V&a Richter rmi-b series User manual

INSTALLATION AND OPERATING MANUAL

Translation of the original manual

Keep for future use!

This operating manual must be strictly observed before

transport, installation, operation and maintenance

Subject to change without notice.

Reproduction is generally permitted with indication of the source.

9430-055-en Revision 00 Edition 03/2018

Series RMI-B

Sealless Chemical Magnetic

Drive Pump

Close-coupled design

Series RMI-B close-coupled design Page 2

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List of Contents

List of Contents ............................................... 2

Relevant documents ....................................... 3

1 Technical data ........................................... 3

1.1 Tightening torques ....................................... 4

1.2 Type plate, dry-running, ATEX and housing

markings ...................................................... 4

1.3 Spare parts .................................................. 4

2 Safety ......................................................... 5

2.1 Intended use ................................................ 5

2.2 Notes on safety for the customer / operator 6

2.3 Notes on safety for maintenance ................. 6

2.4 Conversion work and production of spare

parts by the customer .................................. 6

2.5 Improper operation ...................................... 6

2.6 Special requirements for explosion protection

................................................................. 6

2.6.1 Filling the unit .................................................. 7

2.6.2 Special operating conditions ........................... 7

2.6.3 Chargeable liquids .......................................... 7

2.6.4 Identification .................................................... 7

2.6.5 Check of the direction of rotation ..................... 7

2.6.6 Mode of operation of the pump ....................... 7

2.6.7 Temperature limits .......................................... 8

2.6.8 Maintenance ................................................... 8

2.6.9 Electric peripheral equipment .......................... 8

3 Transport, storage and disposal .............. 9

3.1 Return consignments ................................... 9

3.2 Disposal ....................................................... 9

4 Product description ................................. 10

5 Installation ............................................... 11

5.1 Safety regulations ...................................... 11

5.2 Installation of pump/unit ............................. 11

5.3 Alignment of pump - motor ........................ 11

5.4 Piping ......................................................... 11

5.4.1 Nominal size ................................................. 11

5.4.2 Nozzle loads ................................................. 12

5.4.3 Suction line ................................................... 12

5.4.4 Supply lines .................................................. 12

5.4.5 Discharge line ............................................... 12

5.4.6 Venting and evacuating ................................. 12

5.5 Pipe fittings ................................................ 12

5.6 Monitoring facilities .................................... 13

5.7 Drive .......................................................... 13

5.8 Electric connection .................................... 13

6 Commissioning / Shutdown ................... 14

6.1 Initial commissioning ................................. 14

6.1.1 Filling the pump housing ............................... 14

6.1.2 Start-up ......................................................... 14

6.2 Operating limits ......................................... 14

6.2.1 Abrasive media ............................................. 14

6.2.2 Min./max. flow rate ........................................ 14

6.3 Shutdown .................................................. 15

6.4 Restarting .................................................. 15

6.5 Improper operations and their consequences

(examples) ................................................. 15

7 Maintenance ............................................. 16

7.1 Safety related screw connections ............. 16

7.2 Motor ......................................................... 16

7.3 Cleaning .................................................... 16

7.4 Stand-by pumps ........................................ 16

7.5 Notes on dismantling ................................. 16

7.5.1 Protective clothing ......................................... 16

7.5.2 Magnetic fields .............................................. 16

7.5.3 Changing the motor ....................................... 16

7.6 Dismantling ................................................ 17

7.6.1 Removing adapter ........................................ 17

7.6.2 Dismantling motor, adapter and drive magnet

assembly ....................................................... 17

7.6.3 Dismantling the slide-in unit ........................... 17

7.6.4 Dismantling housing/shaft spider ................... 18

7.7 Notes on assembly .................................... 18

7.7.1 Table for target dimension Z .......................... 19

7.8 Assembly ................................................... 20

7.8.1 Assembly of housing / shaft spider ................ 20

7.8.2 Assembly of slide-in unit ................................ 20

7.8.3 Assembly of drive unit ................................... 20

7.8.4 Final assembly .............................................. 21

7.9 Tests .......................................................... 21

8 Malfunctions ............................................ 22

9 Sectional drawing .................................... 23

9.1 Legend ...................................................... 23

9.2 RMI-B in close-coupled design ................ 24

10 Assembly aids ......................................... 25

10.1 Boring templates ....................................... 25

10.2 Pull-off device for plain bearing bushes .... 25

10.3 Dismounting device impeller - rotor ........... 25

Series RMI-B close-coupled design Page 3

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Relevant documents

♦ Data sheet

♦ Works certificate

♦ Sectional drawing

RMI-B close-coupled design 9430-00-3002

♦ Installation drawing

♦ Performance curves

♦ Spare parts list

♦ Operating manual and declaration of conformity

motor

Appendix to the operating manual:

♦ Operational limits 9430-00-3030

♦ Declaration of conformity with ATEX

♦ Declaration of conformity without ATEX

♦ Form for Safety Information Concerning the Con-

tamination QM 0912-16-2001_en

On request :

♦ Magnetic drive data Richter TIS 0543-03-0001

♦ Nozzle forces Richter TIS 0541-02-0006

♦ Publication: "Centrifugal Pump Operation without

NPSH Problems"

♦ Publication "Safe Operation of Magnetic Drive

Pumps“

1 Technical data

Manufacturer :

Richter Chemie-Technik GmbH

Otto-Schott-Str. 2

D-47906 Kempen

Telephone: +49 (0) 2152 146-0

Fax: +49 (0) 2152 146-190

E-Mail: richter-info@idexcorp.com

Internet:

Richter EP (Nanjing) Co., LTd.

No. 18 Ailing Rd., Moling,

Jiangning Dev. Zone

211111 Nanjing

P.R. China

Telephone: +86 (0) 25 5275-1718

Fax: +86 (0) 25 / 5275 1747

E-Mail: j[email protected]om

Internet:

Authorised person acc. to machinery directive

2006/42/EG: Gregor Kleining

Designation :

Single-stage, plastic-lined, magnetic drive chemical

centrifugal pump, series RMI-B, close-coupled design

Horizontal design, sealless, free of eddy currents

Technical specifications DIN EN ISO 15783 and DIN

EN ISO 5199 .

Connecting dimensions to ISO 2858 / DIN EN 22858

Flange connecting dimensions: DIN EN 1092-2, type

B (ISO 7005-2, type B) PN 16 and PN 20 (Class 150)

ATEX Directive 2014/34/EU

Machine Directive 2006/42/EC

Materials :

Pressurized parts:

Ductile cast iron ASTM A 395 / EN-JS 1049

Wetted parts:

PFA, PTFE, SSiC

and see data sheet.

Flow rate : up to 120 m3/h (at 2900 min-1)

up to 130 m3/h (at 3500 min-1)

Delivery head : up to 70 m LC (at 2900/min-1)

up to 100 m LC (at 3500 min-1)

Housing discharge pressure:

max. 16 bar, (12 bar at –10 °C down to –30 °C)

optional 20 bar (16 bar at –10 °C down to –30 °C)

Temperature range : -30 °C to 150 °C

Temperature classes as per ATEX :

see Section 2.6.7.

Admissible ambient conditions for pumps acc. to

directive 2014/34/EU (ATEX) :

Ambient temperature range: – 20 °C to + 40 °C

(higher temperature after consulting the manufacturer)

Ambient pressure range: 0,8 barabs to 1,1 barabs

Noise capacity level : LWA = ≤ 70 dB

acc. to DIN EN ISO 9614-2

Sizes :

Group 1.1 Group 1.2 Group 1.3

40-25-125

40-25-160

50-32-200

50-32-125

50-32-160

65-40-200

80-50-160

80-50-200

80-65-160

Weight : See data sheet

Dimensions : See installation drawing

Series RMI-B close-coupled design Page 4

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1.1 Tightening torques

Screws greased, tighten in diametrically opposite se-

quence

Housing screws 901/3

Size

No. x size

Tightening torque

PN 16

PN20

[mm]

[DIN/ISO]

[Nm]

40-25-125

8 x M12

50-32-125

8 x M12

40-25-160

8 x M12

50-32-160

8 x M12

80-50-160

8 x M12

80-65-160

8 x M12

50-32-200

12 x M12

65-40-200

12 x M12

80-50-200

12 x M12

Pipe screws, flanges to DIN/ISO

No. x size

Tightening torque

PN 16

PN20

PN 16

PN20

[mm]

[DIN/ISO]

[Nm]

4 x M12

4 x M14

4 x M16

4 x M14

4 x M16

4 x M14

4 x M16

8 x M16

4 x M16

1.2 Type plate, dry-running, ATEX

and housing markings

The stainless steel type plate is undetachably riveted

to the adapter.

If the operator attaches his identification, it must be

ensured that the pump matches the application in

question.

Example of type plate:

Dry-running:

ATEX marking:

Housing identification:

The following are visible on the housing according to

DIN EN 19:

♦ Flange nom. size

♦ Rated pressure

♦ Body material

♦ Manufacturer's identification

♦ Melt number/Foundry identification

♦ Foundry date

1.3 Spare parts

Spare parts for two years of continuous operation in

accordance with DIN 24296 and in consultation with

the manufacturer.

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2 Safety

This operating manual contains fundamental

information which is to be observed during installation,

operation and maintenance.

It must be read before installation and

commissioning!

This operating manual must always be available at the

place of use of the machine/plant.

Observe the safety notes in all the chapters.

Installation, operation and maintenance are to be per-

formed by qualified staff.

The area of responsibility, authority and supervision of

the staff must be exactly regulated by the customer.

If the staff does not have the necessary expertise,

they are to be trained and instructed.

If necessary, this can be provided by the manufactur-

er/supplier on behalf of the machine operator.

General hazard symbol! People may be

put at risk.

Safety symbol! The pump and its function

may be put at risk if this safety symbol is not

observed.

EU marking! Explosion-protected equip-

ment must be identified for work in poten-

tially explosive areas.

Warning of a magnetic field!

Warning of electric power!

This warning sign must be used if people

with a pacemaker are at risk, e.g. from a

strong magnetic field.

It is imperative to observe signs attached directly to

the pump / unit, e.g.:

♦ Direction of rotation arrow

♦ Warning against dry-running

♦ Type plate

and they are to be kept legible.

Non-observance of the notes on safety may result

in the loss of any and all claims for damages.

Non-observance may involve the following hazards:

♦ Failure of important functions of the machine/plant.

♦ Failure of electronic equipment and measuring

instruments due to magnetic fields.

♦ Risk to people and their personal property from

magnetic fields.

♦ Risk to people from electric, mechanical and chem-

ical effects.

♦ Risks to the environment through leaks of hazard-

ous substances.

If the unit is used in potentially explosive

areas, special attention is to be paid to

the sections identified with “Ex” in this

operating manual.

2.1 Intended use

Richter pumps of the series RMI-B are plastic-lined

magnetic drive centrifugal pumps for the leak-free

conveyance of aggressive, toxic, pure and inflamma-

ble liquids. The pump is equipped with a permanent

magnetic synchronous drive.

♦ Only operate the pump / the unit in a technically

perfect condition.

♦ Only use the pump with the media described in the

data sheet.

♦ For vertical installation of the pump, please consult

the manufacturer.

The observance of the specified physical limits is im-

portant for perfect functioning and safe operation,

especially with regard to explosion protection to pre-

vent potential sources of ignition (see Section 2.6):

♦ Avoid dry running

♦ Ensure that the pump is commissioned only with

the pumped medium and is not operated without.

♦ For safe pump operation, we recommend a flow

rate between 0.3 and 1.1 Qopt. The maximum op-

erating temperature must never be exceeded. See

Section 2.6.7. In case of doubt, you must consult

the manufacturer.

♦ The manufacturer must be consulted in the event

of entrainment of gas >2% as well as solids in or-

der to avoid a lack of lubrication and dry-running.

♦ The plant NPSH value (NPSHA) should be 0.5 m

higher than the NPSH value of the pump

(NPSHR). See also Section 5.4.1.

Inadmissible modes of operation, even for

brief periods, may result in serious damage

to the unit.

In connection with explosion protection, potential

sources of ignition (overheating, electrostatic and in-

duced charges, mechanical and electric sparks) may

result from these inadmissible modes of operation;

their occurrence can only be prevented by adhering to

the intended use.

Series RMI-B close-coupled design Page 6

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Furthermore, reference is made in this connection to

the Directive 95/C332/06 (ATEX 118a) which contains

the minimum regulations for improving the

occupational health and safety of the workers who

may be at risk from an explosive atmosphere.

Do not operate the unit above the values

specified in the data sheet for the

♦ fluid

♦ flow rate

♦ speed

♦ density

♦ Head

♦ operating temperature and

♦ motor rating

Observe the instructions contained in the

operating manual or contractual documentation; if

necessary, consult the manufacturer.

All important features are documented in the data

sheet included in the scope of delivery.

In the event of operating conditions other than those

described in the data sheet, the following are to be

checked again:

♦ design of the pump

♦ design of the accessories

♦ resistance of the materials.

2.2 Notes on safety for the cus-

tomer / operator

The following must be observed:

♦ The notes on safety contained in this operating

manual,

♦ the prevailing regulations on accident prevention,

♦ in-house work, operating and safety regulations of

the customer.

♦ Protect hot, cold or moving machine parts from

being touched on site.

♦ Do not remove any protective facilities when the

machine is in operation.

♦ Exclude any risks from electricity.

♦ Remove leaks of hazardous media (e.g. explosive,

toxic, hot) so that there is no risk to people and the

environment. Observe statutory regulations.

♦ Provide and use protective equipment for the staff.

Caution when using the units in potentially

explosive area!

Prevent inadmissible modes of operation.

2.3 Notes on safety for mainte-

nance

♦ Strictly, work on the pump/unit may only be per-

formed when it is at a standstill.

♦ The pump housing must have reached ambient

temperature.

♦ The pump housing must be depressurized and

drained.

♦ It is imperative to observe the procedure for stop-

ping the machine described in this operating man-

ual. See also Section 6.3.

♦ Decontaminate pumps which convey media haz-

ardous to health.

♦ Immediately after completion of the work, re-install

all safety and protective facilities or put them into

operation again.

♦ When installed, the magnetic drives do not repre-

sent any risk of environmental impact if the notes

on safety are observed (see also Sections 5.1 and

7.5.2).

It is imperative to observe the notes on

safety in Section 7.5.2

during dismantling

and assembly as well as during transport

and storage of magnetic drives as single

components.

♦ Observe the points listed in Section 6.1 prior to

recommissioning.

2.4 Conversion work and produc-

tion of spare parts by the cus-

tomer

♦ Conversion of or changes to the machine are only

admissible after consultation with the manufactur-

er.

♦ Only use original spare parts or parts approved by

the manufacturer.

♦ The use of other parts may annul the liability for

any resultant consequences.

2.5 Improper operation

♦ The operational safety of the machine supplied is

only guaranteed if it is used properly in accordance

with Section 2.1 of this operating manual.

♦ The operating limits specified in the data sheet

must under no circumstances be exceeded.

2.6 Special requirements for ex-

plosion protection

If the units are used in potentially explosive areas, the

measures and notes in Sections 2.6.1 to 2.6.9 are

imperative to guarantee the explosion protection.

Series RMI-B close-coupled design Page 7

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2.6.1 Filling the unit

During pump operation the wetted interior of

the pump must always be filled with the liquid

medium.

This prevents any explosive atmosphere and the risk

of dry-running.

If the customer cannot ensure this, we rec-

ommend that appropriate monitoring facilities

be provided.

Also carefully fill auxiliary,

heating and

cooling systems.

2.6.2 Special operating conditions

In the standard design the can chamber and

the plain bearings are cooled and lubricated

by a flushing flow.

Owing to properties of the medium (e.g. sticking due

to inadmissible solids entrainment, clogging, gas en-

trainment etc.) the cooling flow can be interrupted

and, as a result, an inadmissible temperature rise may

occur. Provide appropriate monitoring facilities. See

Section 5.6.

For safe pump operation, we recommend a flow rate

of 0.3 to 1.1 Qopt. If the pump is operated outside this

range, it must be ensured that the max. admissible

flow rate according to the pump characteristic curve is

not exceeded and that the max. admissible operating

temperature according to Section 2.6.7 is observed.

If the flow rate is too high, the differential pressure

upstream and downstream of the plain bearings could

fall so much that a lack of lubrication or dry-running

may occur.

If the flow rate is too low, the medium may heat up so

much owing to the fluid friction that the max.

admissible surface temperature of the relevant

temperature class is exceeded.

Overloading, overheating, non-observance of the

design data or the incorrect selection of the magnetic

drive can lead to the decoupling of the inner and outer

magnet assemblies. As a result, eddy currents may be

induced on the inner and outer magnet assemblies

and an inadmissible temperature rise may occur.

The situation is to be remedied by providing appropri-

ate monitoring facilities. See Section 5.6.

The plant NPSH value (NPSHA) should be minimum

0.5 m higher than the NPSH value of the pump

(NPSHR) to prevent a lack of lubrication or dry-

running of the plain bearings.

2.6.3 Chargeable liquids

For operation with chargeable liquids with a

conductivity < 10-8 S/m inert gas must be used for

flushing during drain. See also Section 6.3.

2.6.4 Identification

The ex identification on the pump relates to

the pump section. A separate declaration of

conformity must be provided for the shaft

coupling and motor and for other attach-

ments as well as corresponding identifica-

tion.

Example of the identification of the pump section:

II2GD IIC TX X.

For assembling the pump with components which are

not explosion-protected (e.g. motor, shaft coupling), it

is recommended to mask or remove the "potentially

explosive" identification from the pump component

and, if necessary, from other accessories.

In this case the declaration of conformity applies with-

out ATEX identification.

At surface temperatures which depend primarily on

operating conditions, DIN EN 13463-1 Chapter 9.3

allows no temperature class or temperature to be indi-

cated.

The temperature class must be determined by the

operator in accordance with Section 2.6.7 “Tempera-

ture Limits”.

2.6.5 Check of the direction of rotation

If there is also a risk of explosion during the

installation phase, the check of the direction

of rotation must under no circumstances be

conducted by briefly switching on the unfilled

pump in order to prevent an inadmissible rise

in temperature at the plain bearings.

We recommend you to only perform a check of the

direction of rotation with with filled pump and with a

rotating field instrument. See also Section 6.1.2.

2.6.6 Mode of operation of the pump

The pump may only be started with the suction side

shut-off element fully opened and the discharge side

shut-off element slightly opened. Start-up against a

closed check valve is also possible. The discharge

side shut-off element is to be regulated to the

operating design point directly after run-up.

See also Section 5.4.1.

Operation with closed shut-off elements in the

suction and/or discharge lines is not permitted!

There is a risk that even after a short time

high surface temperatures on the pump

housing may occur owing to rapid heating of

the liquid in the pump interior.

A rapid rise in the pressure inside the pump

involves the risk of overloading to the point

of bursting.

The pump must not be in operation in the

unfilled or partially filled state (dry run-

ning). This results in serious damage to

the pump and additional risks to the envi-

ronment can arise.

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Dry-running cannot only occur with an insuf-

ficiently filled interior but also in the event of

high gas contents in the liquid medium.

Operation of the pump outside the admissible

operating range may also lead to dry-running (e.g.

due to evaporation in the interior).

2.6.7 Temperature limits

In the normal operating condition the highest

temperatures are to be expected on the sur-

face of the pump housing.

In the case of media >40° C the surface temperature

of the pump housing is generally lower than the tem-

perature of the medium as the plastic lining acts as

insulation.

If the pump is heated (e.g. heating jacket), it

must be ensured that the temperature clas-

ses prescribed in the annex are observed.

The not heated pump surface must have free contact

with the environment.

When operating the pump, make sure that

an excessive deposit of dust is avoided (pos-

sibly regular cleaning). This prevents the

pump surface from heating to above the ad-

missible temperature.

The plant customer must ensure that the

prescribed operating temperature is observed.

The maximum admissible temperature of the

liquid medium at the pump inlet depends on the

temperature class and the selected lining material

required in each case.

The following always applies: No inadmissible tem-

peratures may be introduced into the motor and the

specifications of the motor manufacturer and

VDMA/TVEI 24263 must be observed.

The temperature limits of the fluid given in Table 2

only apply when motors are used where the motor

manufacturer permits at least the following surface

temperatures for the motor flange and motor shaft:

Table 1

Temperature

class

Motor flange Motor shaft

70 °C

80 °C

75 °C

85 °C

75 °C

85 °C

75 °C

85 °C

75 °C

85 °C

Observe the data given by the engine manufacturers

or the VDMA / ZVEI 24263 about impermissible

ambient temperatures. The absence of this

information is to be expected to be at most 40 ° C.

Table 2 below indicates the admissible medium tem-

perature, depending on the pump design, as a func-

tion of the temperature class in accordance with EN

13463-1.

Table 2

Temperature class

acc. to EN 13463-1

Limit value of the tem-

perature of the liquid

PFA

85 °C

75 °C

100 °C

90 °C

135 °C

125 °C

T3 200 °C

150 °C

T2 300 °C

150 °C

T1 450 °C

150 °C

1) The limit values specified for the temperature of the medium at

the pump inlet are determined for the most unfavourable case

(high speed, low flow, low heat capacity of the medium, ....).

Under favourable operating conditions the limit values specified

may be increased by up to 5 K after consultation with the manu-

facturer.

For engines with the type of protection "increased

safety", only low surface temperatures are permitted

on the motor shaft or on the motor flange.

In these cases the max. permissible medium tempera-

ture is 20 K above the permissible surface tempera-

ture at the interfaces to the motor.

e. g.: max. motor shaft temperature: 60°C

max. motor flange temperature: 65°C

This results in a permissible medium temperature

for the pump of 80 °C (60 °C + 20K).

No information on the permissible ambient

temperature is to be assumed for a maximum of 40 °

2.6.8 Maintenance

To achieve safe and reliable operation, it

must be ensured in inspections at regular

intervals that the unit is properly serviced and

kept in technically perfect order.

In regard to media containing solids, the maintenance

intervals must be set by the operator in accordance

with the conditions of operation.

If auxiliary systems (e.g. cooling, heating) are

installed, check to see whether monitoring facilities

are required to ensure their function.

2.6.9 Electric peripheral equipment

Electric peripheral equipment, e.g. pressure,

temperature and flow sensors etc. must

comply with the prevailing safety require-

ments and explosion protection provisions.

Regular checks of the motor bearings in accordance

with the operating manual of the motor manufacturer.

Observe ATEX notes.

Series RMI-B close-coupled design Page 9

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3 Transport, storage and disposal

The pump or the unit must be transported

properly. It must be ensured that during

transport the pump/unit remains in the hori-

zontal position and does not slip out of the

transport suspension points.

A pump or motor can be suspended from the ring bolt

provided for this purpose.

The suspension points are not suitable for transport-

ing a complete unit, i.e. pump with base plate and

motor.

In this case, the slinging points for the ropes on the

base plate are to be used. See Fig. 1.

exception:

The base plate 270 x 500 mm for pumps in group 1

does not have any rope stops. In this case, the unit

(pump, motor and base plate) is suspended from the

crane eyelets of pump and motor.

The slinging ropes must not be attached to free shaft

ends.

Fig. 1

Directly after receipt of the goods, check the con-

signment for completeness and any in-transit

damage.

Damaged pumps must not be installed in the plant.

When unpacking magnetic drives as single

parts, the relevant notes in Section 7.5.2

must be observed.

Handle goods carefully to prevent damage.

Flange covers serve as protection during transport

and must not be removed.

If the unit is not installed immediately after delivery,

store them properly.

The pumps be stored in a dry, vibration-free and well-

ventilated room at as constant a temperature as pos-

sible.

Protect elastomers against UV light.

Generally, a storage period of 10 years do not

exceeded. An admissible storage period of 4 years

applies to elastomers made of NBR.

If magneti

c drives are stored as single

parts, the relevant notes in Section 7.5.2

are to be observed.

In the case of prolonged storage conservation agents

on machined component surfaces and packing with a

desiccant may be necessary.

3.1 Return consignments

Pumps which have conveyed aggressive or

toxic media must be well flushed and

cleaned before being returned to the manu-

facturer's works.

It is imperative to enclose a safety information

sheet / general safety certificate on the field of ap-

plication with the return consignment.

Pre-printed forms are enclosed with the installation

and operating manual.

Safety precautions and decontamination methods are

to be mentioned.

3.2 Disposal

Parts of the pump may be contaminated with medium

which is detrimental to health and the environment

and therefore cleaning is not sufficient.

Risk of personal injury or damage to the

environment due to the medium or oil!

♦ Wear protective clothing when work is performed

on the pump.

♦ Prior to the disposal of the pump:

♦ Collect any medium, oil etc. which has es-

caped and dispose of it in accordance with the

local regulations.

♦ Neutralise any medium residues in the pump.

♦ Separate pump materials (plastics, metals etc.)

and dispose of them in accordance with the local

regulations.

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4 Product description

The housing dimensions, nominal ratings and tech-

nical requirements of the pump series RMI-B corre-

spond to ISO 2858 / DIN EN 22858 / DIN EN ISO

15783 / DIN EN ISO 5199. The technical require-

ments of the VDMA 24279 are satisfied

The sectional drawing shows the design of the pump.

See Section 9.2.

All components which come into contact with the me-

dium are either plastic-lined or made of other resistant

materials, e.g. silicon carbide.

The housing 100 consists of a metallic shell with a

plastic lining.

The shaft spider 338 is pressed into the housing and

secured with the anti-torsion inserts 566/1.

The two bearing bushes 545 are pressed in from the

bearing pedestal side and secured with the anti-

torsion insert 566/2.

The distance ring 504/1 is inserted in-between.

The can 159 is made of high-resistance CFK (carbon

fibre composite material). It is protected against the

corrosive medium by a can insert 158 made of PTFE.

The thrust ring 510/3 is pressed in and locked with the

shaft 222 in a form-locking manner against twisting.

The shaft 222 is positively mounted in the can insert

158.

The impeller 230 and the inner magnet assembly 859

are separable and thus can be exchanged inde-

pendently of one another. Both components are posi-

tively connected to one another for force transmission.

The static tightness of the pump is guaranteed by

the screw fittings of the bracket 344 and housing

100. The bearing pedestal gasket 401 and the lips of

the can unit are jammed between both components

with the required sealing force.

The torque is transmitted from the motor shaft

through whose key to the drive magnet assembly

858.

This is secured axially on the motor shaft with two

setscrews 904/1. The magnets are glued in the drive

magnet assembly.

In the case of a leakage of the can unit, the closed

lamella construction provides a temporary additional

protection against media leakage into the

atmosphere.

The flushing flow is guided on the outside past the

impeller assembly into the can. The flushing flow

returns to the housing through flushing bores in the

impeller assembly and through the plain bearings.

Further design details are provided in the enclosed

drawing. Additional information are provided in the

brochure and the product manual.

Series RMI-B close-coupled design Page 11

9430-055-en Revision 00

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5 Installation

5.1 Safety regulations

Equipment which is operated in potentially

explosive areas must satisfy the explosion

protection regulations.

People with a pacemaker are at risk from the

strong magnetic field of the magnetic drive. It

may be life-threatening for them to stay at a

distance of less than 500 mm to the pump.

5.2 Installation of pump/unit

The structural work must be prepared in accordance

with the dimensions in the installation drawing.

Method of installation: on a grouted base plate and

firm foundation

♦ Align base plate on the ground foundation.

♦ Insert foundation bolts and grout base plate.

♦ Do not tighten the foundation bolts uniformly and

firmly until the mortar has set.

Other possibilities of installing the pump are:

♦ 4-point installation

♦ 4-point installation with base plate.

As soon as additional installations are

mounted, the stability of the entire unit

installed without a foundation must be

checked.

5.3 Alignment of pump - motor

The following information is of a general na-

ture. Special notes of the motor manufactur-

er are to be observed.

♦ Before starting alignment, undo the screw fitting of

the support bracket from the adapter and motor.

♦ Align the unit with the housing so that there is no

tension and retighten the screws.

♦ Use supports in the direct vicinity of the bolts foun-

dation/base plate.

5.4 Piping

Before the pump is installed, both, the suction and

supply lines as well as the discharge line are to be

cleaned.

Dirt or damage to the sealing surfaces is best avoided

if the flange covers remain on the flanges until just

before installation.

Use flange gaskets suitable for the medium.

The screw tightening torques in Section 1.1 are to

be observed for tightening the flange screws.

5.4.1 Nominal size

The operating design point of a centrifugal pump lies

at the intersection of the pump curve and the pipe

curve, see Fig. 2. The pump curve is provided by the

pump manufacturer. The pipe curve is determined

using diagrams or PC programs.

Fig. 2

Under no circumstances can the nominal size of the

piping be derived from the connected nominal size of

the pump.

The pipe nominal size can also be determined using

the flow rate as a rough guide.

)m(A

)s/m(Q

)s/m(v 2

The velocity in the suction line should not exceed 2.0

m/s and 5.0 m/s in the discharge line.

When determining the suction line nominal size, the

NPSH value (net positive suction head) must also be

observed. The NPSHR value required for the pump

is specified in the data sheet.

The NPSHR available in the plant

should be at least 0.5

m higher

than the NPSHR required for the

pump. Otherwise, this will lead to

a drop in the delivery head,

cavitation or even failure of the

pump.

Series RMI-B close-coupled design Page 12

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5.4.2 Nozzle loads

The pump can be subjected to nozzle loads acc. to

DIN EN ISO 5199. See also TIS 0541-02-0006.

Changes in the length of the piping caused by

temperature are to be allowed for by appropriate

measures, e.g. the installation of expansion joints.

5.4.3 Suction line

The suction lines must always be laid on a rising gra-

dient towards the pump. Otherwise, gas bubbles may

form which considerably reduce the suction line cross

section. Eccentric transition elements must be in-

stalled between different pipe diameters.

Valves which disrupt the course of flow should not be

installed directly upstream of the pump.

Fig. 3

5.4.4 Supply lines

Supply lines should vent towards the reservoir and

are therefore to be laid with a constant downward

gradient towards the pump. Should the piping

internals upstream of the pump be horizontal, a low

point can, of course, be located upstream of these

internals. From here the pipe is then laid with an

upward gradient to the pump so that the gas bubbles

which form here can escape through the pump.

Valves which disrupt the course of flow should not be

installed directly upstream of the pump.

5.4.5 Discharge line

Do not arrange the shut-off valve directly above the

pump but initially provide a transition section.

The discharge nozzle velocity of the medium can – if

necessary – be reduced.

5.4.6 Venting and evacuating

Venting can take place into the discharge line or

upstream of the discharge valve.

A venting line can also be used as a bypass, drain or

flushing line.

The pump housing is fitted with a drain connection

as a standard feature. Optionally, the drain bore can

be drilled.

See Fig. 4.

Fig. 4

5.5 Pipe fittings

The following pipe fittings are available from Richter

on request:

♦ Shut-off valves

♦ Check valves

♦ Sight glasses

♦ Priming vessels

♦ Strainers

♦ Pressure gauges

Fig. 5

Series RMI-B close-coupled design Page 13

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5.6 Monitoring facilities

Appropriate monitoring facilities are to be

recommended, depending on the require-

ments placed on operational safety and

availability of the unit.

Richter provides information on request and can sup-

ply:

♦ Flow meters

♦ Filling level indicators

♦ Motor load monitors

You can obtain the publications "Safe Operation of

Magnetic Drive Pumps" and "The Operation of

Centrifugal Pumps without NPSH Problems" on

request.

5.7 Drive

The power consumption of the pump at the operating

design point is specified in the data sheet and works

certificate. If the operating design point was not

known when the pump was dispatched, the power

consumption can be read off the appropriate perfor-

mance curves. The max. density, the max. viscosity

and a safety margin are to be allowed for.

Care must be taken when selecting the motor size to

ensure that the excess power is not too great but that

the requirements acc. to DIN EN ISO 5199 are satis-

fied. During start-up the magnetic drive could other-

wise stop.

The magnetic drive rating at the pump speed is given

in the pump data sheet.

If the motor rating exceeds this magnetic drive rating

– at pump speed -, it is necessary to check for any

stoppage of the magnetic drive.

This also applies if the required drive rating exceeds

80% of the magnetic drive rating – at pump speed.

Consult Richter if necessary.

Different operating data can be achieved without

changing the pump through the use of different

speeds, e.g. by means of a frequency converter.

The pump with base plate and motor is illustrated in

the installation drawing.

The operating manual of the motor manufacturer must

be observed.

A motor with a valid ATEX certificate is to be

used if employed in zone 1 and 2.

5.8 Electric connection

The operator is obligated to connect the assembly in

accordance with existing regulations (IEC, VDE,

etc.).

Only have the electric connection

performed by a qualified electrician.

Compare the available mains voltage with the infor-

mation on the type plate of the motor and select a

suitable circuit.

A motor protection device (motor-circuit switch) is

urgently recommended.

Danger of explosion if the electrical

installation is incorrect.

In potentially explosive areas IEC 60079-

14 must also be observed for the electrical

installation.

If the pump is mounted on a base plate, ensuring

electrical conduction through the use of a chopper

disk or contact disk on the housing foot and support

bracket.

The assembly must be grounded in accordance with

currently effective regulations, for example, on the

base plate.

Series RMI-B close-coupled design Page 14

9430-055-en Revision 00

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6 Commissioning / Shutdown

6.1 Initial commissioning

Normally, the pumps have already been test-run with

water.

Unless special agreements have been reached, there

may still be some residual amounts of water in the

pump. This must be noted in view of a possible

reaction with the medium.

6.1.1 Filling the pump housing

♦ Check to see whether the screws on the suction

flange, discharge flange, housing flange and drain

flange are tightened. When tightening the housing

screws, make sure that the screw connection on

the support bracket of the adapter or the motor is

released. Otherwise, the pump could be deformed.

For screw tightening torques see Section 1.1.

♦ Open the suction line fully so that the medium can

flow into the pump.

♦ Open the discharge valve so that the air in the

pump can escape.

♦ If air cannot be vented into the discharge line, e.g.

a drop in pressure in this line is not permitted,

venting must be performed upstream of the dis-

charge valve.

♦ Monitor the venting operation until no air but only

liquid emerges.

♦ Turn the pump shaft at the coupling several times.

♦ Monitor the venting operation again until no more

air emerges.

♦ Close the discharge valve again until only

the minimum flow rate is obtained after the

motor has been started.

6.1.2 Start-up

♦ Check to see whether the pump shaft can

be readily turned by hand.

♦ As viewed from the motor, the direction of rotation

of the pump is clockwise. See also the direction

of rotation arrow of the pump.

The pump must not run dry during the

check of the direction of rotation.

The pump must be completely filled with liquid.

The maximum admissible flow rate must not be ex-

ceeded.

Otherwise the plain bearings can run dry in

both cases.

♦ Switch the motor on.

♦ Set the desired flow by opening the discharge

valve.

When the motor is running but the pump is

not conveying, this means that the magnetic

drive has stopped.

♦ Switch motor off immediately in order to prevent

overheating of the magnet assemblies.

Then proceeded as follows:

♦ Close discharge valve down to the position "min-

imum flow rate"

♦ Start motor again.

If the magnetic drive stops again, look for the cause.

6.2 Operating limits

The operating limits of the pump/unit in

terms of pressure, temperature, power and

speed are entered in the data sheet and it

is imperative to observe them!

6.2.1 Abrasive media

If liquids with abrasive constituents are

conveyed, increased wear at the pump is to

be expected. The inspection intervals are to

be reduced compared with the usual times.

6.2.2 Min./max. flow rate

The operating range generally recommended lies at

0.3 Qopt to 1.1 Qopt. Consult the manufacturer for

operation outside this range and observe Section

2.6.2.

Series RMI-B close-coupled design Page 15

9430-055-en Revision 00

TM 9886 Edition 03/2018

6.3 Shutdown

♦ Close discharge valve down to the position "mini-

mum flow rate"

♦ Switch motor off.

♦ Close discharge valve completely.

Only close the suction line if the pump is to be evacu-

ated or dismantled.

For all work on the machine, make sure that

the motor cannot be inadvertently switched

on.

If the pump is to be evacuated or flushed,

observe the local regulations.

If the pump has been operated

with a

chargeable liquid, it must be filled with inert

gas (e.g. nitrogen) to prevent an explosive

atmosphere.

It is recommended to wait one hour before the pump

is dismantled from the plant to permit static peak

charges to be eliminated.

If the pump is returned to the manufacturer's, clean

the pump very thoroughly.

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