MIYAWAKI DF1 User manual

 
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



OPERATING MANUAL

FOR

DIAFLAMG STEAM TRAP

DF1




Balanced Pressure Thermostatic Steam Trap



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
05 → 200515 → 2015
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 0516, the manufacturing date is January 6, 2005
In case that S.No. is 15XM, the manufacturing date is October 21, 2015

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CONTENTS
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1．INTRODUCTION･･････････････････････････････････P.1
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2．DIMENSIONS AND SPECIFICATIONS････P.1
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3．INSTALLATIONS･････････････････････････････････P.2
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

4．TROUBLE SHOOTING･･････････････････････････P.3
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5．MAINTENANCE･･･････････････････････････････････P.4
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6．CONSTRUCTION･････････････････････････････････P.5
7．WARRANTY･･･････････････････････････････････････････P.6
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★Guidance for reading special product name･･･P.7
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- 1 -


1. INTRODUCTION

Ball Float Steam Trap Model DF1-21 is equipped with a membrane capsule(“Dia-Thermo”)
and can be used up-to an operating pressure of 2.1 MPa.
The steam trap discharge the condensate automatically at a temperature 5℃/9 F(Dia-
Thermo H) or 15℃/27 F(Dia-Thermo L) below saturation temperature.
This manual contains INSTALLATION, TROUBLE SHOOTING and MAINTENANCE etc..
Never fail to read them to the end before using. 


2. DIMENSIONS AND SPECIFICATIONS







 



Size
Operating
Maximum
Material
Dimensions
Weight
(kg)
Model No.
Connection
mm
Pressure
Temperature
of
(mm)


(inch)
(MPa)
℃( F)
Body
L
H1
H2
W
DF1-21H
DF1-21L

15(1/2)



85
36
18

1.0
Screwed
20(3/4)



100
40
23
62
1.2

25(1)




DF1-21HF
DF1-21LF

15(1/2)

235
(455)
Forged
175
36
18

2.3
Flanged
20(3/4)
0.01 to 2.1
Steel
195
40
23
62
3.6

25(1)

(A105)
215

4.3
DF1-21HW
DF1-21LW

15(1/2)








Socket Weld
20(3/4)



160
36
18
62
1.4

25(1)









- 1 -


1. INTRODUCTION

Ball Float Steam Trap Model DF1-21 is equipped with a membrane capsule(“Dia-Thermo”)
and can be used up-to an operating pressure of 2.1 MPa.
The steam trap discharge the condensate automatically at a temperature 5℃/9 F(Dia-
Thermo H) or 15℃/27 F(Dia-Thermo L) below saturation temperature.
This manual contains INSTALLATION, TROUBLE SHOOTING and MAINTENANCE etc..
Never fail to read them to the end before using. 


2. DIMENSIONS AND SPECIFICATIONS







 

 
Size
Operating
Maximum
Material
Dimensions
Weight
(kg)
Model No.
Connection
mm
Pressure
Temperature
of
(mm)
 
(inch)
(MPa)
℃
( F)
Body
L
H1
H2
W
DF1
-21H
DF1
-21L

15(1/2)
  
85
36
18

1.0
Screwed
20(3/4)
  
100 40 23
62
1.2

25(1)
   
DF1-21HF
DF1-21LF

15(1/2)

235
(455)
Forged
175
36
18

2.3
Flanged
20(3/4)
0.01 to 2.1
Steel
195
40 23
62
3.6

25(1)

(A105)
215

4.3
DF1-21HW
DF1-21LW

15(1/2)
       
Socket Weld
20(3/4)
  
160
36
18
62
1.4

25(1)








1
- 1 -


1. INTRODUCTION

Ball Float Steam Trap Model DF1-21 is equipped with a membrane capsule(“Dia-Thermo”)
and can be used up-to an operating pressure of 2.1 MPa.
The steam trap discharge the condensate automatically at a temperature 5℃/9 F(Dia-
Thermo H) or 15℃/27 F(Dia-Thermo L) below saturation temperature.
This manual contains INSTALLATION, TROUBLE SHOOTING and MAINTENANCE etc..
Never fail to read them to the end before using. 


2. DIMENSIONS AND SPECIFICATIONS







 



Size
Operating
Maximum
Material
Dimensions
Weight
(kg)
Model No.
Connection
mm
Pressure
Temperature
of
(mm)
 
(inch)
(MPa)
℃
( F)
Body
L
H1
H2
W
DF1-21H
DF1-21L

15(1/2)
  
85
36
18

1.0
Screwed
20(3/4)
  
100 40 23
62
1.2

25(1)
   
DF1-21HF
DF1-21LF

15(1/2)

235
(455)
Forged
175
36
18

2.3
Flanged
20(3/4)
0.01 to 2.1
Steel
195
40 23
62
3.6

25(1)

(A105)
215

4.3
DF1-21HW
DF1-21LW

15(1/2)








Socket Weld
20(3/4)
  
160
36
18
62
1.4

25(1)
       
Balanced pressure thermostatic steam trap Model DF1-21 is equipped with a membrane
capsule(“Dia-Thermo”) and can be used up-to an operating pressure of 2.1 MPa.
5℃/9° F(Dia-

- 2 -


3. INSTALLATIONS

1) Install the trap according to the direction of the arrow on the body which
indicates the direction of flow.
2) This steam trap can be installed either horizontally and vertically
3) Make an adequate incline (about 1 degree) in the direction of the flow.
4) Do not thermal insulate the trap itself.
5) The trap has an integral strainer screen of 80 mesh,but for piping where the
dirt conditions are bad install Y-type strainer or dirt pocket before the
trap as shown on the diagram below.
6) It is requested to design the piping as in the diagram below .It will make
the trap trouble free and easy to maintain. It is also requested to install
the trap at the by-pass side.
7) For steam mains,make the size of branch lines 3/4" or 1".
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- 3 -

4. TROUBLESHOOTING

Sympton

Cause
Remedy
Intermittent
A.Normal.

Operation
Continuous discharge
A.Normal.

of condensate with
flash steam
Steam is leaking or
A.Over pressure.
A.Check operating conditions
blowing through
Reduce the inlet pressure or

change to another trap with

higher pressure capability.

B.Scales etc. lodged between
B.Disassemble the trap according
the Thermo Element(3) and
to Maintenance, Disassembling
the Valve Seat(4).
and Assembling (Clause 5).

Clean the Thermo Element(3)

and Valve Seat(4).

C.The Thermo Elemnt(3)
and/or
C.Disassemble the trap according
the Valve Seat(4) are worn
to Maintenance, Disassembling

or damaged.
and Assembling(Clause 5).


Replace The Thermo Element(3)


and/or the Valve Seat(4).
No discharge
A.Wrong installation (inlet/
A.Install the Steam Trap accord-

outlet)of the steam trap.
ing to Installations(Clause 3).

B.Closed upsteam valve.
B.Open it!

C.Clogged Screen(12).
C.Disassemble the trap according
to disassembling.
Clean the surface of the screen
(12).









 


3

- 4 -


5. MAINTENANCE


1. Untightten the Bolt(9) of the Cover(2)and remove the
Cover(2).
Now The “Dia-Thermo”- Element(3) can be taken out.
2. Untighten the Valve Seat(4) and unscrew it.Take the
Valve Seat(4), the Seeat Gasket(7),and the Screen(6)
out.
3. Clean the Body(1) and Screen(6).
If defected please replace it.
4. Check the Parts and replace worn or damaged ones.
5. Assemble the trap in the opposite way.
6.At first put in the Screen(6), then tighten the
Valve Seat(4).
7.Put the “Dia-Thermo” element on the Valve Seat(4)
and put the Stop Ring(5)into the Cover(2). Put a new
cover Gasket(8) on the Body(1) and tighten the cover
Bolts(9).















No.
Parts
Size
Shape
Clamp Torque
Tools
4
Valve Seat
17mm
Hexagon
220kgf
･
cm
Wrench
9
Bolt
13mm
Hexagon
180kgf
･
cm
Wrench
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Bolt
Gasket
Thermo
Elemrnt
Valve Seat
Gasket
Screen
Body
Cover
Stop Spring
4

- 5 -


6. CONSTRUCTION












(Flanged end)





(Screwed end)







(Socket Weld end)




  1.Body 
 2.Cover 
 3.Thermo Element(Dia-Thermo)
 4.Valve Seat 
5.Stop Spring 
 6.Screen 
7.Gasket 
8.Gasket 
  9.Bolt  
10.Name Plate
11.Rivet
12.Flange(*For only Flanged connection)
13.Pipe(*For only Flanged connection)
12.Coupling(*For only Socket Weld connection)



5

- 6 -


7. WARRANTY
7.1 Warranty period
The warranty period shall last 12 months from the date of product delivery.
7.2 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
7.3 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.
- 6 -


7. WARRANTY
7.1 Warranty period
The warranty period shall last 12 months from the date of product delivery.
7.2 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
7.3 Warranty limitation
The remedy available under the warranty shall not exceed the sales price of the
products delivered, for any cause whatsoever.
6

★
Guidance for reading special product name
○○○
-
○○
-
□
㻌
㻌
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

7

For any questions about the product that you purchased or about the details in this user’s
manual, please contact the following.
© 2017 MIYAWAKI INC.
This user’s manual may not be reproduced or copied in whole or in part, without the
written consent of MIYAWAKI INC.
Some special specifications of the product you have, may found to be different from the
ones in the user's manual. If you have any question, please contact MIYAWAKI, our
local authorized agent, or the place where you purchased.

INTERNATIONAL SALES DEPT.
2-1-30, Tagawakita, Yodogawa-ku, Osaka, 532-0021, Japan
Tel: [phone]
www.miyawaki.net e-mail: [e-mail]
EU Importer and Authorized representative:
MIYAWAKI GmbH
Birnbaumsmühle 65, 15234 Frankfurt (Oder), Germany
Tel: [phone]
www.miyawaki.net e-mail: [e-mail]
China Importer and Authorized representative:
MIYAWAKI WEST Co.,ltd
Room 1705, No.1, Building,No.311, Yanxin Road, Huishan Economic Development Zone,
Wuxi, Jiangsu, China
Tel: [phone]
www.miyawaki-inc.com.cn e-mail: [email protected]n
808062-02 2001
DF1