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ECLSS High Pressure Flow Control and Isolation Valves



Moog produces a variety of fluid control components used in human space vehicles as part of their environmental control and life support systems (ECLSS). The components include mechanical pressure regulators, manual and electrically actuated valves, and passive components such as quick disconnects. These components are used in high- and low-pressure gas control systems, as well as liquid fluid control for thermal management.

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Key Features

  • High pressure O2 and N2 at 4500 psi, with mass flow rates of 0.02 lbm/sec (O2 and N2)

Electrically-actuated valves are 28 VDC devices that use brushless DC motors and solenoids to drive the units open or closed, and include normally-open / normallyclosed and latching designs.

 

Valve

Model 50-1472

Tank Valve Assembly

Model 50-1480

Pressure Regulator

Model 50-1473

Isolation Valve

Model 50-1475 / 50-1478

Quick Disconnect
Description

Dual manual latch valves, relief 

valve, pressure gauge, fill valve

 Two stage with relief valve BLDC motor-driven isolation valve Passive and active halves
Media Oxygen and Nitrogen Oxygen and Nitrogen Oxygen and Nitrogen Oxygen and Nitrogen
Unit Mass 8.8 lbm 12.0 lbm 4.5 lbm 5.9 lbm
Dimensions (L W H)  7.3” x 5.9” x 6.8” 9.5” x 3.9” x 5.9”  10” x 4” x 2”  5.7” x 2.5” x 2.5”
MEOP 4500 psia 4500 psia 4500 psia 4500 psia
MDP 4500 psia 4500 psia 4500 psia 4500 psia
Pressure Range, Inlet 0 – 4500 psia 250 – 4500 psia 0 – 4500 psia 0 – 4500 psia
Regulated Pressure, Outlet N/A 100 ± 10 psia N/A N/A
Lockup Pressure N/A 115 psia N/A N/A
Factors of Safety

Proof: 1.5x MEOP; 

Burst: 2.5x MEOP

Proof: 1.5x MEOP; 

Burst: 2.5x MEOP

Proof: 1.5x MEOP; 

Burst: 2.5x MEOP

Proof: 1.5x MEOP; 

Burst: 2.5x MEOP
Maximum Pressure Drop

100 psid 

(@ max temp, max flowrate)

 N/A 10 psid max @ 1 ACFM N2

54 psid 

(@ max. temp, max. flowrate)
Maximum Flowrate

0.0184 lbm/sec N2; 

0.009 lbm/sec O2

0.0184 lbm/sec N2; 

0.0184 lbm/sec O2

0.0184 lbm/sec N2; 

0.011 lbm/sec O2

0.0184 lbm/sec N2; 

0.009 lbm/sec O2
Leakage Internal (@ MDP, GHe) < 1 x 10-3 scc/sec < 1 x 10-3 scc/sec < 1 x 10-3 scc/sec N/A
Leakage External (@ MDP, GHe) < 1 x 10-3 scc/sec < 1 x 10-3 scc/sec < 1 x 10-3 scc/sec < 1 x 10-3 scc/sec
Temperature (Operating)  -40°F – 160°F -40°F – 160°F -40°F – 180°F -11°F – 160°F
Random Vibration 22 Grms 22 Grms 40 Grms 22 Grms
Shock 2880 G 2880 G 3500 G 2880 G
Cycle Life 50 cycles

13000 cycles (outlet); 

500 cycles (inlet)

 1200 cycles 100 cycles (mate-demate)
Wetted Materials Monel, Inconel, Vespel Monel, Inconel, Brass, BeCu, Vespel Monel, Inconel, Vespel Monel, CRES, Vespel
Filtration 25 micron absolute 55 micron absolute 25 micron absolute N/A
Operating Voltage N/A N/A 28 VDC nominal N/A
Current Draw N/A N/A

0.45 Amp min, 

controller limited

 N/A

Resources

Related Products

Low Pressure Flow Control and Isolation Valves