The DOS and DOT Series Control Valves (formerly Leslie Controls) were originally manufactured and installed globally in the 1970s and are now classified as obsolete. While Armstrong International no longer produces these valves, we can provide new valve sales, engineering, aftermarket and spare parts support.
Non-OEM parts may offer an initial price advantage, but that’s where the benefits end. These parts often lack the precision engineering, material integrity, and compliance required for critical valve and actuator applications. When tolerances are measured in thousandths of an inch, even the smallest deviation can lead to premature failure, unplanned downtime, and increased total cost of ownership.
Contact your Armstrong International local rep for price and delivery on the above formerly Leslie Controls product lines.
Please have the following information available when requesting valve parts: