Elt-300A High Efficiency Low Engergy Roots Vacuum Pump

We make all types of roots blower, centrifugal blower, Our Principal products are as underneath:

Variety Diameter Fee of movement Stress
ESR-MJ(Intensive Type) Φ50~Φ300mm .five~140m³/min 9.8KPa~ninety eight.8Kpa
ESR(Ordinary Type) Φ50~Φ350mm .5~140m³/min nine.8KPa~seventy eight.4Kpa
ESR-H(Substantial-force Type) Φ50~Φ350mm .seven~160m³/min 58.8KPa~98.8Kpa
ESR-V(Vacuum Pump) Φ50~Φ350mm .5~160m³/min nine.8KPa~53.3Kpa
EL Sequence Φ200~Φ600mm 20.three~750m³/min 9.8KPa~58.8Kpa
Multistage Centrifugal Blower
or C-Collection
Φ250~Φ500mm 50~500m³/min 9.8KPa~98Kpa
ERR-ERG Kind Φ250~Φ500mm one hundred twenty~420m³/min nine.8KPa~ninety eight.8Kpa

The doing work principle of the 3-blade roots blower: two 3-lobed rotors are organized in the cavity, and the
suction port and the discharge port are opened on equally sides of the cavity. By way 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 gas in the chamber is pushed to attain the
objective of blowing.

Attribute of our roots blower:
1. Large adjustment of the air volume
two. Lower Sound
three. Substantial effectiveness
four. Lower strength cosumption
5. Lengthy time lifestyle
6. Reputable managing, effortless servicing,little footprint

The parameters of our roots blower:

Kind Ratary Speed
Pressure Rise
Shaft Electricity
Motor Unit Maximn
ESR-fifty 1100-2120 9.eight-fifty eight.eight .65-two.fifty eight .three-three.54 .seventy five-4 128-158
ESR-65 1100-2130 nine.8-fifty eight.8 .ninety four-three.66 .38-four.46 .75-5.5 one hundred fifty five-185
ESR-eighty 1140-1900 9.8-58.eight two.34-five.forty three 1.04-7.forty two two.two-11 a hundred and fifty five-277
ESR-a hundred 1060-1980 9.8-58.8 four.57-nine.05 1.35-12.15 3-fifteen 309-377
ESR-a hundred twenty five 980-1850 9.8-fifty eight.eight five.35-twelve.4 one.sixty five-five.19 5.five-18.5 408-451
ESR-125C 970-1830 9.8-58.8 7.5-17.57 three.2-18.five four-22 408-451
ESR-150 810-1730 nine.8-58.8 10.37-27.15 3.eighty four-forty.82 7.five-45 688-848
ESR-a hundred seventy five 970-1520 nine.8-fifty eight.8 19.sixty five-36.sixty five seven.two-45.95 eleven-55 980-1080
ESR-200B 740-1450 9.eight-fifty eight.8 19.sixty five-forty four.8 10.15-sixty.forty four 15-seventy five 1272-1546
ESR-200 810-1480 nine.8-58.eight 27.sixty five-fifty nine.2 eight.05-80,12 fifteen-90 1272-1546
ESR-250B 1100-1480 nine.8-fifty eight.8 fifty four.77-seventy seven.55 19.ninety seven-90.97 thirty-one hundred ten 1490-2454
ESR-250 990-1480 9.eight-58.eight sixty one.4-97.fifty two twenty.1-117.3 30-132 1490-2454
ESR-300 990-1480 9.8-58.8 87.one-138.1 26.4-167.8 37-185 3326-3446
ESR-350 730-1480 9.8-fifty eight.eight seventy eight.41-177.31   55-250  
ESR-50H 1230-2120 sixty three.seven-ninety eight .45-2.02 2.05-six.12 3-seven.five one hundred sixty--one hundred seventy
ESR-65H 1240-2130 sixty three.seven-98 .78-2.fifty three two.89-seven.55 four-11 198-230
ESR-80H 1140-1900 sixty three.7-ninety eight 1.82-four.55 four.09-ten.one 5.five-fifteen 316-326
ESR-100H 1060-1980 63.seven-ninety eight two.65-8.06 6.36-17.two 7.five-22 398-459
ESR-125H 980-1850 sixty three.seven-98 4.64-eleven.23 8.92-24.2 11-30 544-630
ESR-150H 810-1730 63.7-ninety eight 9.fifty three-twenty five.76 seventeen.sixteen-65 eighteen.five-seventy five 752-1571
ESR-200H 810-1480 sixty three.7-98 twenty five.34-fifty six.ninety two 42.34-one hundred twenty 55-132 1426-1934
ESR-250H 990-1480 63.7-ninety eight 58-93.7 eighty three.2-205 90-220 2980-3468
ESR300H 990-1480 63.7-98 86.9-134.1 114.7-270 132-280 3476-3998
ERF-245 650-980 9.8-ninety eight forty seven.five-ninety seven.four 16-183 18.5-200 3630-3690
ERF-250 650-980 9.8-ninety eight 61.6-120.4 19-227 22-250 4450-4500
ERF-290 650-980 nine.8-78.four ninety two.three-128 22-213 30-250 4890-4710
ERF-295 650-980 nine.eight-78.4 ninety seven.3-152.five 23-227 thirty-250 4890-4880
ERF-297 650-980 9.eight-seventy eight.4 87.5-167.6 26-249 30-280 5330-5520
ERF-300 650-980 9.eight-78.4 101.5-188.seven 29-278 37-315 5330-5520
ERF-350 650-980 9.8-seventy eight.4 126-224.nine 34-249 forty five-280 5210-6470
ERG-three hundred 590-730 nine.8-ninety eight 128.three-196 38-362 forty five-four hundred 9440-15710
ERG-350 590-730 nine.8-98 159.3-231.6 43-420 55-450 9700-1571
ERG-four hundred 590-730 nine.8-83.three 203.1-290.9 52-449 seventy five-500 10090-11390
ERG-445 590-730 9.8-seventy three.5 229.7-327.eight 58-477 seventy five-560 10600-12230
ERG-450 590-730 nine.eight-73.5 262.four-366.2 sixty four-496 seventy five-560 10600-12230
ERG-five hundred 590-730 nine.eight-sixty three.7 327.four-452.4 78-529 ninety-560 12790-14620
ERF-240-V 650-980 -nine.8- -forty nine 38.1-78 13-76 18.five-ninety 3420-3285
ERF-245-V 650-980 -nine.8- -49 47.5-ninety seven.four sixteen-95 22-a hundred and ten 3425-3360
ERF-250-V 650-980 -9.8- -49 63-a hundred and twenty 19-117 22-132 3910-3830
ERF-290-V 650-980 -9.eight- -49 72.6-one hundred forty four 22-136 30-a hundred and sixty 4415-4270
ERF-295-V 650-980 -9.8- -forty nine seventy six.6-152 23-one hundred forty five thirty-a hundred and sixty 4425-4485
ERF-297-V 650-980 -nine.8- -49 84.3-166.8 26-a hundred and sixty thirty-a hundred and eighty 5000-4980
ERF-300-V 650-980 -nine.8- -forty nine ninety seven-192 29-178 37-200 5000-4980
ERF-350-V 650-980 -9.eight- -forty nine 116-225 34-209 forty five-250 5400-5700
ERG-300V 590-730 -9.eight- -forty nine 133-193 38-184 forty five-220 7800-9100
ERG-350V 590-730 -9.eight- -49 163-231 forty three-216 55-250 9500-9470
ERG-400V 590-730 -nine.8- -49 199-290 52-269 75-315 9900-10130
ERG-445V 590-730 -nine.eight- -forty nine 224.8-326.9 58-303 seventy five-355 9900-10130
ERG-450V 590-730 -nine.8- -49 255-365 64-335 75-400 11230-11300
ERG-500V 590-730 -nine.8- -forty nine 314-452 seventy eight-412 132-450 13630-13850
ERF-245W 650-980 -thirteen.three- -53.three 53.5-101 21.five-102 thirty-one hundred ten 3630-3360
ERF-250W 650-980 -13.3- -53.3 sixty nine-127 26.five-127 30-one hundred sixty 3985-4115
ERF-290W 650-980 -13.3- -53.3 eighty two.six-one hundred fifty thirty.five-149 37-185 4340-4580
ERF-295W 650-980 -thirteen.three- -fifty three.3 87-158 32-158 37-185 4440-4580
ERF-297W 650-980 -13.three- -53.three ninety five-174 36-174 45-two hundred 5230-5130
ERF-300W 650-980 -13.3- -53.three 109-195 40-193 55-220 5230-5130
ERF-350W 650-980 -thirteen.3- -53.3 129-230 50-230 seventy five-250 5840-5670
ERG-300W 590-730 -13.3- -fifty three.3 142-197 52-201 75-220 9100-9000
ERF-350W 590-730 -13.three- -fifty three.three 168-234.4 fifty nine-235.five 75-280 9500-9600
ERG-400W 590-730 -thirteen.three- -53.3 220-276.six seventy one-292 90-315 9900-10130
ERG-445W 590-730 -thirteen.three- -53.three 244-294.6 82-331 90-400 11230-11300
ERG450W 590-730 -thirteen.3- -53.three 275-368.5 ninety one-366 110-400 11230-11300
650-980 ninety eight-196 sixty four.eight-112 135-355 one hundred sixty-400 8700-8600
650-980 ninety eight-196 80.eight-139 167-439 185-five hundred 9200-9100
ETRF-three hundred
650-980 ninety eight-176.4 102-174 206-497 250-560 10320-10500
650-980 ninety eight-137.2 124-207 241-473 280-560 10700-11110
ETRG-four hundred
590-740 ninety eight-176.four 205-273 380-773 450-900 21350-24200
590-740 ninety eight-176.four 263-428 476-955 560-1000 24200-27600
650-980 -53.3--80 72-121 seventy five.six-121 90-a hundred and sixty 6100-6470
650-980 -53.3--eighty ninety three.eight-154 99.five-186 110-220 7000-6400
650-980 -53.3--eighty 116-189 115-220 132-250 7750-7760
EL81WD 580-980 nine.eight-fifty eight.8 fifty four.2-one hundred thirty eighteen-151 45-185 3595
EL82WDB 580-980 nine.eight-fifty eight.8 72.8-161 22-191 forty five-220 3860
EL83WDA 580-980 nine.8-58.nine one hundred and one-213 28.5-202 forty five-220 4300
EL84WDA 580-980 nine.8-58.8 129-267 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 sixty four-353 75-400 8130
EL95WDA 490-580 9.eight-58.eight 308-434 eighty one.four-414 ninety-450 11500
EL96WDA 580 fifty eight.8 381 497 560 11500
E397WN 1000-1650 40 5-9      
E408WN 870-1650 40 10-22      
E517WN 980-1580 forty twenty-30      
E520WN 930-1550 40 24-45      
E607WN 750-1250 40 forty five-76      
E610WN 750-1250 forty 75-one hundred thirty      

Spare areas and structure of our roots blower:

Package of our Roots Blower

Pack into iron case, two layer,blower physique and motor in reduce layer, inlet/out silencer and many others in upper layer

Roots blower pack approach same as iron case, just change to Fumigation Free Plywood Situation

Our factory is a skilled maker of Roots blowers which has above twenty years' experience in equipment
production. It is situated in Xihu (West Lake) Dis. East CZPT Park, 50 kilometers to the east of ZheJiang provincial
cash--- HangZhou. Our organization also has handy targeted traffic transportation, as it is fifteen kilometers absent from
Diaozhen City station of HangZhou-HangZhou expressway, and thirty kilometers away from East HangZhou station of
ZheJiang -ZheJiang expressway.The leading solution of our organization is ESR -variety Roots Blower. The roots
vacuum pump is a new sort of large-efficiency roots blower, which is designed independently based on the
domestic and overseas advanced systems. A number of patented technologies have been adopted on Roots
Blower, and therefore we have manufactured important results in vitality conservation and noise reduction, and many others.. So much, our
company has invested a lot more than thirty,000,000 RMB to introduce such superior specialist equipment as
horizontal machining center, vertical machining center, two-way CNC surface planer, CNC lathe, CNC milling
device, CNC planer, aircraft grinder, cylindrical grinding device, and 3 coordinates screening device.
Apart from, we have taken various steps to CZPTize the procedure stream these kinds of as doing work and cooperating
with several scientific research units, colleges and universities at property and abroad. We also continually try to
take in and improve the domestic superior creation systems, so as to advertise the upgrading and
optimization of the item and make the item quality reach the innovative stage at residence and overseas.
ESR -type Roots Blower involves a number of series such as Three-leaves Kind, Two-leaves Variety and Centrifugal
Kind,which can be even more divided to hundreds of kinds. The merchandise are commonly utilized in sewage treatment,
pneumatic conveying,vacuum packaging, aquaculture, food processing, electrical power, petrochemical, cement,
mining and other industries. Our items have this sort of advantages as reduced noise, power conserving, steady top quality,
and long provider lifestyle, and so on.. With the sales outlets throughout the domestic capital towns, our goods promote properly all
above the place, and have been exported to North The united states,Russia, Malaysia, Indonesia, Vietnam, South Africa
and some other nations. Getting obtained the ISO9001 CZPT CZPT Program Certification, we have
set up and enhanced the good quality assurance of the merchandise creating, producing, and installation.
From the procedure of design, study and development to the concluded items, we have got the total
method controlled independently, as a result offering the full foundation and dependability ensure for the merchandise security
and longevity. Obtaining a perfect income community and after-income provider, we provide our clients with increased-
quality and more effective support.All staff of our firm sincerely welcome the wide masses of pals to
guidebook, and negotiate enterprise with us.

Our Roots Blower Workshop

         Doosn Horzitonal CZPT Center

The Application of the Roots Blower

Servicing and inspection
(one) Check all fasteners and finding pins problems whether they are loosening.
(two) Always examine no matter whether the leakage phenomenon of the human body.
(3) Spend focus to lubrication, quantity of grease and noises when operating,
determine whether it operates beneath the required situations.
(4) CZPT & grease: The lubricant is for medium load industrial gear oil
(grade 220, kinematic viscosity of 198 ~ 242mm2 / s 40ºC, flash point ≥ 200ºC)
The grease is butter (artificial lithium grease penetration 220-250, drop level ≥
190ºC). Replace the lubricant and grease soon after first 200 several hours managing, and replace
once more following a moth operating. Afterwards, change the lubricant and grease in accordance to the
atmosphere and lubricant (grease) quality propose a appropriate substitute for a few
(5) Often check the inlet air filter, clean or exchange the filter in time.
(six) Blower overload often not right away shown, so pay out consideration to
the consumption and exhaust pressure, bearing temperature and the existing increase trends
of motor to decide regardless of whether the blower performs typically
(7) Just before disassembling the blower, the assembling relation and dimensions
have to be recorded or measured, make marks on components to make sure the CZPT
needs soon after assembling.
(8) When newly device or overhaul, the oil tank should be cleaned just before use
and propose replace all grease after eight hrs operating.

Typical failure reason and troubleshooting

No Failure Possible reasons Elimination methods
1 Friction
amongst the
(one) Impurities on the impeller,
ensuing in the gap is too small
(2) Gear wear, ensuing in a
large backlash
(three) The gear is not well fastened,
can not preserve the impeller
(4) Bearing dress in resulting in
clearance increasing.
(one) Remove grime and check out
no matter whether there is damage areas
(2) Alter the equipment gap, substitute
the gears if the gear backlash is
better than the regular 30% to
(3)Re-assemble the gears, keep
the taper get in touch with location is to 75%
(4)Substitute the bearing
2 Collision
impeller and
wall, the
impeller leading
and casing
(one) Set up gap is not correct
(two) running force is too
substantial, exceeding the specified
(three) Operating temperature is also higher
(four) Casing or foundation deformation,
positioning enthusiast failure
(five) Bearing axial area is not excellent
(1) Alter the hole
(2) Discover leads to of
overloading, decreased the strain
to the specified value
(3) Check out the set up
precision and decrease the pipe
(four) Examine and fix bearings,
and to make certain the clearance
3 Temperature
also higher
(1) Oil in tank is too much, way too
thick or too dirty
(2) CZPT or silencer is blocked
(3)The stress is larger than
the specified worth
(4)Excessive put on of the
impeller, huge gap
(five)Bad ventilation, indoor
temperature is high, resulting in
inlet air's high temperature
(six) The rotating pace is too lower,end result in the belt slipping.
(one)Reduce the oil degree or count on
(2)Remove of blocking objects
(three)Lowering the pressure via
the blower
(4)Mend its clearance
(five)Open up vents to reduce place
(6) Improve speed to avert the
belt slipping.
4 Inadequate
(1) The inlet filter is blocked
(two) Impeller use and the gap
raises way too significantly
(three) Belt slipping
(four) Massive imports force decline
(five) CZPT air flow leakage
(one) Cleanse the filter dust and
(two) Restore the gap
(3)Tighten the belt and increase
the variety of belts
(four)Alter the inlet pressure to the
specified price
(5) Examine and mend the pipeline
five Oil leaking or
oil leaking
into the enclosure
(one)Higher tank position result in
leakage from the discharge port
(2) Seal dress in, resulting in shaft oil spills
(three) The stress is larger than
the specified price

(one)Lessen the oil degree
(2)Replace the seals
(3)Distinct the air vents, 2mm diameter faucet is mounted in the
center chamber, open up the faucet
underneath the wall
6 Irregular
vibration and
(1)Bearing clearance exceeds the
specified worth or bearing put on
(2) The gear backlash is too
massive, not in a restricted fixed
(three) The overseas objects and dust
induced by the impeller and the
impeller, the impeller and the
housing collision
(four) the impeller shaft
deformation caused the collision
brought on by overload,
(5) Friction in between the impeller
and the inlet housing induced by
(6) Unbalance of the impeller
caused by fouling or overseas
human body
(7) CZPT bolts or other
fasteners are loosened
(1)Change bearings or bearing
(2)Reassemble gear and make sure
(three)Cleaning blower, verify the
case is ruined
(four)Check out the back strain, check out
the wheel and change gap
(five)Check out the filter and again
force, boost the gap
between the impeller inlet and the
(6)Clean the impeller and the
casing, to guarantee that the impeller
clearance work
(7) Tighten the anchor bolts and
leveling the foundation.
seven Motor
(one)In comparison with the needed
stress, the strain distinction
is massive that the back stress or
the inlet force is large
(two) In contrast with the
tools requirements, blower
circulation is as well huge, so its strain
(three)Inlet filter is blocked, or outlet
pipe is obstructed or blocked
(4) Collusion or friction (stuck)
rotating elements
(5) The oil stage is too large
(6) Narrow V-belt is overheat,
vibration is as well massive, or pulley
is too little
(one) Lessen the stress to the
specified price
(2) Exhaust the excess fuel into
the atmosphere or reduce the
blower speed
(3) Eliminate the obstructions
(four)Right away shut down, verify
the explanation
(5) Alter the oil to the right
(six) Check out the belt pressure, and
changed it with large diameter

Our Provider

1. Pre market service                                                                              2. Following promote service                                          
a. recommend the suited model                                             c. on the internet specialized assistance,                                                                                   
b. factory tour                                                                              d. whole life spare components and techinical assist


12 months gurantee for our roots blowers

Elt-300A High Efficiency Low Engergy Roots Vacuum Pump