The Do's And Don'ts Of Three-Way Thermostatic ValvesJohn
Jan 27, 2021 · I have a 14.5 year old Viessmann Vitodens 200 with an indirect installed on a steel piped cast iron radiator Monoflow T system, no filters or magnets (with copper tubing between the boiler and steel pipe, and copper tubing between the boiler and the indirect hot water heater); and have never had a problem with the 3 way valve - other than you can hear it on the 2nd floor of the house when it
Dec 12, 2019 · For radiant floors, both the Weil-McLain and Slant/Fin manuals recommend using primary/secondary piping or a method they call Boiler-Bypass to provide return water temperature protection. Slant Fin also says a three-way valve arrangement will work.
3-Way Control Valves or Pressure Independent Valves
Aug 01, 2019 · In comparison a 2-way valve can stop water flow to the coil when there is no need for heating or cooling. This means the flowrate will vary if you use 2-way valves in a system. Historically 3-way valves were used in constant flow pumping systems to maintain the same flow at all times whether there was a need for heating/cooling or not.
Dec 09, 2010 · Three-way valves used on cooling towers present special problems. We are no longer dealing with closed loops, but open loops. Open loop systems are systems open to the atmosphere in some portion of the system. When the condenser is at the same level or above the cooling tower, a three-way diverting valve is recommended in the bypass section.
Apr 01, 2003 · The second three-way thermostatic valve bypasses hot water from the boiler outlet back into the return water flow whenever it senses the return temperature falling below its setpoint. This action limits the amount of heat delivered to the other three-way valve when necessary to prevent the distribution system from gulping down heat faster than the boiler can produce it.
Dec 04, 2017 · That is where we may run into a three-way valve limitation. Three-way valves have a limit to how much pressure they can close against depending on the construction and type of control mode (air, electric, self-contained). They were designed to bypass or mix flows and not to close tight. As a result, the valve will leak through when it tries to close completely providing unwanted flow and heat …