 |
|
|
|
|
|
|
|
The valve design includes a bulb and capillary assembly charged with a thermally responsive vapor. The expansion/contraction of the vapor acts upon the valve bellows in order to control the flow
of steam through the valve. No external power source is required for operation. |
|
|
|
|
|
|
In this configuration the building air supply feeds a factory installed temperature controller which operates the steam control valve. The temperature controller sends a precise air signal to the
steam control valve which adjusts the flow of steam into the heating coil. The temperature controller is fully adjustable from 50-250oF and requires 20psi air at a maximum consumption
of .5 SCFM. |
|
|
|
|
|
|
|
|
|
A pilot operated control valve is the most widely used type of valve for standard water heating applications. In this type of valve, a temperature pilot device utilizes steam to operate the main
valve. No external power source is required other than steam. This is a highly dependable temperature control system which is suitable for most commercial and industrial applications. As an option, this valve may
include a pressure reducing pilot which limits the steam pressure to a predetermined maximum. |
|
|
|
|
|
|
This control valve is similar to a pneumatically operated system, except in this case the temperature controller is a sophisticated digital display electronic device which outputs a 4-20ma signal
to a compact motor mounted on the steam control valve in order to proportionally control the flow of steam to the heating coil. The temperature controller displays set point as well as actual water temperature and is
available with an RS485 communications port for remote control. |
|
