V-Port ball valves are by far a more economical solution. A check valve, clack valve, non-return valve, reflux valve, retention valve or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. Globe valves are named for their spherical body shape with the two halves of the body being separated by an internal baffle. Similarly, the next two symbols are for three-way and four-way valve. Valve Weight; ISO & Achilles Certificate; Documentation; Valve Dimensions. Check valve symbol on piping and instrumentation diagrams. 3-way and 4-way ball valves can contain additional detail that defines the type of ball drilling which is either a “T” or “L” port ball. Ball valves have a stem and ball, which turns horizontally, and are commonly referred to as “rotational” valves. Typically, a V-Port Ball Valve will be 35% to 50% less than a Globe Valve. Whereas, globe valves have a stem and plug, which strokes linearly, and gives them their other name of “stroke” valves. There are a multitude of other valve types as well. Valve Terminology; CV Factors – LVF Valves ; LVF Valve Material; Valve Symbols-> DICTIONARY - VALVE … … And ball, gate and globe valves are used to control flow of liquids. Subsequent two symbols are of a check valve and stop check valve. The next symbol is the excess flow valve. Globe valves are good for regulating flow, whereas ball valves are better for on/off control without pressure drop. Another detail that may be represented in the diagram is the flow path in the non-actuated or de-energized state. Pictures. These valves in all forms are used to create waterways, and it is therefore essential to understand the differences and their uses. Globe Valve Symbol: Check Valve Symbol 1: Ball Valve Symbol: PLug Valve Symbol: Butterfly Valve Symbol: Needle Valve Symbol: Check Valve Symbol: Diapragm Valve Symbol: Safety Relief Valve Symbol: Technical. The arrow shows the flow direction. Ball valve made of solid elements offers high durability, and have the ability to function perfectly even after long idle time. For decades globe valves were considered the industry standard in control valves. Vertical lift check valve. A globe valve uses a plug (stem) that closes against the flow, and a ball valve has a gate (ball) that closes across the flow. A globe valve, different from ball valve, is a type of valve used for regulating flow in a pipeline, consisting of a movable plug or disc element and a stationary ring seat in a generally spherical body. While considerably more expensive, Globe valves do still offer the many advantages listed (table 2). If there are no specific reasons listed previously to choose one vs. the other, then you should consider cost. Ball Valves . It can be a plug or ball valve. Ball Valve: Withstand extreme pressure/temperature and high volume flow. Ball valves are best suited to applications requiring on/off … There are dedicated symbols for a gate, globe, plug, ball valves which I will explain to you in minutes. This is shown using small arrows next to the symbol as shown below. These check valves can be swing check or lift check valve.