DunAn Microstaq Inc. has expanded its modular silicon expansion valve (MSEV) product family for cooling capacities from sub 1 to 50 tons in R-410A and comparable low GWP replacement refrigerants.
The product family is comprised of three capacity ranges: modular silicon expansion valve (1 to 8 tons), high-capacity modular silicon expansion valve (10 to 25 tons) and very high-capacity modular silicon expansion valve (26 to 50 tons). The fast response of these valves is achieved by the embedded ultra-fast MEMS based piloting silQflo® silicon servo valve (SSV).
The valves are autonomously controlled by DMQ’s palm sized Universal SuperHeat Controller (USHC). The control algorithm is designed and qualified to work with single-stage, dual-stage and variable speed compressors with embedded intelligent control algorithms.
The USHC is a smart controller that consists of an integrated pressure sensor, an external temperature sensor and a pulse-width-modulation (PWM) driver that can be read over a RS485 communication BUS using MODBUS RTU protocol. It is preprogrammed with the most common ASHARAE A1 as well as several A2 safety class refrigerants thereby offering HVAC/R manufacturers a plug-and-play solution. This capability reduces engineering time and enables manufacturers to qualify and deploy their products to the market in a short time frame.
The MSEV and USHC are qualified for air handling units, air-source and water-source heat pumps, chillers, self-contained refrigeration systems and refrigerant based data center cooling systems.
Image credit: DunAn Microstaq Inc.