Check that the direction of rotation of the motor and the direction of rotation of the pump are the same before the coupling is installed. By adjusting the thickness of the gasket under the mechanical feet, adjusting the center of the shaft, improper alignment will destroy the bearings of the coupling, water pump and motor. 1. Unreasonable installation form of multi-stage centrifugal pump coupling Three structural forms of unreasonable water pump and motor shaft: Form 1: Angle offset Form 2: Pump shaft center line offset Form 3: Multi-stage pump coupling axial distance offset 2, multi-stage centrifugal pump coupling installation Install the pump end coupling and motor end coupling carefully according to the multistage centrifugal pump coupling installation manual. (1) Inspection of soft mechanical feet of multistage centrifugal pumps Before the coupling is calibrated, the pump and the drive must be positioned to check the “soft feetâ€. If there is a gap between the machine foot and the base, loosen the fixed point of the machine foot and check with the feeler gauge. If the gap is greater than 0.05 mm, the gap must be compensated with a shim. If the base has not been grouted, the "soft feet" can also be compensated by re-adjusting the base. (2) Pump foot tightening torque In order to transmit forces and moments, the set bolts must be tightened onto the pump feet. In order to compensate for the looseness that may occur due to the thermal expansion of the pump, the non-drive end does not have to be as tight as the drive end. The tightening torques of the drive and non-drive end cap screws are shown in the table below. Standard thread diameter Tightening torque MA (Nm ) Drive end Non-driver 16 60 40 20 120 80 twenty four 220 140 27 350 220 30 320 320 33 480 450 36 900 600 42 1500 1000 48 2400 1600 56 3900 2600 64 5900 3900 (3) Multistage centrifugal pump coupling alignment alignment program summary Before the multistage pump and motor are coupled together, calibrate the coupling and check the direction of rotation of the motor based on the steering arrows on the pump. Calibration with a meter If a more precise correction is required (at a speed of >3600 rPm or with extended sections), the calibration application dial gauge is performed in the radial and axial directions (see figure), and the large end face jump is 0.05 mm (in the coupling) The diameter of the diameter) is as small as 0.03mm, and the large radial runout of zui is 0.1mm (at the diameter of the coupling), as far as possible to be less than 0.05mm. Higher temperature At higher use temperatures (approximately greater than 130 °C), the Zui final calibration should be performed at high temperatures during pump operation. If the error is greater than the allowable value given above, find out the cause and exclude it. In most cases, high forces and moments are created on the pump nozzle due to expansion of adjacent lines. (4) Multistage centrifugal pump coupling cover Multistage pumps must be operated after the coupling cover is installed. After each calibration alignment check, the coupling cover must immediately re-check the correct installation of the multi-stage pump coupling cover, its robustness, and the distance from the water pump coupling.
1. Imported PET film is used, with high transparency, high acid and alkali resistance, and scratch resistance; Disposable Medical Face Shield,Medical Face Shield With Visor,Medical Face Shield Visor,Medical Face Shield Jilin Sinoscience Technology Co. LTD , https://www.jlgkscience.com
.jpg)
If the pump or driver is not properly mounted on the base, intermittent vibrations and excessive misalignment due to nozzle loading can occur. 
M ( mm )
Flexible couplings require careful adjustment of the shaft line by placing a thin gasket under the feet of the housing (driver, drive). Careless care during assembly will result in damage to the coupling and damage to the pump and motor bearings.
In special cases, the installation and calibration of the multi-stage pump coupling must be carried out in accordance with the instructions provided by the coupling manufacturer. For example, the specified spacing between couplings must be observed.
For multi-stage pump standard extended length flexible couplings, a precision ruler can be used to observe the parallelism with the shaft on any latitude of the outer edge of the coupling, and a thick plug gauge is used in several corresponding The position control controls the distance between the two coupling joints. 
2. Reasonable structure, suitable for workers of various head shapes, can directly cover myopia glasses, convenient for work;
3. This product can effectively avoid the infection of the medical staff caused by the blood and body fluid splashing of the virus carriers in the process of receiving medical treatment and accident treatment;
4. Light weight, ergonomic design, built-in soft pad to reduce the pressure of the cap body on the forehead, comfortable to wear, no pressure;
5. The anti-fog performance is good, the PET protective sheet disperses the fog faster than the ordinary film, and a unique fog dispersing port design is added to give you a clear vision at any time;
6. It is firm and reliable to wear, and you will not feel inconvenience when bending over or bowing your head;
7. The protection area is large, the effect is good, and the protection range can reach the entire face. Because of its economical and cost-effective characteristics, it is very popular among users.
[Features of this product]: This product is a new protective product that integrates eye, mouth, nose and nose protection. It is composed of high-transparency anti-fog film, sponge, resin buckle and rubber band. It is suitable for hospitals, dentistry and other health research institutions, pharmaceuticals , food, cosmetics and other industries, wearing it on the forehead can not only absorb sweat, but also relieve the pressure formed by wearing it for a long time. The unique groove sponge design can increase the air flow and increase the comfort of medical staff when wearing it.