MIYAWAKI ES8N User manual

 
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OPERATING MANUAL
FOR
BELL MIGHTY STEAM TRAP
MODEL:ES8N
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INVERTED BUCKET STEAM TRAP

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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.
The following 4-digit or 9-digit ’S.No.' is displayed on the product.
●For 4-digit display
S.No. □□□□
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Represents the day.
Represents the month.
Represents the year. (last two digits of the
year according to the Western calendar)
●For 9-digit display
S.No. □□□□□□□□□
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MIYAWAKI identification number
Represents the month.
Represents the year. (last two digits of the
year according to the Western calendar)
Month designation system
Month 1 2 3 4 5 6 7 8 9 10 11 12
Symbol 1 2 3 4 5 6 7 8 9 X Y Z
Day designation system
Day 1 2 3 4 5 6 7 8 9 10 11 12
Symbol 1 2 3 4 5 6 7 8 9 A B C
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Day 13 14 15 16 17 18 19 20 21 22 23 24
Symbol D E F G H J K L M N O P
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Day 25 26 27 28 29 30 31
Symbol Q R S T U V W
Example of serial number designation
1711 → Jan 1, 2017
29XM → Oct 21, 2029
Example of serial number designation
17112C020 → Jan , 2017
29X05M050 → Oct , 2029

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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
★ Guidance for reading special product name・・・・・・・ P.9
7. Warranty・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ P.8

- 1 -
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1. Introduction
“Bell Mighty” inverted bucket Model ES8N Series are for multipurpose steam traps.
Especially for small capacities.
It is made in two connection types Screwed threaded which is ES8N and Flanged type
which is ES8NF
The number after type hypen represents the maximum operating pressure by kgf/cm2･g
Example ES8N-8 means the maximum pressure will be 8 kgf/cm2･g(0.8MPa).
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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㻌 㻌
Size
Operating
Maximum
Material
Dimensions
Weight
Model No.
Connections
mm
Pressure
Temperature
of
(mm)
㻌
㻌 㻌
(inch)
(MPa)
℃
(
Ｆ
)
㻌
Body
L
H1
H2
W
(kg)
ES8N-5
Screwed
15(1/2)
0.01 to 0.5
350

(662)
Ductile
Cast
Iron

(FCD450)
130
73 90 100
3.7
20(3/4)
25(1)
135
3.9
ES8N-8
15(1/2)
0.1 to 0.8 130 73 90 100
3.7
20(3/4)
25(1)
135
3.9
ES8N-16
15(1/2)
0.01 to 1.6 130 73 90 100
3.7
20(3/4)
25(1)
135
3.9
ES8NF-5
Flanged
15(1/2)
0.01 to 0.5
350

(662)
Ductile
Cast
Iron

(FCD450)
175
73
90
100
5.3
20(3/4)
195
68 95
5.7
25(1)
215
6.8
ES8NF-8
15(1/2)
0.1 to 0.8
175
73
90
100
5.3
20(3/4)
195
68 95
5.7
25(1)
215
6.8
ES8NF-16
15(1/2)
0.01 to 1.6
175
73
90
100
5.3
20(3/4)
195
68 95
5.7
25(1)
215
6.8
Model ES8N (Screwed)
Model ES8NF (Flanged)
Inverted Bucket steam trap, inverted bucket Model ES8N Series are for multipurpose steam traps.
Especially for small capacities.
1

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3. Installations
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●
Before installing the trap always blow off the slugges, scales, etc.
from the piping.
●
This trap can be installed horizontally.
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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 machinary 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.80mm clearance is necessary
for disassembling the cover.
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) evenly.
b) Leak from the Plug(3),(4).
Re-tighten them.
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！ &$87,216
Lift Fitting
One size smaller
Heat Exchanger
Trap
Condensate Tank
Branch Line
Recovery Main
Check Valve
Drawing A
Drawing B
2

- 3 -
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7URXEOH6KRRWLQJ
Problem
Reason
The Trap is not discharging.
The inlet valve closed.
The Trap is cold.
The operating prsssure is too high.
㻌
Check the operating conditions of the trap.
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If necessary reduce the inlet pressurer or
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change the Valve(6) and the Valve Seat(7)
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according to the higher operating pressure.
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The strainer is plugged.
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Remove the Body Plug(3)and clean the
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Screen(17).
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The air vent (hole in the Bucket(9)) is
㻌
plugged.
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The Valve Seat(5) is plugged.
The Trap is not discharging.
No condensate is flowing to the trap.
The trap is hot.
The by-pass valve or flange upstream are
㻌
leaking.
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In case of cylinder dryers the syphon tube
㻌
is damaged or broken.
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A vacuum had been created at the upstream
㻌
piping.
㻌
Install a vacuum breaker upstream.
The trap is discharging continuously
The capacity of the trap is too low.
condensate.
The Bucket(9)is out of place with the valve
㻌
closed.
The trap is blowing through steam.
Loss of prime.
㻌
The Series ES has a self-priming efect. If a
㻌
normal amount of condensate is flowing into
㻌
the trap, it will self-prime.
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Scales is lodged between the Valve(6) and
㻌
the Valve Seat(5).
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The Valve(6) or the Valve Seat(5) are
㻌
damaged.
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The Bucket(9)is out of place with the valve
㻌
opened.
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3

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6.Valve
13.Lever
16.Set Bolt
15.Pin
9.Backet
16.Set Bolt
2.Cover
13.Lever
5.Maintenance, Disassembling and Assembling
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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) take off the Cover(2),the internals（Valve Seat(5), Valve(6),
 Valve Holder(7), Pin(8), Bucket(9), Eyebolt(10), Eyebolt Pin(12), Lever(13), Bracket(14),
Pin(15), Set Bolt(16)）will come together as the drawing C.
Drawing ＣDrawing Ｄ
3. Take off the Pin(15), Valve(6), then Valve Holder(7), Pin(8), Bucket(9), Eyebolt(10),
Eyebolt Pin(12) and Lever(13) come apart together from the Cover(2) as the
drawing D.
4. Unscrew the Set Bolt(16) also unscrew the Valve Seat(5) with a wrench.
5. Take off the Pin(8), the Valve(6) and Valve Holder(7) comes apart from the
 Lever(13).
6. Take off the split pin and Eyebolt Pin(12) the Bucket(9) will come apart.
7. 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.
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●When reassembling always replace the Gasket(11),(21) to new ones.
●Also Bolt(20) should be tightened evenly.
No.
Parts
Size
Shape
Clamp Torque
Tools
5
Valve Seat
14mm
Haxagon
18N
･P
(180kgf
･
cm)

Wrench
16
Set Bolt
13mm
Haxagon
11N
･
m (110kgf
･
cm)
Wrench
20
Bolt
17mm
Haxagon
21N
･
m (210kgf
･
cm)
Wrench
！ &$87,216
！ :$51,1*
4

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4.Plug
13.Lever
8.Pin
4.Plug
2.Cover
6.Valve
7.Valve Holder
5.Valve Seat
21.Gasket
11.Gasket
15.Pin
14.Bracket
20.Bolt
16.Set Bolt
12.Eyebolt Pin
9.Backet
1.Body
3.Plug
17.Screen
5

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6.Construction
Model ES8N (Screwed)
1. Body
2. Cover
3. Plug
4. Plug
5. Valve Seat
6. Valve
7. Valve Holder
8. Pin
9. Bucket
10. Eyebolt
11. Gasket
12. Eyebolt Pin
13. Lever
14. Bracket
15. Pin
16. Set Bolt
17. Screen
18. Name Plate
19. Rivet
20. Bolt
21. Gasket
22. Weight
6

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Model ES8NF (Flanged)
1. Body
2. Cover
3. Plug
4. Plug
5. Valve Seat
6. Valve
7. Valve Holder
8. Pin
9. Bucket
10. Eyebolt
11. Gasket
12. Eyebolt Pin
13. Lever
14. Bracket
15. Pin
16. Set Bolt
17. Screen
18. Name Plate
19. Rivet
20. Bolt
21. Gasket
22. Weight
7

8
6 WARRANTY
6.1 Warranty period
The warranty period shall last 12 months from the date of product delivery.
6.2 Details of the warranty
If the product stops working correctly within the warranty period, we will repair or replace
the product free of charge if the cause of the trouble is not one of the following items.
1) The precautions described in this manual were not observed
2) User's errors or mistakes such as an inappropriate installation or incorrect handling,
or an excessively large impact caused by dropping
3) Problems caused by devices or equipment other than ours, or a disallowed use
environment
4) When a repair or modification has been performed by anyone other than us or people
who are authorized to make such repairs
5) Intrusion of salt or other substances that promote significant rust or corrosion or
problems from fluids that contain the same substances
6) Consumable parts such as Packing, Gasket, O-ring, Diaphragm, etc
7) Attachment or accumulation of foreign matter in the pipe, such as dust and scale
8) Problems from fires, natural disasters, or other force majeure which is not our
responsibility
6.3 Warranty limitation
The remedy available under the warranty shall not exceed the sales price of the products
delivered, for any cause whatsoever.
The warranty period is 18 months after shipment or 12 months after installation, whichever
occurs rst.
8
6 WARRANTY
6.1 Warranty period
The warranty period shall last 12 months from the date of product delivery.
6.2 Details of the warranty
If the product stops working correctly within the warranty period, we will repair or replace
the product free of charge if the cause of the trouble is not one of the following items.
1) The precautions described in this manual were not observed
2) User's errors or mistakes such as an inappropriate installation or incorrect handling,
or an excessively large impact caused by dropping
3) Problems caused by devices or equipment other than ours, or a disallowed use
environment
4) When a repair or modification has been performed by anyone other than us or people
who are authorized to make such repairs
5) Intrusion of salt or other substances that promote significant rust or corrosion or
problems from fluids that contain the same substances
6) Consumable parts such as Packing, Gasket, O-ring, Diaphragm, etc
7) Attachment or accumulation of foreign matter in the pipe, such as dust and scale
8) Problems from fires, natural disasters, or other force majeure which is not our
responsibility
6.3 Warranty limitation
The remedy available under the warranty shall not exceed the sales price of the products
delivered, for any cause whatsoever.
8
7
7
7
7
Warranty

★
Guidance for reading special product name
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□
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Special symbol: symbol apply only to special product
(Please refer to table 1 for details)
1 suffix English letter after “-“.
Model symbol: Product model number
㻌
Table 1 Symbol description
Suffix
Special contents
A
Approved high-pressure gas trap
C
Blow valve attached & countermeasure against scale
K
Change of gasket
L
Special face to face dimension
M
㻌
Change of parts material
P
㻌
Change of operating pressure
R
Change of screen mesh or countermeasure against scale
T㻌
Parts are standards, and the specification (operating temp, press.
etc.) is changed
V
Change of air vent
X
㻌
Other than mentioned above or complex of special contents above
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9