What does a flow control valve do on a boiler?
The flow-control valve is intended to prevent hot water from circulating up through a heating zone by natural convection – as will occur even if a circulator is “off” unless we have a type of check valve to prevent it.
What valves are used on a boiler?
Boiler Trim Valves
- Ball Valves.
- Globe Valves.
- Angle Valves.
- Blow Down Valves. (Slow Opening)
- Blow Down Valves. (Quick Opening)
- Swing Check Valves.
- Lift Check Valves.
- Whistle Valves.
What is the purpose of a flow check valve?
Flow check valves are controls that prevent hot or chilled water from circulating in the heating or cooling system at certain times.
Does a flow control valve reduce pressure?
The valve limits the reservoir filling flow by simply reducing the pressure upstream from the orifice (between the orifice & the valve), thereby prioritizing consumers over reservoir filling, and providing level control and valve cavitation protection.
What position should valves be on boiler?
Keeping your hand on the valve, you will hear the water entering the boiler. Watching the pressure gauge, you will see the black needle rising. Ideally the pressure should be 1.5 bar, or the needle should be at the 10 o’clock position.
Do I need a backflow preventer on my boiler?
Why do we need a Backflow Prevention Device on Heating Boilers? Because a building potable water supply piping cold water line is used to deliver water to hydronic or steam heating boilers, we need to prevent heating system water from back-contaminating the building water supply piping.
What is the difference between flow control valve and pressure control valve?
The flow control valves are used for controlling and adjusting the fluid or gas flow through the system. The pressure control valve is used to regulate the pressure of a fluid passing through the pipe. The flow control valve (FCV) is exactly the same except it gets it’s signals from a flow transmitter (FT).