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From clippard.com
Proportional pneumatic valves can have hysteresis levels as high as 15%, which can wreak havoc on closed-loop control systems. Another problem with proportional valves is that they often vary from one to another in terms of maximum flow and gain. Gain is the rate of flow change to valve input current, and engineers require consistency and linearity for tight control.
To solve these problem Clippard Instrument Laboratory, Cincinnati (www.clippard.com), redesigned its EV valves, combining elements of low power and fast operation with a single moving part of provide a high cycle life. They found these characteristics could be used to make superior proportional valves.
Products & Services
Industrial valves are classified in many different ways. They can be distinguished by material of construction, media handled, and/or application.
Solids valves are used to control or regulate the flow of powder, granular and other bulk solid materials along a process line, or to and from process units, storage bins, conveyors and product packaging.
Gas valves are used to handle and control the flow of gaseous media such as liquefied petroleum and natural gas. They are made of metal or plastic and vary in terms of valve size, pressure rating, number of ports, and flow.
Servo valves provide closed loop flow or pressure response to an electrical or electronic control signal. They are used in air, gas, and liquid applications.
Web controllers maintain control functionality over processes with web or sheet rollers. Control functionality includes maintaining tension of the web, centering on the track, and material feed rates.
Product Announcements
Topics of Interest
Proportional valves are a great alternative when an application requires more than on-off control, but not the high precision and expense of servo valves. As such, proportional valves are widely used...
(Read More)
Designers of ventilators, respirators, and blood pressure monitors could benefit from a new proportional pneumatic valve that reportedly offers greater air flow control accuracy. The new valve,...
(Read More)
Since 1974, Clippard Instrument Laboratory has produced their EV series valve, which combines simple design, low power consumption, fast operation, and long life (applications have exceeded 3 billion...
(Read More)
Clippard Instrument Laboratory, long a pioneer in the miniature pneumatic industry, has achieved a breakthough in proportional valve technology with the introduction of the EVP series proportional...
(Read More)
Innovation sometimes makes it possible to have your cake and eat it too. Solenoid valves are inexpensive devices that provide on-off flow control with its concomitant wide error band. When accurate...
(Read More)
Technical Articles
A Look At Final Control Elements
- Temperature Sensing
Miniature Ball Bearings: Handle with Care
- Bearings and Bushings
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