Balancing valve – Ductile iron
A flanged, ductile iron balancing valve that delivers accurate hydronic performance in an impressive range of applications. The STAF-SG is ideal for use mainly on the secondary side in heating and cooling systems.
Heating (not steam) and cooling systems
Shut-off (The restriction cone for valve sizes DN 65-400 is pressure released).
Max. working temperature: 120°C
Min. working temperature: -20°C
Body: Ductile iron, EN-GJS-400-15 (~ ASTM A536 Grade 60-40-18. ISO 1083 Grade 400-15).
DN 20-150: Bonnet, restriction cone and spindle of AMETAL®.
DN 200-300: Bonnet of ductile iron, cone of Bronze and spindle of AMETAL®.
DN 350-400: Bonnet of ductile iron, cone of silicon brass CuZn16Si4-C (EN 1982) or brass CuZn35Pb2Al-C-GS (EN 1982) and spindle of AMETAL®.
Seat seal: Cone with EPDM ring.
Bonnet bolts: Chromed steel.
Handwheel: DN 20-50 polyamide and TPE, DN 65-150 polyamide, DN 200-400 aluminium.
AMETAL® is the dezincification resistant alloy of IMI Hydronic Engineering.
DN 20-200: Epoxy painting.
DN 250-400: Duasolid painting.
DN 20-50: TA, PN, DN (mm), 400-15 (material) and flow direction arrow.
DN 65-400: TA, Class 150, size (inch), 60-40-18 (material), casting date and flow direction arrow.
CE-marking according to table:
*) Notified body.
DN 20-50: ISO 7005-2 and EN 1092-2. Bolt circle according to Class 150 ASME/ANSI B16.42.
DN 65-400: Class 150 ASME/ANSI B16.42 (~ PN 20 according to ISO 7005-2).
Face to face:
According to ISO 5752 series 1 and EN 558-1 series 1.
The products, texts, photographs, graphics and diagrams in this document may be subject to alteration by IMI Hydronic Engineering without prior notice or reasons being given. For the most up to date information about our products and specifications, please visit www.imi-hydronic.com.