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इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 14875 (2000): Compressed Air Filters - Evaluation Parameters [PGD 16: Fluid Power] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 14875:2000 %’?dkTWiw Indian Standard COMPRESSED AIR FILTERS — EVALUATION PARAMETERS ICS 23.100.60 Q BIS 2000 BUREAU OF INDIAN STANDARDS MANAK BHAVAN,9 BAHADUR SHAH ZAFAR MARC NEW DELHI 110002 Price Group 3 Pneumatic Fluid Power Systems Sectional Committee, BP/PE 16 FOREWORD This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Pneumatic Fluid Power Systems Sectional Committee had been approved by the Basic and Production Engineering Division Council. In pneumatic fluid power systems, power is transmitted and controlled through air under pressure within a — circuit. Where mechanical filtration of the air media is desired, filters are components designed to remove solid and liquid contaminants from compressed air. This Indian Standard specifies the requirements for compressed air filters used in pneumatic fluid power systems. The requirements laid down in this standard shall be included in the supplier’s literature. The aim of the standard in addition to others is: a) Tofacilitate the comparison of filters by standardizing test methods and presentation of test data, and b) To assist in the proper application of filters in compressed air systems. The tests specified are intended to allow comparison between different types of filters and they are not production tests to be carried out on each filter manufactured. The units from IS 10005 : 1994 are generally used in pneumatic fluid power systems, in particular: a) Gauge pressure expressed in kilopascals (bar), b) Temperature expressed in degrees celsius, and c) Flow rate expressed in cubic decimetres per second (ANR). While preparing this standard, cons i derable assistance has been derived from the following standards issued by the International Organization for Standardization (1S0): 1S0 5782-1 : 1997 Pneumatic fluid power — Compressed air filters — Part 1 :Main characteristics to be included in supplier’s literature and product-marking requirements 1S0 5782-2 : 1997 Pneumatic fluid power — Compressed air filters — Part 2 : Test methods to determine the main characteristics to be included in supplier’s literature This standard is technically equivalent to above international standards. For the purpose of deciding whether a particular requirement of thk standard is complied with, the final value, observed or calculated, expressing the result of a test, shall be rounded off in accordance with IS 2: 1960 ‘Rules for rounding offnumerical values (revised)’. The number of signKlcant places retained in the rounded of value should be the same as that of the specified value in this standard. IS 1487S: 2000 Indian Standard COMPRESSED AIR FILTERS — EVALUATION PARAMETERS 1SCOPE IS No. Title 1.1This stamkud laysdown the evaluation parameters 10416: 1992 Fluid power systems and compo- for air filters used in pneumatic fluid power system. nents — Vocabulary (first revision) L2 This standard is applicable to compressed air filters, manufactured from light alloys (ahunininm, 14740: 1999 Pneumatic fluid power — Com- etc), zinc diecast alloys, brass, steel and plastic, with ponents using compressible fluids a rated pressure of up to 1 600 kPa (16 bar) and a — Determination of flow rate maximum temperature of 80”C, designed to remove characteristics solid and liquid contaminants from compressed air 3 DEFINITIONS by mechanical means. For thepurpose ofthis standar~ the definitions given 2 REFERENCES in IS 10416 shatl apply together with the following. The following standards contain provisions which, 3.1 Rated Pressure through reference in this text, constitute provisions of this standard. At the time of publication, the Pressure, cordirmed through testing, at which a editions indicated were valid. Allstandards are subject component or piping is designed to operate for a to revision, and parties to agreements based on this number of repetitions sutlcient to assure adequate standard are encouraged to investigate the possibility service life. of applying the most recent editiom of the standards 4 TECHNICAL REQUIREMENTS indicated below: Descriptive literature covering compressed air filters is No. 1itle shall include the following characteristics. 554 : 1999 Pipe threads where pressure tight 4.1 General Characteristics joints are made cmthe threads — Dimensions, tolerances and 4.L1 General Dimensions designation (jowth revision) The various dimensions in millimetres (mm) shali be 1076 Preferred nu m bers :Part 1Series designated by the alphabets as given in Fig. 1, (Part 1):1985 of preferred n umbers (second 4.1.2 Port Forms revision) Port forms maybeeither with pipe parallel threads as 2643 : 1999 Pipe threads wl!ere pressure tight Per IS 2643 or wkh pipe taper threads as per IS 55$. joints are not m,!decmthe threads — Dimensions, tolerances and 4.1.2.1 The connecting interface for flange-mounted designation (se~ond revision) design maybeplain ported and countetired toaccept 5107: 1969 Recommendations on nominal o-rings. pressure for oil hydraulic system 4.1.2.2 Forcertain applications and connections, other elements port forms may be employed. 9466 : 1980 Viscosity classification of indus- 4.1.3 Rated Pressure trial liquid lubricants Compressed air filters shall be classified according 10005 : 199$ S1units and recommendations for to a pressure, selected from the preferred pressures the use of their multiples and of listed inIS 5107. The rated pressure shall be verified certain other units (second using the test procedure, specified in 7. revision ) 1s 14875:2000 I D 1- I i I G t w i t — L la ..— I t F t -+EG--M--I-- f H. Minimum clearance tlom the port centreline to permit dismantling Maximum overall width Maximum installation height below the port J2) = Distance between mounting holes centrel ine p) . Distance between theport centreline andmounting Maxinmm overall depth,excluding pl-essuregauge holes Distance between tile faces of the compressedair L2) = Minimum diameter and length of mounting holes connection (inlet/outlet) orrecommended mounting bolts Maximum height abov e the port centreline v= Drain holedescription (excluding optional pressure- drop indicator) w= Portdescription Maximum installation depth&otntheportcentreline Optional pressure-drop indicator 2)DimemiomJ,KandLshall be indicsted only iftJredevice hasprovisloris .— for mounting II ApplIes AO for mountmg bracke~ Fl~. 1 DIMENSIONOSF FILTERS 4.1.4 Range of Operating Temperatures 4.2 Particular Requirements 4.1.4.1 The temperature range in which the material 4.2.1 The data provided by the supplier shall assist and the operation of the filter are not impaired shall the user in selecting the compressed air filter which be stated. isbest suited for the particular application. 4.1.4.2 Alternate combinations ofconstant maximum 4.2.2 Pressure Drop — Ah Flow Rate operating pressure and temperature ratings when The pressure drop at three inlet pressure levels of optional designs may require a different rating shall 250 kPa; 630 kP& 1 000 kpa (2.5 baL 6.3 bar; be specified. 10bar) or rated pressure if different from 1000 lcpa 2 IS 14875:2000 (1(1bar) shall be measured in accordance with 8, for 4.2.5 Materials ofConstruction each port size, filter clement type (clean and dry) The generic materials of construction (for example, and reservoir size. The pressure drop at additional body, spring cage, bottom plug and internal parts, inlet pressures, such as described in 1S 5107 or elastomers and bowl) shall be listed. elsewhere, may also be recorded. Results shall be presented in either graphical or tabular form. TWical examples are given in Fig. 2 and Table 1. x 1 —kPal —bar) a _ kPa(—bar) o cc n // /— kPa(—bar) w“[&, w 3 u-r u) INLET PRESSURE IN K~a(bar) w MODEL NUMBER : AIR FLOW RATE(dm3/~, ANR) Fm. 2 FILTERPERFORMANCE Table 1 Air Flow Rate at a Pressure Drop Which 5 OPERATION AND MAINTENANCE Equals 5 Percent of Inlet Pressure for Filter Information required for application, operation, Model Number examination and maintenance, shall be provided and (Clauses 4.2.2 and 8,6) include: a) the value of pressure drop at which the filter element shouldbereplaced in order toprevent malfunction; I I Air flow rat(edn]3/s,.4N’R) I b) the products that can be used for cleaning the airfilterparts (forexample, element, resavoir, etc); c) the minimum temperature that can be used, with a suitable warning of the effects of condensate freezing, if applicable; and d) the minimum pressure at which the drain mechanism starts to operate. 4.2.3 iIsejul Retention Capacit,v of [he Reservoir 6 TEST CONDITIONS The useful retention capacity ofthe reservoir shall bc measured in accordance with 9, for every reservoir 6.1 Temperature size. Results shall bc published w’ilhother descriptive The temperature of the processed air, the equipment specif’lcationsfor filters. and the ambient air temperature shall be maintained at 25 f 10”Cfor all tests. 4.2.4 [Jraining Devices The t}pe of drain fitted for manual, automatic or any 6.2 Pressures othcr operation shall be stated. The specified pressures shall be held to within M percent. The preferred test pressures are those given 3 1S 14875:2000 in 4.2.2 or from IS 5107. Where other test pressures 7.7 The proposed rated pressure will beveritled ifall are required, the value shall be chosen from series three samples pass the test. R5 of preferred numbers, according to IS 1076 7.8 Where a unit or sub-assembly in the unit (for (Part l). example, reservoir/sight-glass) is constructed of 7 TEST PROCEDURE TO VERIFY RATED different materials, the highest appropriate factor PRESSURE shoutdbeused.The apptied pressure maybe restricted to the area of the interface between the different 7.1 The test shall be performed on three random materials. samples with a proposed rated pressure for the product. 7.9 Where the design of the pressure-containing envelope is covered by a statutory pressure vessel 7.2 In this test, the product-sealing means can be code, the requirements of that code take precedence modtiled to prevent leakage and 311owstructural over the requirements stated in this standard. .— failure to occur; but modifications must not increase the structural strength of the pressure-con~ining 8 FLOW RATE TESTS envelope. 8.1 The test circuit shall comply fully with those 7.3 Fill samples with a liquid of viscosity that does described in Fig. 1,Table 3 and 5.3 of IS 14740. not exceed ISO VG 32 according to 2.2 and Table 1 8.2 The measuring tubesshall comply fullywith those of IS 9466 and install them in the temperature described in Fig. 3, Table 4 and 5.4 and 5.5 of environment described in 6.1. IS 14740. 7.4 Atler stabilizing the temperature, pressurize slowly 8.3 Each seriesof results obtained for a specified test to a level of 1.5 times the proposed rated pressure. condition shall be recorded as soon as a steady-state Hold at this level for 2 min and obseme for leakage condition has beenreached.Recording shall becarried or failure (.~ee7.6), out with care and with a sufllciently slow period of 7.5 If there is no leakage or failure, increase the change in conditions to avoid a drift in the steady- pressure byapproximately half of itsproposed rating. state characteristic. A periodic check shall be made Hold atthis pressure for 2 min and observeforleakage to verify that no pressure intakes of the measuring or failure (see 7.6). instruments are blocked by solid or liquid particles. If there is still no leakage or failure, in terms of the 8.4 Set the inlet pressure to test Ievcls of 250 k%; following units: 630 kpa; 1 000 kpa (2.5 bar; 6.3 ba~ 10 bar) or apply the rated pressure if different from 1 000 kpa a) Units Constructed qf Light Ailoy.s, Brass and (10 bar). Adjust the inlet pressure during the flow- Steel mte test to nvdintain it constant. Continue raising the pressure as above until a level of 4 times the prop osed rated pressure 8.5 Begin circulating air through the test circuit, has been reached; recording flow rate and pressure drop, up to a maximum flow-rate corresponding to a pressure drop b) [Jnits C’onstrucled oj_Zinc Diecast Alloys or equal to the lesser of 80 kPa (0.8 bar) or 20 percent Plastic.v of the inlet pressure. — operating temperatures up to 50”C. 8.6 The results shall be presented in accordance with Continue raising the pressure as above until a level 4.2.2, Fig. 2 and Table 1 recording the size of port of 4 times the proposed rated pressure has been and the type of filter element used in the test, or reached. according to Table 1 where the flow at which the pressure drop is 5 percent of the inlet pressure is -– operating temperature bet~~een 50°C and iabulated. Woe, 9 USEFUL RETENTION CAPACITY Continue raising the pressure as above until a level MEASUREMENT OF THE RESERVOIR of 5 times the proposed rated pressure has been reached. 9.1 This test method determines the capacity of a filter reservoir with a manually operated drain and is 7.6 Criteria for a failure are a fracture, a separation also applicable to semi-automatic drains. of parts or a crack, or any phenom.mon which can pass liquid across the pressure con[iiiniag envelope 9.2 Select three random samples of complete filters sufficiently to wet the outer surface. Leakage across from normal production units, for each size of filter- the port threads may not constitute a failure unless reservoir element. caused by a fracture or crack. 4 Is :4875:2000 9.3 With the drain closed and the filter completely d) maximum temperature; assenb]cd, measure the amount of liquid necessa~ e) warning about cleaning products, if tofill thcrcscrvoi rtoapoilit where lhc liquid touches applicable; [hc bottom extremities of the baffle. Where there is f) direction of flow, no batYlc.the maximum level of iidmissible liquid and the specified volume comcspomlingtot hismark g) maximum fluid levels (if practical); shall be marked on the reservoir. h) code to indicate date of manufacture; and 9..t Dctcrmine theaverage for each moupofsarnples. j) nominal micron rating of the filter element This will bethe rated reservoir capa;ity for the given 10.2 BIS Certification Marking reservoir/element combination size The compressed air filters may also be marked with 10 MARKING the Standard Mark. 10.1 Each compressed air filter shail be marked with 10.2.1 The use of the Standard Mark is governed by the following information: the provisions of the Bureau of Indian Standards a) the manufacturer’s or supplier’s name or Act, 1986 and the Rules and Regulations made trade-mark; thereunder. The details of conditions under which b) the rnanufaeturer’s orsupplier’s modelortype the license for the use of Standard Mark may be number; granted to manufacturers or producers may be obtained from the Bureau of Indian Standards. c) rated pressure; 5