Valve control transmitter feeds back continuously
A
Westlock Controls product story
Edited by the Engineeringtalk editorial team
Nov 15, 2006
Noncontact transmitter eliminates position blind spots during the stroke of a valve by supplying continuous feedback of either rotary or linear valve position.
New from Westlock Controls, the D-Epic is a 4-20mA, Hart-enabled, noncontact transmitter that eliminates position blind spots during the stroke of a valve by supplying continuous feedback of either rotary or linear valve position.
The D-Epic control transmitter features an integrated, low power solenoid used to control and monitor discrete valves, as well as integrated PST functionality.
The device provides a cost-effective alternative to positioners for Safety Instrumented System (SIS) applications.
Exida confirmed the D-Epic is suitable for Safety Integrity Level 3 (SIL3) service by performing a FMEDA with calculated PFD and SFF values.
Unlike conventional position transmitters, the D-Epic senses valve position without the need for linkages, levers, or rotary and linear seals.
Position sensing is performed by noncontact means via the use of an integrated Hall effect sensor and magnet assembly.
This also allows a remote sensor head assembly to be mounted up to 15m from the electronics enclosure.
Available in low copper content aluminium, 316 stainless steel or engineered resin enclosures, the D-Epic is agency certified for nonincendive CID2 Groups A-G service and explosion-proof CID1 Groups B-D service with the MOD3 or 360/366 enclosures.
The D-Epic control transmitter is easy to set up, and calibration is via a local, nonintrusive interface and integrated LCD or Hart communicator.
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