Laboratory Products

Dewatering: Pressure Filters & Vacuum Filters

 

MARC Technologies Manufactures and Supplies a wide range of pressure filters in bench mount or floor standing configurations.

 

Please Read: *In September 2015 the Government of Western Australia’s Department of Mining and Petroleum (DMP) issued a reminder that Laboratory Pressure Filters are to be designed and treated as Pressure Vessels (Click Here to Read).*

Although the term “filter press” is commonly used for this equipment this is actually incorrect – the correct term is “Pressure Filter” and it should not be forgotten that these are pressurized vessels and that they need to comply with the Australian pressure vessel standard which is AS 1210. The average pressure filter cannot be cost effectively modified to comply with AS 1210 as there are a few key structural changes required and the pressure filters commonly used in mineral sample processing applications have not in any way been designed to comply with AS 1210. 

In summary, the requirement for pressure filters on mine-sites in Western Australia to have AS 1210 compliance has simply emphasized the commonly known need for any equipment to be proven as fit-for-purpose for its task. Without AS 1210 compliance it may be that your pressure filter is actually not able to remain intact when pressurized due to either a lack of verified structural strength and/or unsuitable weld quality.  

 

1.Quick & Easy Handling – High Performance Certified AS 1210 Compliant Pressure Filter

 

High Performance AS 1210 18, 13L & 6L Pressure Filters

 

Main Features:

  • 6, 13 & 18L Sample Volume Options
  • Rapid Dewatering Design
  • AS 1210 Compliant
  • Corrosion Resistant 316 Stainless Steel Construction  
  • Filter cloth clamping time: ~3 seconds (depending on operator experience)
  • Time to close and pressurise: ~2 seconds 
  • Removable filter cake support is supplied as standard 
  • Filter media clamping force is easily adjustable in seconds.

 

Please also note MARC’s High Performance pressure filters are designed to be operated at 500 kPa and is designed for a maximum sample hazard classification of “Harmful liquid and/or Gas”. This covers gold/sodium cyanide applications.  

 

Sample Volume (L) Compressed Cake Volume (L) Barrel OD (mm) Barrel  Frame  MARC Stock Code
6 1.7 169 316SS 316SS 111916
13 2.9 225 316SS 316SS 119111
18  7.1  324 316SS   316SS 112021 

 

2. Large Volume AS 1210 Pressure Filter

A 39L floor standing pressure filter compliant with AS 1210 (based on our 41L non-AS 1210 pressure filter) will be available soon. 

 

39L Floor Mount AS 1210 Compliant Pressure Filter

 

**Please note the pressure filters below this line do not comply with AS 1210 and may not be used on West Australian Mine Sites**

 

3. Floor Mounted Pressure Filters (Not AS 1210 Compliant)

 

24L Floor Mount Pressure Filter with Mild Steel Frame

 

 

5L Floor Mount Pressure Filter

(Corrosion Resistant 316 Stainless Steel Frame)

 

 

 41L Floor Mount Pressure Filter

(Corrosion Resistant 316 Stainless Steel Frame)

 

The floor mounted pressure filters are available up to 24L sample size and are available with Mild Steel or 316SS frames. The cylinders are available in 316SS only.

The 41L pressure filter size is only available in 316 stainless steel. 

*Note: Stainless Steel frames do have a higher cost but they dramatically extend the life of the filter – especially considering their wet environment and their typical use in processing corrosive samples, including sulfide ores. Also considering pressure filters are pressurized vessels having a stainless steel corrosion resistant structure would be safer in the longer term.

We also supply filter cloths and kraft filter paper as consumables for our filters.

 

Capacity (L) Cylinder OD (mm) Cylinder Material Frame Material MARC Stock Code
5 169 316SS Epoxy Coated Mild Steel 189470
316SS 316SS 114536
13 225 316SS Epoxy Coated Mild Steel 125183
316SS 316SS 189610
24 273 316SS Epoxy Coated Mild Steel 189625
316SS 316SS 189651
41 324 316SS 316SS 189652
Add Electrolytic Galvanizing Treatment to Mild Steel Floor Mount Frames 112151

 

 

4. Bench Mounted Pressure Filters (Not AS 1210 Compliant) 

 

The bench mounted pressure filters are available with Mild Steel or 316SS frames. The cylinders are available in 316SS only.

It is best to keep the bench mounted filters to a smaller size as the cylinders are manually lifted. 

 

 

 

 

Capacity(L) Barrel OD (mm) Barrel Material Frame Material MARC Stock Code
4 169 316SS Epoxy Coated Mild Steel 189469
316SS 316SS 189674
13 225 316SS Epoxy Coated Mild Steel 189212
316SS 316SS 189678

 

 

5. Bench Mounted Vacuum Filter 

 

The bench mounted vacuum filter is available for filtering up to 11L of slurry. Cylinders are available in 316SS only.

Vacuum and filtrate reservoir options are available. Vacuum can be generated via a typical electrical vacuum pump or generated pneumatically via a simple compressed air supply. 

 

 

Description Sample Volume Material Stock Code
Vacuum Filter 11L 316SS 189473

 

Please note: The water traps/drop out boxes/receivers for vacuum filtration systems are still deemed pressurised components/vessels (albeit negative) and so – as with pressure filters – also need to be AS 1210 compliant on most Australian mine sites. 

 

For options on vacuum manifolds, B├╝chner funnels and B├╝chner flasks please see our page on vacuum filtration systems

 

  

 

 

Larger vacuum systems are recommended for the vacuum filtration of slurries. MARC can offer products to suit. 

 

 

 

 

 

 

 

 

6. Pressure & Vacuum Filter Consumables 

 

We typically carry stock of the following consumables:

 

Description Stock Code
Filter Cloth – 20 x 20cm 189917
Filter Cloth – 25 x 25cm 103971
Filter Cloth – 30 x 30cm 112811
Filter Cloth Per Meter (205cm Wide) 111751
Filter Paper 30 x 30cm Squares (Pack of 1000) 111621