Installed before the supply manifold, cooling water is displaced by shop air, eliminating the need to drain each cooling water line individually. SWAP Valve is a simple, manually selectable device that supplies cooling water to the mold during processing or air to purge the water from the mold, cooling lines, Supply and Return manifolds before tool change.
Three materials are available:
Reinforced Molded Body with Stainless Steel Disc (1-inch) shown on left
Original Brass Body with Stainless Steel Disc (1 and 2-inch) shown on far right
Anodized Aluminum Body and Disc (1 and 2-inch) shown on right
The 3-position shear valve is a proven design. The valve selector handle has three positions: WATER, PURGE and VENT. A check valve should be installed in the return line downstream from the Return manifold to prevent backflow to the mold. Check valves may be purchased separately.
Tubing may be connected to the manual vent-drain port so any residual water after the purge cycle can be drained into a suitable container or floor drain.
An optional spring-loaded, locking mechanism on the valve selector assembly is available for molders who require additional protection from accidental valve movement.
Application: The SWAP Valve is well-suited for cooling water Supply lines up to 2-inch NPT on frequently changed tools that are hung on small to medium tonnage injection molding machines. It is permissible to adapt 3/4, 1-1/4 and 1-1/2 inch line sizes providing adequate cooling water flow can be achieved. Typical mounting is on the press frame or the safety door frame. Mounting on any suitable surface, such as a platen, mold or manifold stand is acceptable.
Closed Loop Water Systems
An air separator, installed per the diagram on right, will remove air from the water before it reaches the temperature control unit. If temperature control units are not used, an air separator may be installed at the highest point in the return cooling water loop to remove air from the system.