Installation Instructions

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*Table includes losses for four 90 degree bends and two (2) end fittings. Tubing runs with larger numbers of bends and/or fitting shall be increased by an equivalent length of
tubing according to the following formula:
L = 1.3 (n) L = is the additional length (ft.) of tubing to be added to actual run. n = is the number of additional fittings and/or bends.
Note: Table 7 does include the effects of pressure drop across the line regulator. If regulator pressure drop exceeds 1 psig across 325-3 or 325-5A regulators, DO NOT USE
THIS TABLE. Consult with Tru-Flex Metal Hose Corp. for guidance.
Caution: Capacities shown in Table 7 may exceed maximum capacity of the regulator. With a 1.5 psig regulator inlet pressure and a 1 psig pressure drop across the regula-
tor, the maximum flow capacity of a single 325-3 is 298 CFH while the 325-5A is 695 CFH. The use of multiple parallel regulators may be required if permitted by local code.
CAPACITY TABLES OF CSST – TABLE 7 Maximum Capacity of Pro-Flex
®
CSST in Cubic Feet per Hour of Gas Gas Pressure: 5 psig Pressure Drop: 3.5 psig (Based on a 0.6 Specific Gravity Gas)
Tubing Length (feet)
Tube Size (EHD) 10 25 30 40 50 75 80 100 150 200 250 300 400 500 3/8” 15 617 392 359 311 279 228 221 198 162 140 126 115 99 89 1/2” 18 828 537 493 430 387 319 310 279 230 201 180 166 144 130 3/4” 25 2783 1761 1608 1393 1245 1017 985 881 719 623 557 508 440 394 1” 31 8228 4912 4433 3770 3325 2647 2552 2251 1791 1524 1344 1213 1031 909 1
1
/4” 37 9452 5967 5445 4713 4213 3437 3328 2975 2427 2101 1878 1714 1483 1326
NATURAL GAS Locate proper sizing table based on total pressure drop allowed in piping system by local utility for each installation.