The Model BV60 Brodie Control Valves are back pressure regulators designed to maintain a specific minimum upstream pressure regardless of fluctuations in flow rate or downstream pressure. When correctly installed and adjusted, the Model BV60 valve will maintain up stream pressure at a value within +/-2 PSI (13.8 kPa) of the valve pilot’s setting. A minimum pressure differential across the valve of 15 PSI (103 kPa ) is required for it to fully open.
Principle of Operation
The Model BV60 valve is controlled by a back pressure pilot which senses line pressure at a selected point upstream of the valve and throttles the valve to maintain a desired minimum pressure at that point. If line pressure at the sense point exceeds the setting of the pilot, the pilot throttles the valve open until the correct pressure level is reached. Conversely, if line pressure at the sense point falls below the setting of the pilot, the pilot throttles the valve closed until the correct pressure level is reached.