16

own axis during pump operation
and thus causing deformation of
the packing. This predicament
can be solved by either manually
shutting off the water whenever
the pump is not running or
installing a solenoid valve for
this purpose.

2. Another factor that should be

controlled to limit the amount of
water from getting into the
drilling mud is the pressure of
water for the flush system.
Pressure as small as 5psi is
usually enough to provide the
required lubrication for the
packing rings. A pressure
regulator should be preferably
incorporated into the water flush
system for this purpose.

3. Bearing failure is the biggest

contributor to pump maintenance
costs. So it is imperative that care
be taken not to run the pump if
the bearing condition is suspect.
A quick check that can be easily
performed is to estimate the
temperature of the pump housing
by placing a hand on it. Usually
if a person can comfortably keep
his/her hand on the pump
housing for a little while then the
temperature is not more than 150

º

F. If the temperature seems

more than that then the chances
are either that the bearings have
started to fail or that there is a
lack of lubrication for them.
Replacing bearings at this stage
is more cost effective than
waiting longer and then having to
replace a number of other parts
as well.

4. One of the most common reasons

for bearing failure is
misalignment between the pump

and the motor. Hence it is very
important to check alignment not
only before starting the pump for
the first time but to also do it
periodically.

5. Care should be taken not to

increase the suction line velocity
beyond 10ft/sec because that can
result in turbulence as well as
cavitation. These conditions will
adversely affect the efficiency
and the life of the pump,
respectively.

6. Perhaps the most important

factor for predictable pump
performance is the Available Net
Positive Suction Head (NPSH

A

).

Simply put, it means that the
height of the fluid in the supply
tank above the suction level of
the pump should be enough to
prevent the fluid from entering
the pump at a pressure which is
below its vapor pressure at that
temperature. If such flow
conditions cannot be avoided,
cavitation occurs which is the
boiling of that fluid at the
operating temperature and then
the bubbles being created during
that boiling process implode and
damage the various pump and
system components. Thus to
prolong the life of the pump
always ensure that the pump has
the recommended NPSH

A.

7. In case of indoor storage, it is

desirable to avoid temperature
extremes, excessive moisture and
vibrations.

8. It should be standard procedure

to check the resistivity of motor
windings at the time of placing
them in storage and again when it
is time to take the motor out and
use it. A difference of more than

17

50% necessitates the drying of
these windings before the pumps
operation.

9. Whenever pulling the pump and

the motor out of storage, it is
recommended to remove all the
old grease from the bearings and
replenish them with fresh new
grease.

10. It is also recommended to

manually turn the shafts of the
motor and the pump at least once
every two months.

11. If the pumps are to be stored

outdoors for an extended period
of time, it is good practice to
properly seal off the suction and
discharge openings, to prevent
rust from attacking the pump
casing and impeller.
Note: A written record of all the
storage procedure and actions
should be maintained.

18

Table 1: Mud Hog Spare Parts List.

ITEM NO.

COMMODITY NUMBER

QUANTITY

DESCRIPTION

MATERIAL

1

052136610

1

Frame

Gray Cast Iron

* 2

WVCCCF118

1

Plastic Plug

Plastic

* 3

WWWX00011

1

Plug for Breather Port

Carbon Steel

* 4

WWWX00012

2

Oil Plug

Carbon Steel

5

WVIN00262

1

Outboard Bearing Labyrinth Seal

Bronze

6

052136910

1

Outboard Bearing Cover

Gray Cast Iron

7

WWW00C003

2

Outboard/Inboard Bearing Grease Fitting

Steel

8

WWG31D107

2

Outboard Bearing Cover Bolt

Low Alloy Steel

9

WWB254P41

1

Outboard Bearing Housing Seal

Buna-N

10

WWESK7311

2

Outboard Bearing

Steel

11

WV00W1100

1

Bearing Lock washer

Carbon Steel

12

WV00N1100

1

Bearing Locknut

Carbon Steel

13

052136810

1

Outboard Bearing Housing

Gray Cast Iron

14

WWG31H1H7

4

Outboard Bearing Housing Bolt

Low Alloy Steel

15

WWJ31H800

2

Outboard Bearing Housing Nut

Stainless Steel

16

WWB248P41

1

Outboard Bearing Cover Seal

Buna-N

17

052133900

1

Shaft

Low Alloy Steel

18

WWW00A004

1

Coupling End Key

Low Alloy Steel

19

WWENT5313

1

Inboard Bearing

Steel

20

052136710

1

Inboard Bearing Cover

Gray Cast Iron

21

052137400

1

Inboard Bearing Cover Gasket

Fiber

22

WWG31H1H7

2

Inboard Bearing Cover Bolt

Low Alloy Steel

23

WWWX00111

1

Inboard Bearing Cover Grease Plug

Carbon Steel

24

WVINM0026

1

Inboard Bearing Labyrinth Seal

Bronze

25

WWG31S28F

2

Jack Bolt

Stainless Steel

* ^ 26

WWJ51H800

4

Wear Pad Nut

Stainless Steel

27

WWWX00015

1

Casing Drain Plug

Carbon Steel

^ 28

052134310

1

Casing

Gray Cast Iron

* ^29

WWHS1H28A

4

Wear Pad Stud

Low Alloy Steel

* ^30

052139002

1

Wear Pad Gasket

Fiber

* ^31

052134910

1

Wear Pad

Hard Iron

32

052137100

1

Casing Gasket

Fiber

33

WWHS1S3HA

12

Casing Stud

Low Alloy Steel

34

WWJ11S800

12

Casing Stud Nut

Stainless Steel

* ^ 35

05213601C

1

Impeller

Hard Iron

36

WWB032V40

1

Impeller Seal

Fluoroelastomer

* 37

052137080

1

Shaft Sleeve

Stainless Steel

* 38

WVBUF9085

1

Mechanical Seal - TC

Stainless Steel /
Tungsten Carbide

38a

-

1

Pressed Ring

-

38b

-

1

Spring

-

38c

-

1

Rotating Element

-

38d

-

1

Stationary Element

-

39

052136410

1

Stuffing Box Cover for Mechanical Seal

Hard Iron

40

052137280

2

Gland Assembly Bolt

Stainless Steel

41

WWG31H187

2

Stuffing Box Cover Bolt

Low Alloy Steel

42

052141500

1

Packing, 3 Rings for Mechanical Seal

Teflon/Graphite

43

052136500

1

Gland Set

Stainless Steel

44

WWB225V40

1

Shaft Sleeve Seal

Fluoroelastomer

45

052141400

1

Name Plate

Stainless Steel

46

WWGT06060

4

Drive Screws

Stainless Steel

47

WWL1040HS

1

Roll Pin

Steel

* ALTERNATE OPTIONS AVAILABLE. CONTACT YOUR LOCAL SALESPERSON.
^ ACTUAL PART NUMBER DEPENDS ON PUMP SIZE

19

COMMODITY NUMBER

DESCRIPTION

052134000

RK,3X2X13 CASING, CP

052134100

RK,4X3X13 CASING, CP

052134200

RK,5X4X14 CASING, CP

052134300

RK,6X5X11 CASING, CP

052134400

RK,6X5X14 CASING, CP

052134500

RK,8X6X11 CASING, CP

052134600

RK,8X6X14 CASING, CP

052134700

RK,4X3X13 WEARPAD, CP

052134800

RK,5X4X14 WEARPAD, CP

052134900

RK,6X5X11 WEARPAD, CP

052135000

RK,6X5X14 WEARPAD, CP

052135100

RK,8X6X11 WEARPAD, CP

052135200

RK,8X6X14 WEARPAD, CP

052137000

RK,SLEEVE SS, 2.5 CP

052144200

RK,SLEEVE CERAMIC CTD 2.5 CP

052149000

RK, LIP SEAL, 2.5 CP

WVBUF9000

RK,MECHANICAL SEAL -2.5CP-TC

WVBUF9000

RK,MECHANICAL SEAL -2.5CP-TC

052145400

FLUID END GASKET KIT

20

052145500

POWER END GASKET KIT

052145600

LABYRINTH SEAL REPLACEMENT KIT

21

052145700

LOCKNUT REPLACEMENT KIT

Table 2: Mud Hog Repair Kits

22

Figure 6-1: Casing and parts

Figure 6-2: Frame, Stuffing Box Cover, Impeller and parts

23

Figure 6-3: Frame, Inboard Bearing Housing Cover and parts

Figure 6-4: Shaft, Bearings and parts

DMP 457

Pressure Transmitter for
Shipbuilding and Offshore

The pressure transmitter DMP 457 has been
designed for rough conditions occuring es-
pecially in shipbuilding and offshore applica-
tions.

Sensor element is a piezoresistive stainless
steel sensor with high accuracy and excel-
lent long term stability.

All gaseous and liquid media, which are
compatible with stainless steel 1.4571
(316Ti) respectively 1.4435 (316L) and FKM,
can be used.

In order to meet the special requirements for
shipbuilding and offshore applications ex-
tensive tests had to be passed to get the
Germanischer Lloyd (GL) and Det Norske
Veritas (DNV) approvals.

Typical areas of use for shipbuilding / off-
shore are:

►

diesel engines

►

gears

►

compressors

►

pumps

►

boilers

►

hydraulic and pneumatic controls

►

elevators

C

h

aracteris

tics

►

small thermal effect

►

excellent linearity

►

option: flush pressure port

►

in preparation:

option Ex: II 1 G EEx ia IIC T4
(TÜV 03 ATEX 2006 X)

►

customer specific versions:

-

special pressure ranges

-

other versions on request

DMP 45

7

Transmitter

for

Shi

pbuilding and

O

ffs

hore

BD SENSORS GmbH

BD-Sensors-Strasse 1

Telefon [phone] / 98 11- 0

www.bdsensors.de

D - 95199 Thierstein

Telefax +49 (0) 92 35 / 98 11- 11

[e-mail]

►

piezoresistive stainless steel
sensor

►

accuracy:
0.175% / 0.125% FSO BFSL
(0.350% / 0.250% FSO IEC 60770)

►

nominal pressure ranges
from 0 ... 40 mbar
up to 0 ... 600 bar

O p t i o n : F r o n t b ü n d i g

Input pressure range

Nominal pressure gauge

[bar] -1 ... 0 0.04 0.06

0.1

0.16

0.25 0.4 0.6

1

1.6

2.5

4

6

10 16 25

40

Nominal pressure abs.

[bar]

-

-

-

0.1

0.16

0.25 0.4 0.6

1

1.6

2.5

4

6

10 16 25

40

Permissible overpressure [bar]

3

0.2

0.2

0.5

0.5

1

1

3

3

6

6

20 20 20 60 60

100

Nominal pressure gauge

1

[bar]

60

100

160

250

400

600

Nominal pressure abs.

[bar]

60

100

160

250

400

600

Permissible overpressure [bar]

140

340

340

600

600

1000

Output signal / Supply

Standard

2-wire:

4 ... 20 mA / V

S

= 12 ... 36 V

DC

(rated: 24 V

DC

)

Ex-protection: V

S

= 14 ... 28 V

DC

2

Performance

Accuracy

3

standard:

≤ ± 0.35 % FSO

(BFSL:

≤ ± 0.175 % FSO)

pressure

≤ 0.4 bar:

≤ ± 0.5 % FSO

(BFSL:

≤ ± 0.25 % FSO)

option (pressure > 0.4 bar):

≤ ± 0.25 % FSO

(BFSL:

≤ ± 0.125% FSO)

Permissible load

R

max

= [(V

S

– V

S min

) / 0.02]

Ω

Influence effects

supply:

0.05 % FSO / 10 V

load:

0.05 % FSO / k

Ω

Long term stability

≤ ± 0.1 % FSO / year

Response time

< 5 ms

Thermal errors

(Offset and Span)

Nominal pressure P

N

[bar]

-1 ... 0

≤ 0.1

≤ 0.25

≤ 0.4

≤ 1.0

> 1.0

Tolerance band

[% FSO]

≤ ± 0.75

≤ ± 2.0

≤ ± 1.5

≤ ± 1.0

≤ ± 1.0

≤ ± 0.75

TC, average

[% FSO / 10 K]

±

0.07

±

0.3

±

0.2

±

0.14

±

0.1

±

0.07

in compensated range

[°C]

0 ... 70

0 ... 50

0 ... 70

Electrical protection

Reverse polarity protection

no damage, but also no function

Electromagnetic compatibility

emission and immunity according to
- EN 61326
- Germanischer Lloyd (GL)
- Det Norske Veritas (DNV)

Option Ex-protection

2

DX13-DMP 457

II 1 G EEx ia IIC T4
safety technical maximum values: U

i

= 28 V, I

i

= 93 mA, P

i

= 660 mW

Permissible temperatures

Medium

-25 ... 125 °C

Electronics / environment

-25 ... 80 °C

Storage

-40 ... 125 °C

1

measurement starts with ambient pressure

2

in preparation

3

accuracy according to IEC 60770 – limit point adjustment (non-linearity, hysteresis, repeatability)

DMP 457

Transmitter for Shipbuilding / Offshore

Technical Data

pressure measurement

Mechanical stability

Vibration

4 g (5 ... 100 Hz)

Mechanical connection

Standard Optional

G1/2“ DIN 3852

G1/4“ DIN 3852

G1/4“ EN 837

1/2“ NPT

1/4“ NPT

M20x1.5

M10x1

M12x1

M12x1.5

G1/2“ EN 837

G1/2“ flush DIN 3852

4

G1/2“ open port DIN 3852

4

M20x1.5

Electrical connection

5

Standard Optional

DIN 43650 (IP 65)

Cable gland (IP 67)

Cable gland (IP 67)

Cable outlet (IP 68)

cable without air tube

cable with air tube

cable without or with

air

tube

6

4

G1/2” flush and G1/2” open port only up to 40 bar

5

Generally shielded cable has to be used! Cable versions are delivered with shielded cable. For DIN 43650 the use of shielded cable is compulsory.

6

tested at 4 bar or 40 mWC for 24 hours

DMP 457

Transmitter for Shipbuilding / Offshore

Technical Data

www.bdsensors.de

Materials

Pressure port

stainless steel 1.4571 (316Ti)

Housing

stainless steel 1.4301 (304)

Seals (media wetted)

standard: P

N

≤ 40 bar: FKM

P

N

> 40 bar: NBR

optional: welded version

7

; others on request

Diaphragm

stainless steel 1.4435 (316L)

Media wetted parts

pressure port, seals, diaphragm

Miscellaneous

Current consumption

max. 25 mA

Weight

approx. 140 g

Installation position

any

8

Operation life

> 100 x 10

6

cycles

Pin configuration

Electrical connection

DIN 43650

Cable colours

(DIN 47100)

2-wire-system

Supply +

Supply –

1
2

white

brown

Ground

ground pin

yellow / black

Wiring diagram

2-wire-system (current)

7

welded version only for pressure ports according to EN 837; not possible for pressure ranges

≤ 0.16 bar and > 25 bar

8

Pressure transmitters are calibrated in a vertical position with the pressure connector down. If this position is changed on installation there can be slight

deviations in the zero point for pressure ranges P

N

< 1 bar.

DMP457_E_190405

Telefon [phone] / 98 11- 0

www.bdsensors.de

Telefax +49 (0) 92 35 / 98 11- 11

[e-mail]

T

hi

s data sheet contai

ns products spe

ci

fic

at

ion;

properti

es are not guaranteed. S

ubj

ect to chan

ge w

ithout noti

ce.

DMP 457

Transmitter for Shipbuilding / Offshore

Technical Data

-

- - -

-

- -

Pressure

1

6 0 0
6 0 1

Input

[bar]

0,04

2

0 4 0 0

0,06

2

0 6 0 0

0,10

1 0 0 0

0,16

1 6 0 0

0,25

2 5 0 0

0,40

4 0 0 0

0,60

6 0 0 0

1,0

1 0 0 1

1,6

1 6 0 1

2,5

2 5 0 1

4,0

4 0 0 1

6,0

6 0 0 1

10

1 0 0 2

16

1 6 0 2

25

2 5 0 2

40

4 0 0 2

60

6 0 0 2

100

1 0 0 3

160

1 6 0 3

250

2 5 0 3

400

4 0 0 3

600

6 0 0 3

-1 … 0

X 1 0 2
X X X X

Output

1
E

X

Accuracy

standard

0,35 %

3

standard for P

N

≤

0,4 bar

0,5 %

5

option for P

N

> 0,4 bar

0,25 %

2

X

Electrical Connection

3

G 1 0

3, 4

G 0 0

3, 5

4 0 0

3, 6

T R 0

X X X

Mechanical Connection

1 0 0
2 0 0
3 0 0
4 0 0
F 0 0

H 0 0
N 0 0
N 4 0
X X X

Seals

for P

N

= 40 bar

FKM

1

7

2

for P

N

> 40 bar

NBR

5

X

Special version

0 0 0

X X X

1

measurement starts with ambient pressure

2

Nominal pressure absolute not possible for P

N

< 0.1 bar

3

Shielded cable has to be used! Cable versions are delivered with shielded cable.
For DIN 43650 the use of shielded cable is compulsory.

4

female plug DIN is GL-approbated

5

different cable types and lengths deliverable, standard: 2 m PVC cable (without ventilation tube), optionally cable with ventilation tube

6

price without cable; different cable types and lengths deliverable, standard: 2 m PVC cable (with ventilation tube), optionally at absolut version cable without ventilation tube;

7

welded version only with pressure ports according to EN 837; not possible with pressure ranges = 0.16 bar and > 25 bar

Male and female plug DIN 43650 GL

without (welded version)

customer

standard

customer

customer

1/4" NPT

1/2" NPT

G1/2" DIN 3852 with

flush sensor

G1/2" DIN 3852 open pressure port

G1/4" DIN 3852

G1/4" EN 837

G1/2" DIN 3852

G1/2" EN 837

customer

Cable gland incl. Cable

Cable output incl. Cable

customer

Male and female plug DIN 43650

customer

DMP 457

gauge

Intrinsic safety for zone 0 /

4 … 20 mA / 2-wire

4 … 20 mA / 2-wire

Ordering code DMP 457

absolut

This ordering code contains product specification; properties are not guaranteed. Subject to change without notice.

190405

BD SENSORS GmbH

BD-Sensors-Straße 1 Telefon [phone] / 98 11- 0 www.bdsensors.de
D - 95199 Thierstein Telefax +49 (0) 92 35 / 98 11- 11 [e-mail]

customer

Fax: [phone] / 98 11 -11