Parker Hannifin Corporation
Parflex Division
Ravenna, Ohio
Bulletin No. 4660-PGP2T
24
Parflex
®
Flexible Gas Piping System
Design and Installation Guide
9. Sizing Section G – Section G supplies the Fourth HVAC Unit. The total load is 225 CFH and the total
length is 75 ft. + 25 ft. + 25 ft. = 125 ft. Referring to Table 11 under the 125 ft. column, we find that 1/2
inch (PGP-8) has capacity above 225CFH (326). Use 1/2 inch (PGP-8) to run Section F.
10. Sizing Section H – Section H supplies the fifth HVAC Unit. The total load is 225 CFH and the total length
is 75ft. + 25 ft. + 25 ft. + 25ft. = 150 ft. Referring to Table 11 under the 150 ft. column, we find that 1/2
inch (PGP-8) has capacity above 225 CFH (299). Use 1/2 inch (PGP-8) to run Section H.
11. Sizing Section I – Section I supplies the last HVAC Unit. The total load is 225 CFH and the total length
is 75 ft. + 25 ft. + 25 ft. + 25 ft. = 150 ft. Referring to Table 11 under the 150 ft. column, we find that 1/2
inch (PGP-8) has capacity above 225 CFH (299). Use 1/2 inch (PGP-8) to run Section I.
Section 3.0 System Configuration & Sizing
3.2.5 Parallel Elevated System Example -
Continued
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