hidrostal submersible immersible.pdf

8/14/2019 hidrostal submersible immersible.pdf

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PIONEERS IN PUMP TECHNOLOGY PIONEERS IN PUMP TECHNOLOGY PIONEERS IN PUMP TECHNOLOGY








A range of quality pumps featuring theunique Hidrostal Screw Centrifugal Impeller.Models are available for fully, partiallysubmerged or dry installation anddesigned for: SOLIDS HANDLING VISCOUS PUMPING DELICATE HANDLING

Submersible andImmersible Pumpsfor sewage & sludges


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HIDROSTAL PUMPS...

This brochure provides an overview of Hidrostals rangeof submersible and immersible pumps. The pumps aredeployed in many industries worldwide in an extensiverange of applications. Based on Hidrostals uniquescrew centrifugal impeller technology the pumps alsoincorporate many other features exclusive to Hidrostalproducts.

Detailed product selection and installation advice canbe obtained from Hidrostals Engineers, or approvedagents and distributors.

The correct selection of pump for the design of the pump station is critical to Life Cycle Costing [LCC].Hidrostals Engineers, and their approved agents and distributors, can providedetailed information on selection and installation.

A typical ywheel installation, pumping raw sewage. 4 xImmersible pumps with 175KW motors and a duty of 300l/sat 35m head per pump.

The Water & Waste Industry acknowledges that initialpurchase price of a typical pump system represents onlysome 5% of a total 15-year LCC, which includes operationand maintenance costs.

Hidrostal asserts that unseen signi cant costs canpotentially be incurred due to lost ef ciency, unscheduledmaintenance caused by full or partial blocking and not being t for purpose.

From the time Hidrostal designed the screw centrifugalimpeller, innovation has been a key company culture.

Hidrostal submersible/immersible pumps include:

Screw centrifugal impeller in all pumps

Immersible motor with dry running or submergedcapability. Oil cooling precludes issues with using pumpedliquid as coolant.

Cable entry assemblies seal motor avoiding leakage frominside or outside the cable.

Variable pump output using xed speed motor byprerotating liquids pre-pumping (see the Prerostal sectionon back page of brochure).

Two speed submersible/immersible motors Externally adjustable high chrome liners resist wear and

maintain optimum pump ef ciency. Optional ywheel in motor enclosure reduces effects of

pipeline surges which can lead to pipeline damage.

Hidrostals principles are to combine innovation with provenpump design, produce value for money products and tominimise life cycle costs (LCC).

Key design objectives are:

Provide a range of solutions for many diverse applications Provide full exibility by cross-generation compatibility.

Sub-assemblies such as hydraulic ends, bearing framesand motors can be replaced by units of later technology.

Flexibility to upgrade pump speci cations to meetchanging requirements.

All Hidrostal pumps have exceptional solids handlingcapability and operating ef ciency provided by the uniquescrew centrifugal impeller. The capability to handle sewagesludges up to 8% DSC and unscreened sewage withoutblockages makes Hidrostal pumps truly t for purpose.

Hidrostal equipment is easy to maintain. No special tools arerequired for dismantling, repair and re-assembly. Routineadjustments such as running clearances are simple.

DESIGN PHILOSOPHY

LIFE CYCLE COSTING (LCC)

INNOVATION


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UNIQUE & DEPENDABLE

The heart of all Hidrostal pumps.Extremely versatile in its applications, the impeller providesef cient handling of a range of liquids, often highly abrasiveor corrosive in nature. It is ideal for:

Solids Handling Pumping Viscous Sludges Handling Delicate or Low Shear Products

Unique to all Hidrostal pumps is the ability to handle theabove in combination.

Many applications too arduous for other types of centrifugalpumps can usually be handled by the Hidrostal screwcentrifugal impeller. The impeller comprises a single spiral

vane, with large open passages, which makes a long slowturn from the axial inlet to the radial outlet. The designprovides optimum hydraulic performance giving:

High ef ciencies Steep and stable hydraulic curve Non-overloading power curve Low NPSH Non-clog pumping

Heavy dutyconstruction

Code Pumpcasing

Impeller Liner/suctioncover

Motorcasingcover

1 Cl NI Cl Cl

2 Cl Nl HH Cl

3 Cl CM HH Cl

4 Cl HH HH Cl

5 SS SS SS SS or Cl

6 DS DS DS DS or Cl

Cl = Cast Iron NI = Nodular IronHH = Hidro Hard CM = Cr. Mo Steel SS = 316 St. Steel DS = Duplex St. Steel

PERFORMANCE

First stage:Submersible/immersible/end suction

Second stage:Immersible/end suction, horizontally or vertically mounted.

1

2

5

10

20

50

100

3 5 10 20 50 100 200 500 1000 3000

m

l/secSUB/IMMERSIBLE

Q and Mrange

K range

Use two stage pumping

[Consult Hidrostal for speci c proposals]

THE SCREWCENTRIFUGAL IMPELLER

Industrial ef uents Raw unscreened sewage

Viscous sludges Return activated sludges Drainage/Stormwater Process Waste

Typical applications:

MATERIALS

PUMP CONSTRUCTION

The standard materials of construction are grey cast ironwith a nodular iron impeller. The pump shaft is stainlesssteel. Alternative materials are available for increased wearand corrosion resistance.

The above combinations are standard build, butcomponents can be interchanged and other materials areavailable to suit speci c applications.

TWO STAGE PUMPING


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Separate cable cap permits anew cable to be tted withoutdisturbing motor cover or bearing

Upper bearing temperature probe(optional)

High ef ciency dry motor withclass F insulation with built inthermal sensors

Regreasing of bearings(certain models only)

Extensive monitoring

Tandem mechanical seals

High security cableentry assembly

Oil jacket with forcedcirculation for ef cientcooling of immersiblemotor

Heavy duty shaft andbearings

Oil circulation impellerlocked onto shaft

Finned back cover actsas heat exchanger

Heavy-duty hydraulicend incorporatingthe Hidrostal screwcentrifugal impeller.

Submersible Immersible

Also available with end-suction pumps for above ground pumping[see separate brochure]

SUBMERSIBLE / IMMERSIBLE


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Cable mechanically clamped to eliminatestrain on sealing elements.Outside of cable is sealed by acompressed grommet.Each cable conductor is isolatedfrom the motor by copper damswhich prevent moisture leakingthrough the interior of the cable inthe event of cable damage.Poured epoxy totally encapsulateseach individual conductor andcopper dam preventing moisturefrom entering the motor via theoutside or inside of the cable.

Motors are shipped with free end of

cable tted with a waterproof sleeve.

DESIGN FEATURES

1

2

3

4

1

2

3

4

23

1

1

2

3

MOTOR CABLE ENTRY

All immersible motors are ef ciently cooled by oil, containedwithin a jacket, circulated around the motor, by an impellerlocked to the motor shaft.The oil transfers the heat to the pumped liquid, through a

nned back cover between the pump and the motor.The Hidrostal cooling method has advantages over othersystems which circulate the pumped liquid through internalcooling channels which often become coated with sludgeand slime, reducing the heat transfer and effectively deratingthe motor.

COOLING

Both seals run in an oil bath which lubricates the pumpside seal faces in the event of dry running. The pump sideseal has faces of tungsten carbide running against siliconcarbide, effective for abrasive applications.For heavy-duty applications the pumpside seal springs aretotally enclosed in a rubber boot or metal body dependingon application. Motor side seals are of the open spring typewith carbon/ceramic faces.

TANDEM MECHANICAL SEALS

The lower bearing carries the axial thrust, the weight of therotating unit and substantial radial loads. To ful l its L10design life, periodic regreasing is necessary on certainmodels. This is easily done by removing a watertight coverwhich exposes a greasing nipple.The upper bearing carries a lighter load and does notrequire regreasing between major overhauls.

REGREASING OF BEARINGS

All Hidrostal motors can operate with inverters and softstarts, provided quality electrical elements of approvedspeci cation are used.

INVERTERS & SOFT STARTS

All 50hz motors are approved by ATEX for explosionproof application to 112G EExd11BT4 bzw and112GEZxd[ib]11BT4.

EXPLOSION PROOF MOTORS

Dual wound, two speed, submersible and immersible motorsare available to suit individual applications.

TWO SPEED MOTORS

Klixon type temperature sensors are built into the motorwinding. Thermistors are available as an option.

MONITORINGMOTOR TEMPERATURE

MOISTURE PROBE

Monitors the condition of the pump side seal by detectingwater ingress in the cooling/seal chamber oil.

An alarm is triggered when a signi cant amount of waterhas entered, indicating that the pump side seal should bereplaced.

Detects any water or oil passing through the motor side sealwhich could cause failure of the lower bearing. This featureis standard on larger motors and an option on smallerversions.

FLOAT SWITCH

Most Hidrostal motors have an option of monitoring bearingtemperature and on large motors thrust bearing temperaturesensors are provided as standard.

BEARING TEMPERATURES


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SUBMERSIBLES

2

3

The above mountings are themost common but many otherarrangements are possible.

TYPICALAPPLICATIONS

1

Pump mountedin steel tube withpipeline discharge.

Pump mounted insteel tube. Top oftube acts as weir.

Pump mounted inconcrete chamberwith weir discharge.

1

2

3

Non-clog performance - rags & solids handling, viscous pumping, gentle handling, low shear.

Pumps are heavy-duty construction designed to operateat depths of 30 metres, greater depths are possible withspecial designs.

AIR OR HYDRAULICALLY DRIVENOPTIONS

GUIDE RAILMOUNTED

For permanent installationand ease of maintenance,a guide rail mountingarrangement is available.Twin guide rails ensurethe pump is guided to thedischarge elbow and correctly

locates in position to give aleak free connection.

FREE-STANDINGOR PORTABLEUNITS

For applications wherea permanent guide railsystem is inappropriate, ora temporary arrangementis required, all Hidrostalsubmersible (and immersible)pumps can be used as free-standing or portable units.

For applications where the use of electric submersiblepumps is restricted by a lack of an electrical supply ora Zone 0 environment. Hidrostal can provide air orhydraulically driven portable or permanently installed units.

AXIAL FLOWTUBE MOUNTED

Hidrostal A type pumps are designedfor low head applications up to 10mand ows from 30 to 1,100l/s.The axial pump range is based aroundHidrostals classical screw centrifugalimpeller and standard range ofsubmersible motors.The difference is that the volute on thelow pressure versions is replacedwith a casing having an axialdischarge enabling the pumpsto be installed in a tube orconcrete chamber.

Screened Sewage Stormwater Returned activated sludge Ef uents Drainage water Oily water


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IMMERSIBLES

Quiet running Cool exterior No leakage of product Compact, simple installation No exposed rotating shafts

or couplings Pump easily opened for

inspection Vertical or horizontal

installation Clean odour-free waste

water pump stations

ADVANTAGES OF WET PITINSTALLATION

Hidrostal immersible pumps are a versatile, innovativedevelopment of the established submersible range.Capable of continuous operation in a dry installation,the immersibles may be operated, with equal ef ciency,when fully or partially submerged.

The pumps are particularly suited for dry pit applications

where the combination of the Screw Centrifugal Impeller andimmersible motor can be considered the state-of-the arttechnology. Leakage of the pumped product is eliminated bytandem seals running in an oil bath, avoiding a situationcommonly experienced with soft-packed glands.

Hidrostal immersible waste water / sewage pump stationshave frequently been mistaken for clean water stations, dueto the lack of odour and the cleanliness of the buildings.

Immersible pumps are particularly suitable for installationwhere quiet running, clean surroundings, reliableand long trouble-free operation is required.

ADVANTAGESOF DRY PITINSTALLATION

Immersible pumps can be installed in the same manner assubmersible pumps

Liquid level can be drawn down to pump casing withoutrisk of overheating the motor.

Shallower sumps compared with conventional submersiblepump installations.

Full motor rating maintained when pumping sludge

The pumps may be installed vertically or horizontally.


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OTHER APPLICATIONS

The Prerostal system is ideal for:

V02

VENTURI AERATORS

PACKAGED PUMPSTATIONS

Guide rail-mounted Floating

PREROCLEAN SELF CLEANINGSUMP

Hidrostal Limited, 4 & 5 The Galloway Centre, Hambridge Lane, Newbury RG14 5TL, EnglandTel: 01635 550440 | Fax: 01635 550140 | Email: [email protected]

www.hidrostal.co.ukKM080630

Standard, guide rail-mounted immersible pumps arepositioned in such a way that they draw liquid from aspecially designed basin having a tangential inlet. Thegeometry of the basin causes the liquid to rotate at thepump inlet at a rate determined by the sump level. Sinceoutput relates to the speed of the liquid rotation the pumpautomatically varies its delivery.

PREROSTAL AUTOMATIC FLOWMATCHING SYSTEM

A unique system, incorporating a Hidrostal immersiblepump, which automatically adjusts its output to matchvarying in ows, using a fxed speed motor. The systemalso has the capability of automatically skimming andpumping oating materials, oil and greases, eliminatingmaintenance and reducing odour.

Unscreened sewage (inlet pump station) Activated sludge return Industrial ef uents Skimming of oating material

A range of fully self-contained pumpstations available with single ortwin Hidrostal submersible pumps,complete with pipework, valvesand level controls. External valvechambers can be supplied as anoption.The pumps are installed in strongcorrosion resistant chambers,suitable for burial underground and

tted with access covers. Specialversions are available for mountingin dry areas such as cellars orbasements.

The Preroclean isa simpli ed versionof the Prerostal,designed to eliminatesump maintenanceand reduce odour.It combines theHidrostal screwcentrifugal impellerpump with a specialbasin arrangementto make the sumpself cleaning. Withthe special sumpgeometry installed, the pump behaves exactly like a normal

submersible pump until the sump level approaches stoplevel. At this point the sump geometry induces a strongrotating ow which entrains all oating materials includingoils and greases and pumps them into the dischargesystem. The result is that on every pump cycle all the solidsand oating material [fat, oil, etc.] is pumped out of the sumpto the screen and because there is no build up of solidsor fats in the sump, the pump does not block and is keptclean. The Preroclean is ideal for duties within ef uent andindustrial treatment processes.

V02 Venturi Aerators are driven by Hidrostal submersible

pumps, and are available as freestanding, guide rail-mounted, or oating units, (can also be supplied externallymounted if required) providing an ef cient and economicsolution for the:

Provision of oxygen for the biological treatment of pollutedef uents

Rejuvenation of oxygen depleted water Enhancement of chemical reactions Powerful mixing of tank or lagoon contents

Pump Engineers (New Zealand) LimitedUnit 1, 31 Station Rd, Penrose, Auckland, New Zealand, PO Box 12102, Penrose, Auckland 1642

Telephone: (64 9) 571 3131 Facsimile: (64 9) 571 2002 Email: [email protected]

hidrostal submersible immersible.pdf

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