Bucket Elevators - Technical Expressions
Bucket Elevators - Technical Expressions
Bucket Elevators - Technical Expressions
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SPECIFICATION<br />
POTASH: COMPACTOR EXPANSION SECTION: 41 12 16<br />
BUCKET ELEVATORS<br />
EQUIPMENT SPECIFICATION<br />
ENQUIRY NUMBER: REV. A, PAGE: 3 OF 10<br />
4.3.7 Chain links shall be made of high tensile drop forged<br />
nickel alloy steel with case hardened chrome alloy steel<br />
pins.<br />
4.3.8 The Vendor shall confirm material selection where<br />
specified. Otherwise the Vendor shall specify materials of<br />
construction with corrosion and erosion allowances.<br />
4.4 Specific Equipment Requirements<br />
4.4.1 General<br />
4.4.1.1 Vendor shall propose units with as many common components<br />
as possible.<br />
4.4.1.2 <strong>Bucket</strong> elevators shall be continuous discharge, double<br />
chain bucket type and shall be manufacturer’s standard size<br />
and design, modified only as required and suitable for duty<br />
specified.<br />
4.4.1.3 For each bucket elevator, Vendor shall advise price<br />
adder/discount schedule for increasing/reducing the height<br />
of the bucket elevator (+/- 0 to 20%). Price<br />
adder/discount shall account for all changes required to<br />
extend/reduce the height of the elevator. This includes<br />
but is not limited to; drive, power train sizing, shafts,<br />
bearings, chain, casing, etc. This data will be used to<br />
finalize pricing of the units before issuing the Purchase<br />
Order, as layouts are still in development.<br />
4.4.1.4 <strong>Bucket</strong> elevators shall be designed with a bucket filling<br />
rate of 60% by volume at normal operating flow rate and<br />
using the minimum density of material. Elevator power<br />
calculation shall be based on buckets filled to 100% of the<br />
theoretical capacity with maximum density material allowing<br />
adequate provision for digging load.<br />
4.4.1.5 Casing design shall be dust-tight and weatherproof. Dusttight<br />
inspection and repair doors shall be provided as<br />
required for proper inspection and maintenance. A vent<br />
connection flange (6” standard pipe flange) for dedusting<br />
purposes shall be provided at the head and boot sections.<br />
4.4.1.6 The elevator casing shall be fabricated of steel plate,<br />
adequately braced and stiffened so as to be completely<br />
self-supporting. Minimum thickness shall be 6 mm.<br />
4.4.1.7 The bucket elevators shall be provided with a counterweight<br />
– type chain tensioning device, complete with weights.<br />
4.4.1.8 Elevator shall be capable of starting from a full load<br />
condition, including digging factor.<br />
PTMFOG0000000184.Doc<br />
©Hatch 2004/12
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