Specification:

Three-way diverting valve ”Tri-D” 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 diverting valves ”Tri-M” are supplied with collar nuts for the connection of either wieldable

tailpipes made of steel or solder- or screwed tailpipes made of brass.

Function:

Three-way diverting valves have one inlet port and one two outlet ports. Depending on the position of the valve

disc, the direction of flow is diverted from one to the other outlet port. For commercial two point controls, the electrothermal actuators are used, with the straight port being closed with current ”off” and the port opposite the actuator being fully opened.

Reversed action with the current ”on”. The working procedure of the actuators can be reversed, i.e. the straight port is opened 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 closed and the angle port is opened.

Model:

Valve body made of corrosion-resistant bronze, inner parts

made of brass and stainless steel, EPDM washers.

Application:

Diverting 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

Use in a heating system with air heater

The outlet temperature of the air heater is controlled.

Control of underfloor heating systems

The flow temperature of the underfloor circuit is limited

to the set value.

Use for hot water storage:

Direct heating of domestic water by means of a heatpump

often proves to be difficult as a result of fluctuating heat

supply.

The problem may be solved by means of a storage charging

connection:

The domestic water circulates through the three-way diverting

valve and the heat exchanger until the required water

temperature is reached. Only then, the three-way diverting

valve opens and the storage cylinder is filled from the top. At

the same time, cold water is taken from the lower level to be

heated.

This sequence is controlled by the thermostat 1 (in) and the

thermostat 2 (out).