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.
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
For easy maintenance.
Technical description
Applications:
Heating and cooling systems.
Functions:
Balancing
Presetting
Measuring
Shut-off (The balancing cone for valves DN 100-400 is pressure released).
Dimensions:
STAF: DN 65-150
STAF-SG: DN 20-400
Pressure class:
STAF: PN 16
STAF-SG: PN 16 and PN 25 (see each product)
Temperature:
Max. working temperature: 120°C
Min. working temperature: -10°C
Media:
Water or neutral fluids, water-glycol mixtures (0-57%).
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.
Surface treatment:
DN 20-200: Epoxy painting.
DN 250-400: Duasolid painting.
Marking:
Body: TA, PN, DN, flow direction arrow, material and casting date (year, month, day).
CE-marking:
CE: STAF (PN 16) DN 65-150, STAF-SG (PN 16) DN 200, STAF-SG (PN 25) DN 50-125.
CE 0409*: STAF-SG (PN 16) DN 250-400, STAF-SG (PN 25) DN 150-400.
*) Notified body.
Flanges:
ISO 7005-2, EN 1092-2.
Face to face length:
ISO 5752 series 1, EN 558-1 series 1.
