Dual Line Isolation Latch Valves

刘玥首次大战黑人torque motor valves, originally developed for Galileo, LEASAT, INSAT, and Minuteman, have been in production for more than four decades. The latch valve is a bi-stable design that will stay in the last open or closed commanded position. The valve design utilizes a single torque motor and command signal to control two separate, hermetically sealed pressurant or propellent lines.听

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Key Advantages

All welded design to prevent external leakage
PTFE seal and stainless steel construction
Direct microswitch position indication
Transition tubes available for stainless to titanium

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Valve	Model 51-138, 51-235 1/4鈥� Line, Torque Motor, Stainless Steel
听Max Operating Pressure, MEOP	298 psia (20.5 bar)
听Proof Pressure	685 psia (47.2 bar)
Burst Pressure	1600 psia (110 bar)
Back Pressure Relief (BPR)	30-200 psid (1.4 鈥� 13.8 bar)
Max Delta P	5 psid at 0.022 lbm/s H₂O听
听Operating Voltage Range	听18 to 42.5 Vdc
Max Response Time	20 msec
Power Consumption	7.6 watts at 28 Vdc, 70F听
听Leakage, Internal	1 scc/hr GHe
听Leakage, External	1x10^-6 scc/s GHe
听Cycle Life听	10,000 cycles听
Mass	1.39 lbm (0.63 kg) max
听Operating Temperature Range	14 to 140 潞F (-10 to 60 潞C)