Pressurisation Units for Heating & Chilled Water Systems
Tricel supplies standard and project-specific pressurisation solutions for commercial HVAC and building-services applications, including the Tricel PU45 H/L packaged unit and Grundfos PHT pressurisation units, alongside SpiroVent Superior vacuum degassers. Our pump team can help identify the right configuration based on system pressure, volume, fluid type and control requirements.
01
Pressurisation Unit Range
From compact wall-mounted units to floor-standing and skid-mounted systems, the right pressurisation unit depends on system size, pressure, fluid and installation requirements.
DIGITAL DOSING
Tricel PU45 H/L
Skid-Mounted Pressurisation Unit
FORMAT
Skid mounted
TOP-UP
Single pump from a break tank
SUITED TO
Sealed heating and chilled-water systems
The Tricel PU45 H/L is a packaged unit for sealed-system pressurisation. A single pump, break tank, pressure vessel, valves and high and low pressure switches are mounted on one skid for plant-room installation.
Grundfos PHT A Wall-Mounted
Compact Digital Pressurisation
FORMAT
Wall mounted, narrow (A-N) or deep (A-D)
TOP-UP
From an integral break tank
SUITED TO
Compact installations
Grundfos PHT A-N and PHT A-D are wall-mounted pressurisation units for sealed heating and cooling systems where space is limited. The controller monitors system pressure and tops up the system when pressure falls.
Grundfos PHT A Floor-Standing
Floor-Standing Pressurisation
FORMAT
Floor standing (A-F)
TOP-UP
From an integral break tank
SUITED TO
Medium-sized commercial systems
Grundfos PHT A-F is a floor-standing pressurisation unit for sealed heating and chilled-water systems. Fill pressure and pump configuration depend on the selected model.
Specialist PHT Configurations
Twin-System & Glycol Pressurisation
FORMAT
Floor standing (A-T, A-V)
TOP-UP
Two systems (A-T) or water and glycol (A-V)
SUITED TO
Twin-system and glycol duties
PHT A-T tops up two separate sealed systems from one unit. PHT A-V adds glycol from a dedicated tank at a set rate as it tops up, for systems running on a water/glycol mixture.
Project-Specific Pressurisation
Custom Pressurisation Units
Not every heating or chilled-water installation suits a standard unit. For project-specific requirements, Tricel designs pressurisation arrangements around the system duty, control requirements and installation constraints, with the pump, break tank, pressure vessel and valves configured on one skid where the project suits it.
02
Pressurisation Unit Applications
Sealed Heating Systems
Maintain the required pressure within closed commercial heating circuits.
Chilled Water Systems
Controlled top-up and pressure maintenance for sealed chilled-water circuits.
Commercial HVAC
Pressurisation for commercial heating and cooling installations.
Glycol Systems
Water/glycol top-up for suitable sealed systems, using a dedicated glycol unit.
Commercial Plant Rooms
Wall-mounted, floor-standing and skid-mounted units for building-services plant rooms.
System Upgrades & Replacement
Replacement of ageing pressurisation equipment within existing HVAC systems.
03
Vacuum Degassing for Heating & Chilled Water Systems
Maintaining the correct system pressure is only one part of protecting a sealed heating or cooling system. Air and dissolved gases in the circulating fluid can contribute to poor circulation, noise, corrosion and reduced system performance.
Tricel supplies SpiroVent Superior vacuum degassers, which remove free air, microbubbles and dissolved gases from closed heating, cooling and suitable process systems. A vacuum degasser does not maintain system pressure; it works alongside the pressurisation unit and expansion vessel.
Scope of work
- Complex pipework: many branches and low flow velocities
- Low temperature difference: heating or cooling systems with a small ΔT
- Dissolved gas problems: gases that conventional air vents cannot remove
- No effective inline position: where an inline air deaerator cannot be installed
SpiroVent Superior Range
SpiroVent Superior S250
Light-Commercial Vacuum Degassing
APPLICATION
Closed heating and cooling systems
SUITED TO
Smaller-volume systems
A compact automatic vacuum degasser for smaller closed heating and cooling systems, including newer systems that operate at lower temperatures.
SpiroVent Superior S400 & S600
Commercial HVAC Vacuum Degassing
APPLICATION
Closed heating, cooling and process systems
SUITED TO
Commercial systems
Automatic vacuum degassers for commercial sealed systems, available with break-tank or direct refill versions according to system requirements.
SpiroVent Superior S10 & S16
Higher-Pressure Vacuum Degassing
APPLICATION
Closed heating, cooling and process systems
SUITED TO
Higher-pressure systems
Automatic vacuum degassers for higher-pressure commercial heating, cooling and process systems, with direct refill versions available.
04
Choosing the Right Pressurisation Unit
The right unit depends on the sealed system, its operating conditions and the level of control required.
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Factor
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What we need to know
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System pressure
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What cold-fill and operating pressures are required?
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System volume
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What is the approximate volume of the sealed heating or cooling circuit?
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Fluid
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Does the system contain water or a water/glycol mixture?
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Top-up requirement
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What top-up pressure and capacity are required?
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Pump configuration
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Is a single-pump arrangement suitable, or is additional resilience required?
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Expansion equipment
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What expansion-vessel arrangement is used with the system?
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Controls & monitoring
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Are alarms, BMS signals or additional monitoring required?
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Installation space
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Is a wall-mounted, floor-standing or skid-mounted arrangement most suitable?
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05
Understanding the Pressurisation Range
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Solution
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Format
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Typically suited to
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|---|---|---|
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Tricel PU45 H/L
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Skid mounted
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Packaged sealed-system pressurisation
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PHT A-N / A-D
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Wall mounted
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Compact pressurisation installations
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PHT A-F
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Floor standing
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Medium-sized commercial sealed systems
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PHT A-T
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Floor standing
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Topping up two separate sealed systems
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PHT A-V
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Floor standing
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Water/glycol systems
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The PHT A controller provides alarm and status signals that can be connected to a building management system. Confirm the communication options for the selected model.
Pressurisation Units vs Pressure Boosting Sets
Pressurisation units
Pressure boosting sets
Increase water-supply pressure to outlets and services within a building.
Looking for water pressure boosting? Explore Pressure Boosting Sets→
06
From Selection to Commissioning
01
Assess
Review system pressure, volume, fluid and operating requirements, on site where needed.
02
Select
Identify the appropriate unit, pump configuration, controls and expansion arrangement.
03
Supply
Provide the selected standard or project-specific pressurisation system.
04
Commission & Support
Installation, commissioning and preventative maintenance where required.
frequently asked questions
What is the difference between a pressurisation unit and a vacuum degasser?
A pressurisation unit maintains the required pressure in a sealed system and tops it up when pressure falls. A vacuum degasser removes free air, microbubbles and dissolved gases from the system fluid. They do different jobs and can be used together.
What does a pressurisation unit do?
A pressurisation unit monitors pressure within a sealed heating or cooling system and automatically introduces make-up water when pressure falls below the required level. It works alongside the expansion vessel rather than replacing it.
Where are pressurisation units used?
Pressurisation units are commonly used with sealed heating, chilled-water and commercial HVAC systems.
Is a pressurisation unit the same as a booster pump?
No. A pressurisation unit maintains pressure in a closed heating or cooling circuit. A booster system increases water-supply pressure within a building.
What is the difference between a twin-pump and a twin-system unit?
A twin-pump unit has two pumps serving one system, giving additional capacity or resilience depending on the model. A twin-system unit, such as Grundfos PHT A-T, tops up two separate sealed systems from one unit.
Can a pressurisation unit be used with glycol?
Yes, where the unit is designed for it. Grundfos PHT A-V adds glycol from a dedicated tank as it tops up the system. A standard unit filling with water alone will gradually dilute the glycol mixture.
Pressurisation Units in Ireland
Tricel supplies pressurisation units in Ireland for sealed heating, chilled-water and commercial HVAC systems. Sealed system pressurisation keeps a closed circuit at its working pressure, so heating system pressurisation units and chilled water pressurisation are selected around the system rather than the building’s water supply.
Solutions include the Tricel PU45 H/L, the Grundfos PHT range of HVAC pressurisation units and custom commercial pressurisation units where a standard sealed heating system pressure unit does not meet the installation requirements. Our pump team can assess system pressure, volume, fluid type, control requirements and plant-room conditions, then install, commission and maintain the unit.
Pressurisation and degassing are separate functions. A SpiroVent Superior vacuum degasser removes free air, microbubbles and dissolved gases, which a pressurisation unit does not do, so it suits heating system degassing as well as chilled water vacuum degasser installations. When specifying a vacuum degasser in Ireland, our team can advise on HVAC vacuum degassing, dissolved air removal and wider commercial HVAC water treatment, and on where the degasser fits alongside the pressurisation and expansion arrangement.
For circulator and heating pumps, see HVAC and commercial heating systems. For project-specific packages, see bespoke pump systems, and for servicing, pump service and maintenance.
Need a Pressurisation Unit?
Tell our pump team about your system pressure, approximate system volume, heating or cooling application and fluid type, and we can help identify an appropriate solution.
Call +353 (0)64 668 8040 or email watersales@tricel.ie