Skip to content

CIBSE WA: Hydronic System Control using Pressure Independent Control Valves

11 June 2019 17:45 - 19:00

The Public House
Shop 2, 263 Adelaide Terrace
Western Australia


CPD Hours

CIBSE Western Australia Chapter: Hydronic System Control using Pressure Independent Control Valves


Andrew Crabtree will first draw on his many years of experience in design, commissioning and building tuning to review the underlying principles of flow control and energy optimisation in HVAC systems, balancing the often conflicting components of psychrometrics, fan energy, pump energy and chiller energy inputs. He will also describe the "Trim & Respond" control strategy for static pressure control in VAV systems and differential pressure control in hydronic systems.

Andy Brooks will then describe what Pressure-Independent (PI) control valves are, how they work, how to use them and where to instal them. He will go on to explain the benefits of PI control valves in relation to system control, commissioning procedures and energy efficiency optimisation.

There will be plenty of time for questions and discussion after the 2 presentations and an opportunity for networking and discussion over a drink until the close at 7.00 pm.


Andrew Crabtree is a Director of Crabtree Engineering Software and is the current CIBSE WA Chapter Chair. He obtained a Master of Arts in Mechanical Sciences from Cambridge University and has spent his entire career in various aspects of the Building Services industry, now specialising in analytics and diagnostics software.

Andrew Brooks is a Regional Application Consultant for Belimo Actuators Ltd. He studied Business Information Systems in the UK and after working in IT he got drawn into the HVAC industry for his networking and programming knowledge. He has over 15 years' experience for various companies involved in the manufacture and design and control of HVAC systems. He has extensive experience on and off site, with a multitude of technologies.