WOHWASlide Gates Sealed GatesShut-Off Gates

Features / Benefits•IndustrialDutyversion•HeavyDutyversion•Motorsfrom0.9to2.2kW•Motorsanddriveseasily replaceable•Boltedwear-resistantlining•Fullygalvanized•AdjustablePUsealings (Vulkollan®)•TightTransferChute•Specialwaterdrainage systems

History Over 60 years ago, the volumetric method for batching and blending freely flowing bulk materials was developed. The precise and energy saving batching and blending method that uses WOHWA slide gates replaced the industrial methods commonly used at that time. Today, more than 40,000 WOHWA discharge gates in combination with more than 2,500 WOHWA blending and weighing systems are used by WOHWA customers all over the world. Many of these systems have been operating reliably for several decades.

ProfessionalismWOHWA Slide Gates have a modular design allowing for a high degree of flexibility, easy maintenance and short delivery times. All necessary components are cut by a laser cutter, welded by a robot, hot-dip galvanized, and can be adapted to individual customer requirements.•Robustdesign(IndustrialDuty,HeavyDuty)•Maintenance-freegearmotor/bearings•Allbearingslubricatedforlife•Allpartshot-dipgalvanized

QualityAll WOHWA production and service processes have been certified as per DINISOEN9001.

High vertical integrationAll essential components of WOHWA feeding devices are manufac-tured in-house at our German plant by highly qualified employees usingthelateststate-of-the-artmanufacturingmethods(laser cutting,weldingrobots…).

WOHWASlide Gates Sealed GatesShut-Off Gates

Guaranteed and quick spare parts provisioningAll spare parts for WOHWA feeding devices can quickly and easily be delivered to every customer.

Continuous development and improvementAll WOHWA discharge devices are continually developed and improved by specially trained and experienced engineers, and adapted to new requirements and applications emerging on the market.

The principleThe bulk material quantity discharged from asiloperunitoftime(dischargecapacityinm³/hort/h)remainsconstantwithagivenopening area, with consistent and pourable bulk material, and with a material column of >1.5 m.

With crushed stone and gravel, the specific dischargecapacityis40to60t/hperdm²opening area. This hour-glass principle is the most economical production method for blending multiple aggregate gradings or for direct reclaim.

Beltfeedersorbatchingcombinations(slidegatewithbeltfeeder)arethebettersolu-tion for handling materials that do not flow readily(crushedsand,wetsand)andwhensmall blend proportions of coarse-grained materials are required.

Modular designThe modular design of all WOHWA slide gates (cutoutbylaser,weldedbyarobot,hot-dipgalvanized,andbolted)allowstoadaptthegate size individually to any outlet. There-fore, all the different WOHWA slide gates and feeding devices can be combined with each other and adapted to any application.

Drive mechanismThe robust drive rack and all drive com-ponents have been carefully selected and matched to provide reliable driving power.•0.9kWmotor(IndustrialDutyversion)•2.2kWmotor(HeavyDutyversion)•Robustwormgearboxwithbrake•Motorsandgearboxeseasilyreplaceable

AllWOHWAslidegatesorsealedgatescanbecombinedwithallWOHWAbeltfeedersandweighbeltfeeders.

Allslidegatecomponentscanbereplacedwithoutneedtoemptythestockpileorsilofirst.Individualso-lutionsfordiverseapplicationswithdifferentslidegatetypes.

Material Flow Controller

Safety Stop

Front Sealing Sliding Gate

Sealings adjustable and exchangeable

WaterDrainageSieves

DriveRack

WOHWA Slide Gates / Slide Gate with Water Drainage Type 01.1. Industrial DutySlide gate for freely flowing, coarse-grained bulk materials

Discharge opening sizesWidth from 200 to 600 mmLength from 200 to 700 mmIn100-mmsteps

Types of drive mechanism•WormGearDrive0.9kW, 230/400V,50/60Hz, IPrating:65•Opening/Closingspeedapprox. 100mm/sec•Slip-OnCrankformanually closing the gate in emergen- cies(partofthestandard scopeofsupply)•PneumaticCylinder•HandWheel/Slip-OnCrank•HaspChain

Sensors•Optionally24V/220V/110V LimitSwitchNC/NO/ contactless •Detectionofopeningwidthvia encoderwith4-20mA/0-10V analog output signal

Options•TightTransferChute•WaterDrainage•MaterialFlowController•WaterDrainageInsert Box•ReducingPlates•LimitSwitchwith Terminal Box•Encoder•ElectricHeatingElement

Groove for hand crank

Gutter with outlet

WaterDrainageSieves

Gate guide

Driverack

Worm gear drive

DriveRack

Tight Transfer ChuteThe new “tight transfer box” prevents material from spilling so that the mechanical parts of the discharge gate cannot get soiled. All parts of the discharge gate are freely accessible.

Reducing PlatesThe feed rate can be further reduced with the installation of additional, bolted reducing plates.

+ Limit Switch Rail with Terminal BoxHermetically sealed and contactless limit switches are used for transmitting the exact

gate position to the control system. The terminal box allows easy on-site connection of the slide gate to the control system.

Drive RackThe maintenance-free, self-cleaning and easily exchangeable drive rack guarantees safe closing of the gate.

Water Drainage Insert BoxThe additional insert box with stainless-steel drainage sieves can easily be mounted in the slidegate.Itincreasesandimprovesthedrain-age capacity for products with a high residual moisture content, e.g. washed sand.

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Water DrainageEasilyexchangeablestainless-steeldrainagesieves(variousgapwidthsavailablefordifferentbulkmaterials)allowtodrainthearea directly above the slide gate when it is closed, avoiding accidental ejection of mate-rial during opening.

Replacement of motor and gear box The drive unit is mounted on one of the sides(eithersidepossible)andcaneasilyand quickly be replaced.

Heating ElementAn optional heating element mounted directly below the sliding gate heats the gate and the material to guarantee gate opening at low temperatures.

Positive ClosureDuringgateclosing,coarseparticlesarepushedintothepositiveclosure(sealedwithpolyurethane)toguaranteetightclosing.

Wear-Resistant LiningBolted and easily replaceable wear-resistant linings guarantee the safe operation of the slidegate(materialno.1.8715,availablein8or20mmthickness).

Simple system integration High-resolution encoders can be used to transmit the gate’s opening position to the control system as an analog signal 4-20 mA or0-10V.

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WOHWA Slide Gates / Slide Gate with Water Drainage Type 01. Heavy DutySlide gate for freely flowing, coarse-grained bulk materials

Discharge opening sizesWidth from 400 to 1.000 mmLength from 400 to 1.000 mmIn100-mmsteps

Type of drive mechanism•WormGearDrive2.2kW, 230/400V,50/60Hz, IPrating:65•Opening/Closingspeedapprox. 100mm/sec

Sensors•Optionally24V/220V/110V LimitSwitchNC/NO/contact-less•Detectionofopeningwidthvia encoderwith4-20mA/0-10V analog output signal

Options• TightTransferChute• WaterDrainage• MaterialFlowController• WaterDrainageInsert Box• ReducingPlates• LimitSwitchwith Terminal Box• Encoder• ElectricHeatingElement

Drive RackThe maintenance-free, dirt-re-pelling and easily exchangeable drive rack with solid tube-type teeth guarantees safe closing of the gate.

Wear-Resistant LiningBolted and easily replaceable wear-resistant linings guarantee the safe operation of the slide gate(materialno.1.8715,avail-ablein8or20mmthickness).

Positive ClosureDuringgateclosing,coarsepar- ticles are pushed into the positive closure(sealedwithpolyure-thane)toguaranteetightclosing.

Drive MechanismA strong helical-bevel-geared motor(2.2kW)opensandclosesthe sliding gate safely.

Tight Transfer ChuteThe tight transfer chute prevents dust formation at the point of transfer to the collecting conveyor belt. All limit switches and sealings are accessible via assembly openings.

Reducing PlatesThe feed rate can be further reduced with the installation of additional, bolted reducing plates.

Limit Switch with Terminal BoxHermetically sealed and contact-less limit switches are used for transmitting the exact gate posi-tion to the control system. The terminal box allows easy on-site connection of the slide gate to the control system.

Water DrainageEasilyexchangeablestainless-steeldrainagesieves(variousgap widths available for different bulkmaterials)allowtodrainthe area directly above the slide gate when it is closed, avoiding accidental ejection of material during opening.

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WOHWA Double-Flange Sealed Gate Type 08. Industrial DutySlide gate for freely flowing, fine-grained bulk materials (max.particlesize3mm).

Discharge opening sizesWidth from 200 to 500 mmLength from 200 to 600 mmIn100-mmsteps

Types of drive mechanism•WormGearDrive0.9kW, 230/400V,50/60Hz, IPrating:65•Opening/Closingspeedapprox. 100mm/sec•Slip-OnCrankforclosingthe gateinemergencies(partof thestandardscopeofsupply)•Pneumaticcylinder•HandWheel•HaspChain

Sensors•Optionally24V/220V/110V LimitSwitchNC/NO/contact- less•Detectionofopeningwidthvia encoderwith4-20mA/0-10V analog output signal

Options•WaterDrainageInsertBox•LimitSwitchwithTerminal Box•Encoder

Water Drainage Box An additional water drainage box, mounted directly above the slidegate08.,allowstodrainvery fine materials with a high degree of residual moisture content. Stainless-steel drainage sieves(variousgapwidthsavail-ablefordifferentbulkmaterials)are mounted in the drainage box and allow to drain the area directly above the slide gate when it is closed, avoiding acci-dental ejection of material during opening. For controlled water drainage, the box has outlets to locally provided piping.

+ SealingsThe sliding gate runs in sealings that are adjustable from the ex-terior and safely tighten the gate.

Easy replacement of rollers The rollers on which the gate slides can easily and quickly be replaced from the exterior.

Emergency shut-offSlip-On Crank for closing the gate in emergencies.

Limit Switch with Terminal BoxHermetically sealed and contact-less limit switches are used for transmitting the exact gate posi-tion to the control system. The terminal box allows easy on-site connection of the slide gate to the control system.

Drive RackThe maintenance-free, self-cleaning and easily exchange-able drive rack guarantees safe closing of the gate.

Additional drive mechanismPneumaticcylinder

Replacement of motor and gear box The drive unit can easily and quickly be replaced.

Simple system integration High-resolution encoders can be used to transmit the gate’s opening position to the control system as an analog signal 4-20 mA or0-10V.

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Discharge opening sizesWidth from 200 to 500 mmLength from 200 to 500 mmIn100-mmsteps

Types of drive mechanism•WormGearDrive0.9kW, 230/400V,50/60Hz, IPrating:65•Opening/Closingspeedapprox. 100mm/sec•Slip-OnCrankforclosingthe gateinemergencies(partof thestandardscopeofsupply)•HandWheel/Slip-OnCrank•HaspChain

Sensors•Optionally24V/220V/110V LimitSwitchNC/NO/contact- less •Detectionofopeningwidthvia encoderwith4-20mA/0-10V analog output signal

Options•LimitSwitchwithTerminal Box•Encoder

Double Flange Sealed Gate Type 03.Slide gate for fine-grained and dustlike bulk materials (max.particlesize3mm,notcompletelydust-tight).

WOHWA Slide Gates

WÖHWAWaagenbauGmbH ÖhringerStr.6·74629Pfedelbach·GERMANYPhone+4979419131-0·Fax+4979419131-28info@woehwa.com · www.woehwa.com

Double-Flange Shut-Off Gate Type 02.

Emergency Shut-Off Gate Type 99.

Emergency Shut-Off Gate Type 09.

Pin Gate Type 089.

Simple manual and emergen-cy double-flange shut-off gate with hand wheel or slip-on crank.

Robustemergencyshut-offgate for repair purposes, operated via hand-wheel and shaft, painted, optionally hot-dip galvanized.

Simpleshut-offgate(push-pullslidegate)forrepairpurposes, painted, optionally hot-dip galvanized.

Emergencyshut-offgateforcoarse-grained materials (push-pullslidegate).