Check valves

DN40-300

Check valves

RANGE / MARK ®
CHECK VALVES and STRAINERS
CHECK VALVES and STRAINERS
PRODUCT FAMILY
PIPELINE PROTECTION
PIPELINE PROTECTION
Main features

This check valve is designed to equip supply hydraulic networks and pumping stations. It has been articulated swing lying on an inclined seat and an integral passage in large opening. The design of the obturator insures the tightness at low-counter pressure and a silent functioning.

Range

The check valves are available from DN40 to DN500, at PFA 16 bars, drilling ISO PN10 or ISO PN16.

Dimensions and mass

DN40-300

Material and coating

Item

Designation

Material

Coating

1

Body

1

Ductile iron GJS 400-15

Powder Epoxy 250µ Mini

2

Cover

1

Ductile iron GJS 400-15

3-3a

Disc

1

Ductile iron GJS 400-15

EPDM

3b

Axis

1

Stainless steel X5CrNi18-10

4

Plug screw

1

Brass Cu Zn39Pb3

5

Washer

1

Copper

6-7-8

Bolts

2

Stainless steel A2-70

9

Cover gasket

1

E.P.D.M.

10

Seat

1

Brass Cu Zn39Pb3

Note: available in reinforced version (please contact us)

Particularities

Obturator

The obturator moulded in EPDM is fixed with elastic connection on the articulation axis ; it lies on the inclined seat, folded in the body.

The low inertia of the obturator and the elastomer contact on bronze give that check valve a rapid and silent functioning.

Hydraulic characteristics

Performances

Maximal flowing speed recommended: 4 m /s

Headloss

Q = Kv. √∆ p

DN

40

50

60

65

80

100

125

150

200

250

300

kV

101

158

267

267

404

632

987

1422

2530

3950

5700

Conformity to Standards

  • Length between flanges: NF EN 558-1 Série 48 - ISO 5752 série 48
  • Drilling template of flanges: NF EN 1092-2 - ISO 7005-2
  • Tightness-external/internal: NF EN 1074-3
  • Tightness 24 bars (NFE 29311)
  • Tightness of the obturator to a counter-pressure of 17,6 bars (NFE 29311)
  • Tightness low pressure of the obturator to a minimum pressure of 0,15 bar (0,5 bar fixed to the Standard)

The components in contact with drinking water have alimentary certificates. EPDM has W270 quality with KTW and WRAS certification and epoxy Resicoat coating too.

Marking

According to EN19.

On the body (foundry):

  • Material for body (JS 1030)
  • DN / PN
  • Direction for the fluid
  • Reference to EN 1074-3
  • Mark production

on the label:

Installation, operating, maintenance

The check valve can be set up horizontally, or vertically flowing direction to the top, respecting the set up direction (indicated by the direction sign).

The set up on pipe is made with a dismantling joint and tightness joints flange/flange.

The covering cap, located on the upper part, allows to check the state of the obturator, may be to replace it without any removal of the body.