What is ball valve mechanism?

A ball valve is a shut off valve that controls the flow of a liquid or gas by means of a rotary ball having a bore. By rotating the ball a quarter turn (90 degrees) around its axis, the medium can flow through or is blocked.

What type of valve is a ball valve?

quarter-turn valve
Ball valves are a type of quarter-turn valve along with plug valves and butterfly valves. They can be operated manually or by using an actuator. The simplest operation of a ball valve is through the use of a wrench or a lever manually turned by an operator.

What are the parts of ball valve?

Parts of a Ball Valve

  • Valve Body. This is the main part of the valve and contains all of the components for on/off control.
  • Rotary Ball. The ball is designed with a center bore (hole) that the media flows through.
  • Stem. This connects the ball to the external control mechanism.
  • Seats.
  • Power Source.
  • Packing.
  • Bonnet.

What is 2 piece ball valve?

Two-piece ball valves are some of the most common ball valves used. As the name suggests, the two piece ball valve consists of two pieces, one piece that has one end connection and the body. The second piece fits into the first, holds the trim in place and includes the second end connection.

How does a 2-way ball valve work?

This is because of their simplicity and reliability. Two-way valves have two ports or openings where pipe or tubing is connected to the valve. The ball in two-way ball valves has a single straight hole through it where the liquid or gas (media) passes through the valve.

What are the two main types of valves?

Common functional designations and their common design types include: Isolation Valves: Ball, butterfly, diaphragm, gate, pinch, piston, and plug valves. Regulation Valves: Ball, butterfly, diaphragm, globe, needle, pinch, and plug valves.

What is valve size?

When sizing a control valve, the most common approach is to calculate the flow coefficient, Cv which is a measure of the capacity of the valve body and trim. A valve Cv can be described as the number of gallons per minute (GPM) at 60oF (15.5oC) that will pass through a valve with an associated pressure drop of 1 psi.