Q:How often do they need to be replaced?

A:There are 3 ways to determine if a cartridge needs to be replaced.

1. The cartridge is damaged, causing dust leakage and needs to be replaced.

2. the differential pressure of the cartridge reaches or exceeds the alarm setting.

The differential pressure alarm is activated.

3. Under some working conditions, the differential pressure of the filter cartridge is always at a low value and cannot reach the differential pressure alarm value.

In some cases, the differential pressure of the filter cartridge is always at a low value, not reaching the differential pressure alarm value, but the dust exists.

Deterioration, fire and other dangerous factors, it is recommended to replace the cartridges if the usage time is more than 3000 hours.

More than 3,000 hours of use, it is necessary to replace, you can also

Consult Shanghai Sanchuan engineer to confirm.

Q:My equipment operates in harsh environments, can the filter cartridges/bags be taken out repeatedly and cleaned or repaired for use?

A: Shanghai VHICH does not recommend this practice.

There are two disadvantages to this practice.

1. Taking out the filter cartridge/bag for cleaning will cause secondary contamination.

2. Repeatedly taking out the filter cartridges may cause deformation or damage to the cartridges, which in turn may cause damage to the equipment.

This will cause damage to the equipment and affect the filtering efficiency.and lead to serious consequences such as failure to meet the emission standards.

Q:My equipment cartridges/bags have been used for a long time and the effect is not good.It needs to be replaced, but due to cost considerations

I am only replacing part of the cartridge/bag to save money.

A: Shanghai VHICH recommends that the entire cartridge/bag be replaced after it reaches the end of its service life.

life of the filter cartridge/bag, a complete replacement is required. Replacing only a portion of the

replacement will overload the new cartridges/bags and shorten the life of the cartridge/bag.

overloading the newly replaced cartridges/bags and shortening their life.

The life of the filter is shortened. We have actual customer cases that have shown that it is not possible to replace the entire cartridge/bag without guaranteeing the same vacuuming effect and duration of use.

We have actual customer cases that show that, while maintaining the same vacuuming effect and operating time

The cumulative cost of replacing part of the cartridge/bag is higher than the cost of replacing the whole cartridge/bag.

cost is higher than replacing the whole unit.

Q:After replacing the cartridges/bags in my equipment, the pressure difference rises within a short period of time, affecting the suction effect.

A:The air volume of the fan is variable with the use of the cartridge/bag.

The air volume of the fan is variable with the use of filter cartridges/bags, and the resistance (pressure loss) of the new filter cartridge is low.

The resistance (pressure loss) of the new cartridge is low, and if the fan air regulator valve is opened too large, the air volume used will exceed the design air volume.

If the fan air regulator valve is opened too wide, the air volume used will exceed the designed air volume. Excessive

The excessive airflow will make the cartridge/bag work in overloaded

The cartridge/bag will be overloaded in a short period of time and the differential pressure will be too high.

The differential pressure will be too high in a short period of time. When the accumulated differential pressure exceeds the static pressure of the fan, the fan will exceed its operating range.

pressure, the fan will go out of working range and the airflow will

and the dust absorption effect decreases dramatically. Therefore, after replacing the cartridges/cloths

After replacing the filter cartridge/bag, it is necessary to close the air regulator valve of the equipment to 1/3.

The air regulating valve of the equipment should be closed to 1/3.

The above is only for the equipment with air regulating valve, small equipment may not have air regulating valve, you may not need to pay attention to the air regulating valve.

The above is only for the equipment with air regulator valve, small equipment may not have air regulator valve, you can not need to pay attention to the air regulator valve, directly use the

can be used directly. If an inverter is used, it is recommended that the inverter be turned off after the replacement of the

If a frequency converter is used, adjust the frequency to the initial value of the equipment after replacing the filter cartridge/bag.

The frequency should be adjusted to the initial value of the unit after the replacement of the filter cartridge/bag.