Double Oil Case High Efficiency Roots Vacuum Pump

Double Oil Case High Efficiency Roots Vacuum Pump

We make all types of roots blower, centrifugal blower, Our Main items are as under:

Type Diameter Fee of circulation Pressure
ESR-MJ(Intensive Variety) Φ50~Φ300mm .5~140m³/min 9.8KPa~98.8Kpa
ESR(Normal Sort) Φ50~Φ350mm .five~140m³/min nine.8KPa~78.4Kpa
ESR-H(Higher-stress Kind) Φ50~Φ350mm .7~160m³/min fifty eight.8KPa~ninety eight.8Kpa
ESR-V(Vacuum Pump) Φ50~Φ350mm .5~160m³/min nine.8KPa~fifty three.3Kpa
EL Collection Φ200~Φ600mm 20.three~750m³/min nine.8KPa~fifty eight.8Kpa
Multistage Centrifugal Blower
or C-Collection
Φ250~Φ500mm 50~500m³/min 9.8KPa~98Kpa
ERR-ERG Sort Φ250~Φ500mm one hundred twenty~420m³/min 9.8KPa~ninety eight.8Kpa

The doing work principle of the 3-blade roots blower: two 3-lobed rotors are arranged in the cavity, and the
suction port and the discharge port are opened on both sides of the cavity. By means of the action of a pair of
synchronous gears, the two rotors rotate in reverse instructions and Relying on the mutual engagement of the two
rotors, the suction port and the discharge port are isolated, and the gasoline in the chamber is pushed to accomplish the
objective of blowing.

Attribute of our roots blower:
one. Huge adjustment of the air quantity
2. Reduced Sound
three. Substantial effectiveness
4. Reduced energy cosumption
five. Prolonged time daily life
six. Dependable running, easy upkeep,tiny footprint

The parameters of our roots blower:

Sort Ratary Pace
Pressure Increase
Shaft Electricity
Motor Unit Maximn
Excess weight(Kg)
Electrical power
ESR-fifty 1100-2120 9.8-58.eight .65-two.fifty eight .three-three.54 .75-four 128-158
ESR-sixty five 1100-2130 nine.eight-fifty eight.8 .ninety four-three.sixty six .38-4.forty six .75-five.5 one hundred fifty five-185
ESR-80 1140-1900 9.eight-fifty eight.8 2.34-5.43 one.04-seven.forty two two.2-11 one hundred fifty five-277
ESR-100 1060-1980 nine.eight-58.8 four.fifty seven-nine.05 one.35-twelve.fifteen three-fifteen 309-377
ESR-125 980-1850 nine.8-fifty eight.eight 5.35-12.four one.65-five.19 five.five-eighteen.5 408-451
ESR-125C 970-1830 9.eight-58.8 seven.5-seventeen.fifty seven 3.two-eighteen.5 4-22 408-451
ESR-a hundred and fifty 810-1730 nine.eight-58.eight ten.37-27.15 3.84-40.82 seven.five-forty five 688-848
ESR-175 970-1520 nine.eight-fifty eight.eight 19.65-36.sixty five seven.2-45.ninety five 11-fifty five 980-1080
ESR-200B 740-1450 9.8-fifty eight.eight 19.65-44.eight ten.15-sixty.44 15-seventy five 1272-1546
ESR-200 810-1480 nine.8-fifty eight.eight 27.65-fifty nine.two eight.05-eighty,12 fifteen-ninety 1272-1546
ESR-250B 1100-1480 nine.eight-fifty eight.eight 54.77-77.fifty five 19.97-90.97 30-one hundred ten 1490-2454
ESR-250 990-1480 nine.eight-fifty eight.8 61.four-ninety seven.52 30-132 1490-2454
ESR-300 990-1480 9.eight-58.eight 26.4-167.8 37-185 3326-3446
ESR-350 730-1480 9.8-58.eight seventy eight.41-177.31   fifty five-250  
ESR-50H 1230-2120 sixty three.7-98 .45-2.02 two.05-6.12 three-seven.5 160–one hundred seventy
ESR-65H 1240-2130 sixty eight .78-2.53 2.89-seven.55 4-eleven 198-230
ESR-80H 1140-1900 sixty three.7-98 1.82-four.fifty five 5.five-15 316-326
ESR-100H 1060-1980 sixty three.7-98 two.sixty five-eight.06 6.36-seventeen.2 seven.five-22 398-459
ESR-125H 980-1850 eight four.64-11.23 8.92-24.two eleven-30 544-630
ESR-150H 810-1730 63.7-98 9.fifty three-25.76 17.sixteen-65 eighteen.five-75 752-1571
ESR-200H 810-1480 sixty three.7-ninety eight 25.34-fifty six.92 forty two.34-a hundred and twenty 55-132 1426-1934
ESR-250H 990-1480 58-93.7 eighty three.2-205 90-220 2980-3468
ESR300H 990-1480 eight 86.9-134.1 114.7-270 132-280 3476-3998
ERF-245 650-980 9.8-ninety eight 47.five-97.four 16-183 18.five-two hundred 3630-3690
ERF-250 650-980 nine.eight-ninety eight 61.6-120.4 19-227 22-250 4450-4500
ERF-290 650-980 9.eight-seventy eight.4 92.3-128 22-213 thirty-250 4890-4710
ERF-295 650-980 nine.8-seventy eight.4 ninety seven.3-152.5 23-227 30-250 4890-4880
ERF-297 650-980 9.eight-78.four 87.5-167.6 26-249 thirty-280 5330-5520
ERF-three hundred 650-980 nine.eight-78.4 one zero 29-278 37-315 5330-5520
ERF-350 650-980 9.eight-seventy eight.four 126-224.9 34-249 forty five-280 5210-6470
ERG-300 590-730 nine.8-98 128.three-196 38-362 forty five-four hundred 9440-15710
ERG-350 590-730 9.eight-98 159.three-231.six forty three-420 fifty five-450 9700-1571
ERG-400 590-730 9.eight-eighty three.3 fifty two-449 seventy five-five hundred 10090-11390
ERG-445 590-730 9.8-seventy three.5 fifty eight-477 75-560 10600-12230
ERG-450 590-730 nine.8-73.five 262.four-366.2 64-496 seventy five-560 10600-12230
ERG-500 590-730 nine.8-sixty three.7 327.four-452.4 seventy eight-529 90-560 12790-14620
ERF-240-V 650-980 -9.8- -49 eight thirteen-seventy six 18.five-90 3420-3285
ERF-245-V 650-980 -9.eight- -49 forty seven.5-97.four sixteen-ninety five 22-a hundred and ten 3425-3360
ERF-250-V 650-980 -nine.8- -forty nine sixty three-one hundred twenty 19-117 22-132 3910-3830
ERF-290-V 650-980 -9.eight- -49 72.six-144 22-136 30-160 4415-4270
ERF-295-V 650-980 -9.eight- -49 76.6-152 23-145 30-160 4425-4485
ERF-297-V 650-980 -nine.8- -forty nine eighty four.3-166.eight 26-160 thirty-one hundred eighty 5000-4980
ERF-300-V 650-980 -9.eight- -49 97-192 29-178 37-200 5000-4980
ERF-350-V 650-980 -nine.8- -49 116-225 34-209 forty five-250 5400-5700
ERG-300V 590-730 -9.eight- -forty nine 133-193 38-184 45-220 7800-9100
ERG-350V 590-730 -nine.eight- -forty nine 163-231 43-216 55-250 9500-9470
ERG-400V 590-730 -nine.8- -forty nine 199-290 52-269 75-315 9900-10130
ERG-445V 590-730 -9.eight- -forty nine 224.eight-326.9 58-303 seventy five-355 9900-10130
ERG-450V 590-730 -nine.eight- -49 255-365 sixty four-335 75-four hundred 11230-11300
ERG-500V 590-730 -9.8- -forty nine 314-452 78-412 132-450 13630-13850
ERF-245W 650-980 -13.three- -fifty three.three fifty three.five-101 21.five-102 thirty-110 3630-3360
ERF-250W 650-980 -thirteen.three- -53.3 sixty nine-127 26.5-127 30-160 3985-4115
ERF-290W 650-980 -thirteen.three- -fifty three.three 82.six-one hundred fifty 30.five-149 37-185 4340-4580
ERF-295W 650-980 -thirteen.three- -53.3 87-158 32-158 37-185 4440-4580
ERF-297W 650-980 -thirteen.3- -fifty three.3 95-174 36-174 45-200 5230-5130
ERF-300W 650-980 -thirteen.3- -fifty three.3 109-195 forty-193 fifty five-220 5230-5130
ERF-350W 650-980 -13.three- -53.three 129-230 50-230 75-250 5840-5670
ERG-300W 590-730 -13.3- -fifty three.three 142-197 fifty two-201 75-220 9100-9000
ERF-350W 590-730 -13.3- -53.3 168-234.4 fifty nine-235.five 75-280 9500-9600
ERG-400W 590-730 -thirteen.three- -fifty three.three 220-276.6 seventy one-292 ninety-315 9900-10130
ERG-445W 590-730 -thirteen.three- -fifty three.three 244-294.six 82-331 90-four hundred 11230-11300
ERG450W 590-730 -thirteen.3- -fifty three.3 275-368.five ninety one-366 110-400 11230-11300
650-980 ninety eight-196 64.eight-112 one hundred thirty five-355 one hundred sixty-four hundred 8700-8600
650-980 98-196 eighty.8-139 167-439 185-500 9200-9100
ETRF-three hundred
650-980 98-176.four 102-174 206-497 250-560 10320-10500
650-980 98-137.two 124-207 241-473 280-560 10700-11110
ETRG-four hundred
590-740 ninety eight-176.four 205-273 380-773 450-900 21350-24200
590-740 98-176.4 263-428 476-955 560-1000 24200-27600
650-980 -fifty three.3–eighty seventy two-121 75.6-121 ninety-160 6100-6470
650-980 -fifty three.3–80 93.eight-154 99.5-186 a hundred and ten-220 7000-6400
(2505/three hundred)
650-980 -fifty three.three–80 116-189 115-220 132-250 7750-7760
EL81WD 580-980 nine.eight-58.eight 54.two-one hundred thirty 18-151 forty five-185 3595
EL82WDB 580-980 9.eight-58.eight seventy two.eight-161 22-191 45-220 3860
EL83WDA 580-980 nine.8-58.nine 101-213 28.5-202 45-220 4300
EL84WDA 580-980 nine.eight-fifty eight.eight 129-267 35.four-252 45-280 4720
EL93WDA 580-730 9.eight-forty nine 230-329 56.four-311 75-355 7765
EL94WDA 580-730 9.eight-forty nine 263-373 64-353 75-400 8130
EL95WDA 490-580 nine.eight-fifty eight.eight 308-434 eighty one.4-414 90-450 11500
EL96WDA 580 fifty eight.8 381 497 560 11500
E397WN a thousand-1650 40 five-nine      
E408WN 870-1650 40 ten-22      
E517WN 980-1580 40 20-30      
E520WN 930-1550 40 24-45      
E607WN 750-1250 forty 45-seventy six      
E610WN 750-1250 40 seventy five-130      

Spare elements and composition of our roots blower:

Package deal of our Roots Blower

Pack into iron scenario, two layer,blower entire body and motor in lower layer, inlet/out silencer and many others in upper layer

Roots blower pack method same as iron scenario, just alter to Fumigation Free of charge Plywood Circumstance

Our factory is a professional company of Roots blowers which has over 20 years’ experience in equipment
producing. It is situated in Xihu (West Lake) Dis. CZPT CZPT Park, fifty kilometers to the east of ZheJiang provincial
funds— HangZhou. Our business also has handy visitors transportation, as it is 15 kilometers absent from
Diaozhen City station of HangZhou-HangZhou expressway, and 30 kilometers away from CZPT HangZhou station of
ZheJiang -ZheJiang expressway.The top solution of our organization is ESR -type Roots Blower. The roots
vacuum pump is a new sort of substantial-performance roots blower, which is developed independently dependent on the
domestic and international innovative systems. Many patented technologies have been adopted on Roots
Blower, and as a result we have produced significant outcomes in strength conservation and noise reduction, and so forth.. So considerably, our
organization has invested much more than thirty,000,000 RMB to introduce these kinds of sophisticated skilled tools as
horizontal machining heart, vertical machining centre, two-way CNC area planer, CNC lathe, CNC milling
device, CNC planer, plane grinder, cylindrical grinding device, and a few coordinates tests device.
Aside from, we have taken different steps to CZPTize the approach circulation these kinds of as operating and cooperating
with many scientific research units, faculties and universities at residence and overseas. We also repeatedly attempt to
absorb and enhance the domestic innovative production technologies, so as to encourage the upgrading and
optimization of the solution and make the merchandise quality reach the advanced degree at house and abroad.
ESR -kind Roots Blower contains numerous sequence such as Three-leaves Sort, Two-leaves Sort and Centrifugal
Variety,which can be even more divided to hundreds of versions. The goods are broadly utilized in sewage treatment,
pneumatic conveying,vacuum packaging, aquaculture, foodstuff processing, electrical electrical power, petrochemical, cement,
mining and other industries. Our items have this sort of rewards as lower sound, energy saving, secure quality,
and lengthy support life, and many others.. With the income outlets throughout the domestic funds cities, our goods promote effectively all
above the region, and have been exported to North CZPTica,Russia, Malaysia, Indonesia, Vietnam, South Africa
and some other nations. Getting received the ISO9001 CZPT CZPT Method Certification, we have
recognized and improved the good quality assurance of the merchandise designing, manufacturing, and installation.
From the approach of style, study and improvement to the completed products, we have received the entire
procedure managed independently, therefore supplying the complete foundation and dependability assure for the goods balance
and longevity. Obtaining a perfect revenue community and after-product sales service, we give our clients with higher-
top quality and much more efficient support.All personnel of our company sincerely welcome the wide masses of pals to
manual, and negotiate company with us.

Our Roots Blower Workshop

         Doosn Horzitonal CZPT Centre

The Application of the Roots Blower

Maintenance and inspection
(one) Examine all fasteners and finding pins problems whether or not they are loosening.
(two) Usually verify no matter whether the leakage phenomenon of the entire body.
(3) Pay interest to lubrication, amount of grease and noises when running,
figure out no matter whether it works underneath the essential problems.
(four) CZPT & grease: The lubricant is for medium load industrial gear oil
(grade 220, kinematic viscosity of 198 ~ 242mm2 / s 40ºC, flash position ≥ 200ºC)
The grease is butter (artificial lithium grease penetration 220-250, fall stage ≥
190ºC). Replace the lubricant and grease following very first 200 hours working, and change
once more after a moth managing. Afterwards, replace the lubricant and grease according to the
atmosphere and lubricant (grease) top quality suggest a ideal replacement for a few
(5) Always examine the inlet air filter, thoroughly clean or exchange the filter in time.
(six) Blower overload often not instantly exhibited, so pay consideration to
the consumption and exhaust force, bearing temperature and the current enhance trends
of motor to establish no matter whether the blower performs normally
(seven) Ahead of disassembling the blower, the assembling relation and dimensions
must be recorded or measured, make marks on components to make certain the CZPT
requirements following assembling.
(eight) When recently machine or overhaul, the oil tank ought to be cleaned before use
and propose exchange all grease following eight several hours working.

Frequent failure reason and troubleshooting

No Failure Attainable reasons Elimination strategies
1 Friction
between the
(1) Impurities on the impeller,
ensuing in the gap is as well small
(2) Equipment dress in, resulting in a
large backlash
(3) The gear is not effectively fastened,
can not preserve the impeller
(four) Bearing wear resulting in
clearance growing.
(1) Remove dust and check out
whether or not there is harm elements
(two) Adjust the gear hole, change
the gears if the gear backlash is
better than the regular 30% to
(3)Re-assemble the gears, preserve
the taper make contact with spot is to 75%
(4)Change the bearing
two Collision
impeller and
wall, the
impeller prime
and casing
(1) Set up gap is not right
(2) operating strain is as well
large, exceeding the specified
(three) Operating temperature is way too large
(4) Casing or foundation deformation,
positioning enthusiast failure
(five) Bearing axial place is not excellent
(one) Adjust the gap
(2) Discover triggers of
overloading, reduced the force
to the specified benefit
(three) Verify the set up
accuracy and decrease the pipe
(4) Examine and mend bearings,
and to guarantee the clearance
3 Temperature
as well high
(one) Oil in tank is way too much, too
thick or as well filthy
(2) CZPT or silencer is blocked
(3)The pressure is larger than
the specified value
(4)Excessive wear of the
impeller, large gap
(5)Inadequate air flow, indoor
temperature is higher, resulting in
inlet air’s higher temperature
(6) The rotating velocity is as well lower,consequence in the belt slipping.
(one)Minimize the oil stage or rely on
(two)Remove of blocking objects
(three)Minimizing the pressure by means of
the blower
(four)Mend its clearance
(five)Open vents to lessen room
(6) Increase speed to prevent the
belt slipping.
4 Inadequate
(one) The inlet filter is blocked
(2) Impeller dress in and the hole
boosts way too a lot
(three) Belt slipping
(4) Large imports strain reduction
(five) CZPT air flow leakage
(1) Cleanse the filter dust and
(2) Restore the hole
(3)Tighten the belt and improve
the quantity of belts
(four)Change the inlet pressure to the
specified price
(5) Verify and fix the pipeline
5 Oil leaking or
oil leaking
into the enclosure
(one)High tank situation result in
leakage from the discharge port
(2) Seal wear, resulting in shaft oil spills
(3) The pressure is increased than
the specified value

(1)Reduce the oil level
(2)Exchange the seals
(3)Very clear the air vents, 2mm diameter faucet is mounted in the
middle chamber, open up the faucet
below the wall
six Irregular
vibration and
(1)Bearing clearance exceeds the
specified value or bearing wear
(2) The equipment backlash is as well
large, not in a limited mounted
(three) The international objects and dust
caused by the impeller and the
impeller, the impeller and the
housing collision
(4) the impeller shaft
deformation caused the collision
brought on by overload,
(5) Friction between the impeller
and the inlet housing triggered by
(six) Unbalance of the impeller
brought on by fouling or overseas
entire body
(7) CZPT bolts or other
fasteners are loosened
(one)Substitute bearings or bearing
(2)Reassemble equipment and make sure
(3)Cleaning blower, verify the
scenario is ruined
(4)Verify the again force, examine
the wheel and modify gap
(five)Check out the filter and back again
strain, enhance the hole
among the impeller inlet and the
(6)Cleanse the impeller and the
casing, to ensure that the impeller
clearance perform
(7) Tighten the anchor bolts and
leveling the base.
seven Motor
(one)When compared with the required
stress, the pressure variation
is big that the back pressure or
the inlet pressure is higher
(2) Compared with the
tools needs, blower
flow is as well massive, so its pressure
(three)Inlet filter is blocked, or outlet
pipe is obstructed or blocked
(4) Collusion or friction (trapped)
rotating parts
(5) The oil amount is way too higher
(six) Slim V-belt is overheat,
vibration is as well massive, or pulley
is also small
(one) Reduce the stress to the
specified price
(two) Exhaust the surplus fuel into
the ambiance or minimize the
blower speed
(3) Eliminate the obstructions
(4)Instantly shut down, check
the explanation
(5) Modify the oil to the correct
(six) Check out the belt rigidity, and
replaced it with big diameter

Our Service

one. Pre offer service                                                                              2. Right after market service                                          
a. recommend the suited model                                             c. on-line complex assist,                                                                                   
b. manufacturing unit tour                                                                              d. whole life spare elements and techinical help


twelve months gurantee for our roots blowers

Double Oil Case High Efficiency Roots Vacuum Pump

Vacuum Pump

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