Trunnion Ball Valve - A Brief Introduction
The trunnion ball valve is a type of valve that was created by the Japanese in the 1930's. The two main types of trunnions are the straight and the curved ones (top or side entry)
The straight trunnion design can be cast in monolithic or forged. The body is forged or molded and then shaped by adding the trunnion into the mold. It has a single, flat center spindle that is screwed into the top and bottom of the body. There are many types of trunnions to choose from for different types of applications.
The curved trunnion ball valve has two different types. The first is the straight trunnions where the body is made with two parts that are shaped like a concave curve. The second is the monostable, which has the same shape as the body but has two parts that are curved as well. There is no need to cast the body in monostable form because it can be pressed into the mold. Both the curved and the straight trunnions have a single, flat spindle that is threaded.
There are other types of trunnions that are available such as the rotary, the ball valve with push button, the screw ball, the pop-up valve, the pop-down valve, and more. Some of these are very versatile and can be used for different types of applications. One type is the rotary trunnion. This valve has a single, flat, body that is drilled out and formed. There is a groove that is cut on the body so that the body can fit over the end of the spindle. When the screw is turned, the body will either come up over the top of the spindle or slide down through the grooves.
The screw, pop-up valve uses the lever system to open and close. It also has a groove cut into the body where the body is screwed into. When the screw is turned, the body slides into the groove and pushes the screw outward and out of the body. The pop-up valve, on the other hand, uses the lever system of a thumb that pushes the button open and then pushes the valve back into the body.
If you are looking for a trunnion ball valve to use in your home, there are many manufacturers out there that make these. There are even websites that can provide some basic information about trunnions that you can check out to determine which would be the best option.