Introduction

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MRH is ISO 9001:14001 certified and a leading manufacturer of textile reinforced Conveyor Belt in India for use in virtually every sector where material handing is carried out on Conveyor Belt.

We have installed latest Machinery and have fully equipped laboratory for testing Raw Materials and Finished Products. The Conveyor Belts are manufactured under supervision of experienced and qualified technical staff as per our quality plan. Our quality control team ensures strict compliance of the required specifications during each stage of production.

MRH enjoys good reputation as a reliable and dependable manufacturer of Conveyor Belt. This has been possible because of high quality standards maintained and followed at every stage of manufacturing process.

MRH is committed to meet the delivery requirements of the customers who can rely upon us for their Critical and Regular requirements to be met in the shortest possible time.

Belt Construction

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belt construction

Textile/Fabric Reinforced Conveyor Belts are generally composed of the following components:

RUBBER COVER(TOP)

It protects the carcass mainly from impact damage, wear, cut, gauge caused by the material conveyed. It also protects the strength member from effect of oil, heat, flame, chemicals etc. as the case may be.

SKIM COATING

It protects fabric layers against chaffing by separating them and also provides adequate bonding between different layers of fabric. Provides certain amount of load support and cushioning effect to impact on loading.

CARCASS

It provides the tensile strength and body necessary to move the loaded belt. The carcass is made of a rubberized fabric plies bonded together, such as, cotton-cotton, cotton-nylon, nylon- nylon and polyester-nylon fabrics

RUBBER COVER(BOTTOM)

It provides good coefficient of friction between the belt and the pulley. Also helps protect the carcass from wear and impact damage from the idlers during carriage of the material and from the material accumulated on the idlers.

BREAKER

Breaker fabric is recommended for applications involving high impact of material on the conveyor belt. It helps protect the carcass from the impact damage. Due to its weaving nature the breaker disburses impact force in different directions thereby resisting the effect of impact force at a particular point thus saving the carcass from impact damage.

belt construction belt construction

MRH Range Of Nylon-Nylon & Polyester-Nylon Belting

BELT WIDTH 200 mm To 2400 mm
NO.OF PLIES 1 TO 7
EDGE Molded/Protected Edge, Cut
BREAKER Top, Bottom, Floating, Edge
TYPE OF BREAKER Nylon, Polyester
LENGTH Standard roll length is 200 meters. However, tailor-made lengths as per specific requirements can be produced. The restriction on length over and above 200 meters is subject to transportable roll diameter and weight.
BELT THICKNESS 3mm TO 40mm
DUTY OF BELTING Type I,II and III
COVER GRADES M-24, N-17, M-25, SAR-120, SAR-90, SAR-60, OR,FR,HR/HR-T1, SHR/HRT-2, HR-T3(150°C),EPDM(220°C), Hygienic(Food Grade), OR-HR
STANDARDS FOLLOWED IS1891 (Parts I,II,III,IV&V), BS490, CAN-CSA-M422-M87-C, ISO-340, ISO4195(I&II), AS1332, DI-22102

Specially designed fabrics with suitable inter-ply/skim rubber are used to withstand impact on belts which is a common cause for belt damage. These belts are manufactured for achieving high splice strength, either hot or cold method with standard system of splicing.

Lane

Belting Technical Data

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ALL NYLON-NYLON (NN) & POLYSTER-NYLON (EP) BELTING TECTNICAL DATA

BELT DESIGNATION

MAX. RECOMMENDED WORKING TENTION(VULCANIS ED SPLICE)

NORMAL CARCASS THICKNESS

NOMINAL CARCASS WEIGHT

MIN.BELT WIDTH FOR SATISFACTORY TROUGHING (mm)

MAX.BELT WIDTH(mm) FOR SATISFACTORY LOAD SUPPORT MATERIAL DENSITY(T/M³)

NN EP NN EP
Type Rating (KN/m) mm mm (k g/m2) (k g/m2) 35° 45° Upto 1.0 Upto 1.5 Upto 2.5
TYPE - II 250/2 25 2.4 2.6 2.4 2.5 500 600 650 600 450
315/2 31.5 2.5 2.7 2.5 2.6 500 600 1000 800 650
400/2 40 2.8 3 2.5 2.7 500 600 1000 800 650
315/3 31.5 2.7 2.9 3.1 3.1 500 600 1200 1000 800
400/3 40 3 3.2 3.2 3.4 500 600 1200 1050 900
500/3 50 3.3 3.5 3.4 3.5 500 600 1400 1200 900
630/3 63 3.4 3.6 3.5 4.1 600 650 1400 1200 1050
400/3 40 3.3 3.6 4.4 4.3 500 600 1200 1050 900
500/3 55 3.8 4.2 4.5 4.8 500 600 1400 1200 900
TYPE-III 315/3 31.5 3 3.3 3.6 3.5 500 600 1200 1000 800
400/3 40 3.2 3.5 3.6 3.8 500 600 1200 1050 900
500/3 50 3.6 4.1 3.9 4 500 600 1400 1200 900
630/3 63 3.7 4.3 4 4.5 600 650 1400 1200 1050
500/4 55 4.2 4.6 5.1 5.4 500 600 1400 1200 900
630/4 70 4.7 5.4 5.3 5.6 600 650 1600 1400 1200
800/4 90 5.1 5.8 5.6 6.3 650 800 1800 1600 1400
1000/4 110 5.4 6.6 6.6 7.7 650 800 1800 1600 1400
1250/4 140 6 7.2 7.2 8.2 800 1000 2000 1800 1600
1400/4 160 6.4 7.8 7.7 9.1 1000 1200 2000 1800 1800
100/4 180 7.4 8.8 8.2 9.9 800 1050 2000 2000 2000
2000/4 220 X 11.4 X 12.4 1050 1200 2000 2000 2000
800/5 90 5.6 6.4 7.1 7.2 750 800 1800 1600 1400
1000/5 110 5.9 7 8.1 8.1 800 1000 2000 1600 1400
1250/5 140 6.4 8.1 9.9 9.9 900 1050 2000 1800 1800
1400/5 160 6.9 8.6 10.2 10.2 1000 1200 2000 1800 1800
1600/5 180 7.2 9 10.5 10.5 1000 1200 2200 2000 2000
2000/5 220 9 11.2 12.6 12.6 1050 1200 2400 2200 2000
2500/5 280 X 14 15.8 15.8 1050 1200 2400 2400 2200

Belt Cover Grades & its Application

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STANDARD & COVER GRADES

TENSILE STRENGTH (Mpa) MIN.

%ELONGATION AT BREAK(MIN.)

ABRASSION LOSS(mm³) MAX.

APPLICATION

GENERAL PURPOSE
DIN X 25 450 120 Rubber covers for general purpose of belting are specially compounded from natural rubbers of finest quality which provides the cover exceptional toughness and outstanding resistance to cut, tear, gauging & abrasion in the ultimate aggressive environment. It sis the ideal for conveying ores of all kinds, rocks, granite, quartz and other heavy sharp-edged and abrasive material whether run of mine(ROM),quarried or primary crushed.
The temperature of material being carried should not exceed 70˚C
BS M24 24 450 150
SABS M 24 450 120
AS M 24 450 125
IS M24 24 450 150
NERP SAR 24 450 120
DIN Y 20 400 150
AS A 17 400 70
DIN W 18 400 90
RMA 1 18 450 150
AS N 17 400 200
BS N17 17 400 200
IS N17 17 400 200
IS N17(S) 17 400 150
SABS N 17 400 150
RMA 2 14 400 200
HEAT RESISTANT Suitable for carrying Hot materials like Sintered , Ore, Coal, Sinter, Cement, Clinker, Dry Hot Limestone
IS T1 12.5 350 180 Suitable for material temperature Lump/Predominance of lump:125˚C(Max.) Fines (powdered materials)predominance of fines:100˚C(Max.)
IS T2 12.5 350 170 Suitable for material temperature Lump/Predominance of lump:150˚C(Max.) Fines (powdered materials)predominance of fines:125˚C(Max.)
NERP T3 12.5 400 180 Suitable for material temperature up to 150˚C
NERP SSHR 10.0 400 200 Suitable for continuous material temperature 220˚C and intermitted 300˚C
FIRE RESISTANT Fine prone materials/applications/installations necessitate use of fire resistant grade conveyor belting, fire resistant grade belts are used to carry coal, Lignite in Thermal Power stations and where there are chances of fire.
All grades of FR Belts have antistatic property and passes drum friction test as per relevant standard.
C AN-C S A-C- M422-M87(C) FR 17 350 200
IS FR 17 350 175
IS O-340 (With Cov) FR 17 350 175
DIN/NF FR 15 350 175
AS FR 14 300 175
JIS FR 14 300 175
MSHA FR 14 300 175
OIL & CHEMICAL RESISTANT Applicable for carrying fertilizers, Oil sprayed coke etc. where swelling of cover is a problem due to Oil, Fuel contamination
IS OR 12 250 180
NERP OR-HR 12 300 180 Suitable for application mentioned above with hot material as mentioned above up to 100˚C
OZONE & U-V RESISTANT Suitable for environment where high ozone concentration generates cracks on the belt surface. Belts are also having U-V Resistant cover.
AS 24 450 150

High Heat Resistant Grade (HHR)

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With our strong commitment towards R&D we have developed HHR Conveyor Belts.

The HHR Belt has been specially designed to overcome the deficiencies of Conventional H.R. . Super H.R., UHR Grade Belts, such as less belt life, crack formation in cover, Ballooning of belt etc., resulting in high belt consumptions, high inventory, uncertain & frequent change-over, high spillage etc., resulting in increase in belt costs.

SPECIAL AREAS OF APPLICATION

HHR belts avoid huge losses on account of high belt consumption, overcome un-certainties on belt/joint failure and reduce pollution by containing/stopped spillages, which are caused due to material entrapment in cracks etc.

Very hot lumpy as well as powdery material handling/conveying, e.g. clinker, sinter, burnt lime etc., where the material temp. is above 150°C, with occasional Red Hot material.

HHR is a speciality product for high heat application, hence is advised that customer should provide maximum critical information on application, enabling us to recommend suitable belt construction, if required.

Breaker fabric is recommended for applications involving high impact of material on the conveyor belt. It helps protect the carcass from the impact damage. Due to its weaving nature the breaker disburses impact force in different directions thereby resisting the effect of impact force at a particular point thus saving the carcass from impact damage.

belt construction

Salient Features of HHR

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belt construction belt construction

(High Heat Resistant) grade

  • Crack free covers
  • Elastic (Rubber cover elongation at break 400 %min.)
  • High heat resistance application
  • For continuous load 220°C
    For intermittent load
    Occasional red hot material on normal pile
    up to 300°C
  • Rugged construction
  • Special polymer compound with a unique high heat sustenance quality
  • Remarkably high bond strength under high heat flex-fatigue conditions.
  • Specially designed fabrics to take care of flex fatigue at high temp.

Minimum Pulley Diameters for the Belt Conveyors

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CARCASS THICKNESS(mm) RECOMMENDED MINIMUM PULLEY DIAMETRE(mm)
Reinforcement Material Percentage of “RMBT” used
Cotton/Cotton Nylon/Nylon Polyester/Nylon Over 60%
Up to 100%
Over 30%
Up to 60%
Up to 30%
  TYPE OF PULLEY
From To From To From To A B C A B C A B C
- 1.2 - 1.1 - 0.9 100 - - - - - - - -
1.3 1.5 1.2 1.3 1.0 1.1 125 100 - 100 - - - - -
1.6 2.0 1.4 1.7 1.2 1.7 160 125 100 125 100 - 125 100 -
2.1 2.5 1.8 2.2 1.5 1.8 200 160 125 160 125 100 125 125 100
2.6 3.1 2.3 2.7 1.9 2.3 250 200 260 200 160 125 160 160 125
3.2 3.9 2.8 3.5 2.4 2.9 315 250 200 250 200 160 200 200 60
4.0 5.0 3.6 4.4 3.0 3.7 400 315 250 315 250 200 250 250 200
5.1 6.2 4.5 5.5 3.8 4.6 500 400 315 400 315 250 315 315 250
6.3 7.8 5.6 7.0 4.7 5.8 630 500 400 500 400 315 400 400 315
7.9 10.0 7.1 8.8 5.9 7.4 800 630 500 630 500 400 500 500 400
10.1 12.5 8.9 11.1 7.5 9.2 1000 800 630 800 630 500 630 630 500
12.6 15.6 11.2 13.8 9.3 11.5 1250 1000 800 1000 800 630 800 800 630
15.7 17.5 13.9 15.5 11.6 12.9 1400 1250 1000 1250 1000 800 1000 1000 800
17.6 20.0 15.6 17.7 13.0 14.0 1600 1250 1000 1250 1000 800 1000 1000 800
- - 17.8 20.0 14.9 16.6 1800 1400 1250 1400 1250 1000 1250 1250 1000
- - - - 16.7 18.7 2000 1600 1250 1600 1250 1000 1250 1250 1000

*RMBT- Recommended Maximum Belt Tension

A. Driving pulley and pulleys exposed to high belt tension e.g. main driving pulley on the head or tail, delivery pullets under full tension, loop pulleys in the tripper, terminal head pulleys in the case of tail driving etc.

B. Snub pulleys in the return run under lower belt tension e.g. terminal tail pulleys in the case of head driving, terminal head pulleys for downhill conveying, if the terminal tail pulley is braked, snub and bend pulleys in the take-up devices.

C. Bend pulleys, for a change of direction of the belt of less than 30°

Calculation of Conveyor Belt Roll Diameter

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Conveyor Belt Roll
Conveyor Belt Roll

1. Add 0.15 meter to the calculated approx. belt roll diameter to arrive at wooden drum diameter.

2. Keeping in view the stability of drum in transit and installation, it is suggested that drum-width to drum height/diameter should be maintain within the ratio of 13.5.

Chevron Conveyor Belts

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Chevron Conveyor Belts are specially designed for the effective material handling in the applications where the angle of incline is higher (>18°) for the material to be conveyed and the the material tends to slide on a conventional conveyor belt. Chevron belts are suitable for transporting a wide range of bulk materials and also fir unit loads such as bags, bales, crates, sacks etc. Chevron achieve high conveying capacities even at inclinations of up to 40-45°.

In contrast to the profiles/cleats that are vulcanized separately on to the flat conveyor belt, the profiles/cleats on the Chevron Belt are integrally molded into the top cover of the belt during the manufacturing process. The advantage of specially designed integrally molded Chevron Belts is that the life of profile/cleat is enhanced due to low flexing/bending stress generated while negotiating around pulleys, this feature also permits the use of smaller pulley diameters.

The overlapping of the profiles/cleats assures a smooth return run and thus minimizing the damage caused, by the return idlers, to the profiles/cleats.

Incline angles achievable incline angles are dependent on the type of chevron selected and the material characteristics such as lump size, flow ability, dry/wet, shape etc.

Range Of Chevron Belts

BELT WIDTH 350 mm(14”) to 1600 mm(64”)
TYPE OF FABRIC EP(Polyester-Nylon), NN/PP(Nylon-Nylon)
PROFILE/CLEAT HEIGHT 15 mm, 25 mm, 30 mm
NO.OF PLIES 1 to 5
LENGTH Standard roll length is 100 meters. However, tailor-made lengths as per specific requirements can be produced. The restriction on the length over and above 100 meters is subjected to transportable roll diameter and weight.
DUTY OFBELTING Type I,II,III
COVER GRADES M-24, N-17, M-25, SAR-120, SAR-90, SAR-60, OR,FR, HR/HR-T1, SHR/HR-T2, HR-T3(180C), Hygienic (Food Grade), OR-HR
STANDARDS FOLLOWED IS1891 (Part I,II,III,IV,V),BS490,CAN-CSA-M422-M87-C, ISO-340, ISO4195(Part I &II), AS 1332,DIN 22102,RMA.SANS

Chevron Conveyor Belts

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Range of Chevron Belts

 Chevron Belts
Item Code BELT WIDTH (D) mm CLEAT WIDTH (B) mm CLEAT PITCH (C) mm CLEAT HEIGHT mm
NLYC 15-575 600 TO 1200 575 335 15
Chevron Belts
Item Code BELT WIDTH (D) mm CLEAT WIDTH (B) mm CLEAT PITCH (C) mm CLEAT HEIGHT mm
NLVC 15-300 350 TO 650 300 145 15
NLVC 15-385 400 TO 800 385 250 15
NLVC 15-450 500 TO 800 450 220 15
NLVC 15-600 750 TO 1000 600 250 15
NLVC 15-750 900 TO 1200 750 250 15
NLBHC 1200-1600 1000 400 25
Chevron Belt
Item Code BELT WIDTH (D) mm CLEAT WIDTH (B) mm CLEAT PITCH (C) mm CLEAT HEIGHT mm
NLBHC 25-450 500 TO 900 450 250 25
NLBHC 25-550 600 TO 1000 550 250 25
NLBHC 25-750 900 TO 1200 750 330 25
NLYHC 30-1200 1400 TO 1600 1200 330 30

Rough Top Conveyor Belts

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Rough Top Conveyor Belts

Rough Top Belts, are available with rough pattern on the carrying side of the belt, suitable for transportation at inclined angles of light weight materials and packages that may otherwise roll down easily.
The belts are manufactured, with the top surface having a rough pattern widths up to 1500 mm wide in 2 or 3 plies with different rubber cover grades. The belts can be supplied with open ends as well as in endless lengths depending on the application.

These belts are provided with cushioning and anti-slippery or anti-skid effects. Due to its coarse and soft rugged surface pattern on the top cover it gives high friction between belt and the carried load. It is suitable for transporting fragile or deform-able materials packed in bags and cartons in inclined application. These type of belts are also called as Wavy top belts.

We will solve your rough top conveyor belting challenges across applications, including package, sack, or box conveying on inclines or declines up to 35 degrees. Rough top conveyor belts cushion the load, absorbing vibrations and minimizing impacts.

Rough Top Conveyor Belts
Rough Top Conveyor Belts

Quality and Consistency

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The quality starts with the procurement of best suited raw materials(preferably from origin/source), tested for compliance with strict internal quality norms. The stringent internal specifications are strictly adhered to at each stage of pre and post production to ensure precisely engineered finished final product. Check and re-checks are common in production stage to make sure that there is no deficiency left at ant stage.

Quality Assurance bases on thorough technical knowledge of belting designs and efficient conveyor operations, the green/ raw belts are built under equal ply tensioning, proper laying of piles and uniform thickness maintained under adequate pressure so that finished product performs in a consistently reliable manner on account of straight running and uniform load bearing of reinforcement member.

A FIVE LET OFF AUTOMATED BELT BUILDING MACHINE

A very good set up that ensures belt assembly with centering of piles under controlled uniform tension. The machine is also used for precise cutting/sitting of finished goods.

A WIDE RANGE OF BELT CURING PRESSES

Of widths ranging from 500 to 2500 mm wide and in a variety of lengths provide excellent belt consolidation of optimum cure apart from giving the case and flexibility quality belts efficiently.

ADVANCED FULLY COMPUTORISED UNIVERSAL TESTING MACHINE(UTM)

It is a versatile, fully computerized testing used for thickness tensile strength (FTTS), Elongation at reference load, Elongation at break, cyclic load testing etc.

RHEOMETER (ff)

It is used to predetermine processing safely. The testing gives details of compound’s important properties such as cure speed/ time, optimum cure time, viscosity, scorch time/ performance, reversion, cross linking time etc. All uncured compounds are subjected to (100%) cemetery inspection. Only after meeting the preset values, compounds are released to production department.

ABRASION TESTING MACHINE

Abrasion/ wear resistance being one of the most critical properties of conveyor/ elevator belting is tested on this machine as per DIN 53516.

DRUM FRICTION TESTING MACHINE

The machine is used for testing the fire resistant property of conveyor belt against friction. The machine is well equipped with load cell, temperature indicators, air circulation etc. aa per national and international standards.

SURFACE ELECTRICAL RESISTIVITY TESTING MACHINE

The machine tests the electrical resistively of a conveyor belt. The test is essential to determine the anti static property of a conveyor belt.

FLAME TEST APPARATUS

The apparatus is used for testing the flame-proof property of a conveyor belt.

AGEING OVENS

Equipped with digital temperature indicators, temperature controllers and plotters.

A FULLY EQUIPPED TEST LABORATORY AND R&D WING

All tests are conducted at our fully quipped state of the art test lab. The R&D wings helps in development and improvement of rubber compounds in line with latest standard/customer requirements. Latest achievements of our R&D are SSHR and MEGAHETA cover grade of belting of high heat resistant conveyor belt applications. Cement and Steel sectors in particular are the most beneficiary of its crack free properties.

MRH Engineered Rubber Products

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Rubber Products
Works : 26- 27 Warina industrial Complex, Kapurthala Road, Jalandhar City 144013, Punjab, INDIA
Tel : +91-181-5147211, +91-181-5147212
Email : export@mahajantyre.com, info@mahajantyre.com