The Flanged Swing Check Valve is a ductile-iron (SG iron) non-return valve that automatically prevents reverse flow in water and wastewater pipelines. A single hinged disc swings clear of the bore under forward flow and drops closed on flow reversal, giving low head loss in service and reliable, seat-tight protection for pumps and downstream equipment.

Features & Specifications

• Designed to BS5153 and compliant with SANS 1551-2:2007

• SG-iron (ductile-iron, Grade 420/12) body, FBE coated 250 micron (signal blue)

• EPDM-encapsulated SG-iron gate with stainless-steel (Grade 304) swing arm

• NBR-encapsulated gate available on request

• Counter-weighted lever available on request for faster, non-slam closure

• Rated PN16 (available across PN16–PN40); size range DN50–DN300

• Stainless-steel hanger pin (Grade 410) and split pin (Grade 304); brass drain plug

• NBR / EPDM O-ring sealing

• Flanged ends for straightforward in-line installation on pump and reticulation mains

Dimensions & Technical Data

Cross-section, material list and dimension table (DN50–DN300):

Material list: body — SG iron Grade 420/12 (FBE coated); bonnet — SG iron Grade 420/12; gate — EPDM-encapsulated SG iron; swing arm — stainless steel Grade 304; hanger pin — stainless steel Grade 410; split pin — stainless steel Grade 304; cap screw — HT steel Grade 8.8; O-rings — NBR / EPDM; drain plug — brass.