Sintered Filters and Silencers

Sintered bronze filters and silencers

Powder metallurgy technology makes it possible to obtain highly porous metal materials intended, among others, for purification, flow calming, deoiling of liquids and gases, and for the production of catalytic agents, electrodes, returnable safety devices, and drains. High accuracy of purification, good mechanical and plastic properties, heat – resistance, resistance to the corrosive effect of the filtered agent, easy regeneration, and good machinability are basic advantages of Sintered filters and silencers. The products are used, among others, in aircraft, automotive, chemical, and machines – tool industries.

Advantages

  • High filtering efficiency, also under high pressure
  • Corrosion resistant
  • High temperature resistance
  • Easy to clean
  • Easy to implement

Dimensions

Best fit for CERAMET filters and silencers

  • Filtering – allows for filtering at high pressure and high temperatures with high
    corrosion resistance
  • Separation – allows for separation of fluids or gas due to differential surface tension once with contact with metallic filter elements
  • Diffusion – Fluid or gass homogenous distribution due to uniform porosity
  • Capillary effect and fluidisation
  • Silencing
  • Sensor and valve protection
Mark of
material		 Maximum
pore size [µm]		 Absolute
purification
accuracy [µm]		 Nominal purification
accuracy based on stopping
95% of particles [µm]		 Diameter of
raw material
particles [mm]
OOBLP – 010 10 4.5 4 0.04 – 0.06
OOBLP – 020 20 9 8 0.06 – 0.088
OOBLP – 040 40 18 15 0.088 – 0.12
OOBLP – 050 50 23 19 0.12 – 0.15
OOBLP – 070 70 32 27 0.15 – 0.20
OOBLP – 100 100 45 38 0.20 – 0.25
OOBLP – 120 120 54 46 0.25 – 0.30
OOBLP – 150 150 68 57 0.30 – 0.385
OOBLP – 200 200 90 76 0.385 – 0.43
OOBLP – 250 250 113 85 0.43 – 0.7
The values of absolute purification accuracy were calculated by multiplying the maximum pore size by a coefficient of 0.45
The values of nominal purification accuracy (based on capturing 95% of particles) were calculated by multiplying the maximum pore size by a coefficient of 0.38
Mark of material Min. open porosity [%] Max. density [g/cm3] Tensile strength [MPa] Elongation [%] Electrical conductivity [S/m]
OOBLP – 010 20 6.9 90 9 2.6 x 106
OOBLP – 020 20 6.9 90 9 2.6 x 106
OOBLP – 040 20 6.9 60 8 1.9 x 106
OOBLP – 050 20 6.9 60 8 1.9 x 106
OOBLP – 070 22 6.8 50 6 1.5 x 106
OOBLP – 100 25 6.6 50 6 1.5 x 106
OOBLP – 120 25 6.5 35 4 1.3 x 106
OOBLP – 150 26 6.4 30 4 1.3 x 106
OOBLP – 200 26 6.4 30 4 1.1 x 106
OOBLP – 250 27 6.2 20 2 1.1 x 106

Chemical Composition

Material grade
CuSn10		 Composition [%]
Cu
rest		 Sn
9 – 11		 Impurities max.
0.15
Sintered filters and silencers of different technical parameters and chemical composition may be produced on customer´s request.
Shapes and dimensions of sintered bronze filters depend on their application and are adapted to individual requests of customers.
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