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640B Integrated Absolute Pressure Controllers
Overview
The 640B absolute pressure controller 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.
- Integrated Baratron® capacitance manometer technology
- Full Scale ranges as low as 10 Torr for low pressure processes
- Can be used with upstream or downstream controller applications
- Two alarm trip points for process limit control
Products
| 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
$3,098
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640B11TW1M12M Absolute Pressure Controller, 10 Torr, 200 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug | $3,098 |
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Absolute Pressure Controller, 10 Torr, 200 sccm, 4 VCR-M, Metal Seal, Viton Valve Plug
$3,098
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640B11TW1M12V Absolute Pressure Controller, 10 Torr, 200 sccm, 4 VCR-M, Metal Seal, Viton Valve Plug | $3,098 |
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Absolute Pressure Controller, 10 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$3,098
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640B11TW1M22M Absolute Pressure Controller, 10 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug | $3,098 |
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Absolute Pressure Controller, 10 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Viton Valve Plug
$3,098
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640B11TW1M22V Absolute Pressure Controller, 10 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Viton Valve Plug | $3,098 |
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Absolute Pressure Controller, 10 Torr, 5000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$3,098
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640B11TW1M32M Absolute Pressure Controller, 10 Torr, 5000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug | $3,098 |
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Absolute Pressure Controller, 100 Torr, 200 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$3,098
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640B12TW1M12M Absolute Pressure Controller, 100 Torr, 200 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug | $3,098 |
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Absolute Pressure Controller, 100 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$3,098
|
640B12TW1M22M Absolute Pressure Controller, 100 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug | $3,098 |
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Absolute Pressure Controller, 100 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Viton Valve Plug
$3,098
|
640B12TW1M22V Absolute Pressure Controller, 100 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Viton Valve Plug | $3,098 |
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Absolute Pressure Controller, 100 Torr, 5000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$3,098
|
640B12TW1M32M Absolute Pressure Controller, 100 Torr, 5000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug | $3,098 |
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Absolute Pressure Controller, 100 Torr, 200 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug
$2,652
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640B12TW1V12V Absolute Pressure Controller, 100 Torr, 200 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug | $2,652 |
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Absolute Pressure Controller, 100 Torr, 1000 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug
$2,652
|
640B12TW1V22V Absolute Pressure Controller, 100 Torr, 1000 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug | $2,652 |
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Absolute Pressure Controller, 100 Torr, 5000 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug
$2,652
|
640B12TW1V32V Absolute Pressure Controller, 100 Torr, 5000 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug | $2,652 |
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Absolute Pressure Controller, 1000 Torr, 200 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$3,098
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640B13TW1M12M Absolute Pressure Controller, 1000 Torr, 200 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug | $3,098 |
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Absolute Pressure Controller, 1000 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$3,098
|
640B13TW1M22M Absolute Pressure Controller, 1000 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug | $3,098 |
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|||
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Absolute Pressure Controller, 1000 Torr, 5000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug
$3,098
|
640B13TW1M32M Absolute Pressure Controller, 1000 Torr, 5000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug | $3,098 |
|
|||
|
|
Absolute Pressure Controller, 1000 Torr, 200 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug
$2,652
|
640B13TW1V12V Absolute Pressure Controller, 1000 Torr, 200 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug | $2,652 |
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Absolute Pressure Controller, 1000 Torr, 1000 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug
$2,652
|
640B13TW1V22V Absolute Pressure Controller, 1000 Torr, 1000 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug | $2,652 |
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Absolute Pressure Controller, 1000 Torr, 5000 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug
$2,652
|
640B13TW1V32V Absolute Pressure Controller, 1000 Torr, 5000 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug | $2,652 |
|
Configuration Options
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 |
Specifications
-
Type640B Absolute Pressure Controller
-
Pressure Range10, 100, 1000 mmHg (Torr), 60, 100 psi (Full Scale)
-
Fitting Type4 VCR, 8 VCR, 0.25 in. Tube, or Surface Mount
-
Flow Rate50, 200, 1000, 5000, 10000, 20000, 50000 sccm (nominal Full Scale flow rates for N2 with 15 psig on inlet and atmosphere on outlet)
-
Trip PointsTwo open-collector transistors
Rated: 250 mA @ 30 VDC
Adjustable: 1 to 100% of Full Scale
Hysteresis: 3% of Full Scale
Indicators: Green LED's on when actuated -
Pressure Control Accuracy±0.2% of Full Scale
-
Transducer Over Pressure Limit45 psia or 2x Full Scale, whichever is greater
-
Maximum Differential Pressure30 psi for 20,000 and 50,000 sccm orifices
150 psi for 50 to 10,000 sccm orifices
(consistent with transducer overpressure limit) -
Control ModeDownstream standard; Upstream optional
-
Pressure Measurement Accuracy±0.5% of Reading (includes linearity, hysteresis, and repeatability)
-
Zero Temperature CoefficientZero: ±0.02% of Full Scale/°C
-
Span Temperature CoefficientSpan: ±0.04% of Reading/°C
-
Control Range>2 to 100% of Full Scale
-
Typical Response Time<1.0 sec (excluding system time constant)
-
Operating Temperature0 - 50°C (32° to 122°F)
-
Storage Temperature-20 to 80°C (-4° to 176°F)
-
External Leak Integrity<10-9 scc/sec He
-
Leak Integrity Through Closed ValveElastomer valve: <10-4 scc/sec He
Metal valve: <1% of Full Scale (N2 @ 1 atm. ΔP)
Kel-F valve: <0.5% of Full Scale (N2 @ 1 atm. ΔP)
(through closed valve)* -
Wetted MaterialsStandard: 316L S.S., 316L/VAR S.S., Inconel, Nickel
Optional: Viton®, Kalrez®, Kel-F® -
Power Required±15 VDC ±5%, 200 mA maximum
-
Connector-Interface15-pin male type "D"
-
Meter Response Time<100 msec
-
RFI SensitivitySAMA 33.1, 1-abc: <0.2% of Full Scale
-
Input-Output Signals0-5 VDC standard; 0-10 VDC optional
-
Cable Length100 feet (30 m) maximum
-
Weight2.54 lbs. (1.15 kg)
-
Dimensions1.5 inches (38.1 mm) x 4.88 inches (124 mm) (4 VCR) x 5.50 inches (140 mm) maximum
-
ComplianceCE
Features
Index Number
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:
- On the Index Number Table in the figure, choose your inlet pressure from the column of pressures on the left – the pressure that will be applied to the inlet of your 640/641. (Note that the values are absolute pressure.)
- Next, from the row of pressures at the top of that table, select your differential (delta) pressure – this is the inlet pressure minus your outlet pressure.
- Locate the Index Number – where your selected row and column intersect.
- Calculate the Density Correction Factor.
Index Number Table
Maximum Flow Rate
- Go to the Orifice Selection Graph (see Figure) and locate your Index Number along the bottom axis.
- Draw a vertical line at your Index Number. This line will intersect with the Maximum Flow Rate lines for the valve orifices available.
- Choose the orifice whose maximum flow rate exceeds your requirements. If the point on the graph falls close to the maximum flow rate for an orifice, you may choose the next largest orifice number
Orifice Selection Graph
Pressure Range
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.
Resources
Application Notes
- 640/641 Pressure Controllers Using the P and I Switches: A Normal User Adjustment (63.9 kB, PDF)
- Configuring 640/641 Compact Pressure Controllers
Manuals
- 640B/641B Pressure Controller Manual (582.5 kB, PDF)
- 640 Pressure Controller Pin-outs (22.3 kB, PDF)
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