Mass Flow Controller System
| Description |
 |
The complete 8270 Mass
Flow Controller System offered by Matheson consists of a flow
controller transducer (Model 8272/8273 Series), a digital
readout power supply box, a feedback circuit to control the
flow, an integral control valve and all of the necessary cable
and connectors. An additional feature of the control box is a
three position selector switch to allow the user to conveniently
switch between an open position (valve fully open), a closed
position (valve fully closed) and a control position (unit
functioning as a controller). The first two positions mentioned
are override positions. These flow controllers can be supplied
with either Swagelok tube connections (standard) or optional
male VCR compatible connections for easy installation into
tubing and piping systems. |
| In the
operating or "Control" mode the unit functions similar
to a mass flowmeter but with the addition of a feedback circuit
and control valve, which continuously monitor and control the
flow of gas passing through the unit. When there is a flow
imbalance sensed, an electronic logic circuit sends power to the
control valve to maintain the flow setpoint by either throttling
open or closed. |
| The 8270
Mass Flow Controller Digital Readout Box is available standard
for rack mounting in a 1/2 EIA rack or for benchtop use. Other
standard features are high to low alarm setpoints selected by
the user. The transducer portion of the unit is supplied
standard with Swagelok® connections. The Model 8124 Totalizer
is also available and can be used to compile the total amount of
gas used over a period of time, regardless of varying flow
rates. |
| Specifications |
| Materials: |
- |
Body:
|
316
Stainless Steel |
By-pass:
|
316
Stainless Steel |
Fittings:
|
316
Stainless Steel |
Valve:
|
316
Stainless Steel |
| Standard
Seals: |
Viton |
| Valve
Shut-off: |
Normally
Closed; Bubble Tight |
| Standard
Valve Seat: |
Viton |
| Proof
Pressure: |
1500
psig |
| Min
Differential Pressure: |
5 psi |
| Max
Differential Pressure: |
50 psi |
| Max
Operating Pressure |
- |
<500
ccm:
|
300
psig |
500
ccm-30 slpm:
|
500
psig |
> 30
slpm:
|
150
psig |
| Temperature
Range: |
5-45°C |
| Accuracy: |
+/- 1
% full scale |
| Standard
Calibration Temperature: |
0°C |
| Temperature
Coefficient: |
<0.1%
per °C |
| Response
Time: |
0.5
seconds to 98% of scale |
| Repeatability: |
0.2% |
| Control
Range |
- |
Series:
|
0.2
ccm to 1000 slpm |
Individual
Unit:
|
2% to
100% Full Scale |
| Signal
Voltage Output: |
0-5
VDC |
| Voltage
Input: |
115
VAC 10 Watts |
| Cable
Lengths |
- |
Power
Cord:
|
6 foot |
Signal
Cable:
|
8 foot |
| Alarm
Contacts (Each Channel): |
1 amp
at 30 VDC Maximum |
| Shipping
Weight: |
8 lbs |
| Standard
Options |
| Model |
Description |
| 8291 |
Specific
Gas Calibrations (Limitations Apply) |
CBL-0125-XX
CBL-0126-XX
CBL-0127-XX |
Additional
Cable Length
25 Foot
50 Foot
100 Foot |
| 8292 |
230VAC
Models |
| 8293 |
VCR
End Fittings |
| 8294 |
Output
4-20mA |
| 8295 |
PTFE
Teflon® Seals |
| 8124 |
Totalizer
for Mass Flow Controller |
| HAN-0007-AA |
Full
Rack Mounting Adapter |
| Please
order Matheson Technical Bulletin TB-181 for additional
information. |
|
|
