Valves are the gadgets that are used in regulating, directing, and controlling how fluids flow in passageways. They perform their function by completely opening, shutting, or partially obstructing channels. There are many types of valves in use today due to increased technology. Sherwood valves are one of the best flow regulating appliances currently in use because materials they are made from are of high quality. This article describes basic features and uses of most valves.
Valves can be classified into many classes depending on different criteria. One of the criteria is by the means of actuation. There are five main items classified under this group including manual, motor, solenoid, pneumatic, and hydraulic. Items in all categories have the same parts although there may be slight variations. Major parts include ports, bonnet, stem, disc, seat, handle, and packing among others.
The body is the second outermost casing that covers all internal parts. Bodies are made from various materials including gunmetal, steel, steel alloys, stainless steel, bronze, plastic, cast iron, and brass among others. Seawater causes corrosion on the valve body hence suitable materials that can resist corrosion are used. Hydrofluoric acid, high temperature, hydrogen, and high pressure environments also have suitable materials that are used to make the devices.
The bonnet is the outermost component of the gadget. In most cases it is screwed semi-permanently onto bodies. Bonnets hold all other components inside the body together. Any maintenance work cannot be done with the bonnet in place. It must be removed first to access interior components. Bonnets do not however exist in all models of products. Ball and plug valves are the major examples that lack it.
Handles are externally attached to the device and are used for actuation. They provide a means of externally actuating the gadget without using internal controls. Automatic valve models do not have handles, but if they are available, they are used to override automatic controls. Ports are passageways within the gadget that allow fluid to pass through. Most products have two but they can be more in some models. The ports are normally connected to pipes or other parts. Connection may be done through welding, cementing, gluing, threading, or compression fittings.
Many industrial processes make use of valves including power generation, food manufacturing, chemical and plastic making, mining, oil processing, and sewerage and water processing. In homes, these gadgets get application in hot water systems, taps, washing machines, dish washers, lawn irrigators, and cookers. Fluid flowing through the ports may move in one or two directions.
Temperature and pressure capabilities of the devices are normally labeled on the body. For the gadget to function efficiently, the specified maximum working temperature and pressure must never be exceeded. Leakages may result if these specifications are exceeded. Leaking gadgets must be repaired or replaced before they are used again.
In expensive models, a leaking valve can be repaired. This is done by replacing the seat and maybe the discs. It is the work of the seat to maintain a leak-tight seal hence any form of leaking are mostly caused by it. Seats are classified as hard or soft depending on whether they are made of the same material as the rest of the valve or not.
Valves can be classified into many classes depending on different criteria. One of the criteria is by the means of actuation. There are five main items classified under this group including manual, motor, solenoid, pneumatic, and hydraulic. Items in all categories have the same parts although there may be slight variations. Major parts include ports, bonnet, stem, disc, seat, handle, and packing among others.
The body is the second outermost casing that covers all internal parts. Bodies are made from various materials including gunmetal, steel, steel alloys, stainless steel, bronze, plastic, cast iron, and brass among others. Seawater causes corrosion on the valve body hence suitable materials that can resist corrosion are used. Hydrofluoric acid, high temperature, hydrogen, and high pressure environments also have suitable materials that are used to make the devices.
The bonnet is the outermost component of the gadget. In most cases it is screwed semi-permanently onto bodies. Bonnets hold all other components inside the body together. Any maintenance work cannot be done with the bonnet in place. It must be removed first to access interior components. Bonnets do not however exist in all models of products. Ball and plug valves are the major examples that lack it.
Handles are externally attached to the device and are used for actuation. They provide a means of externally actuating the gadget without using internal controls. Automatic valve models do not have handles, but if they are available, they are used to override automatic controls. Ports are passageways within the gadget that allow fluid to pass through. Most products have two but they can be more in some models. The ports are normally connected to pipes or other parts. Connection may be done through welding, cementing, gluing, threading, or compression fittings.
Many industrial processes make use of valves including power generation, food manufacturing, chemical and plastic making, mining, oil processing, and sewerage and water processing. In homes, these gadgets get application in hot water systems, taps, washing machines, dish washers, lawn irrigators, and cookers. Fluid flowing through the ports may move in one or two directions.
Temperature and pressure capabilities of the devices are normally labeled on the body. For the gadget to function efficiently, the specified maximum working temperature and pressure must never be exceeded. Leakages may result if these specifications are exceeded. Leaking gadgets must be repaired or replaced before they are used again.
In expensive models, a leaking valve can be repaired. This is done by replacing the seat and maybe the discs. It is the work of the seat to maintain a leak-tight seal hence any form of leaking are mostly caused by it. Seats are classified as hard or soft depending on whether they are made of the same material as the rest of the valve or not.
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