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Shell and Tube Heat Exchanger Doyle and Roth
Manufacturing Heat Transfer Equipment Since 1932

Exchanger Selection

Doyle & Roth Standardized Units:
D&R has made preliminary unit sizing easy!
  
Select your configuration below for dimensions tube surface area:
Or Download our Catalogs:
Fixed Tubesheet 
  
"U" Tube 
Heat Exchanger Advantages by Type:
Type of Design
U-Tube 
Fixed Tube Sheet 
Pull Thru Floating Head 
Outside Packed Floating Head Lantern Ring 
Split Ring Floating Head 
Outside Packed Floating Head 
Relative Cost
Lowest
Low
Median
High
Highest
High
Provision for Thermal Expansion
Each tube expands freely
Expansion Joint in shell
Floating Head
Floating Head
Floating Head
Floating Head
Removable Bundle
yes
no
yes
yes
yes
yes
Replacement Bundle
yes
costly
yes
yes
yes
yes
Replacement Tubes
outer rows
yes
yes
yes
yes
yes
Tubeside Cleaning
Chemical
Chemical & Mechanical
Chemical & Mechanical
Chemical & Mechanical
Chemical & Mechanical
Chemical & Mechanical
Shellside Cleaning
Chemical & Mechanical
Chemical
Chemical & Mechanical
Chemical & Mechanical
Chemical & Mechanical
Chemical & Mechanical
Double Tubesheet
available
available
no
no
no
available
Tubeside Passes
even number
any number
any number
one or two
any number
any number
Internal Gaskets
no
no
yes
no
yes
no
TEMA Designation
"U"
"M", "L" or "N"
"T"
"W"
"S"
"P"
D&R Naming Designation:
For convenience of application we have developed several standard designs of fixted tubesheet and U tube exchangers. The naming convention is as follows:

Vapor Condensers:
D & R Model "VT" for tube side condensing; D & R Model "VS" for shell side condensing

Reboilers:
D & R Model "VT"

Heat Exchangers:

D & R Model "LL" for liquid to liquid service; D & R Model "LLS" for steam to liquid sevice

Model numbers of D & R exchangers can be determined easily by assembling a few pertinent factors. The result will generally describe the unit and simplify identification.


Example 1:
D & R Model VS1054-8H reading from left to right describes a Shell Side Condenser with a 10-3/4" O.D. shell, 5/8" O.D. tubes, 4 pass tube side, 8'0" tube length for horizontal installation.

This is determined as follows:

1

2

3

4

5

6

VS

10

5

4

8

H

1. Model "VS" -- Shell Side condensing (from general catagories outlined above)
2. Nominal shell size (10-3/4" O.D.) -- 10
3. Tube dia. in eighths of an inch -- 5 equals 5/8" O.D. tube
4. Tube side pass arrangement -- 4
5. Tube lenght in feet -- 8
6. Horizontal installation -- H


Example 2:
D & R Model LLS 105U4-8H reading from left to right describes a fluid heater with a steam on the shell side and fluid on the tube side. The unit consists of a 10-3/4" shell, 5/8" O.D. U-tubes, 4 pass tube side with a nominal tube bundle length of 8'0" for horizontal installation.

This is determined as follows:

1

2

3

4

5

6

LLS

10

5U

4

8

H

1. Model "LLS" (from general catagories outlined above)
2. Nominal shell size (10-3/4" O.D.) -- 10
3. U-tube diameter in eighths of an inch -- 5U equals 5/8" O.D. U-tube

4. Tube side pass arrangement -- 4
5. Nominal bundle lenght in feet -- 8

6. Horizontal installation -- H