DunAn Microstaq
Electronic expansion valves with 6–8-ton cooling capacities
This company recently expanded its family of Modular Silicon expansion valves (MSEV; photo) to include cooling capacities of 6, 7 and 8 tons (R-410a). The MSEV is an electronically controlled, normally closed and one-directional flow valve. It can be used for refrigerant mass-flow control in industry-standard HVAC (heat, ventilation and air conditioning) and refrigeration systems. The MSEV provides precise superheat control and quick mass-flow adjustments through a closed-loop control methodology achieved with the company’s Universal SuperHeat Controller (USHC). Embedded with the newest generation of MEMS chip, silQflo Silicon Servo Valve (SSV), the MSEV is said to be the fastest-responding refrigerant expansion valve in the industry. — DunAn Microstaq, Inc., Austin, Tex.