Zone control devices, systems and methods

A device comprising:

• a main body including a base portion having an inlet passage and an outlet passage and a body portion extending from the base portion, the body portion in fluid communication with the inlet passage and the outlet passage and including a filter chamber for receiving a filter;
• a flow tube extending within the filter chamber from the inlet passage, the flow tube defining a valve seat;
• a valve assembly couplable to the body portion, and having:
• a housing defining a solenoid socket for attaching a solenoid and a pressure regulator socket for attaching a pressure regulator,
• a valve having a diaphragm,
• a pressure chamber between the valve and the housing, and
• a vent passage extending between the pressure chamber, the solenoid socket, the pressure regulator socket, and the main body,
• wherein, in an operational state of the device, venting of fluid through the vent passage is controlled by the solenoid and the pressure regulator to control movement of the diaphragm relative to the valve seat.

A valve assembly comprising:

• a valve housing, an inflow passage and an outflow passage;
• a valve intermediate the inflow passage and the outflow passage, the valve having a closed position where fluid flow from the inflow passage to the outflow passage is blocked and an open position where fluid flow from the inflow passage to the outflow passage is permitted;
• a pressure chamber disposed on one side of the valve within the valve housing, a pressure chamber entrance passage permitting fluid to flow from the inflow passage into the pressure chamber to build up pressure in the pressure chamber;
• an opening defined by the valve housing at the pressure chamber;
• and
• a bleed cap having at least a portion positioned exterior of the valve housing, the bleed cap rotatable between a closed position where the bleed cap blocks flow of fluid from the pressure chamber out the opening and an open position where the bleed cap does not block flow of fluid from the pressure chamber out the opening,
• wherein in the open position fluid from the pressure chamber flows through a tortuous pathway between the bleed cap and the valve housing, the tortuous pathway reducing a velocity of the fluid as it is discharged from the bleed cap.