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• The Advantages Of The Butterfly Valves
• The Applications Of The Gate Valves
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• What Are The Ball Valves?
• Be Safer With A Safety Relief Valve
• Be Safer With A Properly Used Egr Valve.
• The importance of the valve springs
• How To Use The Control Valves
• The Use Of The Solenoid Valves
• The History Of Valves
• Be Safer With A Pressure Reducing Valve
• Aluminum valve covers

The Applications Of The Gate Valves

The gate valves, also named slide valves are designed to bring the pressure drop across the valve to a minimum level. This valves (that are also called by some experts as knife valve) are linear motion valves. In this valve a flat closure element will slide into the flow stream to shut it down completely. The direction of the material flow will not change a bit. Also, it is important to know that the diameter through which the fluid will pass is actually the same with the diameter of the fluid in the pipe. Also, they tend to be in a minimum pressure drop, when opened to the maximum potential.

There are two types of gate valves. The first is the parallel one. This gate valve is based on the use of a flat disk gate, placed between two parallel seats: upstream and downstream. They also have a sharp edge at the bottom, used for shearing entrained solids and even separate slurries. There is also another type of parallel-seat gate valves. The double-disk parallel-seat type is different because the disk from the valve neck is lower, to be at the same height with the valve seats. The advantage of this gate valve is that it can accommodate both asymmetric and angularly valve seats. The second gate valve type is the wedge-shaped gate valve. This type of valves uses two inclined seats, and a mismatched inclined gate, in order to allow for tight shut-off. It is very flexible, and because of that it can seal easier and also, it can reduce stickiness between the sealing surfaces.

Where do we use the gate valves? Mainly in applications that usually involve viscous liquids, such as light grease, honey, heavy oils, cream and other non-flammable liquids of this kind, molasses or varnish. This happens because the valves' "gate" can cut directly through the viscous material. The gate valves usually come in large sizes, in order to be handled better in a thick flow. The advantage is that the gate valves can be used whenever a shutoff valve is required. Also, this type of valves can easily be used in places where throttling abilities are needed, although it is not quite recommended. Due to the specific vibration in throttling uses, erosion of the disk and seat might occur. The disadvantage is that the gate valves have low-pressure levels, and are not so good in applications that involve cleanliness or sanitary conditions.