow shutdown of the booster pump.
Depending on operating pressure, stored water can also serve applications at elevated locations.
PUMP WEAR PREVENTION
Pressure vessels help balance and maintain constant pressure in a water distribution system.
They serve as water storage and protect pumps from frequent switching and cycling, helping reduce rapid equipment wear.
Typical applications include deck wash, fire hydrant water, pressure jet wash and other pressurised water systems.
MAIN TANK DESIGNS
Hydrophore Tanks and Expansion Tanks are commonly manufactured in two main configurations.Vertical Closed Expansion Tanks
Vertical configurations are suitable for installations where floor space is limited and vertical equipment installation is preferred.
Horizontal Closed Expansion Tanks
Horizontal configurations are suitable for applications requiring low-height installation or specific equipment arrangement requirements.
VERTICAL & HORIZONTAL CONFIGURATIONS
EXPANSION TANK FEATURES
DESIGN VARIATIONS
Square tanks, Sphere tanks, Cylinder tanks, Elliptical Head (Ellipsoidal tanks) and Torispherical Heads tanks.
PRESSURE RATINGS
5 Bar, 10 Bar, 16 Bar, 20 Bar and other pressure ratings according to project requirements.
Various capacities including 1000L (1m³), 3000L (3m³), 5000L (5m³) and other custom sizes.
MATERIAL OPTIONS
Stainless Steel SS316, Bronze, Cement Coated, Glass Coated and Special Drinking Water Epoxy Coated materials.
BLADDER & PRESSURE TANK OPTIONS
PRESSURE TANK
AIR OVER WATER
This design consists of a pressure vessel with an air inlet port that allows compressed air to enter the vessel, typically from the top.
The compressed air provides pressure to the water stored inside the vessel.
DIAPHRAGM
PRESSURE TANK
A diaphragm, commonly manufactured from rubber materials such as EPDM or BUTYL, separates the water from the compressed air.
Air entering from the top allows the tank to be charged using an air compressor.
BLADDER
PRESSURE TANK
A rubber bladder inside the tank separates water from compressed air.
Bladder materials commonly include EPDM and BUTYL and different bladder vessel configurations are available.
BLADDER PRESSURE TANKS
HOW DO BLADDER PRESSURE TANKS WORK?
The operating principle is similar to a diaphragm tank. The pressure difference created by compressed air allows the storage and discharge of water.
One of the main differences between diaphragm tanks and bladder tanks is that the bladder can be replaced.
The bladder can be locked on a docking flange and replaced when required, making bladder tanks suitable for larger tank capacities.
BLADDER TANK ADVANTAGE
The bladder can be replaced without replacing the complete tank. This can provide an economical solution for large tank capacities such as 2000L, 3000L or 5000L.
MAIN FUNCTIONS
- Maintain the desired water pressure range in the distribution system.
- Minimize pump cycling and frequent pump starts and stops.
- Protect the system against water hammer.
BLADDER TANK CONSTRUCTION
BLADDER VESSEL TANK TYPE A
Air in Bladder
The air charge is contained within the bladder inside the tank. The air charge does not come into contact with the liquid and therefore cannot be absorbed by the pumped liquid.
The bladder is commonly manufactured from highly elastic rubber such as BUTYL and may be pre-charged during installation.
An anti-extrusion plate may be installed at the vessel outlet to prevent the bladder from being drawn into the main at low pressure.
BLADDER VESSEL TANK TYPE B
Water in Bladder
The air charge is contained within the tank whilst the liquid from the main flows into and out of the bladder.
The liquid does not come into contact with the tank walls or the air charge, helping minimise air losses due to absorption.
Suitable compatible materials are selected according to the pumped liquid and project requirements.
PRESSURE VESSEL CERTIFICATION
Pressure Vessel and Bladder Vessel Tanks may be manufactured from Carbon Steel, Low Temperature Carbon Steel or Stainless Steel 304 / 316.
Typical manufacturing standards include ASME Section VIII Division 1, ASME U Stamp and PD5500.
Manufacturing according to IBR or other local requirements can also be considered.
CE MARKING & PED
Equipment intended for use within the European Union may be CE marked where applicable and requested.
The Pressure Equipment Directive (PED) 2014/68/EU applies to the design, manufacture and conformity assessment of stationary pressure equipment.
PED applies to equipment with a maximum allowable pressure greater than 0.5 bar.
POTABLE WATER APPLICATIONS
Potable water systems require suitable materials and certifications to support safe drinking water applications.
MOWE can provide pressure tank and water system solutions according to applicable potable water requirements.
Certification requirements are selected according to project, location and customer specifications.
TECHNICAL SPECIFICATIONS & ENGINEERING STANDARDS
MOWE Pressure Vessels and Hydrophore Tanks are designed and manufactured in accordance with internationally recognised engineering standards and project requirements.
- ASME Section VIII Division 1
- PED 2014/68/EU
- EN 13445
- AD-2000
- NSF 61
- WRAS
- DNV
- ABS
- Lloyd's Register (LR)
- Bureau Veritas (BV)
DRINKING WATER / POTABLE WATER CERTIFICATIONS
- WRAS – BS 6920
- Italian Ministerial Order No. 174
- KTW / UBA
- DVGW – TZW
- DVGW – W270
- ACS
- KIWA CLASS III
- NSF 61
- ÖNORM B 5014-1
- PZH
HYDROPHORE TANK SOLUTIONS
Engineered for Marine, Offshore and Industrial Applications