API-RP-576

6.2.14 Reassembly of Valve
it should be reassembled in accordance with the manufacturer’s
instructions.
• The nozzle and disk seating surfaces should not be oiled.
• The spring should be adjusted to pop at set pressure.
• Blowdown rings should be set in accordance with the manufacture’s
recommendations for the appropriate vapor or liquid service.
• the blowdown settings should be noted for future reference.
Most test blocks do not have enough capacity to measure the actual
blowdown, manufacturer’s recommendations and past performance
should be evaluated to estimate any necessary adjustment.
Fion Zhang/ Charlie Chong