Westfalia OSA 7
Self-cleaning centrifugal oil separator (lube oil purifier)
Westfalia OSA 7 is a high-speed disc-stack centrifuge with a self-cleaning bowl, used on board to purify main engine lubricating oil (and other mineral oils). The bowl works as a purifier (oil-water-solids, with a regulating ring that sets the water outlet) or as a clarifier (water-free oil, smallest regulating ring). A hydraulically operated sliding piston opens the bowl for de-sludging in seconds using operating water; a centrifugal clutch and worm gear drive the bowl at 8520 rpm, and an attached gear pump feeds dirty oil. The manual covers technical data, operating principles, start-up, de-sludging and stopping, bowl assembly and dismantling, regulating ring selection, cleaning, lubrication and maintenance schedule, fault finding, gear parts, clutch, motor and the full parts list with part numbers.
I-click ang piyesa sa model para makita ang numero at gamit nito.Buksan ang 3D trainer
Mga maintenance procedure
Starting with the purifier bowl
- Release the brake (handle clockwise), check the bowl turns by hand, close the hood and fit the centripetal pump connection (left-hand thread). p. 29
- Check gear oil is at the upper third of the sight glass. p. 29
- Start the motor and wait 2–5 minutes until the bowl reaches rated speed; watch the revolution indicator. p. 30
- Close the bowl: operating water open 10 s, closed 20 s, then three times open 1 s / closed 10 s. p. 30
- Fill the bowl with warm water until it shows at the water outlet; water from the sludge outlet means the bowl leaks: open operating water 10 s and repeat closing. p. 30
- Heat the bowl with hot fresh water, then throttle make-up water to the amount for the oil type. p. 30Diesel engine lube oil: 2–5 % of throughput
- Heat the oil to separating temperature and open the oil feed; set the clean oil back pressure to 1.5 bar. p. 31
- Check water, oil and sludge outlets for correct bowl function. p. 31
De-sludging the purifier bowl
- In plants without circulation switch off the oil pre-heater; close oil supply and discharge. p. 32
- Open operating water 10 s, close 20 s, then three times open 1 s / close 10 s to re-seal. p. 32
- If solids remain, flush: fill the bowl with hot water and de-sludge again for about 10 s. p. 32
- Restore the water seal with hot water, restart heating and slowly reopen oil discharge and supply; watch water and sludge outlets. p. 32
Stopping the separator (purifier bowl)
- Switch off the oil pre-heater and keep feeding a few minutes; then stop dirty oil supply and close the clean oil discharge. p. 33
- De-sludge, then fill with water and flush de-sludge to clear residual solids; make sure operating water is closed. p. 33
- Close make-up water, switch off the water pre-heater and the motor, apply the brake. p. 33
- Wait until the revolution indicator disc has stopped before loosening any part. p. 33Never open the separator while the bowl is still turning
Assembling the bowl
- Clean all contact surfaces; never mix parts of different bowls; keep all 0 marks in line. p. 34
- Fit gaskets 308 and 304, grease guide surfaces with MoS2 paste + grease (1:4), warm the sliding piston 5 min with hot water and place it on the bowl bottom. p. 35Never heat bowl parts with a torch
- Lower the sealing-chamber bottom with jack 423 until the pin engages; screw in the threaded ring. p. 35
- Place the bowl bottom on the spindle with jack 411, tighten spindle nut 321 (left-hand thread), fit wear liner 305. p. 36
- Stack discs on the distributor in numerical order, fit the separating disc, gasket 326 and centripetal pump. p. 36
- Fit the bowl top with lifting tongs, screw in lock ring 313 by hand (left-hand thread) and tighten with annular wrench 413 until 0 marks align. p. 38
- Fit gasket 318, the selected regulating ring and the small lock ring with hook wrench 422. p. 38
Choosing the regulating ring
- Use a small-diameter ring for heavy oil and a large-diameter ring for light oil; determine it from the density diagram or by trial. p. 39
- Ring too large: oil in the water discharge or broken water seal. Ring too small: water in the clean oil. p. 40
- For clarifier operation fit the smallest ring (45 mm) and never feed water. p. 42
Mga maintenance interval
| Item | Kailan | Gagawin | Manual |
|---|---|---|---|
| Gear chamber oil level | Weekly | Check oil level (not below middle of sight glass) and check for water (milky oil = change now) | p. 54 |
| Gear oil | First 250 h, then every 750 h (max 6 months) | Change oil and clean the gear chamber with kerosene | p. 54 |
| Bowl | 1500 h, never longer than 6 months | Dismantle, inspect and clean bowl, discs and hydraulic bores; check gaskets | p. 47 |
| Operating-water strainer and orifices | 3–6 months | Clean strainer 67 and the small orifices of the operating-water feed | p. 48 |
| Water pre-heater safety valve | At least twice a year | Clean and check | p. 22 |
| Clutch shoes and brake linings | Per maintenance schedule (about 1500–3000 h) | Check starting time and lining thickness; replace before rivets show | p. 53 |
| Spindle bearings, neck bearing springs, gear | Per maintenance schedule (about 6000 h) | Inspect bearings, springs and worm gear | p. 53 |
Mga sira at ang dapat gawin
Bowl does not reach rated speed or takes too longBrake on, wrong motor connection, oily or worn clutch shoes, too few shoes, bowl rubbing the centripetal pump, sludge in upper frame, worm wheel slippingBowl reaches speed in under 2 minutes, high starting currentToo many clutch shoesSeparator runs unevenly / vibratesUneven sludge, wrong assembly or mixed bowl parts, slack disc stack, damaged bowl, weak neck bearing springs, broken bottom bearing spring, worn gearBowl fails to closeClogged feed ducts or discharge nozzle, dirt in opening chamber, damaged gasket in sealing-chamber bottomBowl does not open or opens only partlyToo little operating water, clogged strainer, leaking line, dirt between piston and bowl, loose polyamide gasketIncomplete de-sludgingBowl closed too soon, hardened solids, enlarged piston discharge hole, slack disc stackBowl opens by itself after long separationOperating water in the sealing chamber evaporatedDirty oil at the clean oil outlet (bowl overflow)Rust and heavy impurities in the distributor neckOil in the water dischargeRegulating ring too largeWater in the clean oilRegulating ring too small
Technical specifications
| Bowl speed | 8520 rpm (heavy liquid ≤ 1.0 kg/dm³, solids ≤ 1.4 kg/dm³) | p. 13 |
|---|---|---|
| Bowl starting time | 2–5 minutes | p. 13 |
| Sludge holding capacity | 1.5 dm³ | p. 13 |
| Motor rating | 3 kW (without gear pump), 3.7 kW (with gear pump) | p. 13 |
| Motor speed | 1455 rpm at 50 Hz, 1745 rpm at 60 Hz | p. 13 |
| Gear pump output (40–80 cSt, 1455 rpm) | 840 / 1650 / 3400 l/h (R31/10, R31/20, R41/40) | p. 13 |
| Centripetal pump | 3400 l/h, delivery head 1–2 bar | p. 13 |
| Weight | separator 300 kg, bowl 55 kg, AC motor 63 kg | p. 13 |
| Operating water pressure | 2–3 bar, about 2 l per de-sludging | p. 63 |
| Clean oil back pressure | 1.5 bar (up to 2 bar) | p. 31 |
| Gear chamber oil | about 1.2 l, gear oil C100 (DIN 51517) | p. 54 |
| Separating temperature, diesel engine lube oil | 75–90 °C, make-up water 2–5 % of throughput | p. 26 |
| Separating temperature, HFO 380 cSt | 95–98 °C | p. 96 |
| Revolution indicator at full speed | 65 rpm (1455 rpm motor), 78 rpm (1745 rpm motor), ±5 % | p. 52 |
| Bowl height | 80–82 mm from inner frame wall edge to bowl bottom edge | p. 67 |
| Sliding piston discharge nozzle | 1.2 mm diameter | p. 61 |
Spare parts at catalogue number
| Piyesa | Numero | Dami | Manual |
|---|---|---|---|
| Bowl, complete | 2168-6600-000 | 1 | p. 88 |
| Threaded ring | 2171-6627-000 | 1 | p. 88 |
| Sealing chamber bottom, complete | 2171-6425-000 | 1 | p. 88 |
| Gasket 209/225x6 | 0007-2421-750 | 1 | p. 88 |
| Wear liner | 3205-6490-000 | 1 | p. 88 |
| Sliding piston, complete | 2171-6500-060 | 1 | p. 88 |
| Gasket 242/258x6 | 0007-2420-750 | 1 | p. 88 |
| Polyamide gasket 264x8.2 | 0007-2855-840 | 1 | p. 88 |
| Gasket 235/7 | 0007-2084-750 | 1 | p. 88 |
| Bowl bottom, complete | 3205-6604-020 | 1 | p. 88 |
| Bowl lock ring | 3205-6631-000 | 1 | p. 88 |
| Distributor, complete | 2171-6620-000 | 1 | p. 88 |
| Gasket 100/5 | 0007-2583-750 | 1 | p. 88 |
| Set of regulating rings | 2171-6691-000 | 1 | p. 88 |
| Set of discs | 2171-6660-000 | 1 | p. 88 |
| Disc | 2171-6663-000 | p. 88 | |
| Compensating disc | 2171-6666-000 | 1 | p. 88 |
| Separating disc | 2168-6650-000 | 1 | p. 88 |
| Bowl top | 2168-6611-010 | 1 | p. 88 |
| Gasket 71/4.5 | 0007-2057-750 | 1 | p. 88 |
| Centripetal pump | 2171-2213-000 | 1 | p. 88 |
| Clutch shoe | 3033-3397-000 | 2–4 | p. 84 |
| Centrifugal clutch assembly | 3033-3385-020 | 1 | p. 84 |
| Grooved ball bearing 6206 | 0011-6206-000 | 2 | p. 84 |
| Worm spindle assembly (50 Hz) | 2162-3429-000 | 1 | p. 87 |
| Worm spindle assembly (60 Hz) | 2162-3429-010 | 1 | p. 87 |
| Worm wheel assembly (50 Hz) | 2162-3449-000 | 1 | p. 87 |
| Worm wheel assembly (60 Hz) | 2162-3449-010 | 1 | p. 87 |
| Pendulum ball bearing 1303 | 0011-1303-030 | 1 | p. 82 |
| Grooved ball bearing 6207 | 0011-6207-010 | 1 | p. 82 |
| Spindle spring | 0006-4226-160 | 1 | p. 82 |
| Bottom bearing assembly | 0010-3000-000 | 1 | p. 82 |
| Brake lining | 0021-4094-860 | 1 | p. 78 |
| Operating-water strainer insert | 0018-2523-300 | 1 | p. 78 |
| Revolution indicator assembly | 2162-3495-000 | 1 | p. 76 |
| Sight glass | 0001-0006-640 | 1 | p. 76 |
Pinagmulan: manual ng gumawa na “NEW ME L.O PURIFIER MANUAL.PDF”, 96 pahina. Ang numero ng pahina ay ayon sa orihinal. Suriin ang manual sa barko bago magtrabaho.
Awtomatikong isinalin ang pahinang ito. Ang part number, code at pahina ay ayon sa orihinal.