Indicator cock valves oil and gas Dubai

Indicator cock valves are part of large two- and four-stroke internal combustion engines. They are used to connect the engine to cylinder pressure, allowing the pressures in each cylinder to be monitored particularly.
An engine indicator is used to calculate the indicated power of the engine, and this is connected to the indicator cock and the cock opens. The indicator is operated as the engine fires when running automatically, the cock being shut before disconnecting the indicator.

Indicator cock valves measure and monitor the cylinder pressure of the diesel engine while the engine is running. This equipment analyzes the condition and effectiveness of the engine. The valve is mounted over each cylinder head of the diesel engine. Through a bore, the indicator valve is connected to the combustion chamber (cylinder).

The indicator cock is opened when the engine is being turned over by the turning gear and when being started for the first time after being shut down to blow out any water or debris from the cylinder. The cock valves are then shut for normal running. 

Watch-keeping duties include checking the cock is not leaking exhaust gas, if it is a temporary cap that can be screwed on, and the cock is replaced at the first opportunity at the next shutdown.

Indicator Cock Valve is available with a lot of options. Indicator cock valves are based on the need to measure and monitor cylinder pressures in diesel and natural gas engines. The indicator cock Valve allows for a reduced installation radius in a limited space The indicator valves open "against engine pressure" and close "with engine pressure". Any movement of the indicator cock valve stem due to engine vibration tends to tighten the valve stem against its seat. The valve body is die-forged.

A three-way cock is so arranged that any steam left in the pipe after making a diagram (indicator card) will be exhausted into the atmosphere when the valve is orbited to interrupt steam from the end of the cylinder

Indicator valves connect the Main Engine Cylinders to sensors that monitor the compression and combustion pressure developed within each unit of the engine in real-time. 

More interestingly the combustion pressure not only tells the engineers on board the power developed by each unit in real-time, but it also integrates with the torque measurement data, the weather data, and the draught sensors to change the amount of fuel injected and its timing. This action maximizes the performance of the engine, reduces air pollution, and reduces the carbon footprint on the ship.

During the engine running, soot and oil accumulate in the indicator bore. Opening the indicator valve for a moment and clean the bore by that. To protect the valve against burning:

•    Open the valve only partially
•    Close the indicator valve after 1 or 2 ignitions.
•    Fitting the Indicator
•    Dismantle the upper part.
•    Give a little cylinder oil to the piston.
•    Otherwise, the parts can be positioned askew, and this causes the piston to move sluggishly in the cylinder. 
•    Mount the upper part.
•    Fit the indicator and the cord.
•    Engage the indicator drive.
•    Check the cord alignment.
•    Adjust the length of the indicator cord so that the diagram is traced in the center of the paper and the cord is tight in all positions.

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