Installation and operation notes of rotary valve

Rotary valve is also known as discharge valve, it is mainly is used in power plants, cement plants, chemical plants etc. and dust removal industry, packing machine and professional mixing & conveying systems. Rotary valve is used for quantitative feeding and air lock when conveying dry powder material. It can also used for the lower hopper of dust collector and air preheater. It is an ideal accessory in conveying, discharging and dosing system  due to simple structure, stable performance and easy maintenance.

  

Installation notes

 1. The rotary valve must be kept clean, especially the inner body of main casing .

2.Check all fasteners to ensure the connection is reliable, the machine (including motor) is well earth grounded.

3. The upper and lower flange under of rotary valve must be fixed firmly, to make the whole machine placed inhorizontality at the same time

4.Check the wiring of motor to ensure it is able to start.

 Operation notes

 1.Pay attention that if motor is over heat when start up the power supply ,you must stop and inspect it, so as not to affect normal operation of the gearmotor.

2.Gearmotor must be operated as per the operating manual and the gearmotor rotating direction must rotate as per the arrow direction as shown.

3.If powder leakage phenomenon is found on the shaft, please tighten the packing gland bolts at both ends.

4.During operation , check  heating circumstance of bearing, general bearing temperature rising shall not be over 60 ℃.

5.During operation, if you find abnormal vibration, please stop the machine and exclude the abnormal phenomenon.

6.If there is bolt looseness in the process of operation, please tighten the bolt.

                                                               

Debugging of Screw Conveyor

All the hanging bearings of screw conveyor should be hanging on the connecting shaft reliably without stuck and bending of screw. When installation, adjusting the gaskets number of hanging bearing to make no gap in subdivision surface while a proper radial gap between bearings and connecting shaft.

 

Hanging bearing should be installed in the center of connecting shaft, the distance between end face and two screw pipes should be over 10mm when D≦400mm and over 20mm when D≧500mm.

 

To adjust the accumulative error between chassis and screw, there should be padding asbestos lining between the flange of the chassis when installation. Padding waterproof canvas between chassis and cover according to the requirements for sealing.

 

When the difference of center heights of driving gear reducer shaft at low speed and screw conveyor is too much, using the gaskets to adjust the height of driving unit.

 

When no-loading running, if there is oil leakage phenomenon, removing the bearing and adjusting the tightness of spring in sealing ring until no leakage.

 

When no-loading running, overheating of hanging bearing indicates the installation position of hanging bearing is improper which leads the locking of connecting shaft, there should be loosing the fasten bolt and adjusting the position of hanging bearing.