Manutenzione tecnica di una valvola di ritegno
Possible malfunctions and methods of their elimination
| Malfunction | Cause | Elimination |
|---|---|---|
| No flow | The pressure difference on the valve disc is less than the opening pressure | Increase the pressure before the check valve or reduce the pressure after it |
| -//- | During installation, the plug of the passage hole or the disc holder was not removed | Disassemble the check valve and remove the plug/holder |
| The valve does not tightly close the flow | The seat or disc is damaged by foreign bodies | Replace the check valve | -//- | A solid particle got under the disc | 1. Try to wash out the particle with the flow, for this, open/close the shut-off valve near the valve several times. 2. Drain the pipeline, disassemble the valve, and remove the particle. |
| The check valve is knocking | A too large diameter of the valve was selected | 1. Install a smaller diameter valve 2. Install a disc damper (this option is only available for some types of check valves) |
| -//- | - high flow turbulence - the check valve is installed too close to the centrifugal pump - vibration of the pipeline |
Change the installation location of the check valve |
| Breakage of the check valve flange | The valve is subject to loads from connected pipelines | Unload the valve body by installing additional supports or compensators for thermal expansion |
| -//- | The bolts are tightened unilaterally or the corresponding flanges are not co-planar | Perform even tightening of the bolts, eliminate the non-coplanarity of the flanges |
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58
Catalogo di Valvole di Ritorno
287
Zetkama
Zetkama
302
Zetkama
Zetkama
2453
Genebre
Genebre
ARI-CHECKO V 003
ARI Armaturen
ARI Armaturen
9830
Hawle
Hawle
F 05
Brandoni
Brandoni
F 07
Brandoni
Brandoni
S 06
Brandoni
Brandoni
NVD 402
Danfoss
Danfoss
16кч9п
ГОСТ
ГОСТ
RV283
Honeywell - Resideo
Honeywell - Resideo
C102
Ukspar
Ukspar
Ball
Polix
Polix
Silent
Polix
Polix
Swing
Polix
Polix
10730
Oventrop
Oventrop
170
IVR
IVR
2250
FAF
FAF
31A
CMO
CMO
32A
CMO
CMO
35A
CMO
CMO
41
AVK
AVK
53
AVK
AVK
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