This Flanged Swing Check Valve is a robust SG-iron non-return valve for water and wastewater service. A resilient EPDM-faced disc swings open under forward flow and closes automatically on reversal to protect pumps and downstream equipment, with optional gate materials and a counter-weighted lever to tailor closing behaviour to the application.

Features & Specifications

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

• SG-iron (ductile-iron, Grade 420/12) body with 250 micron fusion-bonded epoxy coating (signal blue)

• EPDM-encapsulated SG-iron gate; NBR-encapsulated gate available on request

• Stainless-steel (Grade 304) swing arm with stainless-steel hanger pin (Grade 410) and split pin (Grade 304)

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

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

• NBR / EPDM O-ring sealing; brass drain plug for servicing

• SG-iron bonnet with HT-steel (Grade 8.8) cap screws

• Flanged ends for straightforward in-line mounting on reticulation and pump 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.