DAYLIFF DMS Montageanleitung

DMS

Installation &

Operating Manual

Horizontal Multistage Centrifugal Pumps

PUMP SPECIFICATIONS

MOUNTING

INSTALLATION

PUMP OPERATION

TROUBLE SHOOTING

INDEX

Contents herein are not warranted

WARRANTY

PUMP

The DAYLIFF DMS range of horizontal multistage centrifugal pumps are heavy duty

industrial quality pumps suitable for various water supply, irrigation and industrial

applications. Particular features include gland packing seals for simple and

economical maintenance and external securing tie bolts for ease of disassembly.

Construction is heavy duty cast iron stages and pump body, with cast iron impellers

and diffusers and stainless steel shaft.

A wide range of models and specifications are available, a combination of the pump

size and number of stages being selected to achieve maximum efficiency at a specific

duty point. Electric motors are selected according to the required power input at the

duty point and mounted together with the pump and coupling on a base frame. All

pumps are also suitable for direct or belt drive by diesel engine.

OPERATING CONDITIONS

Pumped liquid: Thin, clean, chemically non-aggressive liquids without abrasive

particles or fibres

Max. Fluid Temperature: +110 C

Max. Suction Pressure: 10 Bar

1. PUMP SPECIFICATIONS

Congratulations on selecting a Dayliff DMS Pump. They are

manufactured to the highest standards and if installed and operated

correctly will give many years of efcient and trouble free service.

Careful reading of this Installation Manual is therefore important,

though should there be any queries they should be referred to the

equipment supplier.

100

150

200

250

300

02 4 6 8 10 20 40 60 10080

FLOW RATE (m /hr)

PUMP HEAD (m)

12/8

12/7

12/6

12/5

25/7

25/6

25/5

46/7

46/6

46/5

85/5

85/4

85/3

STANDARD DIMENSIONS

Dimensions (mm) Inlet Flange

Pump

Size

DMS 12

DMS 25

DMS 46

DMS 85

Inlet

100

Outlet

100

STANDARD DIMENSIONS

* Power absorbed at 2900rpm

Stages DMS 12

DMS 25 DMS 46 DMS 85

Power*

(Kw)

18.5

292

316

333

370

Weight

(kg)

210 795

210 845

210 895

210 945

L2 L3 Power*

(Kw)

452

572

592

Weight

(kg)

360

425

490

555

975

1040

1105

1170

L3 Power*

(Kw)

560

576

664

Weight

(kg)

360

425

490

975

1040

1105

877

1040

1061

Power*

(Kw)

Weight

(kg)

277

351

425

906

980

1054

Shaft

210

295

345

265

330

326

170

210

250

170

210

250

150

170

210

Holes

Inlet

Inlet Outlet

Flange

DOA

4X13.5 4X17.5

Outlet Flange

AD Holes

4X17.5 8X17.5

4X17.5 8X22

50 140 110 40 150 110

65 160 130 65 185 145

80 190 150 65 185 145

100 210 170 100 235 180

Max. Delivery Pressure: 30 Bar

Rotation: Clockwise viewed from driving end

DIRECT COUPLED UNITS

CHECK FOR AXIAL ALIGNMENT AT 90 INTERVALS CHECK FOR AXIAL ALIGNMENT IN HORIZONTAL

AND VERTICAL PLANES P

2. MOUNTING

Prime Mover Selection: It is essential to ensure correct prime mover selection

as the pump unit will be inefficient if over sized and will overload if undersized. The

power absorbed at the duty point should be read from the pump curve and an

appropriately sized prime mover selected that allows for some spare power

capacity (recommended 15%) to accommodate efficiency reductions as the

installation ages. Care should also be taken to de-rate engines for altitude and

temperature.

Direct coupled units: Units should be direct coupled if possible. Mounting

frames should be rigid to prevent flexing during operation. The pump and prime

mover should be connected with a flexible coupling and great care must be taken

to ensure axial and horizontal alignment. Pump sets must be tested to check for

misalignment vibration before installation.

Belt Drive Units: Where the pump and prime mover (usually an engine) need

to rotate at different speeds pulley drive can be used. In these cases a jack shaft

mounted on plumber blocks is necessary to avoid radial loads on the pump shaft

and generally a similar arrangement should be used for the engine. Pulley sizes

should be selected to give the correct unit speeds and manufacturer's data should

be used to select a belt arrangement to prevent overloading. Correct alignment is

also important.

Provision should be made for prime mover movement for belt tensioning, which

should not be over tensioned as the additional loads will cause equipment

damage.

3. INSTALLATION

NOTE

3. INSTALLATION

Location: The pump should be installed as near as possible to the water and as a

general rule the suction lift should be minimised to ensure maximum pumping

efficiency.

Foundation: To be sufficiently substantial to

support the pump independently of piping and

provide sufficient support to eliminate

mounting bedplate distortion. For engine drive

sets the foundation should be substantial to

absorb the engine vibrations.

Pipe Supports: Piping should be supported

independently near the pump. Pipe loads on

the pump flanges must be avoided.

Suction Lift: In the case of negative suction

installations the suction lift, which should be

the sum of the vertical lift, the suction line friction losses, vapour pressure for water

above 30 C and a safety margin of 2m must always be less than the given NPSH

required by the pump at the rated flow. Refer to the pump curve for NPSH required.

Suction Pipe: The suction pipe must be absolutely airtight as even small leaks

will impair or stop pump operation. A pipe size larger than the pump connection is

recommended and tapered eccentric connectors should be used for changes in

pipe diameter. The suction line should be as short and direct as possible and sharp

turns should be avoided by using long radius bends and not elbows. When laying

the pipe line maintain a uniform gradient rising towards pump for the whole

distance. Avoid air pockets, humps or depressions in the pipe line (even if the

pump is below supply level) which may trap air and impair performance.

Ensure the end of the suction line is sufficiently below the water surface to prevent

(recommended 50 cms). The line must be free from pipe scale, welding beads or

any loose particles that could damage the pump when operating.

An effective suction installation is essential for efcient pump

operation. Most pump operating problems are due to inappropriate

suction arrangements.

4. PUMP OPERATION

Gland Packing: A gland packing must drip during normal operation to ensure

shaft lubrication. To adjust gland stud nuts should be finger tight when the pump is

first started. After start-up allow time for the packing to settle, then adjust leakage

rate by tightening the nuts one flat at a time giving time to settle with each

adjustment. The leakage rates should be about 20 drops per minute.

Lubrication: Ball bearings require no initial lubrication but should be greased

every 2000 hours of running, annually or immediately prior to operating after a

long period of idleness. Apply about two strokes from an average grease gun on

the bearing housing grease nipple, though ensure not to over grease.

Pump Starting:

On Initial start up or after maintenance.

ŸClose discharge gate valve.

ŸEliminate all air from the pump and suction pipe by priming through the

priming tee.

ŸAir trapped in the casing and impeller can be removed by rotation of pump

shaft during filling. In positive suction installations unscrewing the vent plug

facilitates priming.

ŸStart the pump and check for correct rotation (clockwise viewed from the

driving end).

ŸSlowly open discharge gate valve.

ŸCheck the gland packing is dripping correctly (see above)

ŸCheck for unusual noise or operating temperature.

Normal operation:

As for initial starting, except that the air elimination operation may not be required

if the pump is adequately primed, though discharge should always be checked for

normal flow.

Foot Valve: Unless there is a positive suction with the water surface above the

pump centerline and a free water flow into the pump, a foot valve is required with

an inlet area atleast 1 ½ times the area of the suction pipe. A strainer should have

clear area of 3 or 4 times that of the suction pipe.

Discharge Pipe: The discharge pipe should generally be at least one size larger

than the pump outlet such that friction head created is not excessive. The friction

head should be calculated to ensure that the pump is not overloaded. A gate valve

should be fitted close to the pump for maintenance purposes and for longer

pipelines where water hammer is likely

5. TROUBLE SHOOTING

PROBLEM POSSIBLE CAUSE SOLUTION

Low flow

Check all the possibilities described for no flow

Foot valve and suction piping too

small or too long

Wrong direction of rotation

Change piping

Change motor connections

No flow

Discharge head too high

Suction lift too great

Suction line and pump housing not

properly primed

Impeller, suction pipe or foot valve

clogged

Air leak in suction line

Packing worn allowing to leak into

pump

Check both the static and friction head

Check sufficient new positive suction

head available

See Pump Starting

Rectify condition

Replace packing

New Installation

Old Installation

Change suction arrangement

Check for bent shaft, loose impeller

shaft, worn bearings, pump and

motor out of alignment

Noisy

operation

Insufficient NPSH available causing

cavitation

Mechanical damage

Motor

overload

Rectify condition

Check pump curve for power

required

Reduce flow by restricting discharge

gate valve or reduce the impeller

diameter

Mechanical friction due to impeller

fouling the pump casing, bent shaft,

pump and motor out of alignment;

gland packing too tight, low voltage

Undersized motor

Flow too great due to total head being

lower than anticipated

Most bearings are capable of withstanding a moderate temperature rise above

ambient

Check for over greased bearing

housing, misaligned coupling,

drive belts misaligned or too tight

Hot bearings

If temperature is excessive

6. TERMS OF WARRANTY

ii) Standard Warranty

General Terms

If equipment failure occurs in the normal course of service having been

competently installed and when operating within its specified duty limits

warranty will be provided as follows:-

• Up to two years - The item will be replaced or repaired at no

charge.

• Over two years, less than three years - The item will be replaced or

repaired at a cost to the customer of 50% of the Davis & Shirtliff

market price.

The warranty on equipment supplied or installed by others is conditional

upon the defective unit being promptly returned free to a Davis &

Shirtliff ofce and collected thereafter when repaired. No element of site

repair is included in the warranty and any site attendance costs will be

payable in full at standard chargeout rates. Also proof of purchase including

the purchase invoice must be provided for warranty claim to be considered.

i) General Liability

• In lieu of any warranty, condition or liability implied by law, the liability of

Davis & Shirtliff (hereafter called the Company) in respect of any defect

or failure of equipment supplied is limited to making good by

replacement or repair (at the Company's discretion) defects which

under proper use appear therein and arise solely from faulty design,

materials or workmanship within a specified period. This period

commences immediately after the equipment has been delivered

to the customer and at its termination all liability ceases. Also the

warranty period will be assessed on the basis of the date that the

Company is informed of the failure.

• This warranty applies solely to equipment supplied and no claim for

consequential damages, however arising, will be entertained. Also

the warranty specifically excludes defects caused by fair wear and tear,

the effects of careless handling, lack of maintenance, faulty installation,

incompetence on the part of the equipment user, Acts of God or any

other cause beyond the Company's reasonable control. Also, any repair

or attempt at repair carried out by any other party invalidates all

warranties.

Dieses Handbuch passt für folgende Modelle

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