 Product
Overview:
The VC02-006 Fill and Drain Valve is designed for charging
and venting high pressure pneumatic systems.
The valve consists of a Flight Half and Ground Half Coupling
and is constructed from stainless. The Ground Half displaces
the sealing mechanism, its probe passing through a ‘O’
ring providing a seal, when it is mated/screwed onto the flight
half creating a flow path to permit charging/venting. The
external cap complete with a seal on the external port provides
a seal to vacuum. In the VC02-007 variant a softer seal allows
use at low pressures.
Once the charge hose is disconnected the sealing mechanism
returns to its original position under the force of a spring.
The secondary seal to vacuum is provided by a cap complete
with seal fitted to the external port.
The valve was originally developed for aerospace application
and was qualified for space flight for use on SNAP.
Performance Characteristics:
| Operating Media |
GN2,
Xe, Ar, Butane |
| Operational Temperature |
-40°C to +70°C |
| Operating Pressure |
Up to 410 bar (VC02-006) |
| External Leakage |
< 1 x 10-6 scc/s
GHe @ 4 bar |
| Internal Leakage |
< 1 x 10-4 scc/s
GHe |
| Cycle Life |
> 20,000 cycles |
| Mass |
< 100 g |
| Materials |
Stainless Steel (300 series), Vespel SPI
or PTFE |
| Pipework Interfaces |
Stubs pipes for welding or 1/8" BSP
screwed connections |
| Maximum Body Length |
23.5 mm from cap end to back of hex |
| Outside Diameter |
15 mm A/F |
Product History:
This valve has flown on the SNAP and DMC Alsat Nigeria
Sat, UK-DMC and BilSat programmes, with future flights planned
on the GSTB-v2 spacecraft.
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