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Type 650 Positive Bias Relay0 pages
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| CA T650 Spec Sheet 1/5/05 12:22 PM Page 1 | |||||||||||||||||||||
| Type 65 | |||||||||||||||||||||
| Positive Bias Relay | |||||||||||||||||||||
| capacity plus adds an adjustable | |||||||||||||||||||||
| Used extensively for increased flow capacity or remote pressure control applications, the Type 650 positive bias relay is a signal operated regulator that provides an output pressure that is the sum of the input signal pressure plus an adjustable preset bias. The unit allows flow capacities up to 50 SCFM with minimal pressure drop. The Type 650 is most often used for conversion of a low flow control signal to the higher flow requirements of an operating system. | |||||||||||||||||||||
| FEATURES | |||||||||||||||||||||
| •High Flow Capacity Allows flows up to 50 SCFM •Four Bias Ranges From 0-15 psi to 2-150 psi •High Relief Capacity Large relief valve provides 15 SCFM relief capacity •Balanced Supply Valve Rolling diaphragm design makes unit insensitive to supply pressure variation •Accurate Pressure Conversion High sensitivity achieves accurate conversion of signal to output with no lag Principle of Operation A pressure introduced through the signal port in combination with the bias spring creates a downward force on the upper diaphragm area. This force is balanced by the output pressure acting against the lower control diaphragm area. If signal pressure and/or bias spring force is increased above the output pressure then there is a net downward force on the diaphragm assembly causing | |||||||||||||||||||||
| ] Supply J—J Output | |||||||||||||||||||||
| the supply valve to open. | |||||||||||||||||||||
| J Pressure | |||||||||||||||||||||
| ' Pressure | |||||||||||||||||||||
| Output pressure increases until equilibrium is achieved. | |||||||||||||||||||||
| □Signal I—I Atmospheric | |||||||||||||||||||||
| Pressure I—I | Pressure | ||||||||||||||||||||
