How to work Filter Press

Manual Filter Press Operating Procedures

1. Close plates: Put the handle into the jack and adjust the direction valve. Then rotate the handle clockwise until can not move.
2. If slipping happens, please change the direction using the direction valve.
3. Normally one person’s strength is ok as closing pressure. If leakage happens while filtering, please increase the closing pressure.
4. Open plates: Adjust the direction valve and rotate the handle anticlockwise.
5. After filtration, pull back the closing plate and discharge cakes by pulling every plate.

Automatic Filter Press Operating Procedures

1. Close plates: Please check the upper limit pointer of the pressure meter is at 18 MPa and the lower limit pointer is at 16 MPa. Then press the “Forward” button and the motor will squeeze the plates automatically.
2. Keeping pressure: When the hydraulic motor stops, please open the feeding valve and ensure the pressure is under rated pressure. The pressure will maintain automatically. If the closing pressure reaches the lower limit of the meter, the hydraulic station can complement pressure by itself.
3. When filtration is finished, please press the “Back” button, and the closing plate will be pulled back automatically.
4. Then press the “Discharge” button, and the plate shifter will pull back plates automatically to realize discharge.

Hydraulic Plate & Frame Filter Press Operating Procedures

(Hydraulic Plate & Frame Filter Press has been used for many years in the dewatering industries, and is widely used in sludge dewatering. The plates and frames of this type of press are arranged alternately in parallel, and the filter cloth is clamped between each filter plate and filter frame. When this filter press is used for sludge treatment, the plates and the frames are compacted using a hydraulic cylinder, and when compacted, the press will form a filter chamber between the filter plate and the filter frame. Sludge will be pumped in through the inlet flange, and filtrate will discharge thought the filtrate holes in the filter plates, the filter cake will build up in the filter frame and filter through the cloth on the filter plate, the filter cake is easy to discharge after loosening the impacted plate and frame. The Hydraulic Plate and Frame Filter Press has the advantages of simple operation, and a high solids capability)

Hydraulic Filter Press Operating Procedures

1. Close plates: Press the “Forward” button and the motor will squeeze the plates automatically. After closed the pressure should be maintained at around 16-18 MPa by a pressure meter with electric contact.
2. After closing plates, the slurry can be fed in and the feeding pressure should not be overrated value. Otherwise, the leakage might happen.
3. If the pressure cannot reach the set highest pressure, please adjust the high-pressure relief valve (Just a little.), then lock it.
4. If change the relief valve, please adjust the relief valve from low pressure to high pressure slowly and finally reach the rated value.
5. Relief valves have been set before delivery, please do not adjust them without authorization.
6. While feeding the slurry at first, please open the return valve in advance to ensure the slurry can be fed into filter chambers slowly. After 15 minutes, please turn off the return valve.
7. If the feeding pressure is over the rated pressure, please open the return valve.
8. Open plates: Press the “Back” button and the motor will loose the plates automatically. Then discharge cakes.

(Hydraulic Filter Press is made up of two recessed chamber plates. Slurry is pumped into the press by the feed pump, the suspension is pumped into each filter chamber and the solids are collected in the chamber on the filter cloth, while the filtrate passes through filter cloth and flows along the filter plate recesses to the discharge channel. When the filtration is complete, washing water can be introduced to wash the filter cake. After washing, compressed air can be introduced to blow the remaining wash liquid out through the filter cloth. Cake discharge can now take place by opening the filter plates, and the cake will discharge generally by gravity. The cakes are stored in filter chamber between the two filter plates)

Membrane Filter Press Operating Procedures

1. Procedures of plate closing and back are the same as others.
2. When filtration is finished, please open the air feeding valve. The compressed air will inflate the membrane plate to squeeze cakes additionally so that the liquid content is lowest.
3. After air squeezing, please close the air feeding valve in order to discharge the air into the membrane plates. Then discharge cakes.

(Hydraulic Membrane Filter Press is very similar to the Chamber Filter Press but adopts an inflatable Membrane on one side of the filter plates, which when inflated to high pressure squeezes the filtered cake reducing the moisture content of the cake even more. The squeezing medium can be air squeeze (compressed air /N2), or liquid squeezing (water or other medium), it depends on the process. We can customize this for food grade Filter Presses. The controls for the system are usually Human-Machine Interface HMI and PLC controlled)

Open filtrate and Close filtrate.

Close filtrate: filtered liquid is discharged via the pipe, which is consisted of the outlet of all plates. It is mainly used for special slurries, such as toxic, volatile, etc.,

Open filtrate: filtered liquid is discharged via the outlet on every plate. The open filtrate is widely used because if the filter cloth is damaged, it can directly find the problem soon. (If the filter cloth is broken, the liquid will be not clean. Please turn off the tap and repair the cloth after discharge.