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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 15466 (2004): Rubber seals for hydraulic gates [WRD 12: Hydraulic Gates and Valves] “!ा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 15466:2004 Indian Standard RUBBER SEALS FOR HYDRAULIC GATES — SPECIFICATION ICS 93.160 0 BIS 2004 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARC NEW DELHI 110002 Price Group 5 Hydraulic Gates and Valves Sectional Committee, WRD 12 FOREWORD This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Hydraulic Gates and Valves Sectional Committee had been approved by the Water Resources Division Council. To prevent flow of water past closed hydraulic gates, seals are provided either on the gate or on ametal frame on the gate slot. Rubber is the most commonly used material for such seals as it is elastic, deforms readily and regains its original shape on the removal of load. The provisions of this standard were earlier covered in IS 11855:1986 ‘Guidelines for use of different types of rubber seals for hydraulic gates’. In this revision only the guidelines for the use of different types have been retained while the different type of rubber seals and the specification of rubber material are now being covered in a separate standard. There isno 1S0 Standard on the subject. Assistance has been drawn from ASTM D2137 ‘Standard test methods for rubber property — Brittleness point of flexible polymers and coated fabrics for the method of test for low -- temperature brittleness’. The composition of the technical Committee responsible for the formulation of this standard is given in Annex C. For the purpose of deciding whether aparticular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2:1960 ‘Rules for rounding off numerical values (revised)’. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. IS 15466:2004 Indian Standard RUBBER SEALS FOR HYDRAULIC GATES — SPECIFICATION 1 SCOPE ISNo. Title This standard lays down the types and specification for (Part 6) :1983 Resistance toliquids (jlrst revision) rubber seals used for all common types of hydraulic gates. (Part 23) :2002 Rubber determination of indenta- tion hardness by means of pocket 2 REFERENCES hardness meter The stmdards listed below contain provisions which 3 MATERIALS through reference in this text constitute provisions of this standard. At the time of publication, the editions 3.1 The basic polymer shall be natural rubber, or a indicated were valid. All standards are subject to co-polymer of butadiene and styrene, or a blend of revision and parties to agreements based on this both and the compound shall contain not less than 70 standard are encouraged to investigate the possibility percent, by volume, of the basic polymer and the of applying the most recent editions of the standards remainder shall consist of reinforcing carbon black, indicated below. zinc oxide, accelerators, antioxidants, vulcanizing agents and plasticizers. ISNo. Title 3.2 Rubber seals should be moulded only ensuring 3400 Methods of test for vulcanized homogeneous section. These may be cladded by rubbers flourocarbon. (Part 1):1987 Tensile stress-strain properties 4 PHYSICAL REQUIREMENT (second revision) The compound shall have the physical properties as (Part 4) :1987 Accelerated ageing (second shown in Table 1. revision) Table 1 Physical Properties (Clause 4 and Table 3) S1No. Property Requirement MethodsofTest,Refto A / \ 1SNo. Annex (1) (2) (3) (4) (5) i) Shore Adurometer hardness 65L5 1S3400 (Part 23): 2002 — i]) Elongation atbreak, percent, Min 450 IS3400 (Part 1):t987 — Ill) Tensile strength, N/mm2, Mirt 14.5 1S3400 (Part 1):1987 — iv) Mass of’water absorbed in7days, percent, 10 1S34fM(Part 6): 1983 — Max v) Tensile strength after accelerated aging test Shall not beless than 80percent 1S3400 (Part 4):1987 and — of48 hinoxygen at70i l°C and 2.1 1 0.1 ofthestrength before aging 1S3400 (Part I):1987 N/mn]2pressure \i) Low tenmemture brittleness Non brittle after 3min–40”C — A 1 IS 15466:2004 5 TYPES, SHAPES AND DIMENSIONS shown in Fig. 10 (see page 7) to overcome the drawback of reduced flexibility of fully cladded seals. 5.1 The length of the seal should preferably be limited to3m, unless otherwise agreed between the purchaser 6.3 Cladding of seals maybe done with fluorocarbon and the manufacturer. All the comer seals should be or teflon. The fluorocarbon cladded seals have more fully moulded. The most common types ofrubber seals flexibility and a very low value of friction. used in gates are given in Table 2. 6.4 The seal should not fail in adhesion between the rubber and the cladding. The test should ensure Table 2 Types of Rubber Seal adhesion bond of 176 N/cm width of the seal for a (Clauses 5.1 and 8.1; and Table 3) separation rate of 2.5 cm/min. s] TypesofRubber Designation Refto 6.5 The test should ensure adhesion bond between the N0. Seal Fig. fluorocarbon and rubber as 54 N/cm width of the seal i) Angle shirped seals ASS 1 for a separation rate of 5cm/min. ii) Flat/wedge seals Flws 2 iii) Music note seal MNS 3 7 SAMPLING Iv) Double caisson seal DCS 4 7.1 Scale ofSampling and Criteria for Conformity i,) Double bulb seal DBS 5 For the purpose of ascertaining conformity to this vi) Corner seals: 1) Type I CST I 6 standard the scale of sampling and criteria for 2) Type 11 CST 11 7 conformity shall be as prescribed in Annex B. 3) Type III CST 111 8 4) Type IV CST IV 9 8 MARKING NOTE — Allcorner seals should befully moulded. 8.1 Each rubber seal or packing or both shall be tnarked indelibly with the: 5.2 The tolerance on sectional dimension of all seals shall be t 0.5 percent, however tolerance shall not a) manufacturer’s name or trade-mark, apply to the thickness of cladding film. b) designation/Type of seal as per Table 2, and c) month and year of manufacture. 6 ADDITIONAL REQUIREMENTS FOR CLADDED SEALS 8.2 BIS Certification Marking 6.1 Rubber seals are fluorocarbon cladded to reduce Each rubber seal or packing or both may also be frictional forces. The fluorocarbon is introduced into marked with the Standard Mark. the mould along with the raw unvulcanized rubber 8.2.1 The use of Standard Mark is governed by the compound and gets moulded or vulcanized provisions of the Bureau of Indian Standards Act, simultaneously with the rubber so that the film is 1986 and the Rules and Regulations made thereunder. inserted or recessed into the rubber. The normal The details ofconditions under which alicence for the thickness of cladding should not b e less than 1mm. use of the Standard Mark may be granted to 6.2 These seals are less flexible than rubber seals. The manufacturers or producers may be obtained from the cladding may be provided on portion of the seal as Bureau of Indian Standards. 2 IS 15466:2004 -q20r TYPE 1 TYPE 11 ‘ 77 17 25 tF- R7 L R15 RL ~-. L“R’v A 90—++ tl_88+ TYPE -111 TYPE-IV Alldimensions inmillimetres. FIG. 1 COMMONSIZESOFANGLESHAPEDSEALS NOTE—The dimensions ofthe seals shown inthe figure may betaken as indicative and nearest size seals asper moulds available with the manufacturers may also beused. Alldimensions inmillimetres. FIG.2 COMMONSIzix OFFLATSEAN NOTE — The dimensions ofthe seals shown inthe figure may betaken asindicative and nearest size seals asper moulds available with the manufacturers may also beused. 3 IS 15466:2004 SOLID BULB SEAL HOLLOW 8ULB SEAL Dimensions S1No, Description J D d t 1. Solid&Hollow 57 22 10 8 2. do 100 44 25 14/18 3. do 125 44 25 14/18 NOTE — The dimensions ofseals shown inthe tigure may bctaken asindicative and nearest size seals asper moulds available with the manufacturers may also beused. Alldimensions inmillimetres. FIG. 3 COMMON SIZESOFMUSIC NOTE SEALS .- 1 t +’ I SOLID DOUBLE STEM SEAL I SDLIDDOUBLE STEM SEAL I TYPE - I TYPE - II ‘~ HOLLOW DOUBLE STEM SEAL SOLID DOUBLE STZM WITH SOLIDDOUBLE STEM WITH BULBS AT ENDS TYPE - I BULBS AT ENDS TYPE - II NOTE — The dimensions ofseals shown inthe figure maybe taken asindicative and nearest size seals asper moulds available with thernanufacturers mayalso beused. (Thickness ofstemshall notbeless than 14mm.) Alldimensions inmillimetres. FIG.4 CO,MMON SLZESOFDOUBLESTEM SEALS 4 IS 15466:2004 p+----/J6-++27 DOUBLE BULB SEAL NOI’E — The dimensions ofseals shown inthefigure may betaken asindicative and nearest size seals asper moulds available with the manufacturers may also beused, Alldimensions inmillimetres. FIG.5 COMMONSIZEOFDOUBLEBULB SEAL I 1---A 1 — A T A A _ T SECTION AA (ENLARGED VIEW) SECTION AA (ENLARGED VIEW) FIG.6 DETAILOFMOULDEDCORNERSEAL FIG.7 DETAILOFMOULDEDCORNERSEAL