Fisher DVC6000 SIS Digital Valve Controller
FIELDVUE digital valve controllers installed on emergency shutdown valves offer state-of-the-art testing methods. Using HART communication, the 375 Field Communicator or ValveLink Software replace the function of the pneumatic test panel to verify operation of the emergency shutdown valve. The results are improved system performance and valve diagnostic capability along with a reduction in testing time and initial investment cost.
Partial stroke testing – This test checks for valve movement without fully stroking the valve. Many applications will allow 10% movements to verify valve response without upsetting the critical process line. Diagnostic data is collected and an alert is given if the valve is stuck. Step response test – This test analyzes overshoot, hysteresis, dead time, and stroking time. Valve signature test – This test can be used to benchmark valve performance by identifying friction, spring rate, seating forces and bench set.Automatic testing – A scheduling and batch running tool within ValveLink Software can be used to automate multiple diagnostic tests.
Supply Pressure
Minimum Recommended: 0.3 bar(5 psig), higher than minimum actuator requirements
Miximum: 10.0 bar(145 psig) or maximum pressure rating rating of actuator, which ever is lower
Supply Medium
Air: supply pressure must be clean,dry air that meets the requirements of IsA Standard 7.0.01.
Natural gas: natural gas must be clean, dry, oil-free, and noncorrosive. H2S content should not exceed 20 ppm.
Connections
supply Pressure: 1/4 NPT internal and intergral pad for mounting 67CFR regulator
Output pressure: 1/4 NPT internal
Tbing: 3/8-inch, recommended
Vent(pipe-away): 3/8NPT internal
Electrical: 1/2 NPT internal conduit connection.
Fisher DVC6000 SIS Digital Valve Controller