Dual Chamber Control Valve - Full Port with Mechanical Check - S518, S1518

Series S518, S1518 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. The Stainless Steel design offers superior corrosion resistance, as well as a lightweight alternative to conventional heavy iron valves. Stainless Steel construction provides extended diaphragm life, and reduces the frequency and labor costs associated with traditional maintenance repairs.

Features

• Simplified and efficient design is easy and economical to maintain
• Two-piece assembly opens and closes as commanded by the pilot control system
• Mechanical check feature provides immediate check action when flow ceases
• Stainless Steel construction offers superior corrosion resistance for longer life