Laboratory Products

Dewatering: Pressure Filters & Vacuum Filters

We manufacture a wide range of laboratory pressure filters (also incorrectly referred to as a filter press) for sample dewatering in bench mount or floor standing configurations, in both mild steel and stainless steel options and with options of wash water introduction systems.

 

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

 

AS 1210 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 Vol. (L) Compressed Cake Vol. (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. Bench Mounted AS 1210 Compliant “Economy” Pressure Filter

We have designed a stainless steel 13L bench mounted pressure filter that is AS 1210 compliant. By “Economy” we mean its manually operated and so is cheaper for us to manufacture, however we still need to cover the costs of indpendent design verification, independent weld inspections and pressure tests so they are higher priced than the non-AS 1210 pressure filters further down this page.    

We have designed a stainless steel 13L bench mounted pressure filter that is AS 1210 compliant. By “Economy” we mean its manually operated and so is cheaper for us to manufacture, however we still need to cover the costs of indpendent design verification, independent weld inspections and pressure tests so they are higher priced than the non-AS 1210 pressure filters further down this page.    

 

Sample Volume (L) Operating Press. (Bar) Barrel OD (mm) Barrel  Frame  MARC Stock Code
13 8 273 316SS 316SS 189085

 

3. Large Volume AS 1210 Pressure Filter

We also have a 39L floor standing pressure filter design that is compliant with AS 1210 (based on our 41L non-AS 1210 pressure filter) that is available on request. 

 

 

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

 

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

The floor mounted pressure filters are available up to 41L sample size and sizes up to 24L are available with Mild Steel or 316SS frames. The cylinders in all our filters 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

 

 

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

The bench mounted pressure filters are available in full 316SS onlyOur bench mounted pressure filters are of heavy duty construction and so a sturdy bench is required. These filters are not AS 1210 compliant but FEA structural analysis has been perfromed on both sizes and so these products are engineered to be safe for the typical air pressures experienced in a laboratory environment. Our 13L unit is designed with ease of use in mind.   

 

Capacity(L) Barrel OD (mm) Barrel Material Frame Material MARC Stock Code
4 ~169 316SS 316SS 189674
13 ~273  316SS 316SS 189678

 

 

6. 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, Büchner funnels and Büchner 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. 

 

 

 

 

 

 

 

 

7. 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