New Commissioning Valve Range Launched by Armstrong

The new ARMflo DZR commissioning valves are precision engineered with fixed orifices to provide superior accuracy and facilitate fast setting. This design provides +/- 5% accuracy (or better) from ½ turn to 5 full turns, as compared to variable orifice valves that can only achieve this level of accuracy when wide open. This provides the precise hydronic fluid flow measurement and regulation required for accurate balancing of HVAC heating and chiller systems for optimum comfort of the building occupants and maximum energy efficiency.

The ARMflo DN15 to DN50 valves enable convenient ‘line-size’ selection for applications engineered to BSRIA standards with flow velocities of 0.7 to 1.3 metres per second. ‘Low flow’ DN15 and DN20 models are ideally suited for applications below 0.7 metres per second.

All commissioning valves in the range are manufactured with special brass alloys and heat treatment processes which resist dezincification for longer life in even the most aggressive water conditions. Their Wye pattern, globe-style valve design reduces turbulence and the 5-turn micrometer-style handle enables precise flowrate adjustment. A hidden memory stop feature saves setting after use for shut-off to service the system in which they are installed.

The new valves are supported by a range of Armstrong balancing accessories including the compact DPM-100 digital manometer. Small enough to fit easily into a shirt pocket, the DPM-100 simplifies the taking of differential pressure readings. Also available is the new ARMflo Balancing Slide Rule which eliminates complex flow programs and calculation, providing direct differential pressure to flow correlation. The engineer simply adjusts the valve handle to produce a differential pressure reading across the fixed orifice that corresponds to the desired flow, without any regard to handle position.