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Non return ball check valve in cast iron DN50-400

Non return ball check valve in cast iron DN50-400

CHOICE OF PRODUCT
Check valves
PRODUCT FAMILY
PIPELINE PROTECTION
PIPELINE PROTECTION
RANGE / MARK ®
CHECK VALVES and STRAINERS
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Main features
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  • For used water (cleansing station, pumping station)
  • Flanges drilled according to DIN 2501 PN10
  • Face to face dimension DIN 3202/F1

Material and coating

ItemDescriptionMaterialCoating

1

Body, cap and seat

Cast iron GS

Epoxy thickness 250 microns

2

Ball

DN50 TO 100 : Aluminium type AK 11

NBR

DN125 TO 400 : cast iron GS

3

Screws and bolts

Steel type A2

4

Joint cap/body

NBR

Hydraulic characteristics

  • Headloss at the opening 0.8 bar
  • Headloss: Kv
The headloss ∆P in the valve is expressed by the flow coefficient Kv that is the flow at a temperature of 20°C crossing the check valve by causing a headloss of 1 bar.

Those sizes are tied by the simplified following relation:

Kv = Q ∆P

with Q in m³/h and Kv in m³/h, ∆P in bar.

Flow coefficient according to DN:

DN

50

65

80

100

125

150

200

250

300

KV (m³)

92

145

265

384

642

784

1592

2480

3380

Tightness mini on water column downstream: 8m CE.

Installation drawing