What type of control valves are used for heating and cooling coils?
Plug valves (seat valves), ball valves, and butterfly valves are the most common types of valves used in heating, ventilation, and air conditioning system.
What is a 2 way control valve?
The purpose of a 2-way control valve is to shut off water flow or to control and regulate flow through a pipe. The 2-way valve is characterized by two ports. A 2-way valve can also be used as a shut-off valve. A 2-way valve can either be actuated manually or by electrical, pneumatic or thermal actuators.
What is a modulating valve?
A modulating valve is an automated control valve that can be fully open or fully closed, not just on/off. A modulating valve is a combination of a modulating actuator and a valve. Common valve types are: globe valve, disc valve, and quarter-turn valves (butterfly valve or ball valve).
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. A pressure control valve (PCV) opens and closes based on the set point predetermined by an engineer.
Which is better gate or ball valve?
Ball valves are more effective at forming a tight seal and have more reliability and longevity than gate valves, but tend to be more expensive. They are often used for shutoff and control applications. Because ball valves can open and close immediately, they are more likely than gate valves to cause water hammer.