MIYAWAKI ESH8N User manual

 
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
OPERATING MANUAL
FOR
BELL MIGHTY STEAM TRAP
MODEL:ESH8N
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

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SAFETY
The following warnings and cautions are shown
at appropriate places in this manual.
WARNING
Failure to observe this type of
precaution may lead to serious
injury or death.
CAUTION
Failure to follow this type of
precaution can lead to injury or
damage to equipment and
property.

S No. on the name plate of our product indicates a manufacturing date.
Indicating method of S No.
S.No. □□□□
indicates a day
indicates a month
indicates a year
Example of indicating a year
03 →200313 →2013
Method of indicating a month
Mark
Month
Mark
Month
Mark
Month
Mark
Month
1
January
4
April
7
July
X
October
2
February
5
May
8
August
Y
November
3
March
6
June
9
September
Z
December
Method of indicating a day
Mark
Day
Mark
Day
Mark
Day
Mark
Day
1
1
9
9
H
17
Q
25
2
2
A
10
J
18
R
26
3
3
B
11
K
19
S
27
4
4
C
12
L
20
T
28
5
5
D
13
M
21
U
29
6
6
E
14
N
22
V
30
7
7
F
15
O
23
W
31
8
8
G
16
P
24
(Example)
In case that S.No. is 0316, the manufacturing date is January 6, 2003
In case that S.No. is 13XM, the manufacturing date is October 21, 2013

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CONTENTS
1．Introduction････････････････････････････････････ P.1
2．Dimensions and Specifications･･･････････････････P.1
3．Installations････････････････････････････････････P.2
4．Trouble Shooting･･･････････････････････････････P.3
5．Maintenance, Disassembling and Assembling･････P.4
6．Construction ････････････････････････････････････ P.6・7
★ Guidance for reading special product name・・・・・・・ P.8
7. Warranty・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ P.7

- 1 -
1. Introduction
“Bell Mighty” inverted bucket Model ESH8N Series are for multipurpose steam traps
especially for small capacities.
It is made in three connection types screw threaded, flanged and socket weld.
This manual contains Installation, Trouble Shooting and Maintenance etc..
Never fail to read them to the end before using.
2. Dimensions and Specifications
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
ESH8N･ESH8NWESH8NF
㻌
Model No.
㻌
㻌
Connections
㻌
Size
mm
(inch)
Maximum
Operating
Pressure
PMO(MPa)
Maximum
Operating
Temperature
℃（ﾟ
F
）
Material
of
Body
Dimensions
(mm)
Weight
(kg)
L H1 H2 W
ESH8N-21
Screwed
15(1/2)
2.1
400

(752)
Cast
Carbon
Steel

(SCPH2)
220
114 111 146 11.0
20(3/4)
25(1)
224
ESH8N-45
15(1/2)
4.4 220
20(3/4)
25(1)
224
ESH8NF-21
Flanged
15(1/2)
2.1
250
114 111 146
Refer to
Table A
20(3/4)
25(1)
ESH8NF-45
15(1/2)
4.4
20(3/4)
25(1)
ESH8NW-21
Socket
Weld
15(1/2)
2.1
220
114 111 146 11.0
20(3/4)
25(1)
ESH8NW-45
15(1/2)
4.4
20(3/4)
25(1)
Size
JIS
ASME/JPI
10K,16K
20K
30K
40K
150lb
300lb
600lb
15mm(1/2in.)
11.0
12.4
12.8
11.4
12.1
20mm(3/4in.) 12.4 13.7 14.0 11.8 12.8 13.2
25mm(1 in.) 13.2 13.6 14.6 15.0 12.4 13.6 14.0
●Maximum allowable pressure(PMA
）：
4.4MPa ●Maximum allowable temperature(TMA
）：
400
℃
(752
ﾟ
F)
Table A
：
Weight of Flange Types
            
Weight
：kg
1

- 2 -
3. Installations
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●Before installing the trap always blow off the sludge, scales, etc.
from the piping.
●This trap can be installed horizontally.
1) Install trap according to the direction of the arrow on the body.
2) Pipe the outlet condensate recovery piping at the lowest point of the steam
using equipment.
The trap should be installed that condensate will flow naturally into the trap.
3) When recovering the condensate outlet branch line should be piped from the
steam trap as the drawing A below.
Install a check valve on the downstream side on the trap.
4) If the trap is installed higher than the steam using machinery please install
lift fitting as drawing B below for better performance.
5) If installed on cylinder dryer please install lower than the lowest point of
the cylinder and minimize the horizontal piping.
Also do not insulate the piping.
6) The trap should be installed for easy maintenance.
7) Upon start up inspect the followings.
a) Leak from the sealing of Body(1) and Cover(2) if leaking retighten the Cover
Bolt(20),(22) evenly.
b) Leak from the Plug(3),(4),(28).
Re-tighten them.


！ &$87,216
Lift Fitting
One size smaller
Heat Exchanger
Trap
Condensate Tank
Branch Line
Recovery Main
Check Valve
Drawing A
Drawing B
2

- 3 -


４．Trouble Shooting
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
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1)Inlet valve closed.
2)Over pressure
A)Check operating conditions reduce inlet pressure or change
Valve(6) and Valve Seat(5) to higher pressure.
3)Plugged Strainer
A)Disassemble Body Plug(3) and clean the strainer Screen(17)
4)Plugged air vent.
A)Disassemble Cover(2) clean the air vent on the Bucket(9).
B)To prevent further clogging scrabble wire can be installed.
5)Plugged orifice on Valve Seat(5).
A)Disassemble Cover(2) clean the orifice on the Valve Seat(5).
6)Bucket out of place with valve closed.
A)Disassemble Cover(2) install Bucket(9) in correct place.
1)No condensate coming to the trap.
A)Leaking by-pass-valve or flanges upstream.
B)For cylinder dryers, broken or damaged siphon tubing.
C)Vacuum created on the upstream piping.
Install vacuum breaker upstream.
1)Normal Function
1)Loss or prime
A)Out ESH Series has self-priming effect. If normal amount
on condensate flows into the trap it will self-prime.
B)Close the upstream val
ve for a few minute and open the
valve gradually.
C)It is not recommended to install inverted bucket on super
heated lines and lines that pressure fluctuates.
2)Scales lodged between Valve(6) and Valve Seat(5).
A)Disassemble Cover(2) clean the Valve(6) and
Valve
Seat(5).
3)Worn Parts
Disassemble Cover(2) exchange the Valve(6) and Valve
Seat(5).
4)Bucket out of place with valve opened.
Disassemble Cover(2) install Bucket(9) in correct place.
A)Lack of capacity
Check the operating conditions, replace the trap with larger
capacity.
1)By installing one trap to several lines short circuiting will
occur.
A)Install trap to each line.
2)Steam locking-Cylinder Dryer.
A)Having steam formed inside the si
phon tube, although
condensate is made in the cylinder dryer, the trap might
lack capacity.
Replace to another type with larger capacity.
3)Steam locking-Submerged coils, and similar conditions:
A)By not having lift fitting structure steam will come to the
trap even though condensate formed.
Check the upstream piping and install lift fitting.
COLD
IS THE
TRAP
COLD
OR
HOT
HOT
IS THE TRAP
DISCHARGING

&217,18286


&21'(16$7(


67($0
IS THE STEAM
USING
EQUIPMENT
OBTAING
ENOUGH HEAT
IS THE TRAP
OPERATING
INTERMITTENT
NO.
YES.
YES.
YES.
NO.
NO.
Inverted bucket trap has intermittent
operation function. It will discharge
and stop at certain cycles.
The improper operations will be:
No discharge, trap hot or cold.
Continuous discharge condensate or
steam.
YES.
3

- 4 -
5.Maintenance, Disassembling and Assembling

When disassembling a hot trap, be sure to release the pressure
inside to atmospheric pressure, and cool the trap before the work.
1. Disassemble Body Plug(3) take out the Screen(17) check and clean.
2. Disassemble Cover Bolt(20),(22) take off the Cover(2),the internals（Valve Seat(5), Valve(6),
 Valve Holder(7), Pin(8), Bucket(9), Eye Bolt(10), Eyebolt Pin(12), Lever B(11), Lever A(13),
Bracket(14), Pin(15), Set Bolt(16) will come together as the drawing C.
Drawing ＣDrawing Ｄ
3. Take off the Pin(15), unscrew the Set Bolt(16) also unscrew the Valve Seat(5) with a
wrench.
4. Take off the Pin(8) the Valve(6) and Valve Holder(7) comes apart from the Lever A(13).
5. Teke off the split pin and Eyebolt Pin(12) the Bucket(9) will come apart.
6. Clean and check the parts accordingly if all the parts are in normal condition install in
 the opposite of disassembling. If parts are worn or defected please replace.
Please thoroughly check the Valve(6), Valve Seat(5) and Valve Holder(7).
When replacing the Valve(6) and Valve Seat(5) always replace the two together as they
are lapped together in the factory.

●When reassembling always replace the Cover Gasket(21) to new one.
●Also the Cover Bolt(20),(22) should be tightened evenly.
No.
Parts
Size
Clamp Torque
Tools
5
Valve Seat
23mm
120N
･
m (1200kgf
･
cm)
Wrench
16
Set Bolt
13mm
21N
･
m (210kgf
･
cm)
Wrench
20
Cover Bolt
19mm
120N
･
m (1200kgf
･
cm)
Wrench
22
Cover Bolt
17mm
80N
･
m (800kgf
･
cm)
Wrench
9.Bucket
16.Set Bolt
2.Cover
13.Lever A
！ &$87,216
！ :$51,1*
15.Pin
13.Lever A
6.Valve
16.Set Bolt

For only ESH8N-21 Type
4

- 5 -
4.Plug
13.Lever A
8.Pin
2.Cover
6.Valve
7.Valve Holder
5.Valve Seat
21.Gasket
26.C-Ring
15.Pin
14.Bracket
9.Bucket
1.Body
3.Plug
17.Screen
20.Bolt
11.Lever B
12.Eyebolt Pin
10.Eyebolt
22.Bolt
23.Gasket
24.Spacer
16.Set Bolt
5

- 6 -
6.Construction
ESH8N
ESH8NF
ESH8NW
1. Body
2. Cover
3. Plug
4. Plug
5. Valve Seat
6. Valve
7. Valve Holder
8. Pin
9. Bucket
10. Eyebolt
11. Lever B
12. Eyebolt Pin
13. Lever A
14. Bracket
15. Pin
16. Set Bolt
17. Screen
18. Name Plate
19. Rivet
20. Bolt
21. Gasket
22. Bolt
23. Gasket
24. Spacer
26. C-Ring
28. Plug
29. Pin
31. Spacer
(Screwed end)
Flanged end
Socket Weld end
6