Grain Systems PNEG-1798 - Manual (Page 18)

7. Procedure
18 PNEG-1798 Tower and T-Series Dryers Vaporizer
7.3. Vaporizer Coil and Piping Installation
Information
The vaporizer coil is a very heavy piece of equipment; care should be taken in positioning it for mounting
and the actual mounting process. The coil consists of four (4) coils with an inlet opening for the liquid
propane and an outlet or discharge opening for the ‘vaporized’ heated propane gas. The vaporizer coil
assembly is constructed of 1-1/4" SCH 80 thick walled continuous black iron tubing and has two (2)
1-1/4" male NPT threaded ends.
The ‘inlet’ for the vaporizer is the bottom of the coil assembly and the ‘outlet’ is the top tube of the vaporizer
coil assembly.
(See Figure 7R on Page 24.)
The coil assembly itself is supported by the bracket assembly pieces of Figure 7G and Figure 7H on
Page 17 . These pieces are bolted together in a vertical position and then bolted in four (4) equidistant
quadrants of the inside burner can or burner housing assembly. These four (4) brackets will support the
entire set of coils above the burner. The right angle piece of the bracket with four (4) holes is bolted to the
burner can assembly in a vertical position while the other right angle end with seventeen (17) holes is for
the 1-1/4" U-bolts to capture the outside edge of the coil assembly against the bracket. The slots allow for
the brackets to spread apart and butt against the coils.
Figure 7I “Vaporizer Coil” that has not been Mounted above the Burner (Shipped Position)
CAUTION
All threaded pipe fittings must be screwed tightly to prevent leaking. Industrial
grade pipe thread compound with PTFE and/or teflon tape in combination with the
thread compound shall be used and liberally applied to all threaded fittings. Large
pipe wrenches (24" and 36") must be used to get the needed torque for tightening
the fittings. Due to limited access to some spaces, piping pieces may need to be
fabricated on the ground and then installed where a pipe wrench can be fully
utilized for tightening.