OM131
21
P1939-OM-131 R11
Chapter 2
Fig 2.5 shows the spool valve in another cross-section through the two-stage regulator. This
illustrates the position of the pull ring (Fig 2.5, Item 17) on the spool (Fig 2.5, Item 14). The spool
valve is moved from the closed to the open position by pulling the actuation cable. A bullet on the
end of the cable contacts the two ball bearings (Fig 2.5, Item 36) in the centre of the spool, drawing
the valve to the open position. The ball bearings then drop out of the way allowing the bullet to pass
through and away up the cable sheaths.
Gas flow’s from the regulator first stage to the spool (Fig 2.5, Item 14). When the SLS System is in
its stand-by mode, the spool isolates the first stage from the second stage of the regulator. When the
actuation cable is pulled, the spool moves across allowing gas flow to the regulator second stage.
The second stage of the regulator is a diaphragm type. The pin (Fig 2.4, Item 16) is held off the seat
(Fig 2.4, Item 13) by the diaphragm (Fig 2.4, Item 31) and the support plate (Fig 2.4, Item 11) under
the action of the spring (Fig 2.4, Item 19). As the pressure in the space to the right of the diaphragm
increases, the diaphragm and hence the pin moves to the left, sealing off the seat fully at the pre-set
outlet pressure.
The outlet pressure is adjusted by varying the tension of the spring (Fig 2.4, Item 19) by slackening
the locknut (Fig 2.4, Item 22) and adjusting the grub screw (Fig 2.4, Item 23) until the desired outlet
pressure is achieved.
2.3.5 Injection
orifice
The injection orifice (Fig 4.4, Item 3) is shown in cross-section in Fig 2.6. It contains a group of
orifices in series with the flow path making many 90
o
changes in flow direction. The combined effect
is to allow the system to contain much larger holes than there would be for a single orifice with the
same resistance. This therefore reduces greatly the chance of blockage.
Fig 2.6 Injection orifice
2.3.6 Single
stage
regulator
Fig 2.7 shows a cross-section through the single stage regulator.
Содержание Divex SLS Mk IV
Страница 2: ...Intentionally Blank...
Страница 4: ...ii OM131 Approval Sheet P1939 OM 131 R11 Intentionally Blank...
Страница 6: ...iv OM131 Preface P1939 OM 131 R11 Intentionally Blank...
Страница 8: ...vi OM131 List of Abbreviations P1939 OM 131 R11 Intentionally Blank...
Страница 10: ...viii OM131 Warnings P1939 OM 131 R11 Intentionally Blank...
Страница 12: ...x OM131 Table of Contents P1939 OM 131 R11 Intentionally Blank...
Страница 15: ...OM131 3 P1939 OM 131 R11 Chapter 1 Fig 1 1 SLS System Mk IV...
Страница 16: ...4 OM131 Chapter 1 P1939 OM 131 R11 Fig 1 2 SLS system layout...
Страница 32: ...20 OM131 Chapter 2 P1939 OM 131 R11 Fig 2 4 Two stage regulator Fig 2 5 Spool valve...
Страница 42: ...30 OM131 Chapter 2 P1939 OM 131 R11 Intentionally Blank...
Страница 53: ...OM131 41 P1939 OM 131 R11 Chapter 3 Fig 3 3 Hose Lanyards...
Страница 54: ...42 OM131 Chapter 3 P1939 OM 131 R11 Fig 3 4 SLS System Mk IV Rear View...
Страница 55: ...OM131 43 P1939 OM 131 R11 Chapter 3 Fig 3 5 SLS System Mk IV Front View...
Страница 64: ...52 OM131 Chapter 3 P1939 OM 131 R11 Intentionally Blank...
Страница 82: ...70 OM131 Chapter 4 P1939 OM 131 R11 Fig 4 7 Annual Maintenance Two Stage Regulator...
Страница 86: ...74 OM131 Chapter 4 P1939 OM 131 R11 Fig 4 8 Annual Maintenance Single Stage Regulator...
Страница 109: ...OM131 97 P1939 OM 131 R11 Chapter 5 Fig 5 2 Backpack Assembly Drawing P1939229S1...
Страница 111: ...OM131 99 P1939 OM 131 R11 Chapter 5 Fig 5 4 Scrubber Housing Assembly Drawing P1939131S1...
Страница 113: ...OM131 101 P1939 OM 131 R11 Chapter 5 Fig 5 6 SLS System Mk IV Inhale Exhale Duct Assembly Drawing P1939 DG 142...
Страница 115: ...OM131 103 P1939 OM 131 R11 Chapter 5 Fig 5 7 SLS System Mk IV Counterlung Duct Assembly Drawing P1939 DG 159...
Страница 118: ...106 OM131 Chapter 5 P1939 OM 131 R11 Fig 5 9 SLS System Mk IV Gas Schematic Drawing P193940S1...
Страница 123: ...OM131 111 P1939 OM 131 R11 Chapter 5 Fig 5 14 SLS System Mk IV Bottle Assembly...
Страница 125: ...OM131 113 P1939 OM 131 R11 Chapter 5 Fig 5 15 SLS System Rotowink General Assembly Drawing P1939 DG 59...
Страница 127: ...OM131 115 P1939 OM 131 R11 Chapter 5 Fig 5 16 SLS System Mk IV Hot Water System Drawing P1939156S1...
Страница 129: ...OM131 117 P1939 OM 131 R11 Chapter 5 Fig 5 18 Shroud Hot Water Hose Assembly Drawing P1939 DG 83282...
Страница 130: ...118 OM131 Chapter 5 P1939 OM 131 R11 Fig 5 19 SLS System Hot Water Shroud Assembly Drawing B82840...
Страница 132: ...120 OM131 Chapter 5 P1939 OM 131 R11 Fig 5 20 Refillable Canister Assembly Drawing P1939 DG 035...
Страница 133: ...OM131 121 P1939 OM 131 R11 Chapter 5 Fig 5 21 SLS System Mk IV Harness Assembly Drawing P1939137S1...
Страница 134: ...122 OM131 Chapter 5 P1939 OM 131 R11 Fig 5 22 SLS System Mk IV Actuation Cable Assembly Drawing P1939 DG 115...
Страница 135: ...OM131 123 P1939 OM 131 R11 Chapter 5 Fig 5 23 SLS System Mk IV Counterlung Assembly Drawing P1939 DG 56...