Diesel Engine Exhaust Spark Arrestors

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1 Key Features and Benefits EN 1834 certified for safe use in potentially explosive atmospheres eployed globally in the oil and gas industry Constructed from stainless steel (14404/316) for corrosion resistance and longevity Wide range - available up to 825 kw (1100 hp) Meet engine manufacturers published back pressure specification providing emission conformance, good noise attenuation (SSL and SS) and exceptional spark arresting abilities Compact - SAS up to 4 kw (5 hp) Typical Applications Suitable for situations where spark emission from a diesel engine exhaust could lead to the ignition of flammable material Secondary - SSE 4 kw (5 hp) kw (165 hp) Overview Chalwyn Spark Arrestors provide peace of mind from the risk of fire from the ignition of flammable materials caused by spark emission from the exhausts of diesel engines. They are a basic but key safety feature for both hazardous area and lower risk diesel engine applications such as forestry or agriculture where a stray spark may cause ignition of combustible material. Virtually all legislation with regard to operating a diesel engine in a hazardous area includes a mandatory requirement to fit a properly tested and approved exhaust spark arrestor. Primary - SSL - SS 7.5 kw (10 hp) kw (1110 hp)

2 Operating Principle Chalwyn spark arrestors are the quenching type as defined in BS EN :2000 clause In this cyclonic design the glowing particles emitted from a diesel engine exhaust are spun and repeatedly impacted against internal spark arrestor surfaces. This cools them and breaks them down before eventual safe discharge to atmosphere. Approvals Spark arrestor types SSL and SSE have been type tested and meet the spark arresting performance specified for diesel engine exhaust spark arrestors for use in zone 1 and zone 2 hazardous areas as defined by the ATEX irective. Types SSL and SSE are marked: G IMPORTANT NOTE: In order to fully comply with the requirements of the ATEX irective the installer/user shall satisfy themselves that the installed spark arrestor is suitable for its intended purpose (undertake a spark test if necessary) and shall be included in the temperature assessment of the completed engine prior to commissioning, in accordance with the following stanards appropriate to the particular application. EN : 2000 clause 5.3 EN : 2000 clause 5.2 EN : 2000 clause 5.1 Product Range Type SAS Simple single stage spark arrestors for engines rated below 4 kw (5hp) Not ATEX approved Manufactured in carbon steel (SAS types) Black painted finish Can be mounted vertically or horizontally Slotted inlet pipe for clamping. Fixed size outlet pipe Popular sizes available from stock Type SSE Compact spark arrestors designed for end of line permanent or temporary installation ATEX approved for Zones 1 and 2 hazardous area applications and mining. (See IMPORTANT NOTE under Approvals above) Sizes to suit engine ratings from 4 kw (5hp) to 124 kw (165 hp) Manufactured in 316 grade stainless steel Type SSL and SS Combined spark arrestor / industrial standard silencers designed for permanent installation ATEX approved for Zones 1 and 2 hazardous area applications and mining. (See IMPORTANT NOTE under Approvals above) Sizes to suit engine ratings from 7.5 kw (10hp) to 825 kw (1100 hp) Can be mounted vertically or horizontally Slotted inlet pipe for clamping to exhaust pipe. Plain outlet pipe with O same as inlet pipe I Flanged or threaded inlet pipe options available Many standard size units available from UK stock Single fixing clamp supplied Manufactured in 316 grade stainless steel Can be mounted vertically or horizontally Slotted inlet and outlet pipe for clamping Special custom designed versions to order including flanged or threaded pipe connections Many standard sizes available from stock page 2

3 Selection The limiting engine ratings shown in the table for each spark arrestor type should not be exceeded. Where a diesel engine exhaust system also includes other features with significant flow restriction, eg flame traps, restrictive silencers etc, or the engine manufacturer specifies an unusually low back pressure limit, or where specific noise reduction levels are specified, the installer/user must ensure the spark arrestor meets all requirements of the intended application. If in doubt please check with your local Chalwyn istributor. Note that when selecting a clamp on pipe arrangement, the tabulated data relates to the internal bore of the spark arrestor pipe stubs. Type SAS C 1" B A Bore Gas Flow Old Product Code New Product Code SAS-100 SAS0041A SAS-112 SAS0041B /8 SAS-125 SAS /4 SAS-126 SAS0041E /8 Pipe Bore Engine Power Range A B C Approx weight mm in kw hp mm mm mm kg lb page 3

4 Selection Type SSE A C B Bore E Product Code Pipe Bore Engine Power Range A B C Approx weight mm in kw hp mm mm mm mm kg lb SSE /4 SSE0191E /8 SSE0191F /2 SSE0191H /4 SSE0261F /2 SSE0261H /4 SSE0262A SSE0381H /4 SSE0382A SSE /4 SSE0382F /2 SSE0532A SSE /4 SSE0532F /2 SSE0682A SSE0682F /2 SSE0682H /4 SSE0683A SSE0982F /2 SSE0983A SSE0983F /2 SSE1243F /2 SSE1244A Note: Outlet diameter E matches the inlet diameter shown in the table above. page 4

5 Selection Type SSL A C B Bore Product Code Pipe Bore Engine Power Range A B C Approx weight mm in kw hp mm mm mm mm kg lb SSL /4 SSL0341E /8 SSL0341F /2 SSL0341G /8 SSL0341H / SSL0341J /8 SSL0342A SSL0601H /4 SSL0601J /8 SSL0602A SSL0602C /16 SSL / SSL0602E /8 SSL0602F /2 SSL0602H /4 SSL0652H /2 SSL0652A SSL0652F /2 SSL0902A SSL /4 SSL0902E /8 SSL0902F / SSL0902H /4 SSL0903A SSL09X2A SSL09X /4 SSL09X2E /8 SSL09X2F / SSL09X2H /4 SSL09X3A SSL1503A SSL1503F / SSL1504A SSL2554A SSL2554F /2 SSL2554H / SSL2555A SSL3384A SSL3384E /8 SSL3384F /2 SSL3385A SSL3385H /2 SSL3386A page 5

6 Selection Type SSL continued Product Code Pipe Bore Engine Power Range A B C Approx weight mm in kw hp mm mm mm mm kg lb SSL4135A SSL4135F /2 SSL4136A SSL4136F /2 SSL4137A SSL5636A SSL5636F /2 SSL5637A SSL5637F /2 SSL5638A Type SS Product Code SS6757A SS6757F /2 SS6758A SS8258A SS8258F /2 SS8259A SS8259F /2 SS825AA Installation Pipe Bore Engine Power Range A B (oval) C Approx weight mm ins kw hp mm mm mm mm kg lb x x Fit the spark arrestor into the diesel engine exhaust pipe at any convenient position. Guard as necessary to avoid any hazard arising from contact with the hot surface. if the spark arrestor is not supported and installed correctly. SSL and SS ranges must always be supported at both ends. SSE can be mounted vertically using only the inlet pipe clamp if required. Ensure correct gas flow direction as indicated by the arrow on the spark arrestor. Provide adequate support for the spark arrestor and associated exhaust pipe-work. Support brackets up to 360mm (14 ) diameter are available from Chalwyn. Use flexible sections where required to avoid excessive stresses. IMPORTANT: Early mechanical failure will occur Maintenance aily: Examine the spark arrestor for any sign of gas leakage, cracks or significant areas of damage, ie dents of more than a few millimetres in depth. Three monthly (or 1000 hours operation, whichever is sooner): Remove spark arrestor. Tap with a soft mallet to loosen any internal deposits and shake out. Also by shaking check for any loose internal baffles. Use a proprietary exhaust gas sealant as necessary to make certain all joints in the exhaust system are gas tight. Check that under the full range of operating conditions the spark arrestor surface temperature does not exceed any maximum specified for the application. Six monthly (or 1500 hours operation, whichever is sooner): Examine the exhaust discharge in darkness whilst repeatedly loading and accelerating the engine. If any sparks are observed, the spark arrestor is not suitable for further use. Note: ensure adequate ventilation if this check is carried out in an enclosed area. Note: The engine must not be put back into service until any problems identified by the above checks are rectified. page 6

7 How to Order Example Code S S L A escription Product Product Line S Spark Arrestor Material of Construction Material of S Stainless Steel Construction A Carbon Steel Model Type L Centrifugal Model Type ual Centrifugal E Auxiliary S Recommended Maximum Power Rating Pipe Size Pipe Size Addition or Inch Fraction Small Engine Power Rating (kw) Power Rating (HP) Comment X Shorter length X Shorter length Base Pipe ia (mm) Base Pipe ia (in) A Pipe Size Addition (mm) Pipe Size Fraction (in) A 0 0" B 3 ⅛" C 5 3/16" 6 ¼" E 10 ⅜" F 13 ½" G 16 ⅝" H 19 ¾" J 22 ⅞" Note: For example 60 mm pipe size, select 2E suffix at model code end i.e. 51 mm + 10 mm Accessories Support brackets for most SSE and SSL models are available. Please contact Chalwyn for model numbers. page 7

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