Introduction to the Types of Valves:

Since of the diversity of the categories of systems, fluids, and environments in that valves must operate, a vast array of valve categories have been established. Instance of the general categories are the gate valve, globe valve, plug valve, ball valve, diaphragm valve, butterfly valve, check valve, pinch valve, and safety valve. Every categories of valve has been designed to meet exact requirement.

A few valves are capable of throttling flow, other valve categorizers could only stop flow, others work well in corrosive systems, and others handle high pressure fluids. Every valve categories has certain inherent benefits and drawback. Understanding these differences and how they effect the valve's application or operation is essential for the winning operation of a facility.

While all valves have the similar primary elements and function to control flow within a few fashion, the method of controlling the flow could vary dramatically. In common, there are four methods of controlling flow by a valve.

1. Move a disc, or plug within or against an orifice (for instance, globe or needle type valve).

2. Cylindrical, Slide a flat or spherical surface across an orifice (for instance, gate and plug valves).

3. Rotate a disc or ellipse about a shaft extending across the diameter of an orifice (for instance, a butterfly or ball valve).

4. Move a flexible material within the flow passage (for instance, diaphragm and pinch valves).

Every method of controlling flow has features which make it the best choice for a provided application of function.