Non-Water Hammer Check Valve

Non-Water Hammer Check Valve
SL series (PAT.)

No valve closure delay means no water hammer and no noise

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SL-SN
SL-SNP
Swing type

P denotes that the check valve is equipped with a No-Feed Detector.

This swing type check valve with a built-in counterweight is designed taking into account the inertial moment of the center of gravity of the valve disk. The valve seat is uniquely sloped and the case configuration in front of, and behind the valve seat is designed to facilitate immediate valve closure. Inspection of the interior can be performed easily by removing the valve cover.

Unit: mm

Part name		Material code (JIS 10K standard)
Part name		B	F	G	X, Y
`1`	Valve case	FC	FC	FC	SCS
`2`	Valve cover	FC	FC	FC	SCS
`3`	Seat holder	FC	FC	FC	SCS
`4`	Valve disk	FC	FC	SUS	SUS
`7`	Valve seat	CAC406	SUS	SUS	SUS
`8`	Coil sleeve	(SUS)	(SUS)	(SUS)	(SUS)
`10`	Valve spindle	SUS	SUS	SUS	SUS
`12`	Valve arm	SCS	SCS	SCS	SCS
`13`	Valve arm pin	SUS	SUS	SUS	SUS
`19`	Pin holder	SUS	SUS	SUS	SUS
`30-2`	Seal ring	Chloroprene	Chloroprene	NBR	NBR
`33`	O-ring	NBR	NBR	NBR	NBR
`40`	By-pass valve	C3603	C3603	SUS	SUS
`41`	No-Feed Detector	(C3603)	(C3603)	(SUS)	(SUS)

Unit: mm

Bore
d JIS 10K standard Weight

L R J H E F G K M N n-h (kg)

50

195

148

112

-

11

65

210

167

122

-

16

80

215

187

122

-

18

100

240

197

130

-

25

125

270

226

180

-

35

150

310

256

190

-

60

200

380

316

225

-

100

250

430

381

278

255

165

75

150

100

270

320

4-19

171

300

530

413

308

295

200

175

180

130

310

360

4-19

207

350

600

470

332

335

225

200

150

350

400

4-19

255

400

700

585

358

375

260

235

230

180

400

450

4-19

448

450

750

600

388

410

275

250

200

450

500

4-19

575

Note:

	Material code X denotes SCS13, material code Y denotes SCS14. We also manufacture other materials, such as FCD and special duplex type stainless steel.
	Regarding material code B and F, the seal ring is replaced by a valve liner when material of the valve disk is FC.
	The coil sleeve and the No-Feed Detector are optional parts.
	The valve arm and the valve disk form the counterweight.
	The seat holder and the valve seat are integrated for valves with a bore of 100mm or less.
	Installation positions of the by-pass valve and the No-Feed Detector are on the right side when viewed from the inlet side. For valves with a bore of 50, 65 or 80mm, the installation position of the by-pass valve is on the bottom.
	Legs can be attached as an option on valves with a bore of 250mm or more.
	Applicable liquid temperature : 0-70 degree C Please contact us if liquid temperature is more than 70 degree C.
	Please contact us if flange standard is higher than JIS 30K.

SL-SN type characteristics (Water head loss without coil sleeve - Flow rate)

Specifications stated here may be subject to change without notice due to product improvement.

Features

Structure

Technical data

Selection & Dimensions

Inquiry form

Yokota Manufacturing Co., Ltd. Tel: +81 82-241-8672 E-mail: yokota@aquadevice.com