Sotras Manual
Sotras Manual
Sotras Manual
FILTERS & PRODUCTS FOR COMPRESSORS, VACUUM PUMPS AND COMPRESSED AIR
SOTRAS
MILANO / AOSTA
EXIT BORGARO
SOTRAS
MILANO
TORINO
VILLARETTO
SOTRAS
ROMA
CASELLE VILLARETTO BORGARO AOSTA
SAVONA FREJUS
SOTRAS
MILANO
TORINO
SOTRAS
FILTERS AND PRODUCTS FOR COMPRESSORS
AIR-OIL SEPARATORS FILTER HEADS & ADAPTERS AIR FILTERS SPIN-ON OIL FILTERS
PRATICAL ADVICE
PREMATURE INCREASE IN PRESSURE DIFFERENTIAL EXCESSIVE USE OF OIL COLLAPSED SEPARATOR CAUSES FLASH FIRES
SOTRAS
AIR-OIL SEPARATORS
During the last century compressed air became associated with many industrial applications and compressor manufacturers focused their attention on rotary screw and vane compressor whose compression systems use lubricating oil as a coolant. Hence the necessity of using air/oil separators. Sotras designs and manufactures separators specifically for installation in rotary screw and rotary vane compressors and they are available in vertical, horizontal and spin on configurations. Their purpose is to separate the oil droplets from the compressed air, thereby producing cleaner air and allowing the oil to be scavenged and re-circulated in the compressor. Sotras separators are manufactured to satisfy OEMs needs in terms of: - Physical principle of air/oil separation - Element dimensions according to the compressors performance and tank dimensions. - Oil consumption to ensure a correct functional performance - Use of high grade filtration and separation media to ensure the best quality of clean air needed for industrial applications. Additionally it is very important to highlight that Sotras separators can be used with all types of oils, whether standard, mineral based, synthetic or partially synthetic. In order to decide which is the best separator to be used for a specific compressor, OEMs have to consider what level of separation needs to be achieved, in other words to target the minimum of parts per million of residual oil content required. Then a technical solution is needed in order to reduce the oil concentration in the air. Often OEMs need to consider a pre-separation system, which will reduce the PPM and increase the life of the air/oil separator.
Graph 1
Graph 2
SOTRAS
CONSTRUCTION AND SEPARATION:
Corrosive resistant materials are used in the construction of the air/ oil separators. Careful welding procedures and the use of the latest twin pack adhesive ensure that the element has high mechanical strength and can endure operating temperature up to 120C. Normally, the air and oil mixture passes from the outside to the inside of the separator and the coalescing effect is carried out through a multi stage separation process resulting in the recovery of the oil and producing clean air.
Type single wrapped double wrapped pleated pleated+wrapped with pre-separation fleece spin on
Pressure drop at nominal flow rate (bar) 0,16 0,18 0,15 0,17 0,2 0,25
General specifications low production costs, good performance and long life span excellent performance on small dimensions or long life span low pressure drop low pressure drop and excellent separation levels for applications showing high oil percentage before separation or under particular environmental conditions for easy maintenance and small flow rates
STANDARD SEPARATORS
The table shows some of Sotras standard separators; special types are available on request.
SOTRAS Ref. Nominal flow rate (m3/min) Type Drawing d1 (mm) d2 (mm) d4 (mm) h1 (mm) h2 (mm)
DF 5010 DB 2001 DB 2002 DF 5005 DF 5006 DB 2003 DB 2006 DB 2057 DF 5009 DB 2009 DB 2074 DB 2085 DF 5004 DB 2021 DB 2012 DB 2160 DB 2186 DB 2022 DB 2018 DB 2105 DB 2319 DB 2132 DB 2020 DB 2024 DB 2104 DB 2026 DB 2027 DB 2118 DB 2130 DB 2029 DB 2353 DB 2030 DB 2082 DB 2025 DB 2138 DB 2051 DB 2102 DB 2055 DB 2061 DB 2124 DB 2084 DB 2089 DB 2147 DB 2090 DB 2382 DB 2167 DB 2126 DB 2129
1 1,5 2 2 3 3,5 3,5 3,5 4 4,5 4,5 5 5,5 6,5 7 7 7 8 8,5 9 9 9,5 12 12 12 12,5 14 16 16,5 17 18 19 19,5 20 20 21,5 22 23,5 23,5 25 25,5 28 29 34,5 39 40 43 44
ext int int ext ext int int int ext int int int ext int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int
6 1 1 6 6 1 1 2 6 1 2 2 6 1 1 3 2 1 1 2 4 2 1 1 2 1 1 2 2 1 5 1 1 1 2 1 2 1 1 2 2 2 1 2 5 2 2 1
76 135 135 96 136 135 170 135 108 170 135 170 136 275 170 170 170 275 220 220 220 170 220 275 220 300 300 220 300 300 300 300 400 275 275 300 300 300 400 220 275 300 300 300 393 300 400 475
M22X1,5 88 88 M24X1,5 M39X1,5 88 122 75 M32X1,5 122 75 108 M39X1,5 219 122 108 108 219 165 157 157 108 165 219 157 243 243 157 219 243 219 243 314 219 210 243 219 243 314 157 210 219 243 219 304 219 314 398
62 165 170 62 99 170 200 170 93 200 170 200 99 328 200 200 200 328 273 273 273 200 273 324 273 348 355 288 345 355 343 355 439 324 325 348 350 355 439 273 325 355 355 355 439 355 439 740
123 140 200 210 177 305 230 160 260 305 200 180 303 250 435 230 230 305 430 230 230 305 600 448 305 445 500 400 305 600 314 660 520 750 400 750 400 820 620 612 500 500 1000 600 510 700 600 900
0 12 12 0 0 12 12 0 0 12 0 0 0 0 12 0 0 12 12 0 0 0 12 12 0 12 12 0 0 12 0 12 0 12 0 12 0 12 0 0 0 0 12 0 5 0 0 19
SOTRAS
TYPES AND DRAWINGS int. ext.
(DRAW. 4) PLEATED
(DRAW. 6) SPIN-ON
SOTRAS Ref.
d3 (mm) 14 15 22 30
d4 (mm) 12 13 19 26,5
h1 (mm) 16 16 20 20
h2 (mm) 32 32 41 41
h3 (mm) 18 18 18 18
h4 (mm) 5 5 5 5
S 32 32 50 50
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AIR-FILTERS
Besides being able to provide a wide range of adaptable air cartridges, SOTRAS can offer OEMs a series of air filters that do not require a housing. These filters are recommended for 1 to 12 m3/min flow rates and can be installed vertically or horizontally. This type of solution offers a low pressure drop and very simple installation and replacement procedures. (On specific requests we can offer fibreglass or oiled cellulose filtering media).
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SOTRAS Ref.
d1 (mm)
d4 (mm)
h1 (mm)
h2 (mm)
51 41 76 76 60 100 78
25 25 25 25 25 35 35
1 1 2 4 4 6 12
12
SOTRAS Ref.
d1 (mm)
d2 (mm)
d3
h1 (mm)
Non-return Valve-(bar)
SH 8118 SH 8196 SH 8113 SH 8152 SH 8153 SH 8112 SH 8119 SH 8154 SH 8155 SH 8143 SH 8146 SH 8130 SH 8147 SH 8149 SH 8107 SH 8110 SH 8150 SH 8144 SH 8114 SH 8108 SH 8145 SH 8109
62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 62 98 99 93 98 100
3/4'' 16-UNF 3/4'' 16-UNF 3/4'' 16-UNF 3/4'' 16-UNF 3/4'' 16-UNF 3/4'' 16-UNF 1'' 12-UNF 3/4'' 16-UNF 1'' 12-UNF 3/4'' G 1'' 12-UNF 3/4'' G 1'' 12-UNF 1'' 12-UNF 1'' 12-UNF 1'' 12-UNF M 20x1,5 1'' 1/4 G 1'' 1/2 16-UN 1'' 1/8 -16 UN 1'' 1/4 G 1'' 1/2 16-UN
95 58 125 140 97 143 143 144 172 146 170 193 210 210 210 212 212 182 177 260 228 302
2,5 0,8 2,5 3,5 2,5 2,5 2,5 2,5 2,5 2,5 2,5 1,2 2,5 2,5 2,5 2,5 2,5
14 14 14 35 25 14 14 25 25 14 14 14 14 14 14 25 30 14 20 14 12 20
13
SOTRAS
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DEMISTERS
The media used in our separators enables us to obtain excellent air/oil separation rates up to 1-3 mg/m3. All oil separators are manufactured using materials to withstand high pressures and temperatures and to minimise moisture induced deterioration.
In order to achieve the best possible separation efficiency and long working life of the element it is essential that regular maintenance procedures are followed and joints are applied correctly, as well as the use of good quality air and oil filters.
DRAW. 3
DRAW. 1
DRAW. 2
SOTRAS Ref.
d1 (mm)
d2 (mm)
h1 (mm)
h2 (mm)
Drawing
DA 1050 DA 1051 DA 1022 DA 1060 DA 1120 DA 1013 DA 1014 DA 1111 DA 1015 DA 1047 DA 1020 DA 1048 DA 1030 DA 1049
25,5 32,5 45 35 46 40 40 35 40 35 72 35 72 35
68 74 117,5 132 144 175 200 200 255 250 218 375 284 500
1 1 1 2 3 3 3 2 3 2 3 2 3 2
0,25 0,4 0,7 0,8 0,9 0,9 1,1 1,2 1,4 1,5 2,2 2,2 2,8 2,9
15
16
SOTRAS Ref.
d1
MALEFEMALE
d2 (mm)
h1 (mm)
h2 (mm)
h3 (mm)
h4 (mm)
Element Ref.
SA 6654 SA 6058 SA 6647 SA 6952 SA 6059 SA 6819 SA 6061 SA 6635 SA 6820 SA 6821 SA 6648 SA 6822 SA 6649 SA 6823 SA 6060 SA 6824 SA 6650 SA 6652 SA 6825 SA 6749 SA 6750
G 3/8'' G 3/4'' G 1/2'' G 1'' G 1''1/4 1''1/4 NPT G 1''1/4 G 1''1/4 1''1/4 NPT 1''1/2 NPT G 1''1/2 1''1/2 NPT G 2'' 2'' NPT G 2''1/2 2''1/2 NPT G 3'' G 4'' 4'' NPT G 3'' G 4''
F F F F F F F M F F F F F F F F F F F F F
80 110 110 133 133 133 170 170 170 170 170 170 200 200 200 200 270 270 270 280 360
66 76 76 85 85 85 141 141 141 141 170 170 240 240 240 240 180 180 180 395 590
12 14 14 17 17 17 17 17 17 17 18 18 18 18 18 18 50 50 50 50 50
39 53 53 53 53 53 93 93 93 93 124 124 124 124 124 124 145 145 145 330 400
45 54 54 78 78 78 96 96 96 96 100 100 114 114 114 114 165 165 165 190 230
24 42 42 85 96 96 108 108 108 108 192 192 310 310 360 360 550 720 720 1080 1260
SA 6715 SA 6091 SA 6091 SA 6120 SA 6120 SA 6120 SA 6122 SA 6122 SA 6122 SA 6122 SA 6651 SA 6651 SA 6096 SA 6096 SA 6096 SA 6096 SA 6095 SA 6095 SA 6095 SA 6005 SA 6025
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SOTRAS
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SOTRAS Ref.
D1 (mm)
H1 (mm)
H2 (mm)
H3 (mm)
SM SM SM SM SM SM SM SM SM SM
9001 9002 9003 9004 9005 9006 9007 9008 9009 9010
3/8" 1/2" 3/4" 1" 1" 1 1/2" 1 1/2" 2" 2" 3"
21 21 21 43 43 43 43 48 48 74
209 209 279 315 415 515 715 823 1073 1202
16 16 16 16 16 16 16 16 16 12
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PRE FILTERS Series 1 Coarse filtration and dust removal Air flow through filter element- out to in
FINE FILTERS Series 2 General purpose protection Particle removal down to 0,1 micron. Maximum residual oil content down to 0,5 PPM. Air flow through filter element-in to out.
MICRO FILTERS Series 3 High efficiency Particle removal down to 0.01 micron. Maximum residual oil content down to 0,01 PPM. Air flow through filter element-in to out
ACTIVATED CARBON FILTER Series 4 Oil vapour and odour removal Particle removal below 0.01 micron. Maximum residual oil content down to 0,005 PPM. Air flow through filter element-in to out
FILTER ELEMENTS PREFILTER FINE FILTER MICROFILTER ACT.CARB. (series 1) (series 2) (series 3) (series 4) SERIES
SM SM SM SM SM SM SM SM SM SM
9001 9002 9003 9004 9005 9006 9007 9008 9009 9010
SM SM SM SM SM SM SM SM SM SM
9017 9021 9025 9029 9033 9037 9041 9045 9049 9053
SM SM SM SM SM SM SM SM SM SM
9018 9022 9026 9030 9034 9038 9042 9046 9050 9054
SM SM SM SM SM SM SM SM SM SM
9019 9023 9027 9031 9035 9039 9043 9047 9051 9055
SM SM SM SM SM SM SM SM SM SM
9020 9024 9028 9032 9036 9040 9044 9048 9052 9056
1 2 3 4
Sotras also offers a wide range of alternative elements suitable for other makes of housing.
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ACCESSORIES
Cyclon kits, differential pressure gauges, manual, automatic condense drains and technical specifications are available for all types.
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PRACTICAL ADVICE
Our products regularly undergo stringent quality control and only very seldom the malfunctioning of the compressor has to be ascribed to the filter itself. Here below are listed some of the most common causes which lead on to an improper functioning of the machine. Premature increase in pressure differential This usually occurs when compressors work under the following conditions: a) Air intake filter and oil no longer efficient b) Unsuitable or heavily contaminated oil c) Water contamination-recognised by rust deposits in separator tank To help in avoiding these problems, there should be frequent replacements of the Air and Oil filters and the oil should be changed completely at regular intervals. Check for deposits of varnish which can quickly block a separator. Compressor should not be run at excessively high temperatures. Excessive use of oil This normally occurs under the following circumstances: a) Separator not changed at the appropriate time. If the separator has reached the end of its lifespan or has worked in arduous conditions and is not replaced, it can suffer structural damage (collapse) or media breakdown causing oil carry-over. b) Blocked or malfunctioning scavenge tube. This situation increases the level of oil inside the separator and the amount of oil carry-over. To avoid this problem, the scavenge tube must be checked for correct length at every separator change and kept free from blockage. c) Incorrect oil level in tank. Overfilling with oil alters the pre-separation process and increases the quantity of oil in the air/oil mist thereby reducing the efficiency of the separator. Foaming created by the oil can also create this situation. d) Gaskets applied incorrectly or use of unsuitable or used gaskets. When installing a new separator the incorrect application of joints (bad seal) can cause heavy movements of oil thereby by-passing the separating system. e) Inefficient separation system. In some instances, the design of the compressor separation system is inefficient. In these cases the manufacturers improve the separation efficiency by adding baffles or through modification of separations by adding pre-separation media to the outside of the element. Collapsed separator causes This normally occurs under the following circumstances: a) Separator excessively contaminated b) Sudden surges caused by: - malfunctioning valves - sudden release of air to atmosphere (mobile compressors) c) Rotary compressors working in parallel with reciprocating compressors without a suitable air receiver. Flash fires These are very rare and are caused by several factors occurring simultaneously and not directly related to the Air/Oil separator. It is good practice to ensure that the gaskets have a reliable form of grounding by the use of suitable materials (at least one or two metal staples or metal foil) so that there is contact between the element and the separator tank.
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SOTRAS
QUALITY CONTROL AND GUARANTEE
The efficiency of our separators is tried through Johnson or Balston tests as well as the use of artificial smoke. All types of filters are passed to our Quality control Department for approval before being marketed and the performance of every batch in terms of resistance to cyclical and maximum working pressure regularly undergoes stringent laboratory tests We would like to emphasise that Sotras filters undergo stringent quality control and are frequently tested in order to ensure satisfactory operation in the application of which they are designed. Evidence of the high quality of our products lies in the fact that Sotras manufactures original equipment for some of the most important compressor manufacturers, to some of which Sotras guarantees product exclusivity. We guarantee that filters produced by Sotras are free from defects either in materials or construction, always provided that the machinery is maintained in accordance with manufacturers recommendations and filters are correctly installed and changed. Sotras will replace any item found to be defective as described above but will not be held responsible for any other replacement or contingencies or consequential loss.
In addition Sotras manufacturing quality system has had approved certification to UNI EN ISO 9002-94 since 1999. In year 2003, Sotras has gained a new certification to UNI EN ISO 9001-2000.
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SOTRAS
VIA DONATELLO, 13 - 10071 BORGARO TORINESE (TORINO) - ITALY TEL. 0039.011.262.22.22 - FAX 0039.011.262.41.41 www.sotras.com sales@sotras.com
Rev. 01 - 2004.01.30
The data in this brochure are not binding. With a view to continuous product improvement, reserves the right to make changes without prior notice.