Yoshitake BFV-1S Manuale utente

■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

-1-

■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.

-2-

■EPDT-383■

2. Structure and dimensions

2.1. Structure and dimensions of 50-150A

No.

Part name

Q’ty

No.

Part name

Q’ty

Body

Retainer Bolt

1 set

Seat Retainer

Bolt

Disc

But

Seat

Taper Pins

1 set

Stem

Plug

Bearing

Name Plate

Gland Packing

1 set

Indicator Plate

Gland

Lever Handle*

*The lever handle [16] is not attached when shipped.

(mm)

Size

Weight

(kg)

JIS 10K

EN PN16

ANSI 150lb

212

137

210

120

125

120.5

3.5

227

152

119

210

140

145

139.5

4.5

237

162

128

210

150

160

152.5

100

252

102

177

158

210

175

180

190.5

125

120

273

120

195

186

250

210

216

150

142

295

132

217

216

250

240

241.5

-3-

■EPDT-383■

2.2.Structure and dimensions of 200-300A

No.

Part name

Q’ty

No.

Part name

Q’ty

Body

Retainer Bolt

1 set

Seat Retainer

Bolt

Disc

But

Seat

Taper Pins

1 set

Stem

Plug

Bearing

Name Plate

Gland Packing

1 set

Gearbox

Gland

Handwheel*

*The lever handle [16] is not attached when shipped.

(mm)

Size

Weight

(kg)

JIS

10K

PN16

ANSI

150lb

200

190

411

167

245

265

210

260

290

295

298.5

250

238

490

205

298

320

210

300

355

362

300

282

527

245

335

378

210

300

400

410

432

-4-

■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

Handle

-5-

■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

-6-

■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.

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