STAF-SG – ANSI flanges

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.

Technical description

Application:

Heating (not steam) and cooling systems

Functions:

Balancing
Pre-setting
Measuring
Shut-off (The restriction cone for valve sizes DN 65-400 is pressure released).

Dimensions:

STAF: DN 65-150
STAF-SG: DN 20-400

Pressure class:

Class 150

Temperature:

Max. working temperature: 120°C
Min. working temperature: -20°C

Material:

Body: Ductile iron, EN-GJS-400-15 (~ ASTM A536 Grade 60-40-18. ISO 1083 Grade 400-15).
Bonnet: DN 20-150 AMETAL^®, DN 200-400 ductile iron.
Restriction cone: DN 20-200 AMETAL^®, DN 250-300 bronze, DN 350-400 silicon brass.
Spindle: AMETAL^®.
Seat seal: Cone with EPDM ring.
Bonnet bolts: Chromed steel.
Handwheel: DN 20-150 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:

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.

Flanges:

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.