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 +49 (0) 92 35 / 98 11- 0
www.bdsensors.de
D - 95199 Thierstein
Telefax +49 (0) 92 35 / 98 11- 11
info@bdsensors.de
►
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 +49 (0) 92 35 / 98 11- 0
www.bdsensors.de
Telefax +49 (0) 92 35 / 98 11- 11
info@bdsensors.de
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 +49 (0) 92 35 / 98 11- 0 www.bdsensors.de
D - 95199 Thierstein Telefax +49 (0) 92 35 / 98 11- 11 info@bdsensors.de
customer
Fax: +49 (0) 92 35 / 98 11 -11
