The CDS line of evaporator control valves features 12-vdc bipolar stepmotors. Because the valves are powered from external controllers, no pilot lines or high- to low-side bleeds are required, translating into increased efficiency for the system, the manufacturer says. Refrigerated case temperatures can be controlled to ±0.1°F, which satisfies temperature control regulations and extends product life, says the company. Fast pulldown after defrost and tight shutoff are additional features of the valves.

Sporlan Valve Co., 206 Lange Drive, Washington, MO 63090; 636-239-1111; 636-239-9130 (fax); (website).