Heat Tracing Sales Mt. Airy, Maryland www.heattracingsales.com 410-795-2223 PDS SRL Self-Regulating Low Temperature Heating Cable Maintains up to Output 150°F Withstands up to 185°F • Self-Regulating, Energy Efficient Cut to Any Length in Field • 16 AWG Buss Wire Can be Single Overlapped Temperature Low Temperature Self Regulating Description • Circuit Lengths to 660 Feet • Process Temperature Maintenance to 150°F (65°C) • Maximum Continuous Exposure Temperature (Power Off) 185°F (85°C) • Industrial Freeze Protection Applications • Freeze Protection of Fire Protection System Piping Chromalox SRL self-regulating heating cable provides safe, reliable heat tracing for freeze protection of pipes, valves, tanks and similar applications. Constructed of industrial grade 16 AWG buss wire with a tinned copper braid and optional overjacketing, SRL ensures operating integrity in Div. 2 hazardous environments as well as certain corrosive industrial environments. SRL heating cable has a maximum maintenance temperature rating of 150°F (65°C). Features • Energy efficient, self-regulating SRL uses less energy when less heat is required. • Easy to install, SRL can be cut to any length (up to maximum circuit length) in the field. • Field Splicing Without Disrupting Heat Output • 3, 5, 8 and 10 Watts per Foot • Field splices can be performed easily in minutes with no scrap or wasted cold sections. • SRL features lower installed cost than steam tracing, less maintenance expense, and less downtime. • SRL can be single overlapped without burnout, which simplifies heat tracing of in-line process equipment such as valves, elbows and pumps. • Because SRL is self-regulating, overtemperature conditions are virtually impossible. • Chromalox termination, splice, tee and end seal kits reduce installation time. • UL listed for use on fire protection System piping • 120 and 208-277 Volts Available From Stock • Approximate Size 3/8" x 1/8" • Minimum Bend Radius is 1-1/8" ® ® PRECISION HEAT AND CONTROL PH: 1-888-996-9258 • FX: 615-793-3563 www.chromalox.com Heat Tracing Sales Mt. Airy, Maryland www.heattracingsales.com © 2004 Chromalox, Inc. 410-795-2223 Heat Tracing Sales Mt. Airy, Maryland www.heattracingsales.com 410-795-2223 SRL — Self-Regulating Low Temperature Heating Cable Construction Twin 16 AWG Copper Buss Wires .................. Provide reliable electrical current capability. Semiconductive Polymer Core Matrix ............................................................. “Self-Regulating” component of the cable, its electrical resistance varies with temperature. As process temperature drops, the core’s heat output increases; as process temperature rises, the heat output decreases. Water Resistant Polyolefin Jacket ................................................... Flame retardant, electrically insulates the matrix and buss wires and provides resistance to water and some inorganic chemical solutions. Tinned Copper Braid ........................................... Provides additional mechanical protection in any environment, and a positive ground path. High Temperature Fluoropolymer or TPR Overjacket ................... Corrosion resistant, flame retardant (Optional) overjacket is highly effective in many environments. TPR coatings protect against certain inorganic chemical solutions. Fluoropolymer coatings are used for exposure to organic or corrosive solutions. These coatings also protect against abrasion and impact damage. Approvals FM - Factory Mutual approved for ordinary areas. UL Listed, CSA Certified for ordinary areas. UL Listed for fire protection system piping FM approved for hazardous (classified) areas when used with Chromalox accessories: • Class I, Div. 2, Groups B, C, D (gases, vapors) • Class II, Div. 2, Groups F, G (combustible dust) • Class III, Div. 2 (easily ignitable fibers and filings) • 3 Watt rated T6 temperature class • 5 and 8 Watt rated T5 temperature class • 10 Watt rated T4A temperature class CSA Certified for hazardous (classified) areas when used with Chromalox accessories: • Class I, Div. 2, Groups A, B, C, D; • Class II, Div. 2, Groups F, G Applications • • • • 2 Process Temperature Maintenance Freeze Protection of Pipes Freeze Protection of Fire Protection System Piping Fluid Flow and Viscosity Maintenance Chromalox ®® • 1382 Heil Quaker Blvd. • LaVergne, TN 37086 • PH: 1-800-443-2640 • FX: 615-793-3563 • www.chromalox.com Heat Tracing Sales Mt. Airy, Maryland www.heattracingsales.com 410-795-2223 Heat Tracing Sales Mt. Airy, Maryland www.heattracingsales.com 410-795-2223 Self-Regulating Low Temperature Heating Cable – SRL Heating Cable System Design 1. Calculate Heat Loss Using the Chromalox Design Guide (PJ 304) for Heat Tracing, calculate the heat loss of the system. To calculate the heat loss (Watts) you will need to know pipe diameter, insulation type and thickness, minimum ambient temperature and the pipe maintenance temperature. 2. Select Cable Rating After calculating the heat loss in the pipe and adjusting for any application deviations, you may determine which cable rating to choose. Using the SRL Thermal Output Ratings graph, select the lowest cable rating that will provide the pipe maintenance temperature. Adjust the cable output for line voltage if necessary. See figures from output wattage at alternative voltages table on page 5. Thermal Output Ratings On Insulated Metal Pipe 14 13 12 11 10W / Ft 10 Heat Output (W/Ft.) 9 8W / Ft 8 7 5W / Ft 6 5 3W / Ft 4 3 2 Cable Output vs. T Temper ature r 1 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 Pipe T Temperrature (°F) Chromalox ® • 1382 Heil Quaker Blvd. • LaVergne, TN 37086 • PH: 1-800-443-2640 • FX: 615-793-3563 • www.chromalox.com Heat Tracing Sales Mt. Airy, Maryland www.heattracingsales.com 410-795-2223 3 Heat Tracing Sales Mt. Airy, Maryland www.heattracingsales.com 410-795-2223 SRL — Self-Regulating Low Temperature Heating Cable 3. Determine Total Cable Length In addition to the system piping, in-line equipment such as valves, flanges and pipe supports require additional heat tracing to maintain the system operating temperatures. Total feet of traced pipe + Cable allowance for components = Total cable length Component Cable Allowances Component Cable Allowance (Ft.) Flange Pair Pipe Support Butterfly Valve Ball Valve Globe Valve Gate Valve 1.5 2.0 2.5 2.7 4.0 5.0 # of Components x x x x x x Total Additional Cable = = = = = = If spiral wrapping or multiple runs of cable are being used, adjust the allowance by multiplying by the wrapping factor or the number of runs being used on the pipe. Guidelines for tracing tanks and vessels are also given in the Chromalox Design Guide (PJ304). 4. Determine Circuits/Circuit Protection Circuit protection depends on the breaker size being used and the start-up temperature. The National Electric Code (NEC 1999) requires the use of ground fault protection breakers for heating cable. The following chart shows the maximum circuit length for a given breaker rating. To determine the number of circuits required for each pipe, divide the total cable (circuit) length found in Step 3 by the maximum circuit length found in the chart. Round up to the next higher number. Number of Circuits = Heater Length Maximum Circuit Length Maximum Circuit Length (Ft.) by Start-up Temperature (°F) and Breaker Size (Amps) Cable Rating 50°F Start-Up (Ft.) 0°F Start-Up (Ft.) -20°F Start-Up (Ft.) Circuit Breaker 10 A 15 A 20 A 25 A 30 A 40 A Circuit Breaker 10 A 15 A 20 A 25 A 30 A 40 A Circuit Breaker 10 A 15 A 20 A 25 A 30 A 40 A SRL3-1C SRL3-2C 205 400 305 600 360 660 NR NR NR NR NR NR 135 275 200 415 270 555 330 660 360 NR NR NR 120 245 185 370 245 495 300 600 360 660 NR NR SRL5-1C SRL5-2C 125 250 185 375 250 505 270 540 NR NR NR NR 90 180 135 270 180 360 225 450 270 540 NR NR 80 160 120 245 160 325 205 405 245 490 270 540 SRL8-1C SRL8-2C 100 185 150 285 200 375 215 420 NR NR NR NR 70 135 110 200 145 265 180 335 215 395 NR 420 65 120 100 175 130 235 165 300 200 350 210 420 SRL10-1C SRL10-2C 60 100 95 160 130 210 160 260 180 315 NR 360 50 80 80 125 105 170 130 210 155 255 180 340 45 75 70 120 95 160 120 195 140 240 180 320 *Thermal magnetic circuit breakers are recommended since magnetic circuit breakers could “nuisance trip” at low temperature. NR = Not Required. Maximum circuit length has been reached in a smaller breaker size. 4 Chromalox ®® • 1382 Heil Quaker Blvd. • LaVergne, TN 37086 • PH: 1-800-443-2640 • FX: 615-793-3563 • www.chromalox.com Heat Tracing Sales Mt. Airy, Maryland www.heattracingsales.com 410-795-2223 Heat Tracing Sales Mt. Airy, Maryland www.heattracingsales.com 410-795-2223 Self-Regulating Low Temperature Heating Cable – SRL Specifications Cable Ratings Output @ 50°F (W/Ft.) Nominal Voltage (Vac) Maximum Circuit Length* (Ft.) SRL3-1C SRL3-2C 3 3 120 208-277 360 660 SRL5-1C SRL5-2C 5 5 120 208-277 270 540 SRL8-1C SRL8-2C 8 8 120 208-277 215 420 SRL10-1C SRL10-2C 10 10 120 208-277 180 360 Model Number *See chart on page 4 for maximum circuit lengths by start-up temperature and circuit breaker size Output Wattage at Alternate Voltages (50°F) W/Ft. Cable Rating 208 Volts % Change In Output 220 Volts % Change In Output 277 Volts % Change In Output 2.4 4.1 6.88 8.7 -20 -18 -14 -13 2.6 4.5 7.28 9.2 -13 -10 -9 -8 3.4 5.6 8.96 11.1 +15 +13 +12 +10 SRL3 SRL5 SRL8 SRL10 Ordering Information Output (W/Ft.) Voltage (Vac) Model Number PCN 3 120 SRL3 - 1C SRL3 - 1CR SRL3 - 1CT 382678 382731 383400 208-277 SRL3 - 2C SRL3 - 2CR SRL3 - 2CT 382686 382740 383419 120 SRL5 - 1C SRL5 - 1CR SRL5 - 1CT 382694 382758 383443 208-277 SRL5 - 2C SRL5 - 2CR SRL5 - 2CT 382707 382766 383451 5 Output (W/Ft.) Voltage (Vac) Model Number PCN 8 120 SRL8 - 1C SRL8 - 1CR SRL8 - 1CT 382555 382598 383460 208-277 SRL8 - 2C SRL8 - 2CR SRL8 - 2CT 382563 382600 383478 120 SRL10 - 1C SRL10 - 1CR SRL10 - 1CT 382820 382846 383486 208-277 SRL10 - 2C SRL10 - 2CR SRL10 - 2CT 382838 382854 383494 10 To Order: Specify length, Model Number, PCN and Installation Accessories. Chromalox ® • 1382 Heil Quaker Blvd. • LaVergne, TN 37086 • PH: 1-800-443-2640 • FX: 615-793-3563 • www.chromalox.com Heat Tracing Sales Mt. Airy, Maryland www.heattracingsales.com 410-795-2223 5 Heat Tracing Sales Mt. Airy, Maryland www.heattracingsales.com 410-795-2223 SRL — Self-Regulating Low Temperature Heating Cable Model Numbers SRL 5 - 1 C T Overcoat Options T = Fluoropolymer corrosion resistant overjacket over braid for hostile/ corrosive environments R = TPR overjacket over braid for protection against certain inorganic chemical solutions Braid C = Standard tinned-copper metallic braid for ground path Voltage 1 = 120 Volts 2 = 208-277 Volts Output (watts) 3, 5, 8, 10 Watts per Foot SRL Self-Regulating, Low Temperature Heating Cable Accessories Chromalox has a complete line of accessories specifically designed for use with SRL cable. Use only Chromalox accessories to ensure the performance of the heat trace system. Thermostat Model Description RTAS DL Series air-sensing thermostat with Microswitch® for local control of circuit. DL Series pipewall-sensing thermostat with Microswitch® for local control of circuit. DL Series power connection set kit. DL Series splice and tee set kit. DL Series end seal kit. RTBC Power Connection RTPC RTST RTES Pipe Straps PS-1, PS-3, PS-10 Pipe straps to affix thermostat and power connection splice kits to pipes. Fiberglass Tape FT-2 Tape to affix cable to pipe, 66' x 1/2" roll, install on 12" centers. Aluminum Tape AT-1 Tape to aid heat transfer, 180 foot roll. Apply over cable along entire length of circuit. Caution Labels CL-1 “Electrical Heat Tracing” caution labels, 5 per package. Install every 10 feet. Control Panels Contact your Chromalox representative for Control Panel information. Note - For PCN's, refer to the DL Series connection system accessories product data sheet. 6 Chromalox PJ320-2 PDS SRL APRIL 04 ®® • 1382 Heil Quaker Blvd. • LaVergne, TN 37086 • PH: 1-800-443-2640 • FX: 615-793-3563 • www.chromalox.com Heat Tracing Sales Mt. Airy, Maryland www.heattracingsales.com 410-795-2223
* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project
advertisement
© 2021