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Dalton Diff-Therm Platen Heater

Diff-Therm® Platen Heaters

For more than 60 years, Diff-Therm heaters have set the standard for long life and high-performance diffusion pump heaters.

Dalton Diff-Therm Platen Heater

Simplify Vacuum Diffusion Pump Heating

The Diff-Therm® Platen Heater reduces the time, labor, and cost of the replacement process by increasing the density and uniformity of the insulation for better heat transfer.

The Diff-Therm®
Platen Heater

Our Dalton Diff-Therm® Heaters are built with high-purity magnesium oxide, nickel chromium resistance wire, and stainless steel internal components. Special filling methods and equipment compact the magnesium oxide tightly inside and around the resistor helix, which is then swaged under 50 tons of pressure to its maximum possible density. The result is very high dielectric strength and efficient internal heat generation. Diff-Therm castings are machined to a smooth, flat finish to ensure efficient and uniform heat conduction into the boiler plate assembly for steady vaporization of the pump fluid.

Dalton Diff-Therm Platen Heater

Direct Replacement Heaters for Every Major Brand of Vacuum Diffusion Pump

  • Cooke
  • CVC
  • Denton
  • Edwards
  • Leybold
  • NRC
  • Perkin Elmer
  • Torr
  • Varian
  • Veeco

Advantages

Diff-Therm® platen heaters solve the problem of short lived OEM diffusion pump heaters. The unique design maximizes heat transfer through the boiler plate to generate maximum vacuum fast and reliably. Invest in the future of your pumps today and unlock the true potential of your vacuum system.

  • Outperform Original Equipment Heaters
  • One-Piece Assembly Simplifies Installation
  • Outperform Conventional Heaters

Outperform Original Equipment Heaters

Our unique swaged assembly provides increased dielectric density for better heat transfer and longer heat life. Here are a few of the benefits:

  • “Full power” heaters that produce 20% more heat than OEM heaters.
  • Flat, smooth platen surface assures uniform, efficient heat transfer.
  • Increases pump throughout and higher vacuum system processing rates.

One-Piece Assembly Simplifies Installation

Our one-piece assembly makes it easier and faster to install than a conventional tubular/crush plate system. Proper alignment will also never be an issue.

Diff-Therm One-Piece Construction


The one-piece Diff-Therm assembly simply bolts to the bottom of the boiler plate, replacing the tubular heater, crush plate, and clamping plate thus eliminating the complicated alignment process. Compared with the limited contact area (one side of the tubular element) of conventional designs, the flat surface of the Diff-Therm platen provides greater contact area for more effective heat transfer to the boiler plate.

Conventional Crush Plate Assembly

Outperform Conventional Heaters

Dalton’s Watt-Flex® Split-Sheath Cartridge Heaters have been shown to outperform conventional heaters:

  • Split-sheath design expands when energized for better heat transfer, especially in oversized bores.
  • Warranted removal: heater contracts when de-energized for easy removal.

Interested in learning more? Give us a call today!

Specifications

Diff-Therm® Platen Heaters are high-quality tubular heating elements swaged under 50 tons of pressure into grey iron castings. For more than 25 years, Diff-Therm® heaters have set the standard for long life, evenly distributed process heating, and efficient power generation.

  • Platen Selector Guide
  • OEM Cross Reference
  • Accessories
  • Diff-Therm Technical Brief

Platen Selector Guide

Diff-Therm Platen Heaters can be configured in over 100 combinations of electrical ratings.

Download Platen Selector Guide

OEM Cross Reference

When you need to find parts or replace your heater, choose Dalton Electric Heating Co., Inc. We make it easy for original equipment manufacturers (OEMs) to find replacement heaters by manufacturer, pump size, and electrical rating. Take a look through the information below.

Systems Our Platen Heaters Can Replace
Our Diff-Therm Platen Heaters have been specifically designed to work as replacements for the following systems:

Matching bolt patterns, casting shapes and sizes will ensure ease of installation. Superior design and meticulous construction will also ensure uniform heating, longer life, and efficient power generation.

Revolutionary Design
Our Dalton Diff-Therm Heaters are built with high-purity magnesium oxide, nickel chromium resistance wire, and stainless steel internal components. Special filling methods and equipment compact the magnesium oxide tightly inside and around the resistor helix, which is then swaged under 50 tons of pressure to its maximum possible density. The result is very high dielectric strength and efficient internal heat generation. Diff-Therm castings are machined to a smooth, flat finish to ensure efficient and uniform heat conduction into the boiler plate assembly for steady vaporization of the pump fluid.

To order a replacement heater, select the Dalton Diff-Therm heater below that matches your equipment.

Brands

CVC Products

Diff-Therm Platen Heaters are designed as direct replacements for CVC Products Vacuum Diffusion Pump heaters.

Matching bolt patterns, casting shapes and sizes ensure ease of installation. Superior design and meticulous construction ensure uniform heating, longer life, and efficient power generation.

Dalton Diff-Therm heaters are built with high-purity magnesium oxide, nickel chromium resistance wire, and stainless steel internal components. Special filling methods and equipment compact the magnesium oxide tightly inside and around the resistor helix which is then swaged under 50 tons of pressure to its maximum possible density. The result is very high dielectric strength and efficient internal heat generation. Diff-Therm castings are machined to a smooth, flat finish to ensure efficient and uniform heat conduction into the boiler plate assembly for steady vaporization of the pump fluid.

To order a replacement heater, select the Dalton Diff-Therm heater below that matches your CVC Products equipment.

Heater Replacement Guide: CVC Products
PUMP SIZE PUMP MODEL Heaters per Pump Electrical Rating CVC PRODUCTS PART NO. DALTON PART NO. HEATER TYPE
WATTS VOLTS
2″ PMC-2 1 300W 115V 65192 W3C040-0111 CARTRIDGE
2″ PMC-2 1 300W 208V 65192-2 W3C040-0110 CARTRIDGE
2″ PMC-2 1 300W 230V 65192-1 W3C040-0113 CARTRIDGE
2″ KS-200 1 500W 115V 51832 W4C044-0115 CARTRIDGE
4″ PMC-4 4 300W 115V 65192 W3C040-0111 CARTRIDGE
4″ PMC-4 4 300W 208V 65192-2 W3C040-0110 CARTRIDGE
4″ PMC-4 4 300W 230V 65192-1 W3C040-0113 CARTRIDGE
6″ PMC-6 6 300W 115V 65192 W3C040-0111 CARTRIDGE
6″ PMC-6 6 300W 208V 65192-2 W3C040-0110 CARTRIDGE
6″ PMC-6 6 300W 230V 65192-1 W3C040-0113 CARTRIDGE
6″ PVMS-10 1 2200W 230V 285801-2 2223-6/5D PLATEN
10″ PMC-10 18 250W 208V 270819-0002 W3C034-0114 CARTRIDGE
10″ PMC-10 18 250W 230V 270819 W3C034-0112 CARTRIDGE
10″ PVMS-11, -12 1 5000W 230V 281463-1 5023-10/9D PLATEN
10″ PVMS-11, -12 1 5000W 460V 281463-2 5046-10/9D PLATEN
16″ PVM-16 6 1600W 230V 281760-2 1623-8/2R PLATEN
20″ PVM-20 36 350W 115V 5507892-0001 3/512-2/9D PLATEN
20″ PMC-20C INNER 4310W 230V 269933-1 4323-12/3RI RING*
20″ PMC-20C INNER 4310W 460V 269933-3/5 4346-12/3RI RING*
20″ PMC-20C OUTER 6690W 230V 269933-2 6723-17/7RI RING*
20″ PMC-20C OUTER 6690W 460V 269933-4/6 6746-17/7RI RING*
32″ PVM-32 30 750W 115V 279503-0001 7/512 -4/9D PLATEN
32″ PVM-32 30 750W 230V 279503-0002 7/523 -4/9D PLATEN
35″, 48″ PMC-32C, -48C INNER 8930W 230V 269217-5 8923-23/9RI RING*
35″, 48″ PMC-32C, -48C INNER 8930W 460V 269217-1/3 8946-23/9RI RING*
35″, 48″ PMC-32C, -48C OUTER 11350W 230V 269217-6 11423-29/8RI RING*
35″, 48″ PMC-32C, -48C OUTER 11350W 460V 269217-2/4 11446-29/8RI RING*
ALL SIZES VARIOUS ALL TYPE AS REQUIRED CUSTOM ALL TYPES
* Use Diff-Tranz High Temperature Heat Transfer Compound

Cooke Vacuum

Diff-Therm Platen Heaters are designed as direct replacements for Cooke Vacuum Diffusion Pump heaters.

Matching bolt patterns, casting shapes and sizes ensure ease of installation. Superior design and meticulous construction ensure uniform heating, longer life, and efficient power generation.

Dalton Diff-Therm heaters are built with high-purity magnesium oxide, nickel chromium resistance wire, and stainless steel internal components. Special filling methods and equipment compact the magnesium oxide tightly inside and around the resistor helix which is then swaged under 50 tons of pressure to its maximum possible density. The result is very high dielectric strength and efficient internal heat generation. Diff-Therm castings are machined to a smooth, flat finish to ensure efficient and uniform heat conduction into the boiler plate assembly for steady vaporization of the pump fluid.

To order a replacement heater, select the Dalton Diff-Therm heater below that matches your Cooke equipment.

Heater Replacement Guide: Cooke Vacuum Products
PUMP
SIZE
PUMP
MODEL
Heaters
per Pump
Electrical Rating COOKE VACUUM
PART NO.
DALTON
PART NO.
HEATER
TYPE
WATTS VOLTS
4″ DPD-4-1250 1 1350W 115V 621-04 1412-5/5D PLATEN
4″ DPD-4-1250 1 1350W 230V 622-04 1423-5/5D PLATEN
6″ DPD-6-2400 1 2150W 230V 622-06 2223-7/3D PLATEN
ALL SIZES VARIOUS 1 AS REQUIRED CUSTOM CUSTOM PLATEN

Edwards High Vacuum

Diff-Therm Platen Heaters are designed as direct replacements for Edwards High Vacuum Diffusion Pump heaters.

Matching bolt patterns, casting shapes and sizes ensure ease of installation. Superior design and meticulous construction ensure uniform heating, longer life, and efficient power generation.

Dalton Diff-Therm heaters are built with high-purity magnesium oxide, nickel chromium resistance wire, and stainless steel internal components. Special filling methods and equipment compact the magnesium oxide tightly inside and around the resistor helix which is then swaged under 50 tons of pressure to its maximum possible density. The result is very high dielectric strength and efficient internal heat generation. Diff-Therm castings are machined to a smooth, flat finish to ensure efficient and uniform heat conduction into the boiler plate assembly for steady vaporization of the pump fluid.

To order a replacement heater, select the Dalton Diff-Therm heater below that matches your Edwards High Vacuum equipment.

Heater Replacement Guide: EDWARDS HIGH VACUUM
PUMP
SIZE
PUMP
MODEL
Heaters
per Pump
Electrical Rating EDWARDS HEATER NO. DALTON
PART NO.
HEATER
TYPE
WATTS VOLTS
4″ SI100 1 250W 120V D5C067-2563 CARTRIDGE
4″ E04 1 850W 120V H017-00-140 8/512-4D PLATEN
4″ E04 1 850W 240V H017-00-137 8/524-4D PLATEN
6″ E06 1 1350W 120V H017-00-59 & 102 1412-4/9D PLATEN
6″ E06 1 1350W 240V H017-00-54 & 113 1424-4/9D PLATEN
9″ E09 1 2250W 120V H017-00-161 & 132 2312-6/9D PLATEN
9″ E09 1 2250W 240V H017-00-158 & 137 2324-6/9D PLATEN
10″ HT10 3 1700W 220V 26906-016 1722-6DE PLATEN
10″ HT10 3 1700W 460V 26906-013 1746-6DE PLATEN
12″ E012 3 1600W 120V H017-00-181 & 102 1612-6E PLATEN
12″ E012 3 1600W 240V H017-00-179 & 113 1624-6E PLATEN
16″ HT16 6 1500W 220V 26906-023 1522-6DE PLATEN
16″ HT16 6 1500W 460V 26906-019 1546-6DE PLATEN
18″ 18B4 3 2000W 220V 26906-026 2022-6DE PLATEN
18″ 18B4 3 2000W 460V 26906-030 2046-6DE PLATEN
20″ HT20 6 2100W 220V 26906-033 2122-10RE PLATEN
20″ HT20 6 2100W 460V 26906-037 2146-10RE PLATEN

Leybold

Watt-Flex® Cartridge Heaters are designed as direct replacements for Leybold Diffusion Pump Heaters.

The split sheath heater is designed for easy insertion into the heater tube at the base of the Leybold pump. The heater can be provided with or without the mounting bracket used to secure the heater in place.

When energized, the heater legs expand bi-laterally, making contact with the bore to maximize heat transfer to the heater tube and into the diffusion oil. When de-energized, the cartridge heater contracts for easy removal from the bore, eliminating drill outs, damage to the bore, and costly down-time.

Watt-Flex Cartridge heaters can be specially manufactured in 200 or 270 volt. To order a replacement heater, select the Dalton Watt-Flex heater below that matches your Leybold Vacuum Diffusion Pump.

Heater Replacement Guide: Leybold Vacuum Diffusion Pumps
PUMP SIZE PUMP MODEL Heaters per Pump Electrical Rating LEYBOLD PART NO. DALTON PART NO. HEATER TYPE
WATTS VOLTS
10″ DIP 3 000 2 1250W 230V 200 05 457 D9C200-2762 CARTRIDGE
16″ DIP 8 000 6 800W 230V 200 05 458 D9C200-2761 CARTRIDGE
20″ DIP 12 000 9 800W 230V 200 05 458 D9C200-2761 CARTRIDGE
26″ DIP 20 000 12 1000W 230V 200 05 459 D9C200-2760 CARTRIDGE
32″ DIP 30 000 18 1000W 230V 200 05 459 D9C200-2760 CARTRIDGE
39″ DIP 50 000 24 1000W 230V 200 05 459 D9C200-2760 CARTRIDGE

Torr Scientific

Diff-Therm Platen Heaters are designed as direct replacements for Torr Vacuum Diffusion Pump heaters.

Matching bolt patterns, casting shapes and sizes ensure ease of installation. Superior design and meticulous construction ensure uniform heating, longer life, and efficient power generation.

Dalton Diff-Therm heaters are built with high-purity magnesium oxide, nickel chromium resistance wire, and stainless steel internal components. Special filling methods and equipment compact the magnesium oxide tightly inside and around the resistor helix which is then swaged under 50 tons of pressure to its maximum possible density. The result is very high dielectric strength and efficient internal heat generation. Diff-Therm castings are machined to a smooth, flat finish to ensure efficient and uniform heat conduction into the boiler plate assembly for steady vaporization of the pump fluid.

To order a replacement heater, select the Dalton Diff-Therm heater below that matches your Torr equipment.

Heater Replacement Guide: TORR Vacuum Diffusion Pumps
PUMP
SIZE
PUMP
MODEL
Heaters
per Pump
Electrical Rating TORR
PART NO.
DALTON
PART NO.
HEATER
TYPE
WATTS VOLTS
4″ R-420 1 1450W 208V 954372 1521-5DT PLATEN
6″ R-620 1 1950W 208V 957101 2021-7DT PLATEN
10″ R-1020 1 4300W 208V 957111 4321-11DT PLATEN
ALL VARIOUS 1 AS REQUIRED CUSTOM CUSTOM PLATEN

Agilent/Varian

Dalton’s Diff-Therm Platen Heaters are designed as direct replacements for Agilent / Varian Vacuum Diffusion Pump Heaters.

Matching bolt patterns, casting shapes and sizes ensure ease of installation. Superior design and meticulous construction ensure uniform heating, longer life, and efficient power generation.

Dalton Diff-Therm heaters are built with high-purity magnesium oxide, nickel chromium resistance wire, and stainless steel internal components. Special filling methods and equipment compact the magnesium oxide tightly inside and around the resistor helix which is then swaged under 50 tons of pressure to its maximum possible density. The result is very high dielectric strength and efficient internal heat generation. Diff-Therm castings are machined to a smooth, flat finish to ensure efficient and uniform heat conduction into the boiler plate assembly for steady vaporization of the pump fluid.

To order a replacement heater, select the Dalton Diff-Therm heater below that matches your Varian equipment.

Heater Replacement Guide: AGILENT / VARIAN
PUMP SIZE PUMP MODEL Heaters per Pump Electrical Rating AGILENT/VARIAN HEATER NO. DALTON PART NO. HEATER TYPE
WATTS VOLTS
2″ HSA 1 350W 120V 0181-6473-01-100 W5C030-0117 CARTR.
2″ HS-2 1 450W 120V 0181-6473-02-125 W5C033-0118 CARTR.
2″ M-2 1 450W 120V 0181-6472-03-120 4/512-2/9D PLATEN
4″ H4X, VHS-4 1 1450W 120V 0181-6473-04-205 1512-4/9D PLATEN
4″ H4X, VHS-4 1 1450W 208V 0181-6473-210 1521-4/9D PLATEN
4″ H4X, VHS-4 1 1450W 240V 0181-6473-04-250 1524-4/9D PLATEN
4″ M-4, NHS-4 1 1190W 120 0181-6473-04-100 1212-4/9D PLATEN
4″ M-4, NHS-4 1 1190W 240 0181-6473-04-200 1224-4/9D PLATEN
4″ VARIOUS 1 AS REQUIRED CUSTOM 4/9D PLATEN
4″ HS4/0161 1 1000W 120V 0181-6473-04-004 1012-5/D PLATEN
4″ VARIOUS 1 AS REQUIRED CUSTOM 5D PLATEN
6″ VHS-6, VS250 1 2200W 120V 0181-6473-06-125 2212-6D PLATEN
6″ VHS-6, VHS250 1 2200W 208V 0181-6473-06-175 2221-6D PLATEN
6″ VHS-6, VHS250 1 2200W 240V 0181-6473-06-225 2224-6D PLATEN
6″ VHS-6, VHS250 1 2200W 480V NOT LISTED 2248-6D PLATEN
6″ M-6, NHS-6 1 1785W 120V 0181-6473-06-100 1812-6D PLATEN
6″ M-6, NHS-6 1 1500W 208V 0181-6473-06-150 1521-6D PLATEN
6″ M-6, NHS-6 1 1785W 240V 0181-6473-06-200 1824-6D PLATEN
6″ VARIOUS 1 AS REQUIRED CUSTOM 6D PLATEN
6″ HS6/0162 1 1800W 120V 0181-6473-01-005 1812-7D PLATEN
6″ HS6/0162 1 1800W 240V 0181-6473-01-006 1824-7D PLATEN
6″ VARIOUS 1 AS REQUIRED CUSTOM 7D PLATEN
10″ HS-10 1 3900W 208V NOT LISTED 3921-11D PLATEN
10″ HS-10 1 3900W 240V NOT LISTED 3924-11D PLATEN
10″ HS-10 1 3900W 480V NOT LISTED 3948-11D PLATEN
10″ HS-10 1 3300W 480V 0180-6473-10-230 3348-11D PLATEN
10″ VARIOUS 1 AS REQUIRED CUSTOM-11D PLATEN
10″ VHS-10, VHS400 1 5000W 208V NOT LISTED 5021-12D PLATEN
10″ VHS-10, VHS400 1 5000W 240V NOT LISTED 5024-12D PLATEN
10″ VHS-10, VHS400 1 5000W 480V NOT LISTED 5048-12D PLATEN
10″ VHS-10, VHS400 1 4400W 208V 0181-6473-10-140 (x2) 4421-12D PLATEN
10″ VHS-10, VHS400 1 4400W 240V 0181-6473-10-150 (x2) 4424-12D PLATEN
10″ VHS-10, VHS400 1 4400W 480V 0181-6473-10-170 (x2) 4448-12D PLATEN
10″ VARIOUS 1 AS REQUIRED CUSTOM 12D PLATEN
16″ HS-16 3 3200W 240V NOT LISTED 3224-8R PLATEN
16″ HS-16 3 3200W 480V NOT LISTED 3248-8R PLATEN
16″ HS-16 3 2700W 240V 0181-6473-16-035 2724-8R PLATEN
16″ HS-16 3 2700W 480V 0181-6473-16-045 2748-8R PLATEN
16″ VARIOUS 3 AS REQUIRED CUSTOM 8R PLATEN
20″ HS-20 6 2400W 240V NOT LISTED 2424-10R PLATEN
20″ HS-20 6 2400W 480V NOT LISTED 2448-10R PLATEN
20″ HS-20 6 2000W 240V 0181-6473-20-060 2024-10R PLATEN
20″ HS-20 6 2000W 480V 0181-6473-20-070 2048-10R PLATEN
20″ HS-20 6 AS REQUIRED CUSTOM 10R PLATEN
32″ HS-32 6 4000W 240V 0181-6473-32-075 4024-14R PLATEN
32″ HS-32 6 4000W 480V 0181-6473-32-075 4048-14R PLATEN
32″ VARIOUS 6 AS REQUIRED CUSTOM 14R PLATEN
35″ NHS-35 6 4000W 240V 0181-6472-35-248 4024-16/8R PLATEN
35″ NHS-35 6 4000W 480V 0181-6472-35-248 4048-16/8R PLATEN
35″ VARIOUS 6 AS REQUIRED CUSTOM16/8R PLATEN

Veeco

Dalton Diff-Therm platen heaters are designed as direct replacements for Veeco Vacuum Diffusion Pump Heaters.

Matching bolt patterns, casting shapes and sizes ensure ease of installation. Superior design and meticulous construction ensure uniform heating, longer life, and efficient power generation.

Dalton Diff-Therm heaters are built with high-purity magnesium oxide, nickel chromium resistance wire, and stainless steel internal components. Special filling methods and equipment compact the magnesium oxide tightly inside and around the resistor helix which is then swaged under 50 tons of pressure to its maximum possible density. The result is very high dielectric strength and efficient internal heat generation. Diff-Therm castings are machined to a smooth, flat finish to ensure efficient and uniform heat conduction into the boiler plate assembly for steady vaporization of the pump fluid.

To order a replacement heater, select the Dalton Diff-Therm heater below number that matches your Veeco Vacuum Diffusion Pump Equipment.

Heater Replacement Guide: VEECO Vacuum Diffusion Pumps
PUMP
SIZE
PUMP
MODEL
Heaters
per Pump
Electrical Rating VEECO
HEATER NO.
DALTON
PART NO.
HEATER
TYPE
WATTS VOLTS
3″ 300 Series 1 350W 115V 1180-030-00 3/512-3/3D PLATEN
6″ 7700 Series 1 1800W 208V 1180-220-00 1821-6D PLATEN
6″ 7760 Series 1 1800W 208V 1180-220-00 1821-6D PLATEN
10″ 747 Series 1 1800W 208V 1180-220-00 1821-6D PLATEN

Accessories

High-Temperature Manganese Nickel
Conductor Wire (1000°F Max)
Part
Number
Size
AWG
Max Amps
at 800 °F
Recommended as lead wires for connections
to header terminals in high-temperature
areas. Use with ceramic bead insulators.
A269270 10 30
Ceramic Bead Insulators Part
Number
Wire
Size
Beads
per Foot
Withstand temperatures to 2000°F A263943 10 38
High-Temperature Nickel Ring
Terminals (Stak-On type)
Part
Number
Wire
Size
Stud
Size
Recommended for connections in
high-temperature areas.
A322334
A323745
16-14
12-10
#8
#8
Diff-Tranz High-Temperature Heat Transfer
Compound for Temperatures to 1250°F (675°C)
Part
Number
1-gallon
container
Recommended for use with Ring heaters. Also for mounting Platen heaters when contact between the heater and pump boiler plate is poor. Not recommended for cartridge heaters. A600675
High-Temperature (850°F/450°C max)
Insulated “A” Nickel Conductor Wire
Part
Number
Size
AWG
Max Amps
at 680°F
A0585-8
A0585-9
14
12
12
15

Diff-Therm Technical Brief

Simplify Vacuum Diffusion Pump Heating
Vacuum diffusion pumps require an effective heating system to drive the pump. Conventional designs often employ a complicated series of components that must be carefully matched up, adding unnecessary time, labor, and cost to the replacement process.

Many vacuum diffusion pumps use a tubular heater, clamping plate, and crush the plate assembly for fluid heating. The tubular heater is pushed against the pump boiler plate by a dimpled crush plate. Heat transfer is limited to those points at which the heater makes contact with the flat boiler plate.

Conventional Crush Plate Assembly


The crush plate is held in place by a clamping plate which is attached to the base of the pump by one or more studs. Proper alignment of the assembly is critical and can be difficult if space is limited.

Diff-Therm vacuum diffusion pump heaters solve this problem of conventional heater design. the tubular element is swaged directly into a cast iron platen, increasing the density and uniformity of the insulation for better heat transfer. Better heat transfer means longer heater life.

Diff-Therm One-Piece Construction


The one-piece Diff-Therm assembly simply bolts to the bottom of the boiler plate, replacing the tubular heater, crush plate, and clamping plate thus eliminating the complicated alignment process. Compared with the limited contact area (one side of the tubular element) of conventional designs, the flat surface of the Diff-Therm platen provides greater contact area for more effective heat transfer to the boiler plate.

Dalton Electric Heating Company manufactures and stocks Diff-Therm heaters for almost every pump model. Diff-Therm heaters are available for 2″ to 48″ Diffusion Pumps in over 100 combinations of electrical and casting sizes.

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