GPTUs are multipurpose portable tanks. They are pressure loaded/offloaded
using either helium or nitrogen as a pressurant gas. They can be used to
directly load spacecraft when connected to a propellant control panel. GPTUs
are made of 304L Stainless Steel and are insulated by virtue of there double-tank
design (tank-in-a-tank like a cryogenic dewar). There are ten GPTUs and
they are routinely available in MMH, MPH, HPH, and N2O4 low
iron MON-3 service. GPTUs are available to commercial and DOD programs on
a non-interference basis.
| Equipment |
Generic Propellant Transfer Unit (GPTU) |
| Dimensions |
7' 10-3/4" X 5'4" Diameter |
| Weight |
5720 lb tare, 11770 lb w/N204, 9920 lb w/Hydrazine, 9370 lb w/MMH |
| Capacity |
500 gallons with 10% ullage |
| Quantity |
10 tanks |
| Connections |
Fill/Drain 1.5" KC male or reduced to 0.5" KC (typical)
Pressure/Vent 3/4" KC male or reduced to 0.5" KC (typical) |
| DOT Code |
DOT 51 portable tank with DOT-E-10887 for N2O4 service. |
| MAWP |
300 psig |
| Operating Pressure |
Full vacuum to 50 psig |
| PRV Setting |
286 psig |
| Approved Fluids |
Hydrazine family fuels, N2O4,
and related solutions. Helium or Nitrogen gas used for pressurant. |
| Other Features |
Lift with crane or forklift. Built-in load cell weighing system. Transport
on special trailer. Separate work platform available. |
|
