Pump description:
Design ZJ CZPT Booster Pump, also known as a Roots pump, is a volumetric pump.It employs a pair of rotors, identical and in 8-determine with specific clearance in between them in the pump housing, rotating at the identical speed in reverse directions to complete perform of suction and discharge of fuel. The two rotors are supported by rolling bearings in the stop handles of the pump, rotating at higher speed and are kept at a fastened relative situation by a pair of timing gears. The finish clearance in between rotors and conclude handles are set by adjustable metallic shims in between the bearing housings and the conclude cover at the mounted finish, which ensures one-route enlargement of the rotor when temperature rises for the duration of its procedure.
4 sets of internal seals (also acknowledged as piston ring) in the two conclude addresses avoid lube oil coming into into the pump housing. The shaft seal at the front-stop include, also called as framework oil seal or shaft seal, helps prevent leakage of air into the pump housing.
In buy to decrease temperature of the pump, all models of pumps (assume the two smallest designs) are geared up with a gearbox cooler and entrance-stop include cooler.
Power is transmitted by way of a coupling or V-belt from the motor to the driving shaft of the pump and then by means of synchronizing gears to the driven shaft
Requirements:
| Model | Suction potential (L/S) |
Restrict vacuum (≤Pa) |
Speed (rpm) |
Motor Electricity (kw) |
Inlet Dia. (mm) |
Outlet Dia. (mm) |
Excess weight (Kg) |
Suggested backing pump(model) |
| ZJ-70 | 70 | 6×10-2 | 2780 | 1.5 | eighty | 50 | 87 | 2X-eight |
| ZJB-70 | 5×10-two | 100 | ||||||
| ZJ-150A | 150 | 6×10-2 | 2900 | 3 | one hundred | 100 | 198 | 2X-15 |
| ZJB-one hundred fifty | 5×10-two | 215 | ||||||
| ZJ-three hundred | 300 | 6×10-two | 1450 | 4 | one hundred fifty | 150 | 490 | 2X-30A |
| ZJB-three hundred | 5×10-2 | 480 | ||||||
| ZJ-600 | 600 | 6×10-two | 2900 | 5.5 | 150 | 150 | 490 | 2X-70A |
| ZJB-600 | 5×10-two | 503 | ||||||
| ZJ-1200A | 1200 | 6×10-2 | 1450 | 11 | 300 | three hundred | 1550 | 2X-70A (2sets) |
| ZJB-1200 | 5×10-two | 250 | 250 | 1580 |
Programs:
The main advantage of Roots vacuum pump is that it can operate with high pumping speed under reduce suction pressures, nonetheless, has to be backed by a backing pump.Under regular working problems, it is permissible to not add by-pass pipes.Roots vacuum pump should not run with a higher-pressure distinction than allowable,otherwise overheating and overload will cause damage of Roots vacuum pump.
Therefore, appropriate backing pump and needed protection gadgets should be considered.Oil sealed mechanical pump is usually chosen as the fore vacuum pump. Other types of backing pumps may be used where their requirement for supreme vacuum is not too strict. Particularly, when gas pumped that contains large amount of vapor, h2o-ring vacuum pump maybe an ideal option though ultimate vacuum achieved is on the lower side.
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