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Low Pressure
Latch Valves

Close Overview Flow Control Valve Pyrotechnic Valve Latch Valve Fill and Drain Valves Ground Half Coupling Xenon Regulator

 

Latch Valves for Space Propulsion Systems

Low pressure latch valves for water, N2H4, MMH, NTO, IPA, He, N2, Xe etc.

 

Low Pressure Latch Valve
Low Pressure Latch Valve
 

The low pressure latch valve is a solenoid operated, bi-stable valve constructed essentially of stainless steel and qualified to operate with a number of different working media, including hydrazine and its most common derivatives.

 

The valve provides a fully reliable safety barrier in propellant flow lines between propellant tanks and thrusters. The valve is equipped with a back relief function that protects the downstream lines and equipment against over-pressure (e.g. due to environmental effects).

 

For valve opening and closing, two coils are provided operating at a supply voltage within the range of 22VDC ≤ 38 VDC. For position indication, a micro switch is incorporated to indicate the open or closed position.

 

At room-temperature the LPLV can be closed or opened within a switch-time of 30ms while the pulse width is 50ms.

 

The valve is available with either a welded or screwed interface for the tubing connection. In all other respects, the valves are identical.

 

 

 

Low Pressure Latch Valve Characteristics
Characteristic
Nominal Value
Remarks
Tubing Interface
1/4 inch
Screwed or welded versions available
Operating voltage
22-32 VDC
Up to 50VDC for 50ms switching pulses
Response time
<30 ms
Opening and Closing
Coil resistance
37,5 Ω ± 1,5 Ω
At ambient temperature
Max.operating pressure
24,25 bar
Specified value; higher values possible
Internal Leakage Rate
< 5 scc/h GHe
 
Back-Relief Pressure
8 to 14 bar
 
Flow Rate and Pressure Drop
<0.15 bar at 4.5 g/s
Flow rates up to >20g/s usable
Fluid Compatibility
Water, hydrazine, MMH, NTO, IPA, He, N2, Xe, and others

 

 

 

 

Low Pressure Latch Valve Heritage
Spacecraft
Launch Year
Giotto
1984
Hipparcos
1986
Meteosat
1986-88
DFS
1987
Eureca
1990
HAPS
1990
ISO
1992
SOHO
1995
Pléiades
2011-13
Galileo IOC
2010-14
Spacecraft
Launch Year
Sentinel-1A
2014
Sentinel-1B
2016
Sentinel-2A
2015
Sentinel-2B
2016
CSO
2016
Seosat-Ingenio
2015
Spot 6
2012
Spot 7
2014
Sentinel-5 Precursor
2016
Fluidic Equipment Brochure (pdf)
Fluidic Equipment
(PDF Brochure)

Fluidic Equipment Brochure  (pdf)

This brochure is available to view online from where it may be downloaded.

 

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 If you require the printed version of this brochure, or more detailed information about this product please contact us.

 

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