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.


Non-Water Hammer Check Valve SL-SN

Unit: mm

Part name
Material code (JIS 10K standard)
F
G
X, Y
1

Valve case

FC
FC
SCS
2

Valve cover

FC
FC
SCS
3

Seat holder

FC
FC
SCS
4

Valve disk

FC
SUS
SUS
7

Valve seat

SUS
SUS
SUS
8

Coil sleeve

(SUS)
(SUS)
(SUS)
10

Valve spindle

SUS
SUS
SUS
12

Valve arm

SCS
SCS
SCS
13

Valve arm pin

SUS
SUS
SUS
19

Pin holder

SUS
SUS
SUS
30-2

Seal ring

Chloroprene
NBR
NBR
33

O-ring

NBR
NBR
NBR
40

By-pass valve

C3603
SUS
SUS
41

No-Feed Detector

(C3603)
(SUS)
(SUS)

Unit: mm

Bore
d
JIS 10K standard
Weight
(kg)
L
R
J
H
E
F
G
K
M
N
n-h

50

195

153

112

-
-
-
-
-
-
-
-

11

65

210

172

122

-
-
-
-
-
-
-
-

16

80

215

192

122

-
-
-
-
-
-
-
-

18

100

240

204

130

-
-
-
-
-
-
-
-

25

125

270

233

180

-
-
-
-
-
-
-
-

35

150

310

261

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

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

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 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 200mm 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)

Non-Water Hammer Check Valve / Characteristics (Water head loss - Flow rate) SL-SN
( Water head loss is approximately 20% higher with coil sleeve. )

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

Features
Structure
Technical data
Selection & Dimensions
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