VACCO Latch Valves / Isolation Valves
VACCO Industries
Flight-proven high- and low-pressure latch (isolation) valves used across commercial and government satellite propulsion systems since 1988.
Technical specifications
- Valve type
- High-pressure latch, low-pressure latch, positive isolation
- Max operating pressure
- Up to 5,000 psia (350 bar)
- Materials
- Titanium or stainless steel
- Inlet filtration
- Integral etched-disc filter
- Flight heritage
- In production since 1988
- Flight heritage (2)
- Boeing HS601/HS702, Astrium Eurostar 3000, Mitsubishi DS2000, ATV, HTV, Cygnus
- Mass
- <340 grams (0.75 lb)
- Operating Pressure Range
- 3000 psig
- Proof Pressure
- 4500 psig
- Burst Pressure
- 7500 psig
- Flow / Pressure Drop
- 10 psid @ 5 scfm GHe
- Internal Leakage
- <3.0 scch GHe
- External Leakage
- <1 X 10 sccs GHe
- Operating temperature
- 28°F to 122°F
- Cycle Life
- >25,000 Cycles
- Opening Response Time
- 30 msec @ 20 VDC
- Closing Response Time
- 30 msec @ 20 VDC
- Dielectric Strength
- 500 VAC RMS @ 60 Hz – 1 min
- Operating Voltage
- 20 – 54 VDC
About
Since the introduction of the latch valve family in 1988, VACCO latch valves have become an industry standard for propellant and pressurant isolation on spacecraft. They feature a no-sliding-fit valve design, an integral etched-disc inlet filter, fast response and high reliability, and are available in titanium or stainless steel. The product line spans low to high flow rates at operating pressures up to 5,000 psia (350 bar). VACCO latch valves have flown on Boeing HS601/HS702, Orbital Sciences Star-2, Astrium Eurostar 3000 (Xenon propulsion), and Mitsubishi Electric DS2000 satellite platforms, and support ISS resupply vehicles including the European ATV, Japanese HTV, and Orbital Sciences/NASA Cygnus. Positive isolation valve and propellant latch valve variants are also offered for propellant gauging and fluid isolation applications.
Documentation
- latch_valves_high_pressure.pdf PDF source: www.vacco.com ↗
- latch_valves_low_pressure.pdf PDF source: www.vacco.com ↗
- PIV-norm-closed_13097000.pdf PDF source: www.vacco.com ↗
Need the full ICD, test reports or a specific revision? Ask the supplier directly.