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 |
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.