Yoshitake GP-2000 User manual

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Model GP-2000
PRESSURE REDUCING VALVE
Installation & Operation Manual
Please read this bulletin thoroughly before using the pressure reducing valve, so that you may
do so correctly and safely. Please carefully store this bulletin in a handy place.
―――――――――The following safety symbols are used in this manual. ――――――――
Warning
Caution
Contents
1. Features ····································································· 1
2. Specifications······························································· 1
3. Dimensions and Weights················································ 2
4. Operation···································································· 3
5. Nominal Size Selection Method
5.1 Specifications selection chart ······································ 7
5.2 Safety valve setting pressure chart······························· 7
5.3 Characteristics chart ················································· 7
5.4 Nominal size selection chart ······································· 8
5.5 Nominal size selection calculation formula····················· 9
6. Installation
6.1 Example of piping····················································· 9
6.2 Precautions during installation···································· 10
6.3 Installing accessories ··············································· 11
6.4 Sensing pipe connection method ································ 11
7. Operating Procedure
7.1 Precautions during operation ····································· 11
7.2Adjustment procedures············································· 12
8. Maintenance Procedure
8.1 Troubleshooting ······················································ 12
8.2 Precautions during maintenance and inspection ·············13
8.3 Disassembly··························································· 14
8.4 Precautions during reassembly··································· 14
8.5 Exploded drawing···················································· 15，16
After Sale Service
This symbol indicates a potentially hazardous situation that, if not
avoided, could result in death or serious injury.
This symbol indicates a hazardous situation that, if not avoided, may
result in minor or moderate injury. (“Caution” may also be used to
indicate other unsafe practices or risks of property damage.)

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1. Features
GP-2000 pressure reducing valves for steam are pilot-operated valves which can be used with
confidence for small to large flow rate, in a host of applications ranging from building utilities systems,
air-conditioning systems, and factory systems, etc.
2. Specifications
2.1 Models
Model Nominal pressure Connection Nominal size Pilot type
GP-2000 2.0 MPa Screwed 15-50A Integral mount
(or Remote mount)
Flanged 15-200A
1.0 MPa
GPP-2000 Pilot valve (common for screwed and flanged valves of all nominal sizes)
GPM-2000 Main valve (Screwed and flanged)
2.2 Specifications
Model GP-2000
Reduced pressure sensing
method (*1) External sensing
Connection JIS Rc Screw Flanged (JIS 20K RF) Flanged (JIS 10K FF)
Nominal size 15～50A 15～200A
Fluid Steam
Inlet pressure 0.1～2.0 MPa 0.1～1.0 MPa
Reduced pressure (*2) 0.02～0.15 MPa (Yellow)
0.1 ～1.4 MPa (Green) 0.02～0.15 MPa (Yellow) 0.1 ～0.85 MPa (Green)
85% or less of inlet pressure (gauge pressure)
Min. differential pressure 0.05 MPa
Max. pressure reducing ratio
20：1
Max. temperature 220℃
Valve seat leakage 0.01% or less of rated flow
Material
Body Ductile Cast iron
Valve Stainless steel
Valve seat Stainless steel
Diaphragm Stainless steel
Gasket Non asbestos
Body hydraulic test 4.0 MPa 2.0 MPa
* Optional valves (Cv value varies.) [15-100A]
(1) For reduced pressure sensing method, internal sensing method valves will be available
upon request.
(2) Valves with outlet pressure of 0.01~0.02 MPa will be available upon request.
(Inlet pressure: 0.06～0.5 MPa, Max. pressure reducing ratio: 50:1)
Caution
(1) Please collate with attached nameplate and specification of ordered model.
※Please consult factory in case they do not match each other.

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3. Dimensions and Weights
3-1. GP-2000 (Integral mount type)
•The structure differs for nominal sizes 50A to 100A.
(㎜)
Size Screw （JIS Ｒｃ） Flanged （JIS 20KRF）
d ＬＨＨ
１
ＡWeight
（kg）ＬＨＨ
１
ＡWeight
（kg）
15A Rc 1/2 150 398 170 200 14.0 146 398 170 200 15.5
20A Rc 3/4 155 398 170 200 14.0 146 398 170 200 16.0
25A Rc 1 160 404 175 226 18.5 156 404 175 226 21.0
32A Rc 1-1/4 190 434 192 226 21.5 176 434 192 226 24.0
40A Rc 1-1/2 190 434 192 226 21.5 196 434 192 226 24.5
50A Rc 2 220 498 216 276 33.0 222 498 216 276 36.0
65A ――― －
－ － ― ―――
282 552 251 352 64.5
80A ――― －
－ － ― ―――
302 572 264 352 71.5
100A ――― －
－ － ― ―――
342 658 321 401 111
125A ――― －
－ － ― ―――
400 658 321 401 115
150A ――― －
－ － ― ―――
465 814 414 502 234
200A ――― －
－ － ― ―――
469 814 414 502 242
* Different Length (L) and Weight values apply for JIS 10K FF.
3-2. GP-2000 (Remote mount type)
(Screw)
(Flanged)
(Screw)
(Flanged)

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• The structure differs for nominal sizes 50 to 100 .
Screw （JIS Ｒｃ） (㎜)
Size d ＬＨＨ
１
ＡE F Weight
（kg）
15A Rc 1/2 150 398 170 200 45 175 15.5
20A Rc 3/4 155 398 170 200 45 175 15.5
25A Rc 1 160 404 175 226 46 180 20.0
32A Rc 1-1/4 190 434 192 226 55 188 23.0
40A Rc 1-1/2 190 434 192 226 55 188 23.0
50A Rc 2 220 498 216 276 65 195 34.0
Flanged （JIS 20KRF）(㎜)
Size ＬＨＨ
１
ＡE F Weight
（kg）
15A 146 398 170 200 45 175 15.5
20A 146 398 170 200 45 175 15.5
25A 156 404 175 226 46 180 20.0
32A 176 434 192 226 55 188 23.0
40A 196 434 192 226 55 188 23.0
50A 222 498 216 276 65 195 34.0
65A 282 552 251 352 75 212 64.8
80A 302 572 264 352 80 223 71.3
100A 342 658 321 401 105 240 111
125A 400 658 321 401 130 240 115
150A 465 814 414 502 150 289 234
200A 469 814 414 502 150 289 242
* Different Length (L) and Weight values apply for JIS 10K FF.
3-3. GPP-2000 Remote mount type (Pilot valve)
3-3. GPM-2000 Remote mount type (Main valve)
(Screw) (Flanged)

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4. Operation
The pressure reducing valve reduces pressure by the throttling the valve. The valve is composed of
the main valve and main valve seat for throttling, and adjusting spring, diaphragm, pilot valve, and
piston for pressure sensing and activation.
No. Parts name
1 Body
6 Main Valve
7 Main Valve Seat
12 Main Diaphragm
13 Main Valve Spring
15 Screen
17 Pilot Valve
18 Pilot Valve Seat
23 Pilot Diaphragm
24 Spring
27 djusting Screw
34,35,36 Pipe ,B,C
12-1 Main diaphragm chamber
23-1 Pilot diaphragm chamber
56 Reduced press. sensing port
(1) When the pressure reducing valve is mounted correctly, releasing the compression of adjusting
spring [24] allows main valve spring [13] and pilot valve spring [19] to close main valve [6]
and pilot valve [17]. Slowly open the gate valve and allow the high pressure fluid to flow in.
Inlet pressure is applied to the upside of the main valve. High pressure fluid passes through
screen [15] to also apply inlet pressure to the downside of the pilot valve. (Fig. 1)
Fig. 1

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(2) Turing adjusting screw [27] clockwise compresses the spring, which flexes pilot diaphragm
[23] to open the pilot valve. The fluid passing through pilot valve [17] and pilot valve seat
[18] enters the main diaphragm chamber via pipes A [34] and C [36]. This fluid also flows
to the reduced side of the body [1] through pipe B [35] and the orifice of joint B [31] that
connects to the body. (Fig. 2)
Fig. 2
(3) When the flow rate at the pilot valve exceeds the flow rate at the orifice, operating pressure
in the main diaphragm chamber raised and overrides the pressure on the upside of the main
valve and the load of main valve spring [13] to open the main valve. The fluid then begins to
flow from the inlet side. (Fig. 3)
Fig. 3

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(4) Reduced pressure is led to the pilot diaphragm chamber [23]-1 via the sensing pipe and
reduced pressure sensing port [56]. The pilot diaphragm receives the reduced pressure to be
balanced with the spring load. The pilot valve travel is controlled by the spring load and
pressure applied to the pilot diaphragm due to variations in reduced pressure. This changes
the flow rate of fluid to the main diaphragm chamber, which controls the main valve travel to
obtain appropriate reduced pressure. (Fig. 4)
Fig. 4
(5) When the load on the reduced side is released, pressure in the pilot diaphragm chamber raises
to close the pilot valve. Operating pressure in the main diaphragm chamber is released to the
body via the orifice, and the main valve spring presses the main valve to close. (Fig. 5)
Fig. 5

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5. Nominal Size Selection Method
5.1 Pressure reducing valve specification selection chart
Refer to the above selection chart to select
the most appropriate pressure reducing
valve. Find the point of intersection of
inlet pressure (P1) and reduced pressure
(P2). When the point of intersection is
within range (A), reduce pressure in two
stages. When within range (C), maximum
performance cannot be obtained. When
reducing pressure in two stages, maximize
the distance between the valves (at least 3
m).
5.2 Safety valve setting pressure chart
Determine the reduced pressure of
pressure reducing valve. Find the
intersection point (A) with the chart
curve. Next, find point (B) by
proceeds horizontally from point (A)
to the left until the ‘Setting pressure
of safety valve’ axis. The setting
pressure of the safety valve should be
higher than the pressure of the point
(B).
5.3 Characteristics chart
(1) Flow rate characteristics chart
•Shut-off pressure raise : 0.02 MPa or less
•Offset : 10% or less of setting pressure
(Minimum value: 0.02MPa)
(2) Pressure characteristics chart
Reduced pressure is set to 0.14 MPa
when inlet pressure is 1.75 MPa. The
chart indicates a variation in reduced
pressure when the inlet pressure is
changed from 0.2 to 2.0 MPa.

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5.4 Nominal size selection chart
For example, take a pressure reducing valve whose inlet pressure (P1) is 0.6 MPa, reduced
pressure (P2) 0.4 MPa, flow rate 600 kg/h. When determining the nominal size, find the point of
intersection (A) of inlet pressure 0.6 MPa and reduced pressure 0.4 MPa. Vertically proceed from
point (A) to come across the flow rate 600 kg/h, and regard this point as (B). Point (B) is
between nominal sizes 20A and 25A. Select the larger nominal size (in this example, nominal size
25A)

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5.5 Nominal size selection calculation formula
The appropriate nominal size can be calculated by obtaining the Cv value for the operating
conditions in question, as shown below.
•Cv value calculation formula
•Rated Cv value table
Nominal size 15A 20A 25A 32A 40A 50A 65A 80A 100A 125A 150A 200A
Rated Cv value 5 7.2 10.9 14.3 18.8 32 54 70 108 112 225 234
0.01 MPa set 2.5 3.6 5.4 7.1 9.4 16 27 35 54 ----- ----- -----
*Please consults factory for internal sensing method valves.
[Flow rate calculation example of GP-2000 pressure reducing valve]
The flow rate of the pressure reducing valve is calculated under the following conditions:
Nominal size 15A, saturated steam, Inlet pressure of 0.6 MPa, Reduced pressure of 0.4
MPa.
P
1=0.7 [MPa A],
P
2=0.5 [MPa A], you can find that Cv value of 15A is 5 from the chart.
The following formula is established.
2
)7.0(
)5.0(
1
2
=
>= P P
k
PPPCv
W)(138
21 +∆
=
WCv P P P
k
=+135
1 2 . ( )∆
1
)5.07.0(2.05138 +×××
=
hkg /338
=
■Secure a safety rate of 80 to 90%
6. Installation
6.1 Example of piping
W: Max. steam flow rate [kg/h]
P1: Inlet pressure [MPa･A]
P2: Reduced pressure [MPa･A]
ΔP: P1－P2 [MPa]
k: 1+0.0013 ×{super-heated steam
temp.[℃]－saturated steam
temp.[℃]}
2
P
P
1
2 >
)PP(P138
Wk
Cv
21 +∆
=
2
P
P
1
2 <
1
120P
Wk
Cv =

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6.2 Precautions during installation
Warning
(1) Because of heavy weight, hold the valve with lifting equipment while piping. Refer to
“3. Dimensions and weights” table for the valve weight.
※Failure to do so may result in injury due to dropping the valve.
(2) In case installing safety valve as safety device at outlet side, joint relief pipe at outlet
of safety valve and guide it to safety place where steam can relief out.
※Failure to do so may result in burns.
Caution
(1) Do not disassemble the valve unreasonably.
※Disassembling the valve at your discretion may affect the original performance.
(2) Remove foreign matter and scales from the lines before connecting the valve.
※Failure to do so may prevent the valve from functioning correctly.
(3) Install a strainer (Recommendation: 80-100mesh or close) at the valve inlet side.
※Failure to do so may hamper correct pressure control, which affects the original
performance.
(4) Install a safety valve at the valve outlet sides as safety device for equipment.
※Failure to do so prevents problem identification, resulting in equipment damage.
(5) Install a pressure gauge at both the inlet and outlet sides of the valve.
※Failure to do so may hamper correct pressure adjustment.
(6) Install a steam trap to the inlet sides of the valve to prevent drainage problems.
※Failure to do so may result in drainage problem, affecting the original performance.
(7) When installing quick open and close valves, such as a solenoid valve, install it at
inlet side as much as possible, and secure at least 3 m from the valve.
※Failure to do so may result in malfunction or drastically shortened service life.
(8) When pressure reducing in two stages, secure at least 3 m between the valves.
※Failure to do so may result in malfunction, affecting the original performance.
(9) Install the valve in proper direction of the fluid flow.
※Failure to do so may affect the original performance.
(10) Do not apply excessive load, torque or vibration to the valve.
※Doing so may result in malfunction or drastically shortened service life.
(1) Install the valve perpendicularly to horizontal lines.
(2) Provide the by-pass line. (See 6.1 Example of piping)
(3) When the pressure reducing ratio is large, install a reducer to keep the flow velocity in the pipe
below 30 m/s or less.
(4) Provide space on the top and bottom of the valve so that the valve can be easily disassembled
and inspected. (See Fig.6) (mm)
Fig.6
Nomina
l size A B C
15A 300 340 180
20A
25A 350 200
32A 320 380
220
40A
50A 360 430
65A 380 370 260
80A 390 390
100A 410 470 280
125A
150A 620 740 340
200A

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6.3 Installing accessories
Warning
(1) When installing the pressure reducing valve, be sure to connect the provided sensing
pipe and joint.
※Unless the sensing pipe is connected, the valve will not operate. Further, steam may
blow off, resulting burns.
6.4 Sensing pipe connection method
Fig.7
7. Operating Procedure
7.1 Precautions during operation
Warning
(1) Do not touch the valve directly with bare hands.
※Doing so may result in burns.
(2) Before flow the steam in pipe line, make sure steam can flow without any dangerous at
the end of pipe line and pipe line is connected tightly.
※In case steam blow off, it may result in burns.
Caution
(1)Close the stop valves before and after the pressure reducing valve, and remove all
foreign matter and scales via the by-pass line before operation. And, open each stop
valve slowly.
※Failure to do so may prevent the valve from functioning correctly. And, It may cause
hunting, water hammer, etc., resulting in damage to the valve and other equipment
when the stop valve is opened quickly.
(2)Secondary pressure at by-pass line must be lower than set pressure.
※Safety valve blows in case secondary pressure at by-pass line becomes higher than
set pressure.
(3)When adjusting pressure, slowly turn the adjusting screw
※Incorrect adjustment may cause hunting, water hammer, etc., resulting in damage to
the valve and other equipment.
(4)Remove condensate completely from the line, and close the stop valves before and
after the valve when not using it for long periods of times.
※Rust generated in the valves and lines may cause malfunction.
Connect the provided sensing pipe (φ8-2m)
and joint ( φ8-R1/4) as shown in the
illustration on the left.
1.Wind sealing tapes around the joint and insert
the joint into the pressure sensing side.
2.Fully insert the sensing pipe into the valve
and the pressure sensing side joint. Tighten
the cap nut until it can no longer be rotated
manually, and then turn the cap nut about one
and quarter times with a tool. Note that the
sensing pipe must be connected so that the
valve side is higher than the pressure sensing
side.

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7.2 Adjustment
Follow the steps below, and slowly turn the adjusting screw to set pressure. Incorrect adjustment
may cause hunting, water hammer, etc., resulting in damage to the valve and other equipment. ( See
6.1 Example of piping .)
(1) Check that all stop valves (V
1
to V
7
) are closed.
(2) Open the stop valve (V
6
) for the trap installed before the pressure reducing valve.
(3) Open the stop valve (V
3
) and adjust the valve travel of the by-pass line glove valve (V
5
).
Taking sufficient time not to blow the safety valve, blow off the fluid to remove foreign matter.
After blowing, close the by-pass line glove valve.
(4) Loosen lock nut [28] and turn adjusting screw [27] counterclockwise to release spring [24] (no
compression).
(5) Open the sensing pipe stop valve (V
4
).
(6) Open the stop valve (V
2
) at the outlet side of the pressure reducing valve. Adjust the travel of
the stop valve (V
3
) so that a little fluid flows.
(7) Confirm that the condensation is discharged from the inside of the pressure reducing valve,
and slowly open the stop valve (V
1
) on the inlet side.
(8) Slowly turn the adjusting screw clockwise while observing the pressure gauge on the outlet
side, and set the desired pressure.
(9) When the entire system has stabilized, conduct fine adjustment as necessary.
(10) After adjustment, tighten the lock nut.
(11) Check for leakage. Conduct re-tightening as necessary.
8. Maintenance Procedure
8.1 Troubleshooting
Problem Cause Solution
Pressure does not
reach the desired
value.
1．Incorrect pressure is being used.
2．Screen [15] is clogged.
3．Main diaphragm [12] is damaged
4．Orifice of tee [33] is clogged.
5．
Pilot valve [17] and pilot valve seat
[18] are clogged with foreign matter,
scales, etc.
6．Sensing pipe is clogged.
7．Nominal size is too small for the
specifications.
8．Pressure is not adjusted correctly.
9．Wrong installation with tee [33]
10．Strainer installed before pressure
reducing valve is clogged.
11．Pressure gauge is faulty.
1．Correct the pressure.
2．Disassemble and clean the screen.
3．Remove pipe C [36] at elbow [32]
and open the by-pass valve. If the
fluid runs out from elbow, replace the
main diaphragm.
4．Remove the orifice and clean it.
5．
Disassemble pilot valve assembly, and
clean it.
6．Disassemble and clean it.
7．Change the nominal size
appro-priately.
8．Observe the adjustment procedures
and readjust pressure.
9．Install the tee whose slit should be
faced upward (Refer to Fig.10).
10．Disassemble and clean it.
11．Replace it.
Reduced pressure
raises above than
the specified value.
1．Foreign matter exists between main
valve [11] and main valve seat
[12], or scratches exist.
1．Disassemble and remove the foreign
matter. When any scratches are
identified, lap the main valve and
main valve seat. Change the parts if
scratches still exist after lapping.

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Problem Cause Solution
Reduced pressure
raises above than
the specified value.
2．Foreign matter exists between
pilot valve and pilot valve seat, or
scratches exist.
3．Orifice of tee is clogged.
4．Reduced pressure is not adjusted
correctly.
5．Trap is not provided for dead-end
line.
6．By-pass valve is leaking.
7．Pilot diaphragm [23] is damaged.
2．Disassemble the pilot valve
as-sembly, and clean or replace it.
3．Remove the orifice and clean it.
4．Observe the adjustment steps and
readjust pressure.
5．Install a trap.
6．Repair or replace it.
7．Replace the pilot diaphragm.
Abnormal noise is
heard.
1．Nominal size is too large for the
specifications.
2．Pressure reducing ratio is too large.
3．Drainage problem is caused.
4．An abrupt OPEN/CLOSE valve is
located too close to the pressure
reducing valve.
5．Outlet pipe is too small.
1．Change the nominal size
appro-priately.
2．Reduce pressure in two stages.
3．Install a trap.
4．Allow as much as possible between
the valves.
5．Select a pipe size that will produce a
flow velocity of 30m/s or less.
Foreign matter and scales in a pipe may cause most of problems of pressure reducing valve. Be
careful sufficiently to foreign matter in a pipe.
 Phenomenon alike valve trouble may happen by fault of pressure gauge, fluid leakage from
by-pass valve, forgetting to close the by-pass valve, clogging strainer, and etc. First, check the
said particulars before above troubleshooting.
Consult factory when cannot make a judgement whether parts need replacement or not.
8.2 Precautions during maintenance and inspection
Warning
(1)Completely discharge internal pressure from the valves, lines, and equipment, and cool
the valve down to a level where you can touch it with bare hands before disassembly
and inspection.
※Failure to do so may result in injury or burns due to residual pressure or spillage
around the valve.
Caution
(1)In order to maintain original performance and function, examine daily and personal
inspection. And, periodical inspection must be examined according to the regulations of
every kind.
※For general users, request to specialized dealer or manufacture.
(2)Pressure reducing valve shall be disassembled and inspected by qualified person or
manufacture.
※Request the treatment to specialized dealer or manufacture in case of any problems.
(3)While disassembly, drain flow out from the valve, so catch it by container. And release
steam completely before disassembling.
※In case of no container for drain, it makes dirty surrounding the valve.
(4)Close the stop valves before and after the pressure reducing valve, and remove all
foreign matter and scales via the by-pass line before operation.
※Failure to do so may prevent the valve from functioning correctly.
(5)When adjusting pressure, slowly turn the adjusting screw.
※Incorrect adjustment may cause hunting, water hammer, etc., resulting in damage to
the valve and other equipment.

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(6)Remove condensate completely from the line, and close the stop valves before and
after the valve when not using it for long periods of times.
※Rust generated in the valves and lines may cause malfunction.
(7)In case of no operation for a long period of time, perform operating exam before start
operation again.
※Request the treatment to specialized dealer or manufacture in case of any problems.
8.3 Disassembly
Be sure that the stop valves at inlet and outlet side of pressure reducing valve is closed and all internal
pressure and condensate have discharged before disassembling the valve.
(1) Pilot valve
1. Slightly loosen lock nut [28] and turn adjusting screw [27] counterclockwise to release spring
[24] (no compression).
2. Remove bolt [37] of spring chamber [3]. Remove the spring chamber, spring, top spring plate
[25], bottom spring plate [26], and pilot diaphragm [23].
3. Remove pilot valve seat [18] (hexagonal section of the center of pilot body [2]) using a ring
spanner or socket wrench (nominal size 22), and remove the entire pilot valve assembly.
(2) Main valve (15-125A)
1. Remove pipe A [34] at joint A [30] or tee [33].
2. For nominal sizes 15A to 40A, remove bolt [38] of pilot body [2]. Dismount the pilot body from the
body [1]. And remove spring plate [14], screen [15], main valve spring [13], and main valve [6].
For nominal sizes 50A to 125A, remove bolt [44] of spacer [54] and remove the spacer from the
main body [1], main valve spring [13], and entire main valve ([6], [9], [50], and [51]) (for nominal
size 50A, main valve spring [13], and main valve [6]).
(3) Main diaphragm
1. Remove pipe C [36] at tee [33].
2. Remove bolt [41] of bottom dia. case [5]. Dismount the bottom dia. case, main diaphragm
[12], retainer [11], and spindle [9] (adapter [52] and retainer [11] for nominal sizes 65A to 125
A).
8.4 Precautions during disassembly
Caution
(1) Check that there is no damage and scratches on the main valve, main valve seat, pilot
valve, and pilot valve seat.
※Any scratches at sealing surface lead to increase in secondary pressure. When any
scratches are identified at main valve and seat, polish them away. And, change the
parts if scratches still exist after polishing. Also, in case any scratches are identified
at pilot valve and pilot valve seat, change into pilot valve assembly.
(2) Move the sliding section (pilot valve, piston, etc.) two to three times and confirm they
move smoothly.
※If the sliding parts do not move correctly, it may cause failure problems. (Working not
correctly).
(3) Replace gaskets with new ones when reassembling.
※If the gasket is used for a long time, it may cause steam leakage problem.
(4) Assemble in the reverse order of Disassembly. And tighten the bolts evenly.
※Assemble the valve due to the order. Failure to do so may lead to not assemble
correctly. And if the hexagon bolts are not screwed correctly, it may cause steam
leakage problem.

■EPDT-014f■
-
15
-
8.5 Exploded drawing
For size 65A to 200A, refer to P.16

■EPDT-014f■
-
16
-
65A to 200A
Parts within the flame are consumable. Please contact us for purchase of these consumable parts.
Note (*1): Apply a liquid sealant for heat and steam resistant (Recommendation: SOLVEST
１１０) to the sealing surface of the diaphragm bottom and the top cover.
(*2): For size 15A to 125A, attach the tee with turning upward the slit part. In addition,
for size 150A and 200A, it is equipped with an orifice between tee and pipe B and
pipe C respectively. Therefore, direction of tee is arbitrary. (Refer to following
figure.)
Size 15 to 125
(Upward the slit part)
Size 150 ,200
(Please confirm the
orifice is attached to
Pipe B and C.)