The Initial Use Of Mechanical Seals Precautions
Mechanical seal is a rotary mechanical seal device
. Such as pumps, centrifuges, reactors and compressors and other equipment. As the shaft through the inside and outside the device, so that the shaft and a circular space between equipment, equipment in the medium leaking out through the gap, the pressure lower than atmospheric pressure if the device, then the air leak within the device, so there must be a device to prevent leakage of the seal. Many different types of seals, mechanical seals have leakage as less and the advantages of long life, so today's world, mechanical seal is the most important axis in the sealing device. Also known as seal mechanical seal, in the national standard is defined as: "by at least one rotation axis perpendicular to the face in the fluid pressure and elastic compensation mechanism (or magnetic) and sealed with the role and supporting the merger to maintain paste consisting of the relative sliding device to prevent fluid leakage. "
Installation notes
a. should be very careful to avoid installation of bias arising from the installation.
b. the amount of compression in accordance with the provisions of the spring, allowed the phenomenon of too large or too small to require error 2.00 mm. Had more than end the General Assembly to increase pressure to speed up the end wear. Too small will cause less than the pressure seal and can not play a role.
c. ring installed, it will ring after compression to the spring should be able to automatically bounce back.
Demolition Note
a. In the installation, demolition equipment to carefully sealed, non-use of hand-hammer and flat shovel to avoid damaging the sealing components. If the scale demolition of no less than should be cleaned before demolition.
b. If the pump mechanical seal both ends of the time, in the assembly, disassembly process of mutual care, prevention of at a loss.
c. mechanical seal on the run-off, where a gland seal loose to shift the case, then the static ring parts must be replaced, not re-tighten the continued use. Because running loose track of the original post Friction change occurs, the sealing contact surfaces easily damaged.
Before the start of preparatory work and notes
a. comprehensive inspection of mechanical seals and ancillary equipment and pipeline installation is complete, compliance with technical requirements.
b. Static pressure seal test before start, check whether the mechanical seal leakage. If the leak more reason should be investigated to eliminate. If still ineffective, should be demolished and re-install checks. Hydrostatic test pressure normally used 2 to 3 kg / square centimeter.
c. Turning by pump rotation to check for light evenly. Such as the car difficult or fixed disk, the assembly should check whether the size of the error, the installation is reasonable.
Installation and decommissioning
a. shall remain sealed before the start of fluid-filled cavity. Solidification of the medium for transmission, the application of steam to the sealed chamber heated to medium melt. Must be set before the start of vehicle to prevent sudden start caused by soft ring fragmentation.
b. For use outside the seal pump mechanical seal oil system, seal oil system should start. After stopping the last stop seal oil system.
c. heat pump can not immediately stop after the shutdown seal chamber and seal oil cooling water, wait until the seal oil temperature dropped to 80 degrees below office only when the cooling water can be stopped, so as not to damage the sealing parts.
by: lucy00123
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