Products
W91/W94 Series for Heating

W91/W94: Heating Applications

The W91/W94 Self-Operating Temperature Regulator is a mechanically operated device designed to regulate system temperature by modulating the flow of a heating or cooling fluid in response to temperature changes; requires no external power source.

Heating Applications



Heating Fuel Oil to Proper Temperature

When the Sensing Bulb is mounted remotely from the actual point of heating (as shown) the Circulation Pump MUST continue to run so that the sensing bulb can sample the product temperature in the heat exchanger. Without product circulation, the temperature control valve will never shut off and the oil will be overheated.

Elevating Temperature of a Plating or Finishing Tank

Sensing bulb should be properly placed inside tank for best temperature consistency. An optional Thermowell (Stainless Steel or Brass) may slightly reduce temperature sensitivity. However, it will isolate sensing bulb and allow for its removal without draining the tank.


Drying Oven Application

W94 Valve used to regulate the temperature of the air flow through an air heating duct. The sensing bulb is installed toward the end of the heating duct and will sense the temperature of the air flowing past the heating coils. When air temperature is below the set point, the valve will open to allow more steam through to the coils to heat the air passing through the duct. Once the desired air temperature is achieved, the valve will begin to modulate closed to maintain the air temperature.

Direct-Acting: Normally Open Valves are used for heating with STEAM. The actuators are designed to move the valve stem closed (in-to-close) as the control signal (temperature) increases.

Direct-Acting: Normally Open Valves are used for heating with LIQUID. The actuators are designed to move the valve stem closed (in-to-close) as the control signal (temperature) increases.