Optimal performance! The common goal of engineers, controls contractors, building owners and operators when designing, installing and commissioning HVAC systems. And that means two things: Consistent comfort for tenants and users at every building location Energy efficiency for reduced consumption and costs   Hydronic engineering is the foundation for optimal HVAC system performance. Here’s

What Does It Mean? 2-32 psi means that as long as the difference in pressure between the two ports on the valve is greater than 2 psi and less than 32 psi, the flow will be within 5% of the rated flow. It’s important to note that it’s the difference that matters: if the red

Motivation For years, IMI-Flow Design has provided valves with end connections customized for the job at hand.  When field disconnection is desired this means our carefully designed o-ring unions with their superior o-ring retention, but on system connections for an isolation valve a more permanent and tamper-proof system is required. The dual seal end-piece design is a permanent

What? Many products from IMI-Flow Design have an integrated ball valve for isolating the terminal.  Under the handle of these ball valves there’s a nut.  This is called the “packing nut”.   Concealed under the packing nut is… wait for it… packing.  Specifically, there’s a piece of PTFE which is squeezed by the nut to

Class I These are the simplest flow controllers mechanically.  The differential pressure across the device acts on an area, which tends to move a piston.  This force is opposed by a force which varies with position (normally a spring).  The force due to pressure and the spring force determine the position of the piston.  The

IMI Flow Design sells manual balancing valves based on a fixed venturi element.  This brings up certain questions, of course. What’s a Venturi? A venturi, at least in this context, is a device which converts pressure to kinetic energy, then converts it back. To put it simply, it gets narrow, then widens out gradually so

The question comes up regularly: does Autoflow™ interfere with the operation of a modulating control valve? After all, as the control valve closes, the Autoflow will be opening. In short, of course it will make a difference, but it will not be worse than without the Autoflow™. Saturation The rate of heat flux from the

Picture yourself on a soggy dirt road. For some reason you’ve stopped and want to get going again. Unfortunately, when you press the gas, one wheel spins. Pressing the gas more just makes it spin more and the car goes nowhere. Then you suddenly remember your car has traction control and activate it. The system