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IS 7054 (1973): Specification for Casing for Bucket

Elevators [MED 6: Continuous Bulk Conveying, Elevating,
Hoisting Aerial Ropeways and Related Equipment]

“!ान $ एक न' भारत का +नम-ण”

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है”
ह
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“Knowledge is such a treasure which cannot be stolen”
 IS : 7054 - 1973
(Reaffirmed 2002)
Indian Standard
SPECIFICATION FOR
CASING FOR BUCKET ELEVATORS

( First Reprint APRIL 1988)

UDC 621.867.3:621.214

0 Copyright 1974

BUREAU OF INDIAN STANDARDS

hIANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MAR0
NEW DELHI 110002

Gr 6 March 1974
 IS : 7054 - 1973

Indian Standard
SPECIFICATION FOR
CASING FOR BUCKET ELEVATORS

Conveyors, Vertical Hoists and Bucket Elevators Sectional Committee, EDC 61

Chairman Representing
* SHRIN. V. KRISHNAMURTHY Dunlop India Ltd, Calcutta

Members
SI~RIVASU IYENGAR (Alternate te
Shri N. V. Krishnamurthy)
SHRI S. BAGCHI Mining & Allied Machincly Corporation Ltd, Durgapur
SHRI C. S. RAY (Alternate)
SHRI A. B. BANERJEE Coal Board, Dhanbad
SHRI S. SINHA (Alternate)
SHRI P. K. BANERJEE Hindustan Steel Ltd, Ranchi
SHRI N. N. BI~ARGAVA .McNally-Bird Engineering Co I.td, Calcutta
SHRIM. K. V. CHARI (Alternate)
SHRI K. BHATTACHARYA Directorate General of Mines Safety, Dhanbad
SHRI N. CHAKRABORTY Ministry of Shipping & Transport
SHRI 3. RAGHAVAN (Alternate)
SHRI A. K. CHATTERJEE The Indian .\lechanization & Allied Products Ltd,
Calcutta
SHRI IQ_BALSINCH National Mineral Development Corporation Limited,
Hyderabad
SHRI B. S. K_~KKAR The Fertilizer Corporation of India Ltd, New Delhi
SHRI K. C. MEHROTRA (Alternate)
SHRI N. N. KAPUR Balmer Lawrie and Co Ltd, Calcutta
SHRI A. S. KMNKHOJE, The Associated Cement Companies Ltd, Bombay
&RI A. V. MANOHAR RAO (Alternate)
SHRI K. K. KHOSLA Meameco Ltd, Calcutta
SHRI R. K. SUBHRAMANIAM (Alternate)
SHR1V. K. KUWLANI Voltas Limited, Bombay
SHRI A. N. INWJRKAR(Ahmate)
SHRl S. v. MANI Greaves Cotton & Co Ltd, Bombay
SHRI B. N. DHEER (A&ma@)
SHRI P. RAJAC~PAL MENON Gear India (Madras) Pvt Ltd, Madras
SHRI P. M. NETYANANDAN(rllternate)
SHRI A. K. MUKHERJEE Tata-Robins-Fraser Ltd, Jamshedpur
SHRI J. B. CHANDR~ (Al&mate)
SHRI M. C. PATEL Elecon Engineering Company Ltd, Vallabh Vidyanagar
SHRI C. B. THAKORE (rll.&rnatc)
.%IRI s. G. PAUL National Rubber Manufacturers’ Ltd, Calcutta
SHRI AMITABHA SEN (dlternate)
SHR~S. G. PRADIIAN Tak Machinery Ltd, Bombay
SHRI H. A. RAMSDALE Geo Millar & Co Private Ltd, Calcutta
SHRI P. CHATTERJEE(Alternate)
SHRI B. T. RAY Indian Iron & Steel Co Ltd, Calcutta
SHRI N. N. ROY National &al Development Corporation Ltd, Ranchi
SHRI P. K. SESHADR~ Neyveli Lignite Corporation Ltd, Neyveli
DR. B. SINGH Central Mining Research Station (CSIR), Dhanbad
SHRI S. M. RAXVI, Director General, BIS (Ex-ofi& Member)
Deputy Director (Mech Engg) ’

Secretary
SHRI B. L. RAINA
Deputy Director (Me& Engg), BlS

+Shri N. V. Krishnamurthy was the Chairman for the meeting in which this standard was finalized.

( Continued on page 2 )

0 Cofiyright 1974
BUR_EAU OF INDIAN STANDARDS
Tl+ publication is protected under the Indian Copyright 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 t IO!54- 1973

( Continued from page 1 )

Bucket Elevators Subcommittee, EDC 61 : 3
Comentv Rrpnsrntins
&RI B. S. KAKKAR The Fertilizer Corporation of India Ltd, New Delhi

Members
&RI K. C. MEHROTRA (Aftcrnota to
Shri B. S. Kalckar)
SHRI N. N. BHAROAVA McNally Bii Engineering Co Ltd, Calcutta
DR. P. D. RAO (Altmnatc)
SHRI NAZAR FUTEHALLY Dynacraft Machine Co Pvt Ltd, Bombay
SHRI J. J. MISTRY (Alterna~)
Sxim V. I~ENGER Dunlop Indii Ltd, Calcutta
SHRI A. S. KHANKHOJE The Associated Cement Companies Ltd, Bombay
SHRKA. V. MANOEIAR ho (Alurmtr)
SHRI K. K. KHOSLA Meameco Ltd, Calcutta
SXIU R. K. S-M (A&ma@
SHIU A. K. MUKHERJ~E Tata-Robins-Fraser Ltd, Jamshedpur
SHRI J. B. CHANDRA (Altumat~)
SHRI B~NUBHAI I. PATEL Elecon &ginecring Company Ltd, Vallabh Vidyanagar
%XItIM.C. PATEL(Afhaf6)
 xs : 7054 - 1973

In&m Standard
SPECIFICATION FOR
CASING FOR BUCKET ELEVATORS

0. FOREWORD

0.1 This Indian Standard was adopted by the 0.3 While preparing the standard, assistance
Indian Standards Institution on 30 October 1973, has been derive2 fro% the information received
after the draft finalized by the Conveyors, Vertical from the Fertilizer Corporation of India Ltd,
Hoists and Bucket Elevators Sectional Committee Sindri.
had been approved by the Mechanical Engineering
Division Council. 0.4 For the purpose of deciding whether a parti-
cular requirement of this standard is complied
0.2 This standard pertains to casing for :
with, the final value, observed or calculated, ex-
a) centrifugal discharge bucket elevators, pressing the result of a test, shall be rounded off
b) positive discharge bucket elevators, and in accordance with IS : 2-1960*. The number
c) continuous bucket elevators. of significant places retained ii? the rounded off
The buckets are mounted on chain or belt in case value should be the same as that of the specified
of centrifugal discharge and continuous bucket value in this srandard.
elevators, however, in case of positive discharge
bucket elevators the buckets are mounted on chain. *Rules for rounding off numerical values (recked).

1. SCOPE However, in case of lined casing, thickness of

lining shall depend upon the material of the lining
1.1 This standard lays down the requirements of
and the working condition. In case of mild steel
casing for vertical bucket elevators having buckets
sheets the minimum thickness of casing shall be
mounted on chain or belt. It specifies principal
3.15 mm.
dimensions relating to different parts involved such
as hood, head section, intermediate section, dis-
charge spout and take up. This standard also 5. MANUFACTURE
deals with the general mechanical engineering 5.1 The casing shall bc either of (a) welded and
requirements. bolted construction or (b) riveted or bolted cons-
1.2 This standard does not cover the requirements truction. Intermediate section, boot section, head
for inclined bucket elevator casin’gs and is not section, hood and discharge spout are bolted
applicable to elevators handling material which together to give full length of the bucket elevator.
does not behave as a solid. However, air vent shall be provided in the hood
wherever necessary.
2. TERMINOLOGY
5.2 If required, casing may be lined with rubber,
2.1 For the purpose of this standard, the dcfini- stainless steel or aluminium sheets.
tions given in IS : 4240-19677 shall apply.
6. TAKE UP DEVICE
3. MATERIAL
6.1 Take up device shall bc provided for all bucket
3.1 The casing material shall bc as such to suit the elevators. The take up may be at head shaft or
service conditions. boot shaft as desired by the purchaser depending
upon the service conditions and layout of the plant.
4. DIMENSIONS
6.2 Take up device at the head shaft shall be of
4.1 The main dimensions for the casing for ccntri- screw type and take up at the boot shaft shall bc
fugai discharge, positive discharge and continuous either of screw type or of gravity type.
discharge bucket elevators having bucket mounted
on chain or belt shall be as given in Tables 1 to 5
read with Fig. 1 to 3. 7. INSPECTION COVER

4.1.1 Recommended thickness for the sheets 7.1 The casing for bucket elevator shall be provid-
used in fabrication of the casing for bucket elevator ed with one or more inspection covers as desired
shall be 2.00, 2.50, 3.15, 4.00, 5.00 and 6.3 mm. by the purchaser. The location of the inspection
cover shall be according to purchaser’s rcquirc-
tGlossary of conveyor terms and definitions. ment depending upon the layout of the plant.

3
 j
YC 0 F! jHAF -A INhC--
A’27

1111dimensions in inillinlctrcs.
FIG. 1 DIhlENsIoNs I'oR C:AsING FOR ~ENI'RIFUGAL DISCHARGE BUCKET ~LEVATOKS
FOR BUCKETS ON CHAINS AND/OR ON BELTS

8. CLEAN OUT DOORS IO. MARRING

8.1 The clean out doors at the boot section shall 10.1 Different sections of the casing shall be match-
be provided to remove any material from the marked to facilitate erection at the site.
bottom of the elevator for maintenance or cleaning.
10.2 The casing shall be marked with the following
9. DESIGNATION information on the name plate provided on the
bucket elevator at the suitable prominent place(s) :
9.1 The casings shall be designated by the follow-
ing : a) Manufacturer’s identification;
a) Commonly used name, b) Type and nominal size of bucket elevator;
b) Type of casing, c) Capacity of bucket elevators, t/h; and
c) Nominal size, and d) Any other information required by the
d) IS Number. purchaser.
Example : 10.3 The casings may also be marked.with the IS1
A casing of Type A and of nominal size 5 shall Certification Mark.
be designated as: IVOTE - The use of the ISI Certification Mark is governed
Casing A5 IS : 7054 by the provisions of the Indian Standards Institution

4
 --H I------G-----IL-H

All dimensions in inillinletres.

FIG. 3 DIMENSIONS FOR CARING FOR CONTIWOI.S BI:CKF.T ELEVATORS FOR HUCKETS
ON <:tlAIXS .4ND/OR ON BELTS

(Certification Marks) .4ct and the Rules and Regulations 11. PAINTING
made thereunder. The ISI Mark on products covered by
an Indian Standard conveys the assurance that they have
11.1 The casing shall be painted from outside as may
been produced to comply with the requirements of that
standard under a well-defined system of inspection, testing be agreed to between the purchaser and the supplier
and quality control which is devised and supervised by IS1
and operated by the producer. ISI marked products are 12. PACKING
also continuously checked by IS1 for conformity to that
standard as a further safeguard. Details of conditions under
which a licence for the use of the ISI Certification Maik
12.1 The casing shall bc supplied loose or in
may be granted to manufacturers or processors, may be packages as may be agreed to between the
obtained from the Indian Standards Institution. purchaser and the supplier.

6
 TABLE 1 DIMENSIONS FOR CASING FOR CENTRIFUGAL DXXHAFtGE
BUCKET ELEVATORS FOR BUCKETS ON CHAIN (TYPE A)

(Chs~ 4.1, aqd Fig. 1)

All dimensions in millimetra.

NOW
N.4L BUCKET
SIZE LENGTH* A B C D E F G H 3 x L M “V P TU R
1 150 900 280 303 280 860 140 700 loo 370 520 380 310 700 250 200 660

2 175 900 300 300 280 860 165 700 100 370 520 380 510 700 250 200 660

3 200 980 330 360 280 900 190 780 100 420 560 420 560 750 250 200 700

4 250 ! 180 380 410 310 1000 240 780 loo 470 700 480 680 800 300 200 800

5 310 I 124 43Q 460 330 1 050 300 1 040 100 530 730 510 710 850 360 200 a50

6 360 1 360 480 460 330 1200 350 1 160 100 580 770 590 780 900 400 250 95Q
ti
? 410 1 400 5.50 500 340 1 230 400 1200 100 660 790 610 800 900 425 250 980

8 460 1 400 600 500 340 1230 450 1200 100 710 790 610 800 900 425 250 980

9 510 1400 650 500 340 1 230 508 1200 loo 760 790 610 a25 900 425 250 930

10 560 1400 700 500 340 I 230 550 1200 100 810 790 610 a25 900 425 250 980

11 610: 1400 750 500 340 1 230 600 1200 100 860 790 610 850 900 425 250 980

12 610: 1 500 750 610 360 1 300 600 1 300 loo 860 a40 660 900 950 500 250 1050

13 8OOt 1400 950 500 340 1 230 780 1200 100 1060 790 610 850 900 425 250 980

14 800: I 500 950 610 360 1300 780 1300 100 1060 840 660 900 9.50 5oQ 250 1050

15 1000 1 500 1 150, 610 368 1300 980 1300 100 1260 840 660 900 950 500 250 1050

*Refer IS : 6833-1973 ‘Specification for buckrts for bucket elevators’.

tFor bucket projection ;p to and including 200 mm.
ZFor bucket projection abow 200 mm.
IS : 7054- 1973

TABLE 2 DIMENSIONS FOR CASING FOR CENTRIFUGAL DISCHARGE BUCKET ELEVATORS

FOR BUCKETS ON BELTS (TYPE B)

(C&use 4.1, and Fig. 1)

All dimensions in millimetres.

NOMINAL BUCKET
SIZP, I,ENGT~* B c D F H J N I’

1 150 400 300 280 140 100 490 700 2 50

2 175 400 300 280 140 100 490 700 2.50

3 200 400 3FO 280 190 100 490 750 250

4 250 400 410 310 240 100 490 non 300

5 310 500 4GO 330 300 100 600 n.;n 360

G 3GO 500 4GO 330 350 100 600 9nn 400

7 410 GO0 500 3-10 400 100 710 9oo 425

8 4CO 600 500 340 450 100 710 900 425

9 510 750 500 340 500 100 860 900 425

10, 5GO 7.50 500 340 550 100 8GO nno 425

11 Glot 950 500 340 600 loo I 060 WI 42.5

12 GlO$ 950 610 BGO GO0 1on 1 OGO 950 500

13 800? 1 150 500 310 780 inn i 2Gn 900 425

l-2 8OO$ 1 150 Gl0 360 780 in0 i 2cn !l:fi 500

15 1 000 1400 610 360 980 100 1 510 950 580

Dimensions A, E, G, K, L, M, R, and S shall be calculated as given below after selecting pulley diameters which will depend
on number of plies used [seeIS : 1891 (Part I) - 1968 ‘Specification for rubber conveyor and elevator belting: Part I
General purpose belting (Jirst re&ion)‘] :
A = Head pulley diameter +2 (bucket projection) +2 (belt thickness@ $2 (front clearance”).
E = D+ Tu+O.5 (boot pulley diameter) + belt thickness$+bucket projection + bottom clearance”
G = A-2H
X = 0.5 A+n where a = Head pulley diameter - boot pulley diameter
L=0.5A---a ) ’ 2
M = 0.5 ASHeight of centre of shaft from bottom of bearing housing
R= E-7-U
S= E+TU
777 shall be equal to one percent of centre-to-centre distance of shaft or 200 mm, whichever is higher.
*Refer IS : 6833-1973 ‘Specification for buckets for bucket elevators’.
tDimensions given are for bucket projection up to and including 200 mm.
SDimensions given are for bucket projection above 200 mm.
$Refer manufacturer’s catalogue.
,iFront and bottom clearances will depend upon the lump size and shall be 100 mm, Min.

8
 TABLES DIMENSi ONS FOR CASING FOR CONTINUOUS BUCKET ELEVATORS FOR BUCKJITS
ON BELT (TYPE E)

(CcmW4.1, and Fig. 3)

All dimensions in millimctres.

BUCKET
NYz BUCKET
LENGTH+
PROJECTION* B c D F H J .N P
1 150 75 400 250 870 100 100 498 650 250
2 200 125 400 350 870 150 100 490 740 250
3 250 150 400 400 1150 200 100 490 740 250
4 250 180 400 460 1150 280 100 490 840 380
5 310 180 500 460 1 150 260 100 600 840 380
6 310 200 500 500 1150 260 100 600 840 380
7 360 180 500 469 1200 310 100 600 840 380

8 360 200 500 500 1200 310 100 600 840 380

9 410 200 600 500 1200 360 100 710 840 450

10 460 280 600 380 1200 410 100 710 840 450

11 ,460 300 600 700 1250 410 100 710 900 450

12 510 250 750 600 1250 460 100 860 900 450

13 510 300 750 700 1230 460 180 860 900 450

14 610 250 950 608 1250 560 180 1060 960 450

15 610 300 950 780 1250 560 100 1060 900 450

Dimensions A, E, C, K, L, M, R, and S shall be calculated as given below after sckcting pulley dimera which will depend
1 (Part I)-1968 %Q&ica~ for rubber conveyor and ekvator belting: Part I

A = Head ‘Puuey diameter i-2 (bucket projection) +2 (bdt thickncmt) +2 (front clearance:).
E = D+lT.l+QS (boot p&y dieter) + belt thicknewt + bucket pmjcction -+ bottom clearance.,+
G = A-2H
X = 0.5 A+o whae_H=d~~t-~~~
L = 0.5 A-o > 2
M = 0.5 A+h&ht ofccntrc OhsbaRfrom the bottom ofbearlug housii.
R-E-l-U
S= M+TU

lRefa IS : 6833-1973 %ptcikatioa fbr buck& fa bucket ekaturs’.

tRefkr matmfactuter’s cambguc.
SFront and bottom Ck=UlCUWilldC+dUpOtltbClUtDprbeU8C!dSU%lrh9k1lNl~,Min.
Reprography Unit, BIS, New Delhi, India