Valve unit for an electrostatic coating installation
First Claim
1. A valve unit for an electrostatic installation for series coating of workpieces, comprising a remote-controlled switchable valve whose moveable valve element is moveable between two switch positions and in one switch position releases a path for a medium flowing through the valve, whereas said valve is closed when said valve element is situated in its other switch position, wherein for interrogation of the switch position of said valve and for generation of a corresponding interrogation signal, an opto-electronic sensor device with at least one optical waveguide sensing movement of said valve element between at least two switch positions.
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Accused Products
Abstract
The main needle valve of an electrostatic atomizer has an opto-electronic sensor device with optical waveguides whose faces are opposite a reflecting element of a component moveable with the valve needle for potential-free switch position interrogations.
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Citations
14 Claims
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1. A valve unit for an electrostatic installation for series coating of workpieces, comprising a remote-controlled switchable valve whose moveable valve element is moveable between two switch positions and in one switch position releases a path for a medium flowing through the valve, whereas said valve is closed when said valve element is situated in its other switch position,
wherein for interrogation of the switch position of said valve and for generation of a corresponding interrogation signal, an opto-electronic sensor device with at least one optical waveguide sensing movement of said valve element between at least two switch positions.
Specification