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​A Comparison between 2-Way and 3-Way Motorized Valves for Steam Heating Systems

A Comparison between 2-Way and 3-Way Motorized Valves for Steam Heating Systems
2-Way motorized valves
2-way valves can turn on or off the flow of steam from the boiler or other sources into a steam distribution system. A typical example of this valve is using steam to heat radiators in a one or two pipe steam-heated building by the MPC Platinum control.
3-way motorized valves
3-way valves are used to mix heating water to a desired temperature. The hot water from the boiler is blended with the correct proportion of cooler water returning from the system to maintain the target temperature.
Features of 2-way valves
(1) Single-Seated (Sizes 1½ to 2) while all others are Double-Seated
(2) Valves come complete with motors/actuators and transformers
(3) Designed to withstand the temperature and pressure demands of most types of HVAC systems
(4) Valve motor has infinite adjustability between fully open and fully closed
(5) Flange mounted (Sizes 2½ to 10)
(6) Threaded NPT (Sizes 1½ to 2)
(7) High performance direct-drive actuators
(8) Rated for pressures up to 125psi
(9) Contoured plug type for continuous flow even at the smallest opening
(10) Iron body for longevity and durability (Sizes 2½ to 10)
(11) Bronze body (Sizes 1½ to 2)
(12) Bronze Trim (Sizes 2½ to 10)
(13) Stainless-Steel Trim (Sizes 1½ to 2)
Features of 3-way valves
(1) Valves come complete with motors and transformers
(2) The valves and their packing are designed to withstand the temperature and pressure demands of a vacuum system
(3) Valve motor has infinite adjustability between fully open and fully closed
(4) Flange mounted (Sizes 2½ to 8)
(5) Threaded NPT (Sizes 1to 2)
(6) High performance direct-drive actuators
(7) Rated for pressures up to 125psi
(8) Contoured plug type for continuous flow even at the smallest opening
(9) Iron body for longevity and durability (Sizes 2½ to 8)
(10) Bronze body (Sizes 1 to 2)
(11) Bronze Trim (Sizes 2½ to 8)
(12) Stainless-Steel Trim (Sizes 1 to 2)

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