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08/09 Ed., Rev. B

Page 9of 16

out, and/or wear the graphite quickly. First, visually inspect the rotor for surface finish, nicks,

or scrapes. If it appears in good shape it should be tested. Run a new vane through each

slot by hand. It should slide freely through each slot. Assemble the rotor with the vanes,

pins(if applicable), liner, and flanges. The rotor should spin smoothly and easily by hand. If it

feels like its scraping the graphite, or if it becomes particularly difficult to turn through part of

the revolution, the problem needs to be addressed before proceeding. Separate the rotor

from the graphite and look for scrape marks as an indication of where the problem lies.

Sometimes the rotor can be salvaged if it’s just a very small nick or galled particle causing the

issue. Try carefully using a file to smooth the area causing the problem. Retest the rotor in

the graphite. If it seems smooth, proceed to the next step.

Содержание ROTOFLOW

Страница 1: ...9 Ed Rev B Page 1of 16 Fluid O Tech PUMP TECHNOLOGY AT ITS BEST WWW FLUID O TECH COM Office 161 Atwater St Plantsville CT 06479 Phone 860 276 9270 Fax 860 620 0193 ROTOFLOW ROTARY VANE PUMP REBUILD MA...

Страница 2: ...e 2of 16 Contents 1 Materials Needed 2 Disassembly 3 Inspection 4 Reassembly 5 Testing 6 Rebuild Specifications CAUTION Proper safety precautions should always be observed Always wear proper eye prote...

Страница 3: ...ng ring or spanner wrench if your pump has a screw on cap 2 Arbor press Arbor press with at least 12 of clearance underneath the ram 3 Metal Rod Rod to press out the shaft It should be about 4 in diam...

Страница 4: ...c rod for pressing the counterface in place Nylon is ideal and should be about 1 1 The end should be flat and squared 7 Plastic tube Plastic tube to press the seal onto the shaft It should have a flat...

Страница 5: ...f 440 and an OD greater than m 1 25 Note that this tube must contact the inner and outer ring of the bearing otherwise the bearing could be damaged upon install 10 Blocks or supports Blocks or support...

Страница 6: ...be held several inches above the work surface of the arbor press otherwise it will be difficult to fully press the rotor out Make sure nothing is obstructing the graphite flanges and rotor from being...

Страница 7: ...onents from being pushed out of the body Now use the metal rod material 5 to press out the washer counterface and any remaining pieces Be sure that the rod presses only on the washer and not on the sm...

Страница 8: ...out before proceeding 2 Bypass The bypass acorn nut can be removed to check the condition of the bypass valve and seat Remove the nut and components and start by checking the bypass valve The tapered...

Страница 9: ...smoothly and easily by hand If it feels like its scraping the graphite or if it becomes particularly difficult to turn through part of the revolution the problem needs to be addressed before proceedi...

Страница 10: ...two pins these are used in all 70 400 series pumps and in only Viton versions of the 500 1000 series pumps Verify that they are both the same length Using tweezers insert the two pins into the center...

Страница 11: ...you will want to set the graphite rotor assembly aside and locate the stainless washer and the counterface Position the pump body on the table with its bearing end facing down Place the washer inside...

Страница 12: ...groove apply a little more pressure with the arbor press to allow the ring to further seat itself It is then important to squeeze the ring against the rim in several spots around the perimeter with th...

Страница 13: ...08 09 Ed Rev B Page 13of 16 the screw back into the acorn nut returning it to the desired setting If you want to test the bypass setting refer to the section Testing below...

Страница 14: ...s check the following the fittings are sealed in the ports properly the bypass is screwed on tightly and has a nylon washer the hoses in the tank are well below the surface of the water and not too cl...

Страница 15: ...inable pressure close off the ball valve all the way while closely monitoring the pressure gauge to make sure it doesn t go above 240psi and take a pressure reading Turn the screw clockwise to increas...

Страница 16: ...ters 070 32 7mm 100 32 9mm 150 33 3mm 200 33 7mm 250 34 1mm 300 34 4mm 350 34 8mm 400 35 2mm Pin Lengths 070 16 2mm 100 16 2 mm 150 16 5mm 200 16 9mm 250 17 2mm 300 17 6mm 350 17 9mm 400 18 1mm Max Sh...