The Model D Heat Exchanger

QVF's newest heat exchanger, the Model D, offers a roster of capabilities to meet high-corrosion, high-pressure, full-vacuum, high-temperature process needs effectively. It can cope with the most stringent demands for product purity, process versatility and ease of maintenance.

At the heart of its toughness and versatility is a steel-reinforced, glass-filled TFE tube sheet. The tube sheet underlies the Model D's differential pressure capability of 90 psig with process temperatures in excess of 300oF.

It is available in models ranging from 40 to 505 sq. ft. of heat transfer. Stock units are equipped with a carbon steel shell, glass tubes, PTFE baffles, steel reinforced PTFE tubesheet, and individual tube seals. Single-, double-, or triple- pass designs are available. Bonnets and other tube materials can be provided to customer specifications.

THE MODEL D SEALlNG MECHANlSM


The Model D features individual tube seals. By tightening the PTFE bushing the "O" ring is compressed forming the tube seal. This allows an extremely reliable seal and simple replacement or plugging of tubes from the end.

Single-Pass/Horizontal Mount

Catalog
Reference		 MDH
6/40		 MDH
6/68		 MDH
8/68		 MDH
8/91		 MDH
8/110		 MDH
10/138		 MDH
10/168		 MDH
12/230		 MDH
12/280		 MDH
18/315		 MDH
18/505
L                        (in.) 101 1/4 160 5/16 101 13/16 133 5/16 160 7/8 133 5/16 160 7/8 133 5/16 160 7/8 103 162 1/8
L1                      (in.) 23 3/4 37 3/4 24 31 38 31 38 31 38 29 7/8 38 5/8
L2                      (in.) 53 13/16 84 7/8 53 13/16 71 5/16 84 7/8 71 5/16 84 7/8 71 5/16 84 7/8 43 1/4 84 7/8
L3                      (in.) 8 5/16 9 5/8 10 1/2 10 1/2 19 1/4
L4                      (in.) 8 9 12 12 15 1/2
L5                      (in.) 7 1/2 8 1/2 11 1/2 11 1/2 15
L6                      (in.) 6 6 1/2 10 10 16
L7                      (in.) 3 3 1/2 6 6 12
L8                      (in.) 1 1/2 1 3/4 3 3 6
L9                      (in.) 2 2 2 2 3
L10                    (in.) 4 4 4 4 6
L11                    (in.) 1/2 1/2 1/2 1/2 1/2
DN                    (in.) 6 8 10 12 18
DN1                  (in.) 2 3 4 4 6
DN2                  (in.) 3/4 3/4 3/4 3/4 3/4
DN3                  (in.) 3/4 3/4 1 1 1
Heat Ttransfer Area ft2 40 68 68 91 110 138 168 230 280 315 505
Tube Length (in.) 99 158 99 130 1/2 158 130 1/2 158 130 1/2 158 99 158
Tube Length (mm) 2515 4015 2515 3315 4015 3315 4015 3315 4015 2515 4015
Baffle Spacing (in.) 5 1/2 5 6 6 1/4 6 1/4 8 8 3/4 8 7 11/16 18 1/4 16 1/2
Number of Baffles 16 30 14 18 24 14 16 14 18 4 8
Number of Tubes 36 36 60 60 60 90 90 150 150 276 276
Outside Diam. Tubes (mm) 14 14 14 14 14
Wall Thickness of Tubes (mm) 1.5 1.5 1.5 1.5 1.5
Maximum Oper. Temp oF 350 350 350 350 300
Maximum Thermal Shock oF 162 162 162 162 162
Maximum Oper. Pressure psig 75 75 75 75 60

Single-Pass/Vertical Mount

Catalog
Reference		 MDV
6/40		 MDV
6/68		 MDV
8/68		 MDV
8/91		 MDV
8/110		 MDV
10/138		 MDV
10/168		 MDV
12/230		 MDV
12/280		 MDV
18/315		 MDV
18/505
L                        (in.) 101 1/4 160 5/16 101 13/16 133 5/16 160 7/8 133 5/16 160 7/8 133 5/16 160 7/8 103 162 1/8
L1                      (in.) 31 3/4 51 3/4 32 42 52 42 52 42 52 35 5/8 55 1/8
L1                      (in.) 8 5/16 9 5/8 10 1/2 10 1/2 19 1/4
L3                      (in.) 8 1/4 8 7/8 10 1/2 12 1/2 16
L4                      (in.) 7 1/2 8 1/2 11 1/2 11 1/2 15
L5                      (in.) 3 1/2 4 4 4 6
L6                      (in.) 1 1 1 1 1
DN                    (in.) 6 8 10 12 18
DN1                  (in.) 2 3 4 4 6
DN2                  (in.) 3/4 3/4 3/4 3/4 3/4
DN3                  (in.) 1 1 1 1 1
Heat Ttransfer Area ft2 40 68 68 91 110 138 168 230 280 315 505
Tube Length (in.) 99 158 99 130 1/2 158 130 1/2 158 130 1/2 158 99 158
Tube Length (mm) 2515 4015 2515 3315 4015 3315 4015 3315 4015 2515 4015
Baffle Spacing (in.) 5 1/2 5 6 6 1/4 6 1/4 8 8 3/4 8 7 11/16 18 1/4 16 1/2
Number of Baffles 16 30 14 18 24 14 16 14 18 4 8
Number of Tubes 36 36 60 60 60 90 90 150 150 276 276
Outside Diam. Tubes (mm) 14 14 14 14 14
Wall Thickness of Tubes (mm) 1.5 1.5 1.5 1.5 1.5
Maximum Oper. Temp oF 350 350 350 350 300
Maximum Thermal Shock oF 162 162 162 162 162
Maximum Oper. Pressure psig 75 75 75 75 60

Triple-Pass/Horizontal Mount

Catalog
Reference		 MDT
6/40		 MDT
6/68		 MDT
8/68		 MDT
8/91		 MDT
8/110		 MDT
10/138		 MDT
10/168		 MDT
12/230		 MDT
12/280		 MDT
18/315		 MDT
18/505
L                        (in.) 112 9/16 171 5/8 112 9/16 144 1/16 171 5/8 144 9/16 172 1/8 144 9/16 172 1/8 115 3/4 174 7/8
L1                      (in.) 29 3/8 43 3/8 29 3/8 36 3/8 43 3/8 36 5/8 43 5/8 36 5/8 43 5/8 36 1/4 44 5/8
L2                      (in.) 53 13/16 84 7/8 53 13/16 71 5/16 84 7/8 71 5/16 84 7/8 71 5/16 84 7/8 43 1/4 84 7/8
L3                      (in.) 13 11/16 15 16 1/8 16 1/8 25 5/8
L4                      (in.) 8 9 12 12 15 1/2
L5                      (in.) 7 1/2 8 1/2 11 1/2 11 1/2 15
L6                      (in.) 6 6 1/2 10 10 16
L7                      (in.) 3 3 1/2 6 6 12
L8                      (in.) 1 1/2 1 3/4 3 3 6
L9                      (in.) 2 2 2 2 3
L10                    (in.) 4 4 4 4 6
L11                    (in.) 1/2 1/2 1/2 1/2 1/2
DN                    (in.) 1 1/2 2 2 1/2 3 5
DN1 2 3 4 4 6
DN2 3/4 3/4 3/4 3/4 3/4
DN3 3/4 3/4 1 1 1
Heat Ttransfer Area ft2 40 68 68 91 110 138 168 230 280 315 505
Tube Length (in.) 99 158 99 130 1/2 158 130 1/2 158 130 1/2 158 99 158
Tube Length (mm) 2515 4015 2515 3315 4015 3315 4015 3315 4015 2515 4015
Baffle Spacing (in.) 5 1/2 5 6 6 1/4 6 1/4 8 8 3/4 8 7 11/16 18 1/4 16 1/2
Number of Baffles 16 30 14 18 24 14 16 14 18 4 8
Number of Tubes 36 36 60 60 60 90 90 150 150 276 276
Outside Diam. Tubes (mm) 14 14 14 14 14
Wall Thickness of Tubes (mm) 1.5 1.5 1.5 1.5 1.5
Maximum Oper. Temp oF 350 350 350 350 300
Maximum Thermal Shock oF 162 162 162 162 162
Maximum Oper. Pressure psig 75 75 75 75 60

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