Dual Chamber Control Valve - Full Port with Mechanical Check - M518, M1518

Series M518, M1518 are full port, dual chamber basic valves that incorporate a two-piece telescoping disc and diaphragm assembly. This assembly is the only moving part within the valve, allowing it to open or close as commanded by the pilot control system. The lower portion of this two-piece assembly is a mechanical check feature, which acts independent of diaphragm position or pilot control system, and provides immediate check action when flow ceases. When pressure is applied to the upper diaphragm chamber and released from the lower diaphragm chamber, the valve travels to a closed position. When pressure is applied to the lower diaphragm chamber and released from the upper diaphragm chamber the valve travels to a full open position.

Features

• Mechanical check feature provides immediate check action when flow ceases.
• Simplified and efficient design is easy and economical to maintain
• Two-piece assembly opens and closes as commanded by the Pilot Control system
• Body and cover are constructed of strong and durable ductile iron (ASTM A536)