vrm comissioning check ups
DESCRIPTION
Vertical roller mill Pre -Comissioning Check UpsTRANSCRIPT
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Recommended hydraulic fluid with level checking.
Check position of ball valves.
Check and calibrate pressure transmitters.
Remove the entrapped air
Before gear unit oil pump 30-40 min oprn,check oil level
Erection of gear box, pumps, monitoring instruments
Direction of motor
Heat exchanger
Oil tank should be cleaned.
RAW MILL SECTION
Gear Box
Hydraulic system
Equipments outside connections.
Check all control and measuring equipments
Gear unit started -no load, if everything normal - 8 hrs
Check oil quantity for foaming
Check all safety Interlocks with mill drive in test condition
Gear unit oil in quantity and quality
Direction of LP and HP motors
Flushing of hydraulic system before starting.
Voltage of elect. Eqpt should be checked.
Hydro pneumatic accumulators must be charged.
Direction of pump motor
Run the pump for 10 min at zero pr., check oprn of all dir. valves at low pr.
During above test check continuously level, temp and tightness.
Fix the measuring scale.
Adjust the proximity for material bed.
Filters to be cleaned or changed.
Vertical Roller Mill for raw material grinding
Check completion of erection.
Remove all residual materials.
Check the software programme for hydraulic system.
Fill the roller brg with correct oil- quantity and quality.
Check proper seating of rollers in bowl.
Set the roller horizontally.
Adjust the proximity for material bed.
Check and record initial wear profile.
Check motor, GB coupling and direction of motor.
Check water spray, seal air and close all nozzle rings.
Check installation of all measuring instruments.
Crosscheck and reconfirm the hyd sys. logics and interlock with main drive.
Check MD and magnetic separator in feed belt.
Start the mill feed, hyd sys at start pr and make a bed of 30-50 mm.
Check reject divertor.