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The 640B absolute pressure controllers is a self contained, compact, closed-loop electronic pressure control system containing a Baratron® capacitance manometer, normally closed proportioning control valve, and closed-loop control electronics. Electrically similar to a standard MFC, the 640B is powered by ±15 VDC at only 200 mA, permitting use with standard power supply and display electronics. The pressure output and input control signals are linear 0-5 or 0-10 VDC. Two trip points with LED status indicators are for use as simple on/off process limits.
Compare | Model | Drawings, CAD & Specs | Availability | Price | |||
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Absolute Pressure Controller, 10 Torr, 200 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$2,950
3 Weeks
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640B11TW1M12M Absolute Pressure Controller, 10 Torr, 200 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug |
3 Weeks
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$2,950 |
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Absolute Pressure Controller, 10 Torr, 200 sccm, 4 VCR-M, Metal Seal, Viton Valve Plug
$2,950
3 Weeks
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640B11TW1M12V Absolute Pressure Controller, 10 Torr, 200 sccm, 4 VCR-M, Metal Seal, Viton Valve Plug |
3 Weeks
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$2,950 |
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Absolute Pressure Controller, 10 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$2,950
3 Weeks
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640B11TW1M22M Absolute Pressure Controller, 10 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug |
3 Weeks
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$2,950 |
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Absolute Pressure Controller, 10 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Viton Valve Plug
$2,950
3 Weeks
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640B11TW1M22V Absolute Pressure Controller, 10 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Viton Valve Plug |
3 Weeks
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$2,950 |
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Absolute Pressure Controller, 10 Torr, 5000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$2,950
3 Weeks
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640B11TW1M32M Absolute Pressure Controller, 10 Torr, 5000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug |
3 Weeks
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$2,950 |
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Absolute Pressure Controller, 100 Torr, 200 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$2,950
3 Weeks
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640B12TW1M12M Absolute Pressure Controller, 100 Torr, 200 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug |
3 Weeks
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$2,950 |
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Absolute Pressure Controller, 100 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$2,950
3 Weeks
|
640B12TW1M22M Absolute Pressure Controller, 100 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug |
3 Weeks
|
$2,950 |
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![]() |
Absolute Pressure Controller, 100 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Viton Valve Plug
$2,950
3 Weeks
|
640B12TW1M22V Absolute Pressure Controller, 100 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Viton Valve Plug |
3 Weeks
|
$2,950 |
|
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![]() |
Absolute Pressure Controller, 100 Torr, 5000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$2,950
3 Weeks
|
640B12TW1M32M Absolute Pressure Controller, 100 Torr, 5000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug |
3 Weeks
|
$2,950 |
|
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![]() |
Absolute Pressure Controller, 100 Torr, 200 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug
$2,525
3 Weeks
|
640B12TW1V12V Absolute Pressure Controller, 100 Torr, 200 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug |
3 Weeks
|
$2,525 |
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![]() |
Absolute Pressure Controller, 100 Torr, 1000 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug
$2,525
3 Weeks
|
640B12TW1V22V Absolute Pressure Controller, 100 Torr, 1000 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug |
3 Weeks
|
$2,525 |
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![]() |
Absolute Pressure Controller, 100 Torr, 5000 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug
$2,525
3 Weeks
|
640B12TW1V32V Absolute Pressure Controller, 100 Torr, 5000 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug |
3 Weeks
|
$2,525 |
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![]() |
Absolute Pressure Controller, 1000 Torr, 200 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$2,950
3 Weeks
|
640B13TW1M12M Absolute Pressure Controller, 1000 Torr, 200 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug |
3 Weeks
|
$2,950 |
|
||
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Absolute Pressure Controller, 1000 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$2,950
3 Weeks
|
640B13TW1M22M Absolute Pressure Controller, 1000 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug |
3 Weeks
|
$2,950 |
|
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![]() |
Absolute Pressure Controller, 1000 Torr, 5000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$2,950
3 Weeks
|
640B13TW1M32M Absolute Pressure Controller, 1000 Torr, 5000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug |
3 Weeks
|
$2,950 |
|
||
![]() |
Absolute Pressure Controller, 1000 Torr, 200 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug
$2,525
3 Weeks
|
640B13TW1V12V Absolute Pressure Controller, 1000 Torr, 200 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug |
3 Weeks
|
$2,525 |
|
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Absolute Pressure Controller, 1000 Torr, 1000 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug
$2,525
3 Weeks
|
640B13TW1V22V Absolute Pressure Controller, 1000 Torr, 1000 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug |
3 Weeks
|
$2,525 |
|
||
![]() |
Absolute Pressure Controller, 1000 Torr, 5000 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug
$2,525
3 Weeks
|
640B13TW1V32V Absolute Pressure Controller, 1000 Torr, 5000 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug |
3 Weeks
|
$2,525 |
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The following options are available for 640B Absolute Pressure Controllers
Ordering Code Example: 640B13TW1V42V
Configuration Option | Option Code |
---|---|
640B Absolute Pressure Controller |
640B |
Pressure Range Full Scale | |
10 Torr | 11T |
100 Torr | 12T |
1000 Torr | 13T |
60 psi | 61P |
100 psi | 12P |
Fittings | |
Swagelok 4 VCR male | W |
Swagelok 8 VCR male | T |
Swagelok 1/4 in. | S |
W-Seal (2787.3F) | H |
C-Seal (2787.1) | C |
Valve | |
Normally closed | 1 |
Seal Materials | |
Viton | V |
Kalrez | D |
Metal | M |
Orifice Size | |
A (50 sccm) | A |
#1 (200 sccm) | 1 |
#2 (1000 sccm) | 2 |
#3 (5000 sccm) | 3 |
#4 (10000 sccm) | 4 |
#5 (20000 sccm) | 5 |
#6 (30000 sccm) | 6 |
Trip Points | |
With | 2 |
Valve Plug Material | |
Viton | V |
Kalrez | D |
Metal | M |
Kel-F | F |
The flow through any orifice depends on the size of the orifice, the inlet and outlet pressures, and gas density. To simplify 640/641 orifice selection, use the following procedure:
In the 640 Controller, the Baratron pressure transducer measures absolute pressure; in the 641 model, it measures gauge pressure (pressure relative to ambient barometric pressure). In both models, Full Scale ranges of 10, 100, or 1000 Torr, or 60 or 100 psi are available. Each 640/641 can control pressure from Full Scale to less than 2% of Full Scale. Prudent design suggests choosing the lowest possible Full Scale for the application, taking into consideration the overpressure to which the sensor may be exposed (both normal and accidental).
Example
You want to control a vacuum process at a pressure of 0.5 psia, with a flow rate of 2000 sccm of He. Your inlet pressure is 15 psia, giving a differential pressure (delta P) of 15 psi, resulting in an uncorrected Index Number value of 90. The gas density correction for He is calculated as shown above. Multiplying 2.6 by 90 gives a density-corrected Index Number of 234. Drawing a vertical line on the Orifice Selection Chart at 234 indicates Orifice #3 would be the best choice.