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SL-SN-B
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SL-SH-B
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SL-SNP-B
Swing type (Bore 150-450mm)
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SL-SHP-B
Swing type (Bore 500-1500mm)
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 P denotes that the check valve is equipped with a No-Feed Detector. |
If a valve with a bore greater than 1500mm is required, please contact
us.
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A compact dashpot has been built into the YOKOTA Non-Water Hammer Check
Valve.
Dashpot Type Check Valve (Buffered closing by-pass valve)
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Ideal design
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Based on non-water hammer principle, closure delay of the main valve disk
is eliminated and water hammer and shock do not occur. Also, the patented
mechanism, including the buffered closing by-pass valve, prevents pressure
increase after main valve disk closure. Therefore, the valve is an ideal
device that can be used extensively in low to high head specifications.
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Easy maintenance
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The dashpot is attached at the side of the valve case so adjustment and
maintenance are easy to perform.
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Easy oil control
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The dashpot is small and separate from the passage of the main valve. Therefore
oil leaks do not occur and oiling is practically unnecessary.
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Freely choose between vertical or horizontal installation
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This valve can be installed in either vertical or horizontal piping.
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Simple construction
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The main valve features an extremely simple, single-disk construction (with
a built-in counterweight). Moreover, the valve arm pin of the main valve
does not bear torsional load due to the non-water hammer principle, allowing
for a compact design and cost reduction.
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Part name
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Buffered by-pass valve
material code
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G
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N
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X, Y
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1
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Valve case
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FC
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FCD
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SCS
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2
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Valve cover
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FC
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FCD
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SCS
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3
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Valve disk
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SCS
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SCS
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SCS
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4
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Valve rod
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SUS
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SUS
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SUS
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5
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Valve seat
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SUS
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SUS
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SUS
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6
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Maintenance by-pass valve
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SUS
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SUS
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SUS
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7
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Dashpot
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S45C
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S45C
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S45C
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Bore
d
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Model No.
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Width WN
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150
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SL-SN-150B
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360
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200
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SL-SN-200B
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430
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250
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SL-SN-250B
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580
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300
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SL-SN-300B
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620
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350
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SL-SN-350B
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740
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400
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SL-SN-400B
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860
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450
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SL-SN-450B
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900
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Bore
d
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Model No.
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Width WH
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500
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SL-SH-1500B
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1870
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600
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SL-SH-1600B
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1980
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700
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SL-SH-1700B
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1150
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800
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SL-SH-1800B
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1300
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900
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SL-SH-1900B
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1450
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1000
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SL-SH-1000B
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1550
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1200
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SL-SH-1200B
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1800
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1350
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SL-SH-1350B
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1950
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1500
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SL-SH-1500B
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2200
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Buffered closing by-pass valve type is applicable when actual head is over
10m.
Please inquire if actual head is less than 10m.
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Please specify the level of reverse pressure on the valve and the by-pass
valve closure time when making an inquiry.
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As for material code and dimensions of the main valve, please refer to
SL-SN type and SL-SH type.
Selection chart
If it is necessary to prevent water hammer due to recombined flow after
water column separation in the middle of piping, please contact us.
Specifications stated here may be subject to change without notice due
to product improvement.
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