MIYAWAKI AG29 User manual

BALL FLOAT AIR AND GAS TRAP
AG29/AGH29/AGU29
USER'S MANUAL

SAFETY GUIDE
The models AG29, AGH29 and AGU29 are mechanical ball float air and
gas traps.
In order to get maximum benefit from these products, be sure to read
this manual before installing them.
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.
Table of Contents
1 SPECIFICATIONS AND MARKINGS
1
2 CONSTRUCTION DETAILS
3
3 INSTALLATION
5
4 OPERATION
6
5 MAINTENANCE
7
6TROUBLESHOOTING
9
7 WARRANTY
10
8 SERIAL NUMBER (S. No.) DESIGNATION
11
9 GUIDANCE FOR READING SPECIAL PRODUCT
NAME
12

1
1SPECIFICATIONS AND MARKINGS
WARNING
Be sure not to use this product at higher pressures than the specified maximum
allowable pressure (PMA) or at temperatures higher than the specified maximum
allowable temperature (TMA).
Check each item to avoid misuse of the product.
1) Max. allowable pressure (PMA):
AG29 - 1.0 MPa (145 psig)
AGH29 and AGU29 - 3.0 MPa (435 psig)
AGH29-45 and AGU29-45 - 4.5 MPa (652 psig)
2) Max. allowable temperature (TMA):
AG29 - 300 °C (572 °F)
AGH29 and AGU29 - 400 °C (752 °F)
3) Maximum differential pressure (⊿PMX):
AG29-3, AGH29-3, AGU29-3 - 0.3 MPa (43 psig)
AG29-10, AGH29-10, AGU29-10 - 1.0 MPa (145 psig)
AGU29-16 - 1.6 MPa (232 psig)
AGH29-20 - 2.0 MPa (290 psig)
AGH29-30 - 3.0 MPa (435 psig)
AGH29-45 and AGU29-45 - 4.5 MPa (652 psig)
4) Max. operating temperature (TMO):
AG29 - 300 °C (572 °F)
AGH29 and AGU29 - 400 °C (752 °F)
5) Size:
AG29:15 mm – 25 mm (½” - 1”)
AGH29 and AGU29: 15 mm – 50 mm (½” - 2“)
AGH29W and AGU29W: 15 mm – 25 mm (½“ - 1“)
6) Year of production: The two leftmost digits in the four-digit or nine-digit “S. No.” are
the last two digits of the year of production.
7) Flow direction: Shown by an arrow

2
8) Body material: AG29 –Ductile cast iron FCD450
AGH29 –Cast steel SCPH2
AGU29 –Stainless steel SCS13A
9) Model: Showing the product model name
⚫Some pictures and illustrations in this manual are examples of AG29 models. For more details regarding
dimensions and other specifications, please refer to the catalog.
The models AGH29 and AGU29 fully comply with the requirements of the European Pressure Equipment
Directive 2014/68/EU. They are classified according to Article 13 and Annex II of the PED by category I
of the Fluid Group 2. The CE marking is affixed to the products.
The models AG29 fully comply with the requirements of the European Pressure Equipment Directive
2014/68/EU. They are classified according to Article 4, Section 3 of the PED, which does not allow to
bear the CE marking.

3
2CONSTRUCTION DETAILS
AG29:
AGH29:
AGH29W:

4
1.
Body
12.
Cover Bolt
24.
Bolt
2.
Cover
13.
Body Pin
33.
Pipe
3.
Float
14.
Plug
34.
Flange (AG29/AGH29/AGU29)
5.
Holder
17.
Valve Seat
34.
Coupling (AGH29W/AGU29W)
6.
Valve
18.
Bush
35.
Name Plate
7.
Pin
19.
Cover Gasket
36.
Rivet
8.
Lever
20.
Holder Gasket
37.
Flange (AGH29/AGU29)
9.
Collar
21.
Nut
38.
Spacer
10.
Washer
22.
Pin
39.
Cover Plug (AGH29/AGH29W)
11.
Holder Bolt
23.
Stopper
AGU29:
AGU29W:

5
3INSTALLATION
WARNING
Pay very careful attention when working in hazardous environments. There is a risk
of explosion and the possibility of dangerous gases leaking. Always check whether
the pipeline contains flammable, high pressure or high temperature materials
before starting to work.
⚫Make sure that isolation valves are installed on both the upstream and downstream
lines.
CAUTION
Before installing the product, open both isolation valves and the bypass valve, if
one exists, to blow out any debris or dirt inside the pipeline. After blowing out the
line, before starting to work, close the isolation valves and allow time for the
temperature to drop to a safe working temperature.
When installing the product, be sure to leave clearance for maintaining it.
1) Remove the dustproof seals covering both connections.
※Products shipped in plastic bags may not have dustproof seals.
2) Check the flow direction indicated on the side of the body.
3) The Models AG29, AGH29 and AGU29 must be installed horizontally. Be sure not to
install the products upside-down in a horizontal line, as it will cause the trap to
malfunction.
4) Never confuse inlet with outlet.
5) Install the trap at the lowest pointof the air or gasusing equipment. Be sure to maintain
a slight slope of the pipe, so that any condensate will flow smoothly to the trap.
6) Make sure, that a pressure-balancing line will be piped between the air trap and the
equipment which will be drained.
Upstream
line
Downstream
line
Pressure-balancing
lines
Clearance for
maintenance:
More than
210 mm
Top label

6
4OPERATION
CAUTION
Before starting operation, open the bypass valve or blow valve completely and blow
off the scale in the piping.
4.1 Operation procedure
1) After blowing off the scale from the piping, close the bypass valve or blow valve.
2) Open the stop valve on the air trap outlet side.
3) Open the stop valve on the air trap inlet side.
4) Open the stop valve of the pressure-balancing line of the air trap.
4.2 Stop procedure
1) Close the stop valve on the air trap inlet side.
2) Close the stop valve of the pressure-balancing line of the air trap.
3) Close the stop valve on the air trap outlet side.
* When stopping for a long time, completely drain the condensate from the piping and air
trap and close the valves before and after the air trap.

7
5MAINTENANCE
WARNING
⚫Before removing the air trap from the pipe or disassembling it, be sure to close
the isolation valves. Then, release the residual pressure from the trap body
(make sure that the pressure in the air trap body is equal to the atmospheric
pressure). After it has fully cooled down (after the temperature of the air trap
body has reached ambient temperature), confirm for safe conditions and then
begin to work.
⚫Even when the isolation valves are closed, there may be residual internal
pressure due to leaks from the isolation valves. Therefore, be very careful.
CAUTION
⚫When replacing parts, make sure the replacement parts are supplied by
MIYAWAKI.
The performance of air traps deteriorates gradually over time due to wear, corrosion or
dirt accumulating around the valve and the valve seat. Please conduct periodic diagnosis
of traps in order to keep the equipment working well.
5.1 Repairs
When a trap fails, it is necessary to clean the internal parts and to replace damaged parts.
Take the failed trap apart following the steps below.
5.1.1 Disassembling the trap
1) Loosen the cover bolts (12). Remove all inner parts together with the cover (2).
2) Firm the cover (2) with a vise and unscrew the holder bolts (11). Then you can take off the valve
unit.
3) Dismantle the pin (13) and take out the pin (7).
4) Now take off the lever (8) and the valve (6).
5) Firm the lever (8) with a vise and unscrew the nut (21). Now the float (3) will come apart.
After inspection of each part and cleaning, assemble in the opposite way of
disassembling.
CAUTION
Clean the body (1) and cover (2) with care not to damage the sealing surfaces.
Scratches on the sealing surfaces may cause leakage.

8
Torque table
Model
Parts
Tools
Size
Torque
AG29
Holder Bolt (11)
Hexagon Key
8 mm (0.32”)
50 N･m
AG29
Cover Bolt (12)
Torque Wrench
19 mm (0.75”)
50 N･m
AGH29
Holder Bolt (11)
Hexagon Key
8 mm (0.32”)
50 N･m
AGH29
Cover Bolt (12)
Torque Wrench
24 mm (0.95”)
100 N･m
AGU29
Holder Bolt (11)
Hexagon Key
8 mm (0.32”)
50 N･m
AGU29
Cover Bolt (12)
Torque Wrench
24 mm (0.95”)
80 N･m
CAUTION
When reassembling always replace the gaskets (19) and (20) with new ones. Tighten
the holder bolts (11) and cover bolts (12) evenly crosswise.
14.Body Plug
1.Body
Pressure-Balancing Line
Float Valve Unit
19.Cover Gasket
39.Plug
20.Holder
Gasket
2.Cover
39.Cover Plug
(AGH29/AGH29W)
12.Cover Bolt
11.Holder
Bolt

9
6TROUBLESHOOTING
Problem
Possible cause
Solution
Air leaks or blows through.
Scale and/or dirt lodged
between valve (6) and valve
seat (17).
Remove scale or dirt.
Worn valve (6) and/or valve
seat (17).
Replace the valve unit.
The cover gasket (19) and/or
holder gasket (20) are worn.
Replace the gaskets.
The cover bolts (12) are loose
or uneven tightened.
Retighten the cover bolts (12).
Condensate logging and/or
no discharge
The valve seat (17) is
clogged.
Clean the valve seat (17).
The float (3) is damaged or
filled up with water.
Replace the float (3).
The inlet valve is closed.
Open the inlet valve.
The strainer at the inlet pipe
side is clogged.
Clean the strainer.
The operating pressure is too
high.
Change the operating
pressure or select a trap for
higher pressure.
The capacity of the trap is too
low.
Check the operating
conditions and select a trap
with higher capacity.
Scale and/or dirt lodged
between valve (6) and valve
seat (17).
Clean the valve (6) and the
valve seat (17).
Condensate cannot flow
naturally into the trap.
Change the piping.
Lack of differential pressure.
Check the operating
conditions.
Wrong or no pressure-
balancing pipe line
Check the piping and correct if
necessary.

10
7WARRANTY
7.1 Warranty period
The warranty period is 18 months after shipment or 12 months after installation, whichever
occurs first.
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 MIYAWAKI’s, or a disallowed
use environment
4) When a repair or modification has been performed by anyone other than MIYAWAKI
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
MIYAWAKI’s 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.

11
8SERIAL NUMBER (S. No.) DESIGNATION
The following 4-digit or 9-digit “S. No.” is displayed on the product.
●For 4-digit display
S.No. □□□□
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. □□□□□□□□□
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
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
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
1 7 1 1 2 C 0 2 0 → Jan., 2017
29X05M050 → Oct., 2029

12
9GUIDANCE FOR READING A SPECIAL PRODUCT
NAME
〇〇〇-○○-□
Special symbol:
The symbol applies only to
special products
(Please refer to table 1 for details)
Model symbol:
Product model name
Table 1 Symbol description
Suffix
Special contents
A
Trap for high-pressure gas installed property (only for Gas Trap)
C
Blow valve attached
K
Change of gasket
L
Special face to face dimension
M
Change of parts material
P, T
Change of operating pressure, temperature, condensate capacity, etc.
R
Change of screen mesh
V
Change of air vent
X
Other than mentioned above or complex of special contents above

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⚫外観及び仕様などは、製品改良のため予告なしに一部変更させて頂くことがあります
。
⚫© 2022 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 may be 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 company where you purchased the product.
⚫In the interest of the development and improvement of our products, MIYAWAKI Inc.
reserves the right to change the specification of the products without prior notice.
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808041-02 2201
AG29/AGH29/AGU29