The QR-25’s cast iron construction gives dependable service and has been designed to last a lifetime. Heartland Dairy, the largest cow milking herd in Missouri, uses the QR-25 for the rotary system that hosts the cows while they’re being milked. Everything in the dairy runs on vacuum and air power to optimize production. Heartland Dairy has 8903 Holsteins in the herd with 3729 cows milked 3 times a day, 7 days a week, 365 days a year producing 36,000 all-natural gallons of milk or 6 tanker trucks full everyday.