What is trunnion mounted ball valve?

A trunnion mounted valve means that the ball is con- strained by bearings and is only allowed to rotate, the majority of the hydraulic load is supported by the Sy- stem constraints, resulting in low bearing pressure and no shaft fatigue.

How do you determine valve position?

The basic valve sizing equation Q = Cv√∆P can be used to calculate pressure drop, flow rate, or the flow coefficient. For solutions other than water, a correction for a difference in specific gravity of the solution is necessary. This revised formula would be: Q = Cv[√∆P/Sg] with Sg = specific gravity of the liquid.

What is port size of control valve?

Port size is the size of the opening that fluid can travel through when the ball valve is in the open position.

How many types of ball valves are there?

There are four general types of ball valves: full port, standard port, reduced port, and v port. A full port ball valve has an oversized ball so that the hole in the ball is the same size as the pipeline resulting in lower friction loss. Flow is unrestricted, but the valve is larger.

What is trunnion mount?

A Trunnion mount shock mounts the shock body directly to the linkage – there are two threaded holes on the shock body and linkage bolts thread directly into them. A Trunnion mount shortens the overall eye-to-eye length of the shock while allowing it to have the same amount or more, of shock stroke.

How do you choose valves?

Selecting your Valve

1. Choose a valve type depending on your application.
2. Consider your fluid type (liquid or gas) and its characteristics to determine compatible valve materials.
3. Determine the temperature, pressure, and flow rate under which your valve will be operating.

What is a standard port ball valve?

The difference between a standard ball valve and a full-port ball valve is in the size of the ball and bore in relation to the nominal pipe size of the valve. The standard-port ball valve causes a larger pressure drop when it is full open; it is typically used for regulating flow to a coil.

How do I choose a control valve size?

So, how do you size a control valve anyway? When sizing a control valve, the rule of thumb is to size it so that it operates somewhere between 20-80\% open at maximum required flow rate and whenever possible, not much less than 20\% open at the minimum required flow rate.

What are ball valves made of?

Ball valve housing materials The ball is usually made of chrome plated steel, chrome plated brass, stainless steel or PVC. The seats are often made of Teflon, but could also be made of other synthetic materials or metals.