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.