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STAF, STAF-SG

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.

Product Information

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:

Marking
STAF
STAF-SG
(PN 16)
STAF-SG
(PN 25)
CE
DN 65-150
DN 200
DN 50-125
CE 0409*
DN 250-400
DN 150-400

*) 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.

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