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.

Technical description

Applications:

Heating and cooling systems

Functions:

Balancing
Pre-setting
Measuring
Shut-off (The balancing cone for valve DN 65-400 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
For higher temperatures (max. 150°C), please contact the nearest sales office.
Min. working temperature:
STAF: -10°C
STAF-SG: -20°C

Material:

Body, STAF: Cast iron EN-GJL-250 (GG 25).
Body, STAF-SG: Ductile iron EN-GJS-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 TA.

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 according to table:

*) Notified body.

Face to face length:

ISO 5752 series 1, BS 2080 and EN 558-1 series 1.