CVI TRUNNION MOUNTED BALL VALVE TEST PROCEDURE

HYDROSTATIC SEAL TEST    API6D 10.3 and 10.4
Sequence Area Pressure Duration(min) Description
SHELL
TEST
A 1.5x PN 6″ – 10″ 5 1. Valve in partial open.
2. Set the pressure to 150% PN.
3. Reduce the pressure to 50% PN.
4. Reset the pressure to 150% PN.
5. Hold the pressure for the duration of testing.
B 1.5x PN 12″- 18″ 15
C 1.5x PN 20″ – 60″ 30
SEAT
TEST
A 1.1xPN 5 Seat hydro seal test at A
end toawrds body B
B Atmospheric
C Atmospheric
A Atmospheric 5 Seat hydro seal test at C
end toawrds body B
B Atmospheric
C 1.1xPN
A 1.1xPN 5 Seat hydro seal test for both A and C
DBB
B Atmospheric
C 1.1xPN
ARI SEAL TEST API6D 10.4
SEAT
TEST
A Atmospheric 5 Seat air seal test at A
end toawrds body B
B Atmospheric
C 80PSIG(5.5bar)
A 80PSIG(5.5bar) 5 Seat air seal test at C
end toawrds body B
B 80PSIG(5.5bar)
C Atmospheric

PN= Nominal Pressure     Blue=Liquid     Yellow=Air

 

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