The H-Line Pressure system incorporates the latest innovations in the field of pressurisation and expansion, resulting in offering significant advantages over traditional systems using diaphragm pressure vessels, not least the absence of expensive ongoing maintenance and inspection tests.
The H-Line Pressure Unit incorporates a motorised valve, soft-start pump and energy saving control functions. Its design minimises pressure variations by maintaining a precise and stable pressure at the lowest possible energy consumption. This eliminates system noise as well as ensuring maximum in-service component lifespan. The H-Line pressurisation unit and expansion vessel has been rigorously tested to demonstrate negligible oxygen diffusion levels comparative with sealed systems.
Ideal for district heating, district cooling, energy networks, commercial HVAC.
Use a small open tank with a HL Hydronics pressurization unit. Call SmartPressure, our team
are on hand 24/7 365 days a year.
Use a small open tank with a HL Hydronics pressurization unit. Call SmartPressure,
our team are on hand 24/7 365 days a year.
Call Smartpressure, our team are on hand 24/7 365 days a year. We have a large stock, bespoke
manufacturing capability with extremely short turn around times for delivery.
HL Hydronics Pressurisation units are very reliable, state of the art and highly efficient.
Expansion Tank Specifications
A wide range of open expansion tanks are available for use with H-Line dependent on system pressure, temperature and volume characteristics. Polyethylene (6mm and 10mm wall thickness) and coated steelheavy-duty options. Factory sizing verification included. Instead of using only 40% of the available expansionvolume (traditional diaphragm vessel design) H-Lineuses up to 90% of its tank capacity. This saves significant plant space and coupled to tank lightness and their narrow widths makes H-Line installation very easy and cost effective compared to fitting traditional diaphragm vessels.
A pressurization vessel (often called an expansion vessel or tank) acts as a shock absorber and volume regulator for a sealed fluid system.
It maintains a constant pressure level by taking advantage of the fact that air can be compressed, whereas water cannot.
Core Mechanism The vessel is a sealed tank divided into two separate chambers by a flexible rubber barrier, such as a diaphragm or bladder.
Air/Gas Chamber: One side is pre-charged with compressed air or nitrogen.
Water Chamber: The other side is connected directly to your system's pipework.
How It Operates System Heating (Expansion): As water in a system (like a boiler) heats up, its volume increases by roughly 4%. Since the water has nowhere to go in a sealed system, it flows into the water chamber of the vessel. The increasing water volume pushes against the flexible diaphragm, compressing the air in the gas chamber to absorb the extra pressure.
System Cooling (Contraction): When the water cools down and its volume shrinks, the compressed air in the gas chamber expands, pushing the water back out into the pipework. This prevents a vacuum from forming and maintains steady pressure.
Key Functions
Pressure Stabilization: It prevents "water hammer" (shockwaves from sudden valve closures) and keeps pressure within safe operating limits.
Pump Protection: By acting as a reservoir, it reduces how often pumps need to switch on and off (cycling), which extends the motor's lifespan.
Safety: It prevents the
Pressure Relief Valve (PRV) from constantly opening and discharging water when the system is hot.
