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Generator safety

April 18, 2018

1. Reverse current trip
2. Overspeed trip
3. Synchroscope
4. Aromatic voltage regulator

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Marine Electrical

Labels: Marine Electrical

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How to convert purifier into Clarifier ?

May 15, 2018

1. Open up the purifier and place the blind disc at the bottom of disc stack. 2. The water outlet is blocked by seal on the gravity disc. 3. Blank off sealing water inlet line .

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Wire drawing effect

May 17, 2018

Wire drawing effect : It is erosion or scoring of valve seat and disc material of the valve . Causes : 1. Due to differential pressure across the valve . 2. Thermal and mechanical damages . Effects : Valve is unable to isolate the line and fails in sealing . Gas and liquid will leak from the wire and scratch like groove .

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Cross and loop scavenging Disadvantage

July 12, 2018

Cross scavenging Disadvantage 1. It requires longer piston skirt to prevent exhaust gas and air leaks from the ports when piston is at TDC . Loop scavenging Disadvantage 1. Both exhaust port and scavenge port are at the adjacent side of the liner which causes temperature differential problem for the liner material . Hence , we are using mostly the uniflow scavenging which is having very lesser mixing and better scavenging efficiency. Source : DA Taylor