How Does Liquid Level Control work with a Mechanical Dump Valve?

Liquid level control in separation vessels is a critical component of oil and gas production.

The design of Kimray’s Level Controller is to operate in conjunction with a Kimray mechanical dump valve. It maintains and controls the liquid level in oil and gas production vessels. These vessels include heater treaters, two-phase separators, three-phase separators, free water knockouts, and other common oil and gas production applications.

Five primary parts make up a Mechanical Liquid Level Control system: Trunnion Assembly, Float Arm, Flat, Linkage Rod, and Mechanical Dump Valve.

1. Trunnion Assembly

A trunnion assembly attaches to the end of a vessel.

2. Float Arm

The float arm connects the float to the trunnion assembly.

3. Float

Inside the vessel, a float will ride on top of the liquid you want to control. If that liquid is oil, it needs no additional weight. However, if the liquid is water, you will need to add weight to the float. Options for additional weight are sand or bbs. (See our article How to Weight a Float Ball in 5 Easy Steps.)

4. Linkage Rod

The linkage rod is the thin metal bar that connects the Trunnion assembly to the mechanical dump valve.

5. Mechanical Dump Valve

The dump valve is connected to downstream piping. When the float rises to the desired level, the linkage rod rises, lifting the arm on the dump valve, opening the valve and “dumping” the liquid from the vessel downstream to be further processed or sold.


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Mike Fick serves as a Product Manager at Kimray, and is responsible for Kimray’s line of liquid level control products and low pressure control valves. He collaborates with Kimray’s engineering, manufacturing, and quality teams to optimize the performance of our products and make a difference for our customers.

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