How to replace the Mechanical Seal of corrosion resistant pump

Replacement of mechanical seal of corrosion-resistant pump:

1. The common process is as follows: loosen the fastening screw on the torque transmission ring; loosen the flushing receiver and loosen the fastener on the gland; tighten the bolt by moving the gasket to the drawing position; remove the mechanical seal. Mechanical seal device 2. Disassembly process of mechanical seal 1. Turn off the equipment and follow the correct procedure to cool and relieve pressure.

2. There is no media contact seal. Empty the media in the device if necessary. 3. Take measures to avoid ignoring the startup of the device.

Preparation work before installation:

1. Check whether the mechanical seal is intact.
2. Check transmission parts and fittings.
3. Check the fit of transmission pin and positioning pin in hole or groove.
4. Check the condition of the positioning screw.
5. When using small spring mechanical seal, it should be checked whether the length and rigidity of small spring are the same.

The steps and precautions of the mechanical sealing device are as follows:

1 the working length of the mechanical seal of the position setting device is based on the request of the general assembly drawing, and the tightening of the spring depends on the positioning size of the spring seat on the shaft. Before confirming the position of the device, the relative position of the rotating shaft and the sealing cavity shell must be fixed, the mark on the shaft should be made on the basis of the end face of the shell perpendicular to the shaft, and then the positioning dimension position of the spring seat can be calculated.

2 before the device is installed, the shaft (or shaft sleeve) and gland should be burr-free and the bearing is in good condition; seals, shaft, sealing cavity and gland should be cleaned and cleaned. To reduce friction resistance, the area of the mechanical seal on the shaft can be thinly coated with a smooth agent (it must be made sure that it does not react with the apron, usually oil or soapy water) to stop smooth. Floating non-compensation ring without anti-rotation pin structure, should not be oiled, dry into the gland to avoid ring rotation. First install the non-compensation ring and the gland on the shaft, be careful not to touch the shaft to avoid seal ring damage, and then install the compensation ring assembly. The fastening screws of the spring seat or transmission seat should be tightened evenly several times. Before the cover is fixed.

It should be checked whether there is a foreign body adhering to the contact end face of the friction pair, and the compensation ring should be tightened axially by hand. After loosening, the compensation ring can automatically bounce back without stagnation, and then lock the cover screw evenly.