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SKF Marine GmbH
SHORT TECHNICAL OPERATION MANUAL
SIMPLEX AIRSPACE SM
Rev. 08 – 05.2024
SKF Marine Service 24/7 contact
+49 172 437 47 78
service.marine.de@skf.com
This short manual is intended for Simplex Airspace SM sterntube sealing systems. For further system
information, please read the main installation and operating manual for Simplex Airspace SM.
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Summary of Contents for SKF SIMPLEX AIRSPACE SM
- Page 1 Rev. 08 – 05.2024 SKF Marine Service 24/7 contact +49 172 437 47 78 service.marine.de@skf.com This short manual is intended for Simplex Airspace SM sterntube sealing systems. For further system information, please read the main installation and operating manual for Simplex Airspace SM.
- Page 2 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com Content SKF Marine Service 24/7 contact......................1 System description .......................... 3 General ............................ 3 Air Control Unit........................4 Aft Seal............................. 7 Lub Oil Tank ..........................7 1.4.1 Lub Oil Tank refilling ......................8 Drain Collecting Tank .......................
- Page 3 1. System description 1.1 General SIMPLEX AIRSPACE SM fulfills the fundamental idea to have a separation of the stern tube oil from the seawater. Therefore, AIRSPACE SM is an Air Seal and meet e.g., the EPA VGP 2013 rules and regulations.
- Page 4 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com Aft Seal Forward Seal with forward tank Air Control Unit Lub Oil Tank Drain Collecting Tank 1.2 Air Control Unit The Air Control Unit (CU) is used to regulate the supplied pressure from the vessel for the air chamber of the Aft Seal and the stern tube.
- Page 5 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com Figure 2: Piping diagram of Air Control Unit Figure 3: Air Control Unit and connections Rev. 08 – 05.2024...
- Page 6 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com Main switch (-3V1*) (-3V2*,-3V3) Switching valve to block the air supply and bypass the filter for cleaning (-3F1) Filter unit to clean the supplied air Pressure gauge for supply pressure (-3P1) (-3V4)
- Page 7 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com 1.3 Aft Seal The Aft Seal is located at the aft end of the stern tube, installed between stern tube boss and propeller hub, and is operating in the seawater. The Aft Seal consists essentially of the stationary part, the housing with Ch.l...
- Page 8 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com (Z5) (Z21) high alarm low alarm (Z7) Figure 5: Lub Oil Tank unit The following connections and parts are available: Oil inlet line to stern tube and Aft Seal Ch.lll. Oil return line from stern tube and Aft Seal Ch.lll.
- Page 9 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com 9. Stop pump unit. 10. Close valve Z10 at sump tank 11. Close valve Z20 at gravity line 12. Open valve Z6 and Z8 at L.O.-Tank. 13. Close valve Z5 of L.O.-Tank.
- Page 10 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com 2 Installation All valves for switching from the normal air seal to the oil barrier seal in case of emergency and the other components listed below must be quickly and freely accessible. For this see also the chapter "Emergency behavior".
- Page 11 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com 3 Commissioning 1) Oil filling of Stern Tube and Lub Oil Tank as follow: a. Fill sump tank with oil and put the following valves in the corresponding position: -3V1 close open...
- Page 12 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com cc. Make sure that bottom plug of air Ch.ll is still removed. dd. Open top plugs of seal Ch.l. ee. Fill fresh water into Ch.l. ff. Confirm no water leakage into air Ch.ll after 1 hour.
- Page 13 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com 4 Operation Air Control Unit start-up Please start-up the Air Control Unit only after seal system is oil filled and tested (chapter 0) 1. Check for pressure supply. 2. Close L.O.-Tank vent valve Z5.
- Page 14 + 5 l/min 5 Maintenance The stern tube system should be monitored, maintained and documented using the separate logbook and official instruction and operation manual from SKF. In case of questions, problems and uncertainties, please contact the service department. 5.1 Daily Maintenance...
- Page 15 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com 5.3 Every 6 Months Maintenance ToDo Location How to do it Flush drain line with fresh water Drain line between Aft - Open Drain valve Z18 at Drain Collecting ATTENTION: Carry out only while...
- Page 16 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com -> If Backup line switch over is also not possible, air pipe of inlet and outlet of -3V4 can connect manually with each other to bypass -3V4 Pressure control valve - - Check if pressure -3P1 is above at least 4 bar and you...
- Page 17 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com System Shut-off valve -3V6 in - Check if valve -3V6 is in the right position – pressure -3P4 -3P4 wrong position NO -> put it back in right position at 0 bar...
- Page 18 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com NO-> Check functionality of level sensor LS - Check if Drain Collecting Tank is full of oil YES-> Sealing ring #3 might be damaged. Close Level sensor LS valves Z14 and Z19 of Aft Seal Ch.lll and check L.O.-Tank...
- Page 19 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com #1 and #2 is most likely the cause and the following steps must be taken to protect seawater entering the stern tube bearing. Air pipes to Aft Seal Ch.ll must be closed and the air seal is converted to an Oil Barrier Seal.
- Page 20 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com 3. Immediately switch on the oil pump unit to pump oil from sump tank into oil gravity line to increase the oil pressure in aft seal Ch.lll and stern tube. During emergency operation using the oil gravity line, it must be ensured that the pumps continuously pump oil through the oil gravity line to maintain the increased pressure in Ch.lll of the Aft Seal and...
- Page 21 SHORT TECHNICAL OPERATION MANUAL SIMPLEX AIRSPACE SM www.skf-simplex.com 8 Revision Rev. Page/Ch. Description Date / Dept./Init. creation 20.02.2024 / S211 / NB;KW;MO 12/3; New lubrication diagram added 06.05.2024 / S211 / 15/5.3; Flushing procedure further specified MO;NB 19/7.1; New lubrication diagram added Conversion to emergency mode simplified 20/7.2...
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