Yoshitake BLV-2SF User manual

■EPDT-369■
Model BLV-2SF Ball 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 main parts ................................................................ 2
2.2 Dimension and weights....................................................................... 3
3. Installation................................................................................................ 4
3.1.Cautions for installation .................................................................. 4
4. Operation ................................................................................................. 4
4.1.Warnings and cautions for product usage ................................... 4
5. Maintenance and inspection ................................................................. 5
5.1.Warnings and cautions for maintenance and inspection........... 5
5.2.Periodic inspection........................................................................... 5
5.3.Troubleshooting................................................................................ 5
5.4.Cautions for disassembly and re-assembly................................. 5
5.5.Disassembling procedure ............................................................... 6
5.6.Assembling procedure..................................................................... 6
6. Disposal.................................................................................................... 6
Warranty Information

-1-
■EPDT-369■
1. Specifications
Model
BLV-2SF
Nominal size
15-100A
Application
Steam, air, cold and hot water, oil, other non-dangerous fluid
Max. pressure
Max. temperature
According to Pressure-Temperature rating
Material
Body, cap
Stainless steel
Ball
Stainless steel
Ball seat
PTFE
Connection
JIS 10K RF
ANSI 150lb RF
EN PN16
Features
⚫Full bore type
⚫There is no restriction on flow direction.
⚫Anti-static design prevents static electricity charging on
the valve.
⚫The collar on the lower end of the stem prevents the stem
from popping out due to the internal pressure even if the
gland is removed.
Pressure-Temperature rating
⚠Caution
Confirm that the indications on the body casting correspond with the specifications of ordered
product.
*If they are different, do not use the product and contact us.
Usable range
The valve can be used in this range.
Temperature (°C)
Pressure (MPa)

-2-
■EPDT-369■
2. Structure and dimensions
2.1 Structure and main parts
No.
Part name
Q’ty
No.
Part name
Q’ty
1
Body
1
10
Gland
1
2
Cap
1
11
Nut
1 set
3
Ball
1
12
Stud bolt
1 set
4
Seat
2
13
Bolt
2
5
Gasket
1
14
Spring washer
2
6
Stem
1
15
Anti-static device
2
7
Thrust washer
1
16
Stopper
1
8
Gland packing
3
17
Snap ring
2
9
Stem packing
1
18
Handle
1

-3-
■EPDT-369■
2.2 Dimension and weights
(mm)
Size
L
L1
H
K
M
P
S
G
d
Flange JIS 10K RF
Weight
(kg)
D
C
g
f
t
n-h
15A
108
51.7
73
145
M5
42
8
12
15
95
70
51
1
12
4-15
1.9
20A
117
58.5
79
145
M5
42
8
12
20
100
75
56
1
14
4-15
2.3
25A
127
54.7
91
165
M6
50
10
14
25
125
90
67
1
14
4-19
3.8
32A
140
63
94
165
M6
50
10
14
32
135
100
76
2
16
4-19
4.8
40A
165
73.8
113
230
M8
70
14
21
38
140
105
81
2
16
4-19
6.5
50A
178
86.7
122
230
M8
70
14
21
50
155
120
96
2
16
4-19
8.6
65A
190
95
144
230
M8
70
14
21
65
175
140
116
2
18
4-19
12.7
80A
203
101
151
320
M10
102
18
28
80
185
150
126
2
18
8-19
17.8
100A
229
118.6
165
320
M10
102
18
28
100
210
175
151
2
18
8-19
24
(mm)
Size
L
L1
H
K
M
P
S
G
d
Flange ANSI 150lb RF equivalent
Weight
(kg)
D
C
g
f
t
n-h
15A
108
51.7
73
145
M5
42
8
12
15
88.9
60.5
35
1.6
11.2
4-16
1.6
20A
117
58.5
79
145
M5
42
8
12
20
98.6
69.9
43
1.6
11.2
4-16
1.9
25A
127
57.2
91
165
M6
50
10
14
25
108
79.2
51
1.6
11.2
4-16
2.8
32A
140
63
94
165
M6
50
10
14
32
117.3
88.9
63.5
1.6
12.7
4-16
3.7
40A
165
82.8
113
230
M8
70
14
21
38
127
98.6
73
1.6
14.3
4-16
5.9
50A
178
86.7
122
230
M8
70
14
21
50
152.4
120.7
92
1.6
16
4-19
8.5
65A
190
95
144
230
M8
70
14
21
65
177.8
139.7
105
1.6
17.6
4-19
12.6
80A
203
101
151
320
M10
102
18
28
80
190.5
152.4
127
1.6
19.1
4-19
18.1
100A
229
118.6
165
320
M10
102
18
28
100
228.6
190.5
157
1.6
23.9
8-19
28.2
(mm)
Size
L
L1
H
K
M
P
S
G
d
Flange EN PN16 equivalent
Weight
(kg)
D
C
g
f
t
n-h
15A
130
61.7
73
145
M5
42
8
12
15
95
65
45
2
16
4-14
2.1
20A
150
73.5
79
145
M5
42
8
12
20
105
75
58
2
18
4-14
2.8
25A
160
72.1
91
165
M6
50
10
14
25
115
85
68
2
18
4-14
4.3
32A
180.3
83
94
165
M6
50
10
14
32
140
100
78
2
18
4-18
5.8
40A
200
97.8
113
230
M8
70
14
21
38
150
110
88
3
18
4-18
7.5
50A
230
111.7
122
230
M8
70
14
21
50
165
125
102
3
18
4-18
10.2
65A
290
144.8
144
230
M8
70
14
21
65
185
145
122
3
18
4-18
15
80A
310
154.5
151
320
M10
102
18
28
80
200
160
138
3
20
8-18
20.7
100A
350
179.3
165
320
M10
102
18
28
100
220
180
158
3
20
8-18
28.5

-4-
■EPDT-369■
3. Installation
3.1. Cautions for installation
⚠Caution
(5) There is no restriction on the flow direction.
(6) The valve can be installed both horizontally and vertically, but do not install
upside-down.
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 equipment may be damaged by water hammer or condensate
problem.
(4) The product should be used fully open or fully close.
*When used at intermediate opening, the ball and the seat may be damaged.
(1) Do not disassemble the product unless it is necessary.
*It may prevent the product from functioning properly.
(2) 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.
*Select sealing gaskets suitable for the fluid characteristics, pressure and
temperature.
*Tighten the bolts uniformly in diagonal order.
(3) Connect the product so that it is not subject to excessive load, bending and vibration.
*They may seriously shorten the lifetime of the product.
(4) If freezing is possible, take antifreeze measures such as draining or insulation.
*The frozen fluid may damage the product.
✓✕
Good Wrong

-5-
■EPDT-369■
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 released to 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.
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
Nut [11] is loose.
Tighten nut [11].
Bolt [13] is loose.
Tighten bolt [13].
Gasket [5] is damaged.
Replace seat [4] and gasket [5].
Gland packing [8] is damaged.
Replace all the packings.*
Seat leak
Seat [4] is damaged.
Replace seat [4] and gasket [5].
Ball [3] is damaged.
Replace the product.
Foreign substances are stuck.
Remove the foreign substances.
Abnormally high
operation torque
Bolt [13] is overtightened.
Loosen bolt [13] and re-tighten so that there
is no leak (but not too tightly).
Foreign substances are stuck.
Remove the foreign substances.
Abnormal noise
Bolt [13] is loose.
Tighten bolt [13].
*Packings: seat [4], gasket [5], thrust washer [7], gland packing [8], stem packing [9]
5.4. Cautions for disassembly and re-assembly
⚠Caution
(1) When disassembling and re-assembling, replace the packings with new ones.
(2) When disassembling and re-assembling, 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.
(3) When reassembling, assemble the parts securely. Tighten the bolts and nuts
uniformly in diagonal order.
*Loose assembly or uneven tightening may cause fluid leakage.

-6-
■EPDT-369■
5.5. Disassembling procedure
(1) Close the valve fully.
(2) Detach the snap rings [17] from the stem [6], and remove the handle [18]
and stopper [16].
(3) Remove the nuts [11] fixing the body [1] and cap [2], and take the cap [2] off
the body [1].
(4) Remove the gasket [5] from the body [1] or cap [2].
(5) Remove the ball [3] from the body [1].
(6) Push the stem [6] to inside body [1] and remove it.
(7) Remove the thrust washer [7] from the stem [6].
(8) Remove the seats [4] from the body [1] and cap [2].
(9) Remove the bolts [13], and disassemble the gland [10], stem packing [9] and
gland packing [8].
5.6. Assembling procedure
(1) Mount 3 pieces of gland packing [8] on the body [1]. Be sure that the V-
shaped grooves are on downside.
(2) Insert the stem packing [9] into the gland [10], and fix them temporarily on
the body [1] with bolts [13].
(3) Assemble the seats [4] on the body and cover [2].
(4) Attach the thrust washer [7] on the stem [6].
(5) Insert the stem [6] from inside the body [1] and push in until the collar of the
stem [6] contacts the body [1]. Then rotate it until the full-close position.
(6) Mount the ball [3] on the body [1] so that its groove fits the stem [6].
(7) Fit the gasket [5] on the body [1].
(8) Attach the cap [2] on the body [1] without moving seat [4], and fix them with
nuts [11].
(9) Mount the stopper [16] on the stem [6] and fix them with snap ring [17].
(10) Tighten the bolts [13] which had been temporarily fastened.
(11) Mount the handle [18] on the stem [6] and fix with the snap ring [17].
(12) Check and confirm that all fastening parts are securely fastened.
Size and torque of fastening parts
Nominal
size
Nut [11]
Bolt [13]
Nominal
diameter
of screw
Size of
Wrench
Torque
(N・m)
Nominal
diameter
of screw
Size of
Wrench
Torque
(N・m)
15, 20A
M8
13
10
M5
8
6
25, 32A
M10
17
19.6
M8
13
9
40, 50A
M12
19
34.5
M10
17
15
65, 80A
M12
19
34.5
M10
17
24
100A
M12
19
34.5
M10
17
42
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.