Double Wall Tube Heat Exchangers
A double wall unit consists of regular "U" Tube heads and shells. The conversion to a double wall unit requires a tube bundle with double wall tubing and tube sheets. Sizes are 4" to 26" diameter with lengths 24" to 120". All standards and options available for heads and shells can be applied to a double wall unit. The following are the options available for a double wall tube bundle.
Tube Sheets
Carbon steel (standard)
304 or 316 stainless steel (optional)
Double Wall Tubing
.040" Copper inner tube .062" Copper outer tube (standard)
.040" 90/10 Cupro-Nickel inner tube .040" 90/10 Cupro-Nickel outer tube (optional) Tank Heater Units
Tank heater unit sizes are 4" to 20" diameter with 24" to 120" lengths. Standard tank heaters are constructed in accordance to ASME requirements for the same pressure and temperature ratings as the "U" Tube Heat Exchangers. A Manufacturer's Data Report for Pressure Vessels Form No. U-1 is available upon request.
All options available for "U" tube heat exchangers can be applied to tank heaters. |
Type
- Steam to Water (2 or 4 Pass)
- Water to Water (2 or 4 Pass)
Sizes
- 4" to 26" diameter
- 2' to 10' length
Materials (Tubeside)
- Heads 4" to 20" cast iron, 22" to 26" fabricated steel
- Tube sheets 4" to 26" carbon steel
- Tubing 3/4" copper .035 wall thickness
- Steel baffles
Materials (Shellside)
- Carbon steel pipe with ANSI flanges
Operating Pressures (Tubeside)
- 150 psig working pressure 4" to 12" diameter with cast iron head
- 125 psig working pressure 10" to 12" diameter with 2 pass 4" NPT cast iron head
- 125 psig working pressure 14" to 20" diameter with cast iron head
- 150 psig working pressure 20" to 26" diameter with fabricated steel head
Operating Temperature (Tubeside)
- 375°F maximum operating temperature 4" to 26" cast iron or fabricated heads
Operating Pressures (Shellside)
- 150 psig working pressure carbon steel construction (All sizes)
Operating Temperature (Shellside)
- 375°F maximum operating temperature carbon steel construction (All sizes)
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Optional Features |
Materials
Heads
- Cast bronze 4" to 10" (2 or 4 Pass)
- Cast stainless steel 4" to 10" (2 or 4 Pass)
- Fabricated 300 series stainless steel 12" to 20" (2 or 4 Pass)
- Fabricated steel 4" to 20" (2 or 4 Pass)
Tubesheets
- Cast bronze 4" to 12" (2 or 4 Pass)
- Brass plate 14" to 18" (2 or 4 Pass)
- Type 304 stainless steel 4" to 20" (2 or 4 Pass)
- Type 316 stainless steel 4" to 20" (2 or 4 Pass)
Baffles
- Brass 4" to 20"
- Class 300 stainless steel 4" to 20"
Shell
- Series 300 stainless steel
Operating Pressure and Temperature
Heads
- 4"-8" Billet head (2 or 4 Pass) 400 psig @ 400°F
- 10"-16" Bonnet head (2 or 4 Pass) 400 psig @ 400°F
- 18"-26" Bonnet head (2 or 4 Pass) 300 psig @ 400°F
Shells
- 4"-16" Water to Water 400 psig @ 400°F
- 18"-26" Water to Water 300 psig @ 400°F
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Since 1923, Thrush's leadership in the hydronics industry has gone beyond product quality to include responsive customer service and on-time delivery.
Thrush heat exchangers are constructed from a wide variety of materials under an approved quality control program in accordance with the National Board of Boiler and Pressure Vessel Inspectors. Each unit is manufactured, tested, and "U" stamped to ASME Code requirements under Section VIII Division 1 and registered with the National Board of Boiler and Pressure Vessel Inspectors. In addition, a Manufacturer's Data Report for Pressure Vessels Form No. U-1 is provided with every unit. |
Type
Steam to water
Models
120, 150, 180, 260, 320 & 380
Materials (Tubeside)
Front head cast iron
Rear head cast iron
Tubing 3/4" copper .035 wall thickness
Materials (Shellside)
Tube sheets carbon steel
Shell carbon steel pipe
Operating Pressures (Tubeside)
125 psig working pressure
Operating Pressures (Shellside)
125 psig working pressure
Operating Temperature (Tubeside)
295°F
Operating Temperature (Shellside)
295°F
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| Optional Features |
Heads
Cast stainless steel (Models 260, 320, 380 only)
Material |
Thickness |
18 Ga. Copper
90/10 CU/NI
Carbon Steel
304 Stainless |
.049
.049
.065
.049 |
Shell
Series 300 stainless steel (Models 260, 320, 380 only) |
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