Yoshitake BFV-1S User manual

■EPDT-383■
Model BFV-1S Butterfly Valve
Product Manual
Thank you very much for choosing the Yoshitake’s product. To ensure the correct and
safe use of the product, please read this manual before use. This manual shall be kept with
care for future references.
The symbols used in this manual have the following meanings.
⚠Warning
This symbol indicates a potentially hazardous situation that, if not avoided,
could result in death or serious injury.
⚠Caution
This symbol indicates a hazardous situation that, if not avoided, may result in
minor or moderate injury or may result in only property damage.
Contents
1. Specifications...................................................................................... 1
2. Structure and dimensions.................................................................2
2.1. Structure and dimensions of 50-150A.......................................2
2.2. Structure and dimensions of 200-300A ...........................................3
2.3. Handle installation ........................................................................ 4
3. Installation........................................................................................... 4
3.1. Cautions for installation ............................................................... 4
4. Operation............................................................................................. 5
4.1. Warnings and cautions for product usage ................................5
5. Maintenance and inspection.............................................................5
5.1. Warnings and cautions for maintenance and inspection........5
5.2. Periodic inspection........................................................................6
5.3. Troubleshooting............................................................................. 6
5.4. Cautions and procedures for seat replacement....................... 6
6. Disposal............................................................................................... 6
Warranty Information

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■EPDT-383■
1. Specifications
Model
BFV-1S
Nominal size
50-150A (Lever-operated), 200-300A (Gear-operated)
Application
Steam, air, water, oil and other non-dangerous fluid
Max. pressure
Max. temperature
According to the Pressure-Temperature rating
Material
Body
Stainless steel
Disc
Stainless steel
Seat
PTFE
Connection
Wafer (Applicable flange standards: JIS 10K,
ANSI 150lb and EN PN16)
Features
⚫The valve has double-eccentric structure with
minimal seat wear.
⚫Pneumatic actuator KA and electric actuator DA are
mountable (50 to 150A)
Pressure-Temperature Rating
⚠Caution
Confirm that the indications on the nameplate correspond with the specifications of ordered
product.
*If they are different, do not use the product and contact us.
Use the valve within this range.

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■EPDT-383■
2. Structure and dimensions
2.1. Structure and dimensions of 50-150A
No.
Part name
Q’ty
No.
Part name
Q’ty
1
Body
1
9
Retainer Bolt
1 set
2
Seat Retainer
1
10
Bolt
2
3
Disc
1
11
But
2
4
Seat
1
12
Taper Pins
1 set
5
Stem
1
13
Plug
1
6
Bearing
1
14
Name Plate
1
7
Gland Packing
1 set
15
Indicator Plate
1
8
Gland
1
16
Lever Handle*
1
*The lever handle [16] is not attached when shipped.
(mm)
Size
d
L
L1
H
H1
H2
D
F
C
Weight
(kg)
JIS 10K
EN PN16
ANSI 150lb
50
50
43
18
212
72
137
96
210
120
125
120.5
3.5
65
59
49
22
227
80
152
119
210
140
145
139.5
4.5
80
72
49
22
237
87
162
128
210
150
160
152.5
5
100
96
54
23
252
102
177
158
210
175
180
190.5
7
125
120
56
24
273
120
195
186
250
210
210
216
9
150
142
56
24
295
132
217
216
250
240
240
241.5
12

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■EPDT-383■
2.2.Structure and dimensions of 200-300A
No.
Part name
Q’ty
No.
Part name
Q’ty
1
Body
1
9
Retainer Bolt
1 set
2
Seat Retainer
1
10
Bolt
2
3
Disc
1
11
But
2
4
Seat
1
12
Taper Pins
1 set
5
Stem
1
13
Plug
1
6
Bearing
1
14
Name Plate
1
7
Gland Packing
1 set
15
Gearbox
1
8
Gland
1
16
Handwheel*
1
*The lever handle [16] is not attached when shipped.
(mm)
Size
d
L
L1
H
H1
H2
H3
D
F
J
K
W
C
Weight
(kg)
JIS
10K
EN
PN16
ANSI
150lb
200
190
64
27
411
167
245
35
265
210
53
57
260
290
295
298.5
24
250
238
71
32
490
205
298
42
320
210
66
77
300
355
355
362
40
300
282
81
36
527
245
335
42
378
210
66
77
300
400
410
432
55

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■EPDT-383■
2.3. Handle installation
50-150A
Attach the handle with its tip pointing at the “SHUT” position, and fix it with a flat
head screw.
200-300A
Align the holes of the handle and the shaft. Insert the pin and hit it with a
hammer to fix them.
3. Installation
3.1. Cautions for installation
⚠Caution
(1) Install the valve so that the directions of the flow and the arrow shown on the product
match.
(2) Do not disassemble the product unless it is necessary.
*Disassembly may prevent the product from functioning properly.
(3) Use sheet gaskets when connecting the valve to pipes.
*Using other types of gasket may cause fluid leak.
(4) Connect the product firmly so that the fluid will not leak.
*If connection is not firm, fluid might leak by vibration. Hot fluid may cause burn.
*Tighten the bolts uniformly in diagonal order.
(5) Connect the product so that it is not subject to excessive load, bending and vibration.
*They may seriously shorten the lifetime of the product.
(6) If freezing is possible, take antifreeze measures such as draining or insulation.
*The frozen fluid may damage the product.
SHUT
OPEN
Handle
Flat head screw
Shaft
Pin
Handle

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■EPDT-383■
4. Operation
4.1. Warnings and cautions for product usage
⚠Warning
(1) Before letting the fluid into the product, be sure that there will be no possibility of
danger if fluid flows into the ends of piping, and that the product is firmly connected.
*If the fluid flows out from the pipe ends or connection part, the surroundings will get
dirty. High temperature fluids may cause burn injury.
(2) When using with a high temperature fluid, do not touch the product with your bare
hands.
*It could result in burn injury.
⚠Caution
(3) When applying the fluid into the valve, operate the valve slowly to prevent water
hammer and condensate problem.
*Valves, fitting or other equipment may be damaged by water hammer or
condensate problem if the valve is opened rapidly.
5. Maintenance and inspection
5.1. Warnings and cautions for maintenance and inspection
⚠Warning
(1) When disassembling and inspecting the product, ensure that pressure in the valve
and pipe is atmospheric pressure. If using with high temperature fluids, cool the
product down well until it can be touched with bare hands.
*If the fluid flows out, the surroundings will get dirty. High temperature fluids may
cause burn injury.
(2) Disassembly and inspection should be conducted by properly trained personnel or
manufacturer.
(7) Do not install the product on the suction side of the pump.
*Such installation will damage the product.
(8) Avoid installing the product at a location where the flow is uneven, such as near the
discharge outlet of the pump, outlet of an elbow, downstream side of a reducer and
outlet side of a control valve. If such installation is unavoidable, spare a distance about
5 times of the nominal size and install the valve with a posture in which the disc does
not rotate by uneven flow.
*Uneven force applied on the valve disc may damage the product.
Disc
Disc rotates
Disc
✓✕
Correct Wrong

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■EPDT-383■
5.2. Periodic inspection
Conduct periodic inspection once a year to maintain functions and performance of the
product. If abnormalities were detected, refer to “5.3 Troubleshooting” and take measures.
Inspection items
○Whether opening and closing operation is normal
○Whether there is abnormal noise
○Whether there is external leak
5.3. Troubleshooting
Trouble
Cause
Remedy
External leak
from the
gland part
Nut [11] is loose.
Tighten nut [11]. If the leak does not stop,
replace the product.
Seat leakage
Seat [4] is damaged.
Replace seat [4].
Disc [3] is damaged.
Replace the product.
Foreign substances are
stuck.
Remove the foreign substances.
Abnormally
high
operation
torque
Nut [13] is overtightened.
Loosen nut [11] and re-tighten so that
there is no leak (but not too tightly).
Seat [4] is damaged.
Replace seat [4].
Foreign substances are
stuck.
Remove the foreign substances.
Abnormal
noise
Nut [11] is loose.
Tighten nut [11]
5.4. Cautions and procedures for seat replacement
⚠Caution
(1) When replacing the seat, be careful not to drop parts. Keep the dismantled parts on
soft cloth so that they will not be damaged.
*Damage on the parts may impair the product’s function.
(2) Do not disassemble the product unnecessarily for purposes other than replacing the
seat.
*Disassembly may impair the product’s function.
Seat replacement procedure
(1) Fully close the valve.
(2) Detach the retainer bolts [9] and the seat retainer [2].
(3) Remove the seat [4] and clean the seating part of the body [1] and the
retainer [2].
(4) Install the new seat [4].
(5) Install the seat retainer [2] and fix it with retainer bolts [9].
6. Disposal
When disposing the product, refer to the drawing to check material of each part and dispose
them separately according to local rules and regulations.

PDD-046f
Warranty Information
1. Limited warranty
This product has been manufactured using highly-advanced techniques and subjected to
strict quality control. Please be sure to use the product in accordance with instructions on
the manual and the label attached to it.
Yoshitake warrants the product to be free from any defects in material and workmanship
under normal usage for a period of one year from the date of receipt by the original user, but
no longer than 24 months from the date of shipment from Yoshitake’s factory.
2. Parts supply after product discontinuation
This product may be subject to discontinuation or change for improvement without any prior
notice. After the discontinuation of the product, Yoshitake supplies the repair parts for 5
years otherwise individually agreed.
3. This warranty does not cover the damage due to any of below:
(1) Valve seat leakage or malfunction caused by foreign substances inside piping.
(2) Improper handling or misuse.
(3) Improper supply conditions such as abnormal water pressure/quality.
(4) Water scale or freezing.
(5) Trouble with power/air supply.
(6) Any alteration made by other than Yoshitake.
(7) Use under severe conditions deviating from the design specifications
( e.g. in case of corrosion due to outdoor use).
(8) Fire, flood, earthquake, thunder and other natural disasters.
(9) Consumable parts such as O-ring, gasket, diaphragm and etc.
Yoshitake is not liable for any damage or loss caused by malfunction or defect of the product.