•
Field test connection
• In-service verification of set pressure.
• Simplifies the periodic testing of safety valves.
Trillium Flow Technologies
TM
pilot operated safety valves may be readily tested for verification of set pressure during normal
system operation with this option. Its connection is 1/4” NPT. The customer furnishes a pressure source,
plus a pressure-reducing valve and a test gauge for the portable field testing system.
When test pressure is slowly admitted through a pressure-reducing valve Sarasin-RSBD
TM
recommends
to increase the pressure up to 80-90% of set pressure and then increase the pressure with a gradient
around 0.1 Set pressure/sec, the pilot and the main valve dome are pressurized, simulating an
increased system pressure. When set pressure is reached, the pilot will actuate.
This actuation pressure may then be compared with the nameplate value. Depending upon the current
system pressure, and the characteristics of the specific pilot, the main valve may also briefly open and
close, or partially open and close, providing verification that the main valve piston is free to move.
! Pay attention to connect the field test
connection correctly!
Test gauge
Pressure-reducing
Pressure source
74LP PRESSURE RELIEF VALVE
SARASIN-RSBD
™
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