STAF, STAF-SG
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.
Features and Benefits
Handwheel
Equipped with a digital read-out, the handwheel ensures accurate and straightforward balancing.
Handwheel for DN 65-150 with side reading makes the read-out easy from any angle.
Accurate and precise
Provides high accuracy of measurement.
Self-sealing measuring points
For simple, accurate balancing.
Positive shut-off function
Applications
Heating and cooling systems.
Functions
Balancing
Measuring
Presetting
Shut-off
Media
Water or neutral fluids, water-glycol mixtures (0-57%).
Connection
Flanges: ISO 7005-2, EN 1092-2.
Material
Body, STAF: Cast iron EN-GJL-250 (GG 25).
Body, STAF-SG: Ductile iron EN-GJS-400-15.
DN 20-150: Bonnet, cone and spindle of AMETAL®.
DN 200-300: Bonnet and cone of ductile iron EN-GJS-400-15, and spindle of
AMETAL®.
DN 350-400:
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®.
Cone DN 100-400: PTFE coated.
Seals: EPDM.
Slip washer: PTFE.
Bonnet bolts: Surface treated 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.
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