Fig 23. Charging two pressure tanks, using charging and filling lines, and cylinders of compressed air or nitrogen.
(b) Place the cylinders side by side with both outlets facing in the same direction. (If the ground is not level enough for the cylinders to stand up side by side, lay them horizontally with both outlets face up.)
(c) Before attaching the filling line to the cylinders, blow out dust. ([Par 33]) Then connect, using wrenches to make the joints pressure tight. Do not kink or bend the flexible hose. Cylinders must be close enough together to prevent strain on the flexible hose.
(d) Attach a charging line to each of the two couplings on the filling line.
(6) Attaching charging lines to pressure tanks.
(a) Close pressure-tank valves.
(b) Unscrew caps from check valves.