centrifugal purifier Flashcards
300gpm purifier basics
- 15-25psifeed inlet pressure
- back pressure of discharge 15-25psi
- bowl speed 4100 rpm
what allows the cover to be opened without disconnecting the pipe?
the cover hinge, inlet, and outlet assembly
what is on the stationary part of the bowl to lock the cover in the open position?
the ratchet hook
what is unique about the feed tube that makes it connect to the paring disc
it has left handed threads.
what is between the pipping and the tube that prevents leakage?
a chevron-shaped, oil resistant rubber seal
what is connected to the bowl by a 3/4in plug valve and steel-braided jacketed flexible hose in the pump room?
a seal-water inlet that directs fresh water into the bowl.
what is the purpose of the spring loaded handle?
screws the feed tube assembly into the paring disk.
what is a sufficient means for properly locking down the bowl cover to the closed position?
hand tight
what does the drive housing contain?
the spindle assembly, direct drive assembly, speed counter, brake, and lube system.
how many sets of ball bearing are there to support the spindle assembly?
3:
- upper upper
- upper lower
- lower
what is between the upper lower and lower sets of ball bearings?
a large verticle spring to reduce vibration.
how many springs are surrounding the upper upper ball bearings?
6 horizontal springs.
what is the horizontal drive shaft supported by?
2 sets of ball bearings, outer and inner.
what is the purpose of the speed counter?
determine the RPM’s of the bowl shell assembly.
At full bowl RPM’s, what should the speed count be at?
between 146-152 per minute.
what is the ration for the bowl speed?
- drive motor: 1770-1775 RPM
- bowl speed: 4100 RPM
- speed counter:146-152 per minute
the driving house is divided by metal partitions into how many compartments?
2:
- direct drive
- gears and bearings
what aid lubrication in the driving house?
the worm wheel is partially submerged in oil to lubricate the gears and bearings.
how much oil can the driving house hold and what type?
8-8 1/2 quarts of grade 90 oil.
what do the two lines represent on the oil sight glass?
top-white(full)
bottom-red(low)
what does the bowl shell assembly consist of?
strainers, disk stack, paring disk, and discharge ring
how many equally spaced drain holes are located at the bottom of the purifier that drains while stopping?
8
how many pins are located in the base of the tubular shaft?
3 unevenly spaced pins that fit into 3 unevely spaces slots at the bottom the bowl assembly.
what provides the liquid passage and gives circular motion to the feed inlet liquid?
12 inner spacers
how many disks are there in the 300GPM purifier
there are 186 numbered with 1 being on the bottom.
after 186 disk’s are added to the purifier, what can you do if it is not tight enough to seal shut?
add more disks on top
how do the disk’s connect to the tubular shaft?
the top part of the inner lip is notched
what disk is larger than all the rest and has no holes on the base?
the top disk
True or False:
the paring disk does not rotate
true
the coupling ring alignment mark cannot pass what point?
20-25 degrees (4 1/2in)
what sizes does the discharge ring range from?
200mm-250mm
the bowl must be cleaned before the wet cake exceeds by how thick?
30 pounds or 1 1/2 in
how often must the bowl be disassembled and cleaned?
every 300 hours of operation
if pitting passes ______ you must replace the bowl.
1/4 in
