Pre-Filters for Gas Sample Probes Series SP®
●Description
■The large active surface of the M&C pre-filters ensures a long service life, since even with a higher sample gas flow rate, there is only a very low differential pressure at the filter matrix between the clean gas and the raw gas side and this prevents solid particles from penetrating into the depth of the filter pore structure. They are deposited as “filter cake” on the filter surface and act as a pre-filtration layer to extend the service life.
■The M&C-pre-filters SP2000 /V20, /V12 and /20SS are selected according to the spe- cific application. The basis for selection are the process parameters, i.e. the gas compounds, dust load, particle size distribution, water vapor saturation, temperature, pressure and flow rate.
■The M&C pre-filters /V20 are equipped with a welded thread connector for installation into the mounting flange of the M&C gas sample probe. For an opti- mum sampling position in the process, the pre-filters /V20 can be mounted to the sample probe via an extension tube /Vm.
■In case of a high flow rate of the process gas, shape protection plates /AB are used in order to protect the pre-filters /V20 against abrasion.
■The pre-filters /V12 are equipped with a mounting flange adapter made of stain- less steel with 4 welded-in threaded bolts for easy installation. The pre-filter versions /V12, /SS, /V12, /IC are equipped with a welded protection tube out of stainless steel or Incoloy on the mounting flange adapter.
■The feeding of process gas is carried out via the three longitudinal slots distributed over the 180° circumference of the tube. The spe- cial two-layer design of the pre-filters /V12-1 and /V12-3 ensures a particularly high back- purging effect.
■Depending on manufacturing, the pre-filters /V20 and /V12 are partially made of different material combinations, see table. To reduce the lag time in case of a low sample gas flow, pre-filters with volume displacer have to be used.
■The M&C tube pre-filters /V20-T made of PTFE with interwoven metal threads to reduce the surface resistance (to avoid electrical charg- ing) has excellent back-purging properties. It is used, for example, to extract gas from coal bunkers with a high content of fine dust.
■The pre-filter /20SS 150 is used for direct mounting on the M&C sample tubes SP2000/ SS. It is supplied with a shape protection plate and a tube fitting with a double cutting ring.
■If there are problems e.g. in case the installa- tion depth for a pre-filter is too small or the flow rate is too high, or the dust level or the temperature are too high, then the electrically heated adapter tube /AR should be used. It is equipped with a flange connection on both sides and is to be mounted on the plant’s sampling nozzle.
●Special Features
■For dust load > 2 g/m3
■Sampling temperature up to max. 1000 °C [3272 °F]
■Various dimensions
■Great variety of materials
■Large filter surface
■Back-purging possible
■Easy mounting
- +1 Like
- Add to Favorites
Recommend
All reproduced articles on this site are for the purpose of conveying more information and clearly indicate the source. If media or individuals who do not want to be reproduced can contact us, which will be deleted.
Integrated Circuits
Discrete Components
Connectors & Structural Components
Assembly UnitModules & Accessories
Power Supplies & Power Modules
Electronic Materials
Instrumentation & Test Kit
Electrical Tools & Materials
Mechatronics
Processing & Customization
