( Reaffirmed 2005 ) IS : 1711 - 1984 Indian Standard SPECIFICATION FOR SELF-CLOSING TAPS FOR WATER SUPPLY PURPOSES ( Sanitary Appliances Second Revision ) and Water Fittings Sectional Representing Municipal Corporation of Greater Bombay \ Committee, BDC 3 Chairman SHRI K. D. MULEKAR Mambers Central Public Health & Environmental Engineering Organization ( Ministry of Works & Housing ), New Delhi DEPUTY ADVISER ( PHE ) ( Alternate ) National Test Housr, Calcutta SERI S. K. BANERJEE SHRI D. K. KANUNGO ( Allernate ) Central Glass & Ceramic Research Institute ( CSIR ), SARI M. K. BASU Calcutta Public Health Engineering Department, Government CHIEF ENGINEER of Kerala, Trivandrum SHRI K. RAMACHANDRAN ( Altmate) U. P. Jal Nigam, Lucknow CHIEF ENGINEER SUPERINTENDING ENG~EER ( Altwnate ) Municipal Corporation of Delhi S-1 J. D' CRUZ SHRI S. A. SWAMY ( Alternate ) Bombay Potteries & Tiles Ltd, Bombay DIRECTOR Engineer-in-Chief's Branch, Army Headquarters SHRI B. R. N. GUPTA SHRI K. V. KRISHNANUKTEY ( Alternate ) E.I.D. Parry ( India ) Ltd, Madras SHRI P. JAGANATH RAO SERI M. MOOSA SULALMAN( Alternate ) Municipal Corporation of Greater Bombay SRRI A. F. KEAN DEPUTY HYDRAULIC ENGINEER ( Alternate ) National Environmental Engineering Research SI~RI S. R. KSHIRSA~AR Institute ( CSIR ), Nagpur SHRI R. C. REDDY ( Alternate ) Hindustan Shipyard Ltd, Vishakhapatnam SKRI K. LAKSHMINARAYANAN SHRI A. SHARIFF ( Alternate ) National Buildings Organization, New Delhi DR A. V. R. RAO SERI J. SENQUPTA ( Altcrnate ) Railway Board ( Ministry of Railways ) SENIOR CIVIL ENGINEER (WATER SUPPLY ) ADVISER ( PHE ) ( Continued on page 2 ) @ Copyright 1986 INDIAN STANDARDS INSTITUTION This publication is protected under the In&n Copvright Act ( XIV of 1957 ) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act. IS : 1711 - 1984 ( Continued from puge 1 ) Members SARIS. K. SXARMA SHRI R. K. SOMANY Cent;oLrkBiilding Representing Research Institute ( CSIR ), SUPERINTENDING OF WORKS ( NDZ ) SURVEYOR OB WORKS I ( NDZ ) ( AIternate ) SHRI R. THAXJAN Hindustan Sanitaryware & Industries Limited, Bahadurgarh SURVEYOR Central Public Works Department, New Delhi Directorate General of Technical Development, New Delhi SHRI M. M. ALlKllAN ( Alternate ) Directorate General of Supplies & Disposals, S>r::r T. N. U~OVXJA New Delhi Director General, IS1 ( Ex-o$cio Member ) SHRI G. RA~~AS, Director ( Civ Engg ) Secretary S~rrrr C. K. BEBARTA Joint Director ( Civ Engg ), IS1 Domestic and Municipal Water Fittings Subcommittee, BDC 3:Q M/9 Goverdhan Das PA., Calcutta ( Alternate ) Bangalore Water Supply S; Sewerage Board Tamil Nadu Water Supply & Drainage Board, Madras U. I'. Jal Nigam, Lucknow CHIEF ENGINEER SUPE~~INTENDINC ENUINEEI~ ( Alternate ) Municipal Corporation of Delhi SIIRI J. D'Cxcz SH~I S. A. SWAXY ( Alternate ) Research Institute Maharashtra Engineering DIRECTOR ( Government of Maharashtra ), Nasik RESE ARCHOFFICER I Alternate ) Engineer-in-Chief's Branch, Army Headquarters SRRI B. R. N. GUPTA SHRI K. V. KRISHNAMURTHY ( Ahnate ) Municipal Corporation of Greater Bombay HYDRAUIX ENGINEER DF.PUTY HYURAULIC EKGINEER CAlternate ) Hind Trading & Manufacturing Co Ltd, New Delhi SHRI M. K. J 41N SHRI K. K. JAIN ( Alternate ) Environmental Engineering Research National SHRI S. R. KSHI~SAGAR Institute ( CSIR ), Nagour . `. -. SHRI A. W. DESRPAND~ ( Alternate I Bombay Metal and Alloy Manufacturing Co Pvt SHRI G. A. LUHAR Ltd, Bombay Public IHealth Engineering Department, GovemSmxr K. RAMACHANDR~N ment of Kerala, Trivandrum Leader Engineering Works, Jalandhar SRRI D. K. SEHGAL SIIRI B. B. SIREA ( Altmnate ) SEVIOR CIVIL ENGINEER ( WATER Railway Board ( Ministry of Railways ) SUPPLY ) Hindustan Sanitaryware & Industries Ltd, &RI R. K. SOJlAXY Bahadurgarh General of Supplies & Disposals, Directorate SHRI T. N. UBOVEJA New Delhi SHRI JOGISDXR RAJ AGQAKWAL SHFI Yas~ RAJ AGGARWAL CHIEF EN~INEFR CHIEB ENGINEER 2 IS:1711-1984 Indian Standard SPEClFlCATlON FOR SELF-CLOSING TAPS FOR WATER SUPPLY PURPOSES ( Second Revision ) 0. 0.1 This FOREWORD Indian Standard ( Second Revision ) was adopted by the Indian Standards Institution on 31 May 1984, after the draft finalized by the Sanitary Appliances and Water Fittings Sectional Committee had been approved by the Civil Engineering Division Council. 0.2 Conservation of water is an important duty of the civic body in every growing city or town and prevention of the wastage of water in public amenities is a major step towards achieving this objective. In order to minimize the wastage of water, the taps provided at such places should be of the self-closing type so that they automatically close when With this objective this Indian Standard was first issued in not in use. 1960 prescribing performance, construction and other essential requireThe standard was subsequently revised in 1970. ments. 0.3 The revision of this standard has been taken up to incorporate further changes necessary in the light of the comments received by usage of this standard since its publication. This revision includes modifications relating to materials for different component parts, finish, etc. 0.4 Self-closing taps are available in many designs and the illustrations given in this standard are not intended to limit them to the types shown. The illustrations are only indicative of the general construction and component parts ofself-closing raps and any type of design may be accepted provided the minimum requirements laid down in the standard are complied with. 0.5 For the purpose of deciding whether a particular requirement of this 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*. The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard. *Rules for rounding off numerical values ( nuked 3 ), 1. SCOPE 1.1 This standard lays down requirements without stuffing box. 2. TERMINOLOGY 2.0 For the purpose of this standard, the following definition shall apply. for self-closing taps with or 2.1 Self-Closing Tap - A self-closing tap is a draw-off tap which remains in the open position so long as a lever handle is kept pressed up, down or sideways, or a pushbutton is kept pressed in, and closes by itself or when the button or the lever handle is released; the self-closing taps may incorporate a device which closes the tap even without the release of the button or the handle after a fixed quantity is discharged. 3. NOMINAL SIZE 3.1 Self-cIosing taps shaI1 be of the following nominal sizes: a) 15 mm, and b) 20 mm. 3.1.1 Nominal connection. 4. MATERIAL 4.1 Suitable materials for the manufacture of the body and parts of self-closing taps are given in Table 1. 5. MANUFACTURE AND WORKMANSHIP component size shall refer to the nominal bore of the inlet 5.1 All castings shall in all respects be sound, free from laps, blow holes and pittings. External and internal surfaces of the castings shall be The castings shall be neatly dressed clean, smooth and free from sand. and no casting shall be burned, plugged, stopped or patched. 6. DESIGN 6.1 Operation - The opening of the tap shall be performed by hand pressing of the handle up or down or turning sideways or by pressing in of the pushbutton, and the tap shall close when the handle or pushbutton The force required for operating the self-closing tap for its is released. full opening shall not exceed 70 N. For self-closing taps which operate against heads exceeding 2 m, a non-concussive function is essential and provision to this effect shall be made in the design. IS:1711- 1984 TABLE 1 MATERIALS FOR COMPONENT SELF-CLOSING TAPS ( Clause 4.1 ) PARTS OF EJ. 11) 3 COYPOIEHT (s) (2) Body, cover and ;;tyon or push- MATERIAL (S) (3) a) Grev cast iron b) Malleable iron castings c) Cast brass 4 Leaded tin bronze CONFORMINO TO (4) Grade FG 200 of IS Grade BM 290 of IS Grade LCB 2 of IS Grade LTB 2 of IS IS : 280-19781; Grade LTB 2 of IS IS IS : 210-1978' : 2108-1977t : 292-1983$ : 318-1981s : 318-1981s ii) Spindle a) Mild steel bronze b) &d:%! iii) Spindle spring 4 Phosphor c) b) bronze wire Spring steel wire corrosion Any resisting alloy having a tensile strength of not less than that of phosphor bronze wire : 7608-1975'11 : 4454 ( Part 3 )-1975** iv) v) vi) vii) Cage and valve Brass washer Seat washer and other washers Gasket Leaded tin bronze Brass As specified in a) Vulcanized fibre b) Any other equally suitable material Grade LTB 2 or LTB IS : 318-1981s IS IS 3 of : 410-1977tt : 4346-1982$$ : 4346-1982$$ 5.5 of IS NOTE - Mild steel spindles are suitable for use with cast iron pushbutton type self-closing taps only. and malleable iron *Specification for grey iron castings ( third reuision ). ISpecification for blackheart malleable iron castings (Jirst r&ion ). $.Specification for leaded brass ingots and castings ( second revision ). gspecification for leaded tin bronze ingots and castings ( smond r&ion ). IlSpecification for mild steel wire for general engineering purposes ( third revision ). l/Specification for phosphor bronze wires ( for general engineering purposes ). **Specification for steel wires for cold formed springs: Part 3 Oil hardened and tempered spring steel wires - Alloyed (Jirst rcuision ). HSpecification for cold rolled brass sheet, strip and foil ( third revision ). $$Specification for washers for use with fittings for water services (first rmision ). 5 IS : 1711 - 1984 6.1.1 At the option of the purchaser, the self-closing tap may be designed to close by itself even without the release of the button or handle, after discharging not less than 5 litres or more than 10 litres of water at a time by providing a capillary groove in the valve, which shall slide in the bottom hollow chamber of the spindle, or by any other equally suitable device. 6.2 Body and Gland 6.2.1 usage. The body shall be strong and durable and shall withstand rough 6.2.2 Handle-operated self-closing tap may be constructed with or without stuffing box and gland and, in the latter type, adequate provision shall be made to prevent leakage through the lever handle slct by providing bushing to the spindle and a washer pegged to the spring, preferably on the underside. 6.2.3 In the case of pushbutton-operated self-closing tap, instead of a threaded gland and packing, a retaining metal ring with washer shall be provided on a seating in the stuffing box, pegged to the underside of the spring, to prevent leakage through the bonnet face. 6.3 Valve and Spindle 6.3.1 The valve operation shall be performed spindle or any other equally effective device. by a spring-loaded 6.3.2 The valve fit to the spindle. shall be integral with the spindle or shall be a snug threading of the inlet connection shall 6.4 Screw Threads - The conform to IS : 554-1975*. 6.5 Washers - Dimensions and other relevant requirements shall conform to IS : 4346-1982t. 6.6 Two typical designs of self-closing taps are illustrated 7. FINISH of washers in Fig. 1. shall be so carried out that the parts are true to shape and are in correct adjustment when assembled. All machined surfaces shall be smoothly finished. 7.2 If the body is of leaded polished bright. tin bronze, the outside surface shall be 7.1 All machining *Dimensions for pipe threads where pressure tight joints are required on the threads ( second mision ). +Specification for washers for use with fittings for water services (Jir~t rmision ). 6 IS : 1711- 1984 7.3 In case the fittings are nickel plated, the minimum thickness of If required, the fittings may further nickel plating shall be O-015 mm. be chromium plated and the minimum thickness of plating shall be 0.000 25 mm. The plating shall be capable of taking a high polish which shall not easily tornish or scale. A B C Spindle Kut for washer Seat washer Body Washer Puzhbutton F G Brass washer Spring! Pushbutton Brass washer Brass washer 2 m ) H J D B 1A K Concussive Type ( For Heads Not Exceeding FIG. 1 SELF-CLOSING TAPS - Continued 7 IS : 1711- 1984 A B Spring Spindle Cover Body Cage 1B Non-concussive F G Valve nut Gasket Lever c D H 3 Seat washer Lever Type E FIG. 1 SELF-CLOSING TAPS 8 IS : 17117.4 Galvanization of malleable by the hot-dip process ( SC IS : when made of mild steel shall 1970t ). External surfaces of the if so desired. 8. TESTS 1984 iron and cast iron bodies shall be done 2629-1966* ). Pushbutton and spindle be electro-galvanized ( see IS : 1573body and handle may also be painted 8.1 When the tap is assembled shall withstand an internally minimum period of 2 minutes complete with its component parts, it applied hydraulic pressure of 2 MPa for a without leakage or sweating. 8.2 In the open position of the tap, the flow of water at the outlet end and when the handle or pushbutton is shall be steady and uniform, released, the flow shall cease completely without dripping. 8.3 Endurance Test - When the tap is subjected to 50 000 operations of actuating the handle or pushbutton from its normal shut position to the full open position and releasing it, it shall not show any leakage or failure of the spring or other working parts. 9. SAMPLING AND CRITERIA FOR CONFORMITY 9.1 Lot - In any consignment, all the taps of the same nominal size, manufactured under similar conditions of production, shall be grouped together to cor)stitute a lot. to the to the 9.2 All the tais in a lot shall be examined for finish and subjected tests given in 8.1 and 8.2. The taps which do not conform corresponding requirements be rejected. 9.3 The number of the taps to be subjected to endurance test ( see 8.3 ) shall be in accordance with Table 2. These taps shall be selected at random from the lot. For ensuring randomness of selection, procedures given in IS : 4905-1968$ may be followed. 9.4 The lot shall be considered as conforming to the requirements of endurance test if all the taps selected as in 9.3 satisfy the test requirements. In case 1 or 2 taps fail, twice the number of taps shall be selected from the lot and subjected to the test. The lot shall be considered as conforming to the requirements of the test if all the taps retested satisfy the test requirements. If the number of taps failing in the first sample exceeds two or three is a failure in the retest, the lot shall not be accepted unless every tap is verified. *Recommended practice for hot-dip galvanizing of iron and steel. tspecification for electroplated coatings of zinc on iron and steel (Jirst rctisit~n ). $Methods for random sampling. 9 IS:1711-1984 TABLE 2 SAMPLE SIZE ( Clause 9.3 ) LOT SIZE NUMBER OF TAPS TO BE SELECTED up to 200 2 3 4 5 7 201 to 300 301 to 500 501 to 800 801 and above 10. MARKING 10.1 Each tap shall be clearly following information: and permanently and marked with the a) Manufacturer's name or trade-mark, b) Nominal size of the tap. 10.1.1 The taps may also be marked with the IS1 Certification Mark. NOTE - The use of the IS1 Certification Mark is governed by the provisions of the Indian Standards Institution ( Certification Marks ) Act and the Rules and Regulations made thereunder. The IS1 Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well-defined system of inspection, testing and quality control which is devised and supervised by IS1 and operated by the producer. IS1 marked products are also continuously checked by IS1 for conformity to that Details of conditions under which a licence for the standard as a further safeguard. use of the IS1 Certification Mark may be granted to manufacturers or processors, may be obtained from the Indian Standards Institution. 10