Chemical changeover system having a reservoir tank having a submerged pump in fluid communication with a bleed path and a recirculation path to maintain a liquid level in the reservoir tank

• Main Author: Salerno, Mark H
• Format: Patent
• Language: English
• Published: 05.05.2020
• Subjects: BLASTING; BOTTLES, JARS OR SIMILAR CONTAINERS; DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISEPROVIDED FOR; HEATING; LIGHTING; LIQUID HANDLING; MECHANICAL ENGINEERING; OPENING, CLOSING; PERFORMING OPERATIONS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BYUSING INERTIA OF FLUID TO BE PUMPED; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; SIPHONS; TRANSPORTING; WEAPONS

A system for supplying a liquid. A reservoir tank has a low level and a high level of the liquid. A pump is submerged in the liquid within the reservoir tank. The pump has an inlet to receive the liquid from a source outside of the reservoir tank and an outlet to deliver the liquid to a destination outside of the reservoir tank. A bleed path places the pump outlet in fluid communication with the reservoir tank. The bleed path has a bleed valve controlling the flow of liquid through the bleed path to maintain the liquid level in the reservoir tank above the low level. A recirculation path places the pump inlet in fluid communication with the reservoir tank. The recirculation path has a recirculation valve controlling the flow of liquid through the recirculation path to maintain the liquid level in the reservoir tank below the high level.