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DTV Flow Calculator

Calculate Drain Tempering Valve Sizing

Use the DTV Flow Calculator to estimate the required Cv for a ThermOmegaTech® Drain Tempering Valve (DTV) based on your application conditions.

Known Hot Effluent Flow Rate

Calculate the required cold water flow rate needed to temper hot discharge and determine the required flow coefficient (Cv).

1. Determine the required cold water flow (CW) needed to temper the hot effluent.

HOT EFFLUENT FLOW RATE (HF) GPM
HOT EFFLUENT TEMPERATURE (HT) °F
MAX. ALLOWABLE DRAIN TEMPERATURE (MT) °F
MAX. COLD WATER TEMPERATURE (CT) °F
CW GPM

2. Calculate Cv required to flow that much cold water.

COLD WATER PRESSURE (CP) PSIG
Cv  

DTV Cv Reference Chart

Compare your calculated Cv with the values below to determine the appropriate ThermOmegaTech® DTV size.

DTV WATER INLET SIZE (NPT) Cv
Mini 0.5
1/2″ 2.0
3/4″ 2.0
1″ 4.0

Known Cold Water Pressure

If the hot effluent flow rate is unknown but the available cold water pressure is known, use this calculator to determine the maximum hot effluent flow rate a selected DTV size can temper.

1. Determine the cold water flow rate.

DTV WATER INLET SIZE 1/2″ & 3/4″ NPT DTV WATER INLET SIZE 1″ NPT
Cv 2.0 Cv 4.0
CP  PSIG CP PSIG
Effluent PSIG Effluent PSIG
CW GPM CW GPM

2. Determine the maximum effluent flow achievable.

DTV WATER INLET SIZE 1/2″ & 3/4″ NPT DTV WATER INLET SIZE 1″ NPT
MT °F MT °F
CT °F CT °F
HT °F HT °F
HF GPM HF GPM

Need Help With DTV Sizing?

The DTV Flow Calculator provides sizing estimates based on the values entered. Incorrect or incomplete application data may result in improper valve selection.

If you’re unsure about your application or would like assistance verifying your results, our engineering and sales teams can help.

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The DTV Flow Calculator provides sizing estimates only. ThermOmegaTech® is not responsible for incorrect valve selection resulting from inaccurate or incomplete calculator inputs. Standard Terms and Conditions will apply to any and all orders placed. If you have questions about size selection for your application, consult your local representative or contact our factory for assistance.