Walchem EH Series, Инструкция по эксплуатации

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10
2.3 Supply Tubing
The supply tubing run should be as short as possible. For flooded suction
mounting, install a shut-off valve with an appropriate tubing connector at the
tank outlet. Cut a length of tubing from the coil supplied and install between the
shut-off valve and the pump inlet fitting. For suction lift applications, slide on
the ceramic weight, then install a foot valve on one end of suction tubing. Cut the
tubing to a length such that the foot valve hangs vertically about 1 in (25mm)
above the bottom of the tank. Avoid any loops in the tubing run that could form
a vapor trap. Running the tubing through a length of pipe will help to keep tubing
straight. Total vertical suction lift should be no more than 5ft. (1.5m).
Reference Figure 4.
Attach tubing as shown in Figure 5. First slide the coupling nut, small end first,
onto the tubing. Push the tubing over the valve housing tip
all the way to the
valve housing shoulder . (Tip: if the tubing is stiff from cold, dip the tubing end
in hot tap water for a few minutes so it will slide on and flare out more easily.
Push the coupling nut onto the threads. Apply some pressure on the coupling nut
and tubing while tightening the nut, making sure the tubing has not backed off of
the shoulder of the valve housing.
WARNING: All fittings and coupling nuts should be tightened by hand only. If
necessary, a small tool may be used to make it snug. DO NOT use excessive
force or large wrenches.
The coupling nut should not bottom out completely against the fitting. If this
happens during connection, either the tubing has slid down the shoulder while
tightening, or the tubing has been pinched. Remove the coupling nut, re-cut the
tubing and re-connect.
WARNING : If there is any leakage around the coupling nut and it appears to
have been installed correctly, DO NOT TIGHTEN the coupling further! Release
pressure in the line, disconnect tubing, re-cut and re-connect. Tightening of
misinstalled tubing may cause the tubing to pop off under pressure.
Figure 5 Attach Tubing
Valve
H ousing
Shoulder
C oupling N ut
Tubing