Fig. 3820 Free Acting Recoil Type Swing Check Valve

Figure 3820, 3822, 3823.
 
Metal seat Free Acting Check Valve to prevent reverse flow, suitable for water, wastewater and sewage applications.

Flanges to BSEN 1092-2 table - PN16 BS4504, size range 100-1400mm, cast or Ductile iron with gunmetal seats.

Certain applications, particularly those associated with centrifugal pumping sets demand a higher standard of performance than the standard type of check valve can offer. The Hi-Check is designed to cope with those more arduous conditions, being able to handle higher velocities and offering quicker response to deceleration of the column to minimise slamming and resultant surges. This is achieved by low seat angle. The Hi-Check valves open fully under flow and this reduces head loss in the open position.
To cope with particularly arduous conditions a range of special weight doors are available, please submit details of your application with any enquiry.
 
Features.
  • Designed for rapid closure.
  • Robust compact ductile iron design.
  • Gunmetal seated.
  • Stainless steel shaft.

Service Conditions.

  • Potable water, filtered water, dirty water & sewage.
  • Working pressure 16 bar.
  • Temperature range -10°C to 70°C. (Insulate at 0°C and below)
Standards.
  • Designed according to EN 1074 - 3.
  • Standard flange drilling to EN1092-2 (ISO 7005-2), PN 10/16.
Test/Approvals.
  • Hydraulic test to EN 1074-3.
  • Seat: 1.1 x PN (in bar), Body: 1.5 x PN (in bar).
  • Approved for waste water / pressure test EN 1074.
Accessories / Options.
  • Extra Heavy Doors.
  • Non Standard Flanges.
  • Proximity and Limit Switch.
  • By-pass.
  • Double-Door Design DN500-DN900.
  • Multi-Door Design DN1000-DN14000.
  • PN25.

Single Door DN150-450

Double Door DN500-900

DescriptionMaterialStandardOptions
Body & CoverCast IronBSEN 200Ductile
Seat Ring in Body & DoorGunmetalBSEN 1982 CC491K
CoatingIntexEpoxy or Marine Paint
Hinge PinStainless SteelBS 970
Hinge Pin & BushGunmetalBS 1400 LG2
Studs & NutsSteel Zinc CoatedBS 2693/1Stainless Steel 304, 316
Cover GasketNAFBS 7531 Grade x

Single Door Dimensions.

SizeABCDEFGHJKWeight (kg)
150508314482285212253822240112
2006103725493402683031222295187
2507114226224053203231226410257
3008134866984603783241226470359
3508895507755204383641626470532
4009656008068504903841630525621
45010166318546405504042030585770
Double Door Dimensions.
SizeCC1EFGHJKLPRST
5008649404066071128715424610650356254229
6009149904516581240840485725770388260229
70096510405087371337908485795840438260267
800101610905467751456997485900950438273267
900121912956359151551112551510001050572349267
1000121912957819401816125554511151170699394305

For more technical information, please see below.