- This arrangement has another advantage , when the valve is closing , the final steam blowing across the force setup high frictional resistance to closure of valve , this cause boiler pressure to fall below the blow off pressure before the valve closes.This is Blow down effect.
- This causes considerable wastage of steam , the shaped valve seat causes the valve lid to pulsate and this drilling action enables the valve to close properly and sharply with very little blow down effect
Interlocks are provided so that the engine can be started or reversed only when certain conditions have been fulfilled. When there is a remote control of engines, it is essential to have interlocks. This reduces the possibility of engine damage and any hazards to the operating personnel. Turning gear Interlock . This device prevents the engine from being started if the Turning gear is engaged. Running Direction Interlock . This prevents the fuel from being supplied if the running direction of the engine does not match the Telegraph. Starting Air Distributor in end position . This prevents starting from taking place if the shifting of the Distributor has not been completed. Main Lube. oil pressure, Piston cooling pressure, Jacket water pressure, and important parameters must be above the required minimum. Auxiliary Blower Interlock . The Auxiliary Blower is provided in case of Constant pressure turbo charging. Air Spring pressure Interlock . In case of the present generation...
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