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Propane Regulator of Biosafety Cabinet See Also: Equipment List USE CAUTION !! Turn blower on and open the glass panel of the biological safety cabinet before preceding. Also; check that the petcock (valve 3) is off. Check hoses inside and outside of cabinet. Make sure that valve #1 is "decreased" completely, i.e. unscrewed upwards (counter clockwise) untill loose. Slowly turn on main cylinder valve #2, until it is completely open. Slowly 'increase' valve #1 until the low pressure gauge (#4) reads 4psi. Slowly open petcock(valve #3, inside biological safety cabinet) while igniting the propane flame. TO TURN CYLINDER OFF: Shut off main cylinder (#2) completely while flame is on, i.e. petcock is open. Allow all pressure gauges to go to zero. 'Decrease" valve #1. Close petcock (valve #3) completely. TOP Bio-Link.org Web: www.Bio-Link.org Email: info@Bio-Link.org NSF Award #9850325