This website intends to use cookies to improve the site and provide you with a better browsing experience. If you select "continue" or continue to browse the site without customizing your choices, you agree to our use of cookies. Find out more about our cookie policy and how to refuse cookies by clicking here.

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.

Key features

Handwheel

Equipped with a digital read-out, the handwheel ensures accurate and straightforward balancing.

Self-sealing measuring points

For simple, accurate balancing.

Positive shut-off function

For easy maintenance.

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

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®.

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.

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.

Product Articles

Animations & Films

Use our interactive animations to simulate the effects of our innovative product as it would perform in your HVAC system. See our product films and learn more about how our products can help you. Click the play button to get started!

Text for Tenders