Hi,
I would like to know " what is the max. nitrogen gas pressure in Hydraulic Accumulator for Vertical roller mill - hydraulic cylinder.
Max. Grinding pressure( Hydraulic): 190 bar , as standard formula that nitrogen gas pressure = 0.75 times of Hydraulic pressure , i.e means nitrogen ras pressure is equal to 140 bar, is it advisable to use this range of pressure in VRM's...?
kindly clarify...
regards,
dhanu
Dear dhanu.
Max N2 press in accumulators is derived according to manufacturer's allowance.
Accrding to Gebr. Pfeiffer, we have formula as follows
Max N2 P = 0.66 Grind P
Min N2 P= 0.33 Grind P
Opt N2 P = 0.50 Grind P
So i m sure about this but if your mill is other than Gebr. Pfeiffer then u must first contact manuacturer before making any change. These limits can also be seen in manuals supplied by respective company. Make sure not to exceed design limits.
Thanx. Have a nice day
EngrS