Pipeline ancillaries

Disc, split disc and wafer check valves

Dimensions/weights (approximate) in mm and kg

D

C

B

A

E

PN6

PN10

PN16 PN25

Size

Kv

A

B

B

B

B

B

B

B

C

D

E

Weight

PN40 ASME 150 ASME 300

*

101

72

3.1

125

71

4.9

163

79

11.0

205

73

15.0

240

80

25.0

269

65

37.0

308

62

55.0

336

57

65.0

368

56

105.0

DN125

553

DN150

728

DN200 1 027

DN250 1 900

DN300 2 140

DN350 4 160

DN400 5 140

DN450 6 200

DN500 9 500

96

184

194

115

209

220

142

264

275

190

319

330

218

375

380

265

425

440

315

475

491

358

530

541

410

580

596

194

196

220

226

275

286

331

343

386

403

446

460

498

517

558

567

620

627

196

197

226

222

293

279

355

340

420

410

477

451

549

514

-

549

631

606

216

16

251

18

308

28

362

28

422

38

486

41

540

48

597

51

654

65

Opening pressure in mbar

*

For check valves in austenitic stainless steel at PN10

Differential pressures with zero flow for standard springs.

Flow direction

DN125

9.40

0.98

DN150

12.20

0.98

DN200

18.40

1.17

DN250

16.90

0.98

DN300

DN350

20.60

22.10

1.17

1.17

DN400

24.00

1.27

DN450

24.10

1.27

DN500

31.10

1.96

Pressure loss diagram

����

��

������

����

��

������

��

��

������

��

��

������

��

��

������

��

��

������

��

��

������

������

������

������

����

��

��

������

��

��

������

��

��

������

��

��

������

������

������

������

������

������

����

����

����

����

Safety information, installation and maintenance

For full details see the Installation and Maintenance Instructions

(IM-P134-61) supplied with the product.

Installation note:

WCV wafer type check valves can be installed, sandwiched between

weld neck flanges, with horizontal flow or vertical upward flow.

When installing on a pump delivery side, do not assemble direct

onto the pump flange or following bend or elbows, allow a distance

of 5 to 10 pipe diameters.

Note: Flanges, bolts (or studs), nuts and gaskets are to be

supplied by the installer.

Disposal:

The product is recyclable. No ecological hazard is anticipated with

disposal of this product providing due care is taken. However, if the

recycling process involves a temperature approaching 315°C

caution is advised regarding decomposition of the viton component.

How to order

When ordering, please specify:

1. Nominal pipe diameter (DN)

2. Body material

3. Flow medium

4. Maximum operating temperature

5. Nominal pressure (PN)

6. Flanging

7. Sealing ring

How to order example

1 off Spirax Sarco DN150 WCV1 bronze body wafer type check

valve having a standard EPDM sealing ring, hot water at 110°C,

PN at 6 bar g, supplied to fit between EN 1092 PN16 flanges.

Spare parts

WCV type wafer check valves are non-maintainable - There are

no available spares.

������

������

�������� �������� �������� ������ ������

������ ��

�� ��

Pressure drop bar

To establish pressure loss in other media, use the water volume

flow as an equivalent.

Vw=

√

ρ

xV

1000

Where: Vw

ρ = Density of fluid in kg /m

3

= Equivalent water volume flow in l / s or m

3

/ h

V = Volume of fluid in l/s or m

3

/h

Pressure loss information for steam, compresed air and gases are

available from Spirax Sarco.

TI-P134-03 ST Issue 8

WCV1, WCV2 and WCV3 Wafer Check Valves

7.6.30

W

a

t

e

r

f

l

o

w

r

a

t

e

i

n

V

w

I

/

s

a

t

2

0

°

C

DN500

DN450

DN350

DN150

DN125

DN400

DN200

DN250

DN300

W

a

t

e

r

f

l

o

w

r

a

t

e

i

n

V

w

m

3

/

h

a

t

2

0

°

C