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Patent Searching and Data


Title:
VALVE POSITIONING SYSTEM WITH BLEED PREVENTION
Document Type and Number:
WIPO Patent Application WO/2013/098800
Kind Code:
A4
Abstract:
A valve positioner system (12) with zero bleed at steady state is disclosed. The system has a pilot valve (30), the operation of which is controlled by an electronic circuit (34) powered from a signaling and power connection of a positioner device. A plurality of pneumatic valves (32) are activated and deactivated by the pilot valve to control a valve actuator (14). With varying configurations and arrangements of normally open or normally closed pilot valves and pneumatic valves, fail freeze and fail safe operations are contemplated. The activation and deactivation of the pilot valve is controlled by an electronic circuit that monitors a valve position signal.

Inventors:
TONDOLO FLAVIO (IT)
VALOTI ROBERTO (IT)
Application Number:
PCT/IB2013/000004
Publication Date:
August 22, 2013
Filing Date:
January 02, 2013
Export Citation:
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Assignee:
TONDOLO FLAVIO (IT)
VALOTI ROBERTO (IT)
International Classes:
F15B13/042; F15B20/00
Attorney, Agent or Firm:
PALLINI, Diego (Munich, DE)
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