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They are Manual Turn Valves 1 and 2, РПВ-1 and РПВ-2. (Soyuz Crew Ops Manual p. 24). They enable pumpingmoving oxygen from tanks in the service module to the oxygen supply duct. source.

The crew ops manual contains a couple procedures involving them - e.g. closing them to determine presence of leaks.

They are Manual Turn Valves 1 and 2, РПВ-1 and РПВ-2. (Soyuz Crew Ops Manual p. 24). They enable pumping oxygen from tanks in the service module to the oxygen supply duct. source.

The crew ops manual contains a couple procedures involving them - e.g. closing them to determine presence of leaks.

They are Manual Turn Valves 1 and 2, РПВ-1 and РПВ-2. (Soyuz Crew Ops Manual p. 24). They enable moving oxygen from tanks in the service module to the oxygen supply duct. source.

The crew ops manual contains a couple procedures involving them - e.g. closing them to determine presence of leaks.

Source Link
SF.
SF.
  • 56k
  • 12
  • 184
  • 347

They are Manual Turn Valves 1 and 2, РПВ-1 and РПВ-2. (Soyuz Crew Ops Manual p. 24). They enable pumping oxygen from tanks in the service module to the oxygen supply duct. source.

The crew ops manual contains a couple procedures involving them - e.g. closing them to determine presence of leaks.