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Nuoguan NORGREN throttle valve installation and maintenance precautions
Nuoguan NORGREN throttle valve installation and maintenance precautions:
If the Nobel throttle valve often requires operation, it should be installed in an easy-to-operate position. When installing, pay attention to the direction of the media and the direction of the arrow marked on the valve body.
Causes of throttle blockage:
1. The mechanical impurities in the oil or the colloid, asphalt, carbon residue and the like deposited by the oxidation are accumulated in the throttle gap.
2. Due to aging of the oil or the generation of charged polarized molecules after being squeezed, and there is a potential difference on the metal surface of the throttling gap, the polarized molecules are adsorbed to the surface of the gap to form a strong boundary adsorption layer, and the thickness of the adsorption layer It is generally 5 to 8 microns, thus affecting the size of the throttling gap. When the above deposits and adsorbates grow to a certain thickness, they are washed away by the liquid flow and then reattached to the valve port. This cycle, the flow of the flow is formed.
3. When the valve port pressure difference is large, the temperature of the valve port is high, the degree of liquid being squeezed is enhanced, and the metal surface is more susceptible to friction to form a potential difference, so that the pressure difference is likely to cause clogging.
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