Corporation Stops and injection quills are used for injecting chemicals pumped by metering pumps into tanks, mains, cooling towers, and process systems.
A corporation stop is a special stop valve that is installed under pressure, or, “hot tapped”, directly into a water main without draining the system. Corporation Stops allow an injection quill to be inserted or removed through the valve. The quill (often referred to as a “stinger”) extends into the center of the water stream. This provides more uniform dispersion of injection chemical.
High-Pressure Injection Quills are used to safely connect a liquid chemical feed system to a pipeline or vessel. Chemicals are pumped by metering pumps through piping and injection quills directly into the turbulent flow zone of high-pressure water or steam lines where pressure is highest. This allows a more uniform mixing because it prevents chemical from flowing along pipe walls. Many injection quill models have integral spring-loaded ball checks that prevent the flow of the injected chemical into the main flow when the system is shut down.
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