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Shematic of conventional hydraulic BOP<br />
<strong>control</strong> (KOOMEY)<br />
Each ram pair or annular preventer are <strong>control</strong>led through one <strong>control</strong><br />
valve.<br />
Pneumatic pressure transmitters (9,10,11) and air regulators for<br />
pneumatic pressure transmitters (12, 13, 14) enable the calibration of<br />
panel gauge to hydraulic pressure gauge on the unit.