Order Guide of the Right High Temperature Flow Meter
- Whether the measured medium is corrosive to the material
- Working temperature, working pressure, working flow, medium viscosity
- Pipeline inner diameter and connection method
- Is there a pump to transport the medium on site
- Display and signal function requirements
- Whether signal remote transmission and working power supply are required
- Whether explosion-proof is required
- Accuracy level
Troubleshooting of Oval Gear Flow Meter
Fault phenomenon | Causes | Measures | Notes |
Oval gear does not rotate |
1.There are sundries in the pipeline 2.The liquid tested contains more debris;the filter is damaged;the sundries enter the meter and the gear is blocked. |
Remove the instrument and pipeline and repair the filter |
|
Leakage of axial sealing coupling |
Sealing filler wears or lacks seal oil | Tighten gland or replace packing,fillsealing oil | |
Unstable pointer rotation |
Pointer and washer are loose or rotating parts are dumb | Retighten to eliminate inflexibility | |
Small flow error is too negative |
Elliptical gear collides with the wall of the measuring box due to wear of the bearing or deformation of the measuring cavity | Replace the bearings,repair the metering cavity and gear at the deformed place, make the rotation flexibleand ensure the required clearance | Calibrate after repair |
Error changes alot | Large or gaseous flowpulsation | Reduce pulsation and add gas separator |
|
Error is too large but not more than ±1%. |
Changes in service life or clearance after maintenance | Re-calibrate and adjust it | For level 0.2 flowmeter,the maximum and minimum change does not exceed ±0.17% |
No signal when transmitting |
1.The position of transmitting block is improper 2.The polarity is reverse |
Re-adjust position,move left and right Re-wire it (+is connected to red wire,-is connected to black wire) |