STAV
Balancing valve DN 15-50 with venturi orifice
The STAV balancing valve delivers accurate hydronic performance in an impressive range of applications. Ideally suited for use on the secondary side in heating, cooling, and tap water systems.
Features & Benefits
Self-sealing measuring points
For simple, accurate balancing.
Handwheel
Equipped with a digital read-out, the handwheel ensures accurate and straightforward balancing.
Venturi orifice
For more accurate flow readings than traditional orifice plates and low permanent pressure loss.
Technical Information
Applications:
Heating and cooling systems.
Tap water systems.
Functions:
Balancing
Pre-setting
Measuring
Shut-off
Dimensions:
DN 15-50
Pressure class:
PN 20
Temperature:
Max. working temperature: 120°C
Min. working temperature: -20°C
Media:
Water or neutral fluids, water-glycol mixtures (0-57%).
Material:
Valve body and bonnet: AMETAL®
Sealing (body/bonnet): EPDM O-ring
Valve plug: AMETAL®
Seat seal: EPDM O-ring
Spindle: AMETAL®
Slip washer: PTFE
Spindle seal: EPDM O-ring
Spring: Stainless steel
Handwheel: Polyamide and TPE
Measuring points: AMETAL®
Sealings: EPDM
Caps: Polyamide and TPE
AMETAL® is the dezincification resistant alloy of IMI Hydronic Engineering.
Marking:
Body: TA, PN 20, DN and inch size.
Handwheel: Valve type and DN.
Marking ring on measuring point:
Normal flow (MD 71): Black, 120°C, Kvsignal
Low flow (MD 72): White, 120°C, Kvsignal
Ultra low flow (MD 73): Blue, 120°C, Kvsignal
Connection:
Female thread according to ISO 228.
Thread length according to ISO 7/1.
Articles
Thread according to ISO 228. Thread length according to ISO 7/1.
With female threads
Thread according to ISO 228. Thread length according to ISO 7/1.
DN | D* | L | H | Kvmax | Kvsignal | l/h** | l/s** | Kg | EAN | Article No |
Normal flow (MD 71) | ||||||||||
15* | G1/2 | 113 | 100 | 1.75 | 1.25 | 125-395 | 0.035-0.110 | 0.58 | 7318793818607 | 52 572-015 |
20* | G3/4 | 122 | 100 | 3.98 | 2.70 | 270-854 | 0.075-0.237 | 0.69 | 7318793818904 | 52 572-020 |
25 | G1 | 137 | 105 | 6.46 | 5.00 | 500-1581 | 0.139-0.439 | 0.92 | 7318793819000 | 52 572-025 |
32 | G1 1/4 | 156 | 110 | 11.43 | 10.4 | 1040-3289 | 0.289-0.914 | 1.3 | 7318793819109 | 52 572-032 |
40 | G1 1/2 | 168 | 120 | 15.8 | 15.6 | 1560-4933 | 0.433-1.370 | 1.8 | 7318793819208 | 52 572-040 |
50 | G2 | 206 | 120 | 29.3 | 29.7 | 2970-9392 | 0.825-2.609 | 2.9 | 7318793819307 | 52 572-050 |
Low flow (MD 72) | ||||||||||
15* | G1/2 | 113 | 100 | 0.821 | 0.540 | 54-171 | 0.015-0.047 | 0.58 | 7318793818706 | 52 572-115 |
Ultra low flow (MD 73) | ||||||||||
15* | G1/2 | 113 | 100 | 0.319 | 0.208 | 21-66 | 0.006-0.018 | 0.58 | 7318793818805 | 52 572-215 |
→ = Flow direction
*) Can be connected to smooth pipes by KOMBI compression coupling. If using pipes smaller than valve size – contact IMI Hydronic Engineering. For further information of KOMBI – see catalogue leaflet KOMBI.
**) Recommended flow rate. Min. flow rate is based upon a measured pressure drop of 1 kPa.
Kvmax is the Kv value for the total valve.
Kvsignal is the Kv value used for flow measuring.
