 Product
Overview:
The TT01-001 is a thermally operated flow controller for
use with xenon flow controllers in electric propulsion systems
with the capability to provide a low cost flow controller
to convert fixed thrust cold gas thrusters into proportional
thrusters.
The controller design is based on well established principles,
offering a large flow range, typically from 0.05 to 20mg/s.
It can be fitted with single or dual redundant heaters, is
all-welded, and is manufactured from flight qualified materials.
The controller consists of a flow tube and pin which are
heated by means of a spiral heating element. This element
is surrounded by a low thermal conductivity ceramic which
also forms the housing and provides some thermal conductivity
to the structure, optimizing power consumption and response
time for flow increase. Flow decrease is readily achieved
by increasing the heater power to 10W for a few seconds.
Inlet and outlet pipes are welded to the central tube to
provide the gas flow path and minimize external leakage with
an all-welded construction.
A typical flow range is shown against heater power levels
in the figure below.
Performance Characteristics:
| Operating Media |
GHe, GN2, GXe, Dry
air |
| Operational Temperature |
-40°C to +100°C |
| Operating Pressure |
2.5 bar |
| Power |
0 to 8 W |
| Heater Resistance |
4 Ω 20°C (Typical) |
| Response Time |
Flow Reduction |
< 20 s |
| Flow Increase |
< 60 s |
| External Leakage |
< 1 x 10-6
scc/s GHe |
| Flow Range |
0.05 mg/s to 20 mg/s (Typical) |
| Cycle Life |
7,000 |
| Mass |
< 20 g |
| Materials |
Stainless Steel, Radiometal, Ceramic |
| Pipe Connections |
1/16" OD Stainless Steel Tube |
| Housing Dimensions |
24.5 x 12 x 19
mm |
Product History:
This product is in development.
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