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Selection chart & Outer dimensions
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Specifications/Performance
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Inlet pressure (Primary pressure):
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Max. 981kPa (10kgf/cm2) (For JIS 10K standard)
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Applicable liquid:
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Various liquids at temperatures of 0-70 degree C (Please inquire for special
liquids.)
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Flow rate accuracy of UFSF-C type:
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+/- 10%
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Flange standard:
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JIS 10K, JIS B2062 Waterworks standard
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Material
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(Valve case/Valve disk):
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FC/CAC, FCD/CAC, FC/SUS, FCD/SUS
Besides the above, a wide variety of materials are available, such as YOKOTA's duplex type stainless steel YST130N with high corrosion resistance.
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(Float):
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FRP
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Cavitation characteristics:
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The allowable cavitation coefficients (cc) are:
With a bore less than 100mm: cc = 0.45
With a bore more than 150mm: cc = 0.24
For details, please refer to this page.
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Selection chart
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UFSF-S type (Standard type)
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UFSF-C type (Full range constant flow regulation type)
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How to use the above selection chart
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Plot point C with x-axis value A and y-axis value B, where A is a planned
differential pressure between the front and the rear of the valve, and
B is a planned flow rate. Then select a valve with a bore size line immediately
above point C.
In the above example, a 250mm bore valve is selected.
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Note:
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The above selection chart is based on the maximum flow speed of 3m/sec.
If a planned maximum flow speed exceeds this level, please contact us.
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The flow rate set by the maximum flow rate adjustment screw should be more
than 10% of the maximum flow rate.
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Bore
mm
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Model No.
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Maximum flow rate (l/sec)
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Standard pressure type
50kPa or more
(0.5kgf/cm2 or more)
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Low pressure type
20-200kPa
(0.2-2.0kgf/cm2 )
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80
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UFSF-080C
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6
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4
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100
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-100C
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11
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6
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150
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-150C
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25
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15
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200
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-200C
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44
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25
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250
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-250C
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65
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38
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300
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-300C
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100
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60
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350
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-350C
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110
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66
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400
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-400C
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145
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85
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450
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-450C
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215
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125
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500
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-500C
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230
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135
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600
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-600C
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320
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190
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Note:
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The flow rate set by the maximum flow rate adjustment screw should be more
than 10% of the maximum flow rate.
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The model No. for low pressure type valves is followed by "L".
(e.g. UFSF-200CL)
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Outer dimensions/Installation dimensions
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Independent float tank type (The adjustment plug key and the float tank
are optional accessories.)
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Submerged type
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Integrated float tank type (Bore: 150mm or less)
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The dimensions indicated in the drawings are minimum dimensions which take
into account required maintenance such as assembly and disassembly and
refer only to cases where there is a farm pond adjacent to the valve chamber.
If an independent valve chamber is added to a pipeline (i.e. there is no
farm pond adjacent to the valve chamber), depending on flow conditions,
there may be rapid fluctuations in water level in the float tank, causing
water hammer at the front or the rear of the valve chamber. Therefore avoidance
of such water hammer should be considered in deciding the size of the valve
chamber. For deciding its size, it is recommended to refer to guidelines
such as "Pipeline Design Manual" supervised by the Ministry of
Agriculture, Forestry and Fisheries of Japan. If you need more help, please
contact us.
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Since leg parts are not provided for valves with a bore of 150mm or less,
please support those valves with the piping.
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If air is sucked into the outflow pipe of the valve chamber, a partition
plate should be installed and the valve's discharge opening should be placed
below the lowest water level.
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To mount the float tank, please affix it to the side wall of the chamber
with a band, or, if placing it on the bottom of the chamber, provide a
passage hole at the lower part of the float tank.
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Since the float can be attached on either the left or right side of the
flow direction, please specify when making an inquiry.
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To simplify installation, a unit with the valve preinstalled in a box culvert
can be provided. Please inquire.
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Bore
d
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Model
No.
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Dimensions
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Mounting
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Weight of main body
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Flange (Waterworks standard)
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Valve chamber (minimum dimensions)
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Set water level
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A
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B
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H1
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H2
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E
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F
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G*
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J
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W
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Z
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(kg)
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D
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C
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n-h
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L
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M
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N
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P
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R
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S
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T
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80
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UFSF-080
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280
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440
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550
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95
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420
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200
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442
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170
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-
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-
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35
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211
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168
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4-19
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1030
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1240
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1380
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280
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400
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10
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750
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100
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100
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350
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480
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570
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127
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420
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300
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442
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220
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-
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-
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80
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238
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195
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4-19
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1160
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1290
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1480
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430
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400
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10
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800
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150
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150
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450
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630
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635
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153
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565
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300
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592
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240
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-
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-
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120
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290
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247
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6-19
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1415
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1570
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1750
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550
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700
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30
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920
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200
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200
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600
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740
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690
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220
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670
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450
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700
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360
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320
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23
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230
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342
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299
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8-19
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1720
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1780
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2010
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690
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850
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100
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1100
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250
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250
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700
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850
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850
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250
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670
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450
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700
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380
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500
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23
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380
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410
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360
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8-23
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1975
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1915
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2375
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780
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950
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200
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1200
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300
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300
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800
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950
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885
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295
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760
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500
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800
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390
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440
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23
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500
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464
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414
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10-23
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2230
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2110
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2615
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800
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1100
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240
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1300
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350
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350
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900
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1000
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960
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305
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760
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500
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800
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400
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480
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23
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590
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530
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472
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10-25
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2485
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2185
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2895
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920
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1150
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280
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1400
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400
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400
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1000
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1150
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1040
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320
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855
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500
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900
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410
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660
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25
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800
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582
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524
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12-25
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2740
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2430
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3180
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970
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1200
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280
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1500
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450
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450
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1100
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1300
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1240
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450
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935
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550
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1000
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430
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600
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27
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1200
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652
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585
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12-27
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2995
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2675
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3585
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1000
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1300
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350
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1800
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500
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500
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1200
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1300
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1240
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450
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935
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550
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1000
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430
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600
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27
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1300
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706
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639
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12-27
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3250
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2700
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3790
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1000
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1300
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350
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1800
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600
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600
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1400
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1400
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1435
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500
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1030
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800
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1100
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700
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700
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27
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2300
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810
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743
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16-27
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3760
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2920
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4395
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1300
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1600
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400
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2200
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The dimension G indicates the inner diameter of the float tank.
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Specifications stated here may be subject to change without notice due
to product improvement.
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