Nakakita NS 705D

Nakakita intrinsically safe solenoid valve NS705-D

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Methods of finding TDC (top dead centre) of a diesel engine.

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It is very important to knw the top dead centre of a unit to : 1. set the tappet clearence , 2. to check the fuel pump timing, 3. To check the misalignment of engine if new crankshaft  fitted or if slippage  of crankshaft happens. 4. To fit the timing gears also. HOW TO FIND OR CHECK THE TDC OF A UNIT. We can find the TDC by using following methods: 1. THROUGH THE FLYWHEEL MARKINGS.  It is the best method to find the position of particular unit at TDC and BDC as there are markings on flywheel for TDC andBDC  and a few degrees like 5,10,15 of that particular unit and so on or as IO ,EC and IS as inlet valve opens , exhaust valve closes. And injection starts. There is a arrow or a stationary marking  attached to fixd plate or frame anf pointed towards the flywheel markings , the pointer and markings on flywheel shows the unit number and its poaition at TDC. As if all the markings are gone then in some type of engines there is marking on crankweb of num...
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What is SIPWA ?

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Full form of SIPWA is sulzer integerated piston wear analysis. It is the system developed by sulzer to determine the continously average radial wear of the top piston ring. The top piston ring is called SIPWA ring fitted in top groove , and one sensor fitted on liner can be seen through inspection hole on pod level , it also consist of one angle decoder on cranlshaft whole systen is connected to electronic unit called solis state electronic unit, one recorder to record the reading one for every 4 unit , and one printer to print the result. Diagram of SIPWA is shown as.
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Cleaning methods of fresh water generator.

For cleaning fresh water generator we have to drain sea water from the condenser and evaporator , also fill the drum with water and then add the appropriate chemical e.g saf acid and gamlen xd .fresh water generator can be cleaned by . SUBMERGED CLEANING. In this method pour the solution into the evaporator through sight hole until the upper tube plate is soaked , cleaning time varies with the scale thickness , when the solution becomes saturated change the chemical solution to new solution . In this method we have to clean the condenser separately by opening the side holes and using the wire brush and nylon brush to clean the tubes from inside. After cleaning drain the chemical solution and flush the evaporator why the seawater through the feed line. CIRCULATED CLEANING. In this method we have to use wilden pump to pump the solution into the fresh water generator there is a taping given before the condenser or open the flange to the inlet of condenser then connect the outlet of...
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