Balancing valve – PN 16 and PN 25 – DN 20-400
A flanged, cast iron (STAF) and ductile iron (STAF-SG) balancing valve that delivers accurate hydronic performance in an impressive range of applications. The STAF/STAF-SG is ideal for use mainly on the secondary side in heating and cooling systems.
Equipped with a digital read-out, the handwheel ensures accurate and straightforward balancing.
Self-sealing measuring points
For simple, accurate balancing.
Positive shut-off function
For easy maintenance.
Heating and cooling systems.
Shut-off (The balancing cone for valve DN 65-400 is pressure released).
STAF: DN 65-150
STAF-SG: DN 20-400
STAF: PN 16
STAF-SG: PN 16 and PN 25 (see each product)
Max. working temperature: 120°C
For higher temperatures (max. 150°C), please contact the nearest sales office.
Min. working temperature:
Water or neutral fluids, water-glycol mixtures (0-57%).
Body, STAF: Cast iron EN-GJL-250 (GG 25).
Body, STAF-SG: Ductile iron EN-GJS-400-15.
Bonnet, restriction cone and spindle of AMETAL®.
Bonnet of ductile iron EN-GJS-400-15, cone of gunmetal CuSn5Zn5Pb5 (EN 1982) and spindle of AMETAL®.
CE marked products: Bonnet of ductile iron EN-GJS-400-15, cone of ductile iron EN-GJS-400-15 and gunmetal CuSn5Zn5Pb5 (EN 1982), and spindle of AMETAL®.
Not CE marked products: Bonnet of ductile iron EN-GJS-400-15, cone of silicon brass CuZn16Si4-C (EN 1982) and gunmetal CuSn5Zn5Pb5 (EN 1982), and spindle of AMETAL®.
Bonnet bolts: Chromed steel.
Measuring points: AMETAL® and EPDM.
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.
Body: TA, PN, DN, flow direction arrow, material and casting date (year, month, day).
CE-marking according to table:
*) Notified body.
Face to face length:
ISO 5752 series 1, BS 2080 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.