MAC’s Latest: JD Norman Testimonial Video! MAC’s Latest: JD Norman Testimonial Video! October 27, 2017 By October 27, 2017 In MAC News Check out the latest video released by MAC Valves featuring highlights of a testimonial by JD Norman Industries on the MAC Pulse Valve on a dust collector application! For more information on Pulse valves please click here. More by Share000 Tags FeatureNews 39 Newer New Pulse Valve Video! Older New MAC Liquid Bullet Valve® Flyer!