Brodie International Model BV10, normally closed, and BV11, normally open, solenoid operated Control Valves are designed for remote on-off flow control. They are externally piped with a needle valve (speed of response control) and strainer as standard equipment.
Principle of Operation
The valves are pilot operated and operate on a balanced piston principle, spring biased to a closed position. Pressure differential overcomes the force of the spring, causing the main valve to open and establish flow. The pilot varies the pressure on the spring side of the piston for position.