The pulsation damper is one of the indispensable accessories for the use of metering pumps. The following is an analysis and solution of the failures that may be encountered during the use of the back pressure valve.
| Failure | Reason | Solution |
| The pressure gauge points to the mark 0 | a. The pressure gauge is damaged b. The damper does not have pre-charged gas | a. Replace the appropriate pressure gauge b. Pre-charge gas with 50%-70% of pipeline pressure |
| Air leaks from the pipe connection port during inflation, and the pressure gauge pointer points to the scale after inflation. | Diaphragm damaged | Replace diaphragm |
| When using ammonia as medium, the dial of the pressure gauge turns black and the single pointer fluctuates normally. | The volatile gas of ammonia causes corrosion of the copper joint of the pressure gauge and enters the pressure gauge. | Replace the stainless steel pressure gauge and re-inflate. If air leakage is found from the interface during inflation, the diaphragm must be replaced at the same time. |
| Liquid leaks from the upper and lower shells | a. The upper and lower shells are loose b.Diaphragm damaged | a. Tighten the fixing screws b. Replace diaphragm |
| The pressure gauge swings and fluctuates greatly | a.Inappropriate inflation pressure b. Damper selection volume is too small c.Diaphragm damaged | a. Pre-charge gas with 60% of the pipeline pressure. b. Replace the damper with a larger volume c. Replace diaphragm |
| The pointer of the pressure gauge points to a certain pressure without any fluctuation. | a. Pre-inflation pressure is too high b. The pressure gauge is damaged or blocked | a. Place the cavity pressure at 60% of the pipeline pressure b. Check the pressure gauge or replace the pressure gauge |
| Even after the inflation tool is screwed onto the inflation connector, the pressure still cannot be inflated. | The depth of the inflation valve core is too deep, and the valve core cannot be pressed through after the inflation joint is screwed on. | A simple ring-shaped object (such as a paper ball) can be used to cushion the inflation valve core, and then inflated |
| The gas pressure in the damper leaks too quickly | The valve body seal is not tightly sealed | Tighten the screws or tighten seals such as pressure gauges and inflatable joints |
