The Benefits Of A Proportional Pilot Valve
Monday, March 8th, 2010For many manufacturers, proportional pilot valves are a vital part of the creation of their products. These electro-hydraulic valves can change pressure in a range from 0 to 435 pounds per square inch (PSI), or from 0 to 30 bar. This allows for a wide flow range that can fluctuate from 0.15 liters per minute at a low level to 1.32 liters per minute when set at 435 PSI or 30 bar. This differing range can also be expressed as 0.04 to 0.35 gallons per minute.
Proportional pilot valves have the advantage of operating under a variety of contamination levels. For levels that top out at ISO 4406 19/16, a proportional pilot can operate continuously without problems. When the contamination levels exceed ISO 4406 25/20, however, the valve can only operate intermittently.
Proportional pilot valves have changed the way many products are made. Because they are small and yet easily operated, they can be used in more products than ever. They allow a considerably high pressure and high flow feed, which generally requires a larger force to control. However, these strong valves are able to withstand high pressures with ease.
These valves are designed for infinite positions and are normally closed. Because of their flexibility, they can work with three-way pressure control, making it an extremely useful component for many manufacturers. The proportional pressure unit’s simplicity of design is a great achievement in pressure control, allowing for fewer parts to be required to create a fully functioning product.
Some of the widely used applications for a proportional pilot valve are in vehicles. The clutch control in a power shift transmission requires the use of a proportional pilot valve in order to correctly control the pressure in the clutch. Off-road vehicles are another common product that takes advantage of the flexibility of a proportional pilot valve in controlling pressure. Emergency and safety controls or shut-offs need pressure valves for instantaneous changes in pressure. For other machines and equipment, a pilot valve is added in order to manipulate the pressure output in a spool or piston.
Typically, a proportional pilot valve is human-operated. The controls of the unit can be set off by a switch or a handle which is connected to the valve. However, they can also be linked to a dead man’s switch in some applications, allowing the machine or product to cease its activity if the operator is incapacitated.
Proportional pilot valves are a great solution for products that need the control of high pressures. Remember that these valves are not designed for low pressures or vacuums. In the correct setting, however, a pilot valve can become one of the most important components in a product. The addition of this piece can allow your vehicle or shut-off switch to perform quicker and more efficiently than ever.
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