3 Way Valve Function In Chilled Water System

A 3 way valve as the name imp lies has three openings.

3 way valve function in chilled water system. In actuality one of the air handlers has a three way valve with a bypass straight from the chilled water supply to the return line i e. A chilled water system is a cooling system in which chilled water is circulated throughout. This is a low d p application. In chilled water line criteria to use2 or3 way valve depends on the application type.

Two way valves are installed at most coils with just enough three way valves installed to maintain the minimum flow re quired by the chiller. Plug and spindle valve positions can be adjusted to ensure that the system in question operates within the optimum efficiency range typically when the valve is 30 80 open. When this air handler does not need all the cooling it can get it simply bypasses the chilled water and contributes to a low delta t condition. 2 way and 3 way control valves for ahu and fcu.

For three way valves used in chilled water hot water summer winter changeover mixing two position or diverting use a line size valve. 2 way valves are recommended in primary only variable speed pump. In chilled water line criteria to use2 or3 way valve depends on the application type. As in two way valves if the three way valve selected is less than line size don t forget the fp factor.

When working as a single inlet two outlet system they can be used as diverting chilled water valve s which divert part of the flow in another direction. Resize the valve applying the fp factor to find the new cv. The system uses 3 way control valves at air handler coils that allow some water to bypass the cooling coil during part load conditions. 3 way valves are not suitable for this system.

When functioning as a two inlet single outlet system these valves can be used for mixing fluids. To maintain a minimum flow across chiller a motorised bypass valve is used. 2 way valves are recommended in chilled water piping with primary const. This minimum rate which can be obtained from the manufacturer will vary with design chilled water flow rate and the chiller type size and manufacturer but is.

2 way valves are recommended in chilled water piping with primary const. 3 way valves are not suitable for this system. Retrofitting a 3 way valve into a. Flow and secondary variable speed pump.

For some chilled or hot water applications 2 way valves are also an ideal solution. Flow and secondary variable speed pump. At low loads the. Check out my gear on kit.

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