Three-way Mixing Valve
“Tri-M”
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Specification: Three-way mixing valve ”Tri-M” 145 PSIG (PN 10 Bar) up to 248°F (120 °C), for short periods up to 284°F (140 °C). Bronze body. Connection thread M 30 x 1.5. Steady or two point control with temperature controllers or electrothermal electric actuators. Three-way mixing valves ”Tri-M” are supplied with collar nuts for the connection of either weldable tailpipes made of steel or solder- or screwed tailpipes made of brass.
Accessories sets: Weldable tailpipes DN...3/4” (20), 1” (25), 1 ½” (40 mm) Solder tailpipes ½” (15), ¾” (18), 1” (22), 1 ¼” (35), 1 ½” (42 mm) Screwed tailpipes 1/2”, 3/4”, 1”, 11/4”, 11/2” (Male Threads)
Function: Three-way mixing valves ”Tri-M” have two inlet ports and one outlet port. Depending on the position of the valve disc, the cold and hot water is mixed. For commercial two point controls, the electrothermal actuator is used, with the straight port being opened with current ”off” and the port opposite the actuator being closed. Reversed action with the current ”on”. The working procedure of the actuators can be reversed, i.e. straight port closed with current ”off”. Pressure waves are not produced during changeover and the volume of flow remains constant. Our actuators have an expansion type working element which is heated electrically. When using a steady control, Our temperature controllers with immersion sensor or our temperature controllers with contact sensor are used. These are proportional controllers working without auxiliary energy and allowing intermediate positions. With the temperature at the sensor rising, the straight port is opened and the angle port is closed.
Model: Valve body made of corrosion-resistant bronze, inner parts made of brass and stainless steel, EPDM washers.
Application: Mixing and changing over of the flow in bivalent heating systems or hot water storage cylinders, e.g. solar heating and heat pump installations. Temperature of fluid up to 248°F (120° C), for short periods up to 284°F (140 °C). Permissible pressure difference: ¾” 750 mbar, 1” 500 mbar, 1 ½” 200 mbar (tight closing in final positions of the valve disc). Max. working pressure: 145 psig (10 bar)
Examples of installation
Increase of return temperature for solid fuel boilers. The desired return temperature is set at the temperature controller. With the return temperature increasing, the bypass between the supply and return pipe is throttled and vice versa. Use in a bivalent heating system With a sufficient duration of sunshine, the solar heating system is in operation. Is this duration not sufficient, the oil- or gas fired boiler is added to the heating circuit by means of the three-way mixing valve. A constant temperature of domestic water is thus guaranteed.
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