Hydronic Static Balancing Valve | 9517T Series | FNPT Union × Tailpiece | 300 PSI WOG
Hydronic Static Balancing Valve | 9517T Series | FNPT Union × Tailpiece | 300 PSI WOG
9517T Series Fixed Orifice Static Balancing Valves deliver precise, repeatable flow balancing in closed-loop hydronic systems. Engineered with an internal Venturi insert for stable ΔP measurement, this DZR brass valve supports multiple union tailpiece configurations — including FNPT, MNPT, Solder, PEX (F1960), and Press connections — for flexible installation across commercial or retrofit projects.
Each valve meets BS7350 standards with ±3% Cv tolerance, features a lockable memory stop for repeatable settings, and handles 300 PSI WOG at temperatures from 15°F to 260°F. The multi-turn handwheel design ensures smooth adjustment and reliable control in HVAC balancing, terminal unit flow regulation, and energy optimization systems.
Key Features & Benefits
- DZR Brass Construction — Built from dezincification-resistant UNS C35330 brass for exceptional corrosion resistance and long-term reliability.
- Precision Venturi Insert — Integrated flow stabilizer ensures accurate pressure drop readings and predictable balancing performance.
- Union Ends with Flexible Tailpieces — Accepts FNPT, MNPT, Solder, Press, and PEX (F1960) connections for maximum installation flexibility.
- Multi-Turn Handwheel with Memory Stop — Allows repeatable, locked-in flow settings during system commissioning and maintenance.
- Wide Operating Range — Rated for 15°F–260°F; compatible with antifreeze or anti-boil treated water in hydronic circuits.
Pressure & Temperature Ratings
| Pressure Rating | Temperature Range |
|---|---|
| 300 PSI (WOG) | 15°F – 260°F |
Dimensions & Flow Range (FNPT Union × Tailpiece)
| Size | C [in] | H [in] | L [in] | Weight [lb] | Flow Range [GPM] |
|---|---|---|---|---|---|
| X-1/2" | 0.64 | 4.06 | 5.84 | 1.66 | 0.12–0.36 |
| U-1/2" | 0.64 | 4.06 | 5.84 | 1.66 | 0.27–0.71 |
| L-1/2" | 0.64 | 4.06 | 5.84 | 1.66 | 0.49–1.17 |
| 1/2" | 0.64 | 4.06 | 5.84 | 1.66 | 0.98–2.35 |
| 3/4" | 0.89 | 4.06 | 6.00 | 1.98 | 2.19–5.15 |
| 1" | 1.14 | 4.06 | 6.65 | 2.48 | 4.09–9.56 |
Values based on BS7350 standard. Flow ranges represent suggested operational limits.
Material Construction
| # | Part | Material | Specification |
|---|---|---|---|
| 1 | Body | DZR Brass | UNS C35330 |
| 2 | Venturi Insert | DZR Brass | UNS C35330 |
| 3 | Balancing Cone | DZR Brass | UNS C35330 |
| 4 | Gasket Disc | PTFE | — |
| 5 | Shutter | DZR Brass | UNS C35330 |
| 6 | Stem O-Ring | EPDM Perox | — |
| 7 | Stem | Brass | ASTM B124 C37700 |
| 8 | Bonnet | DZR Brass | UNS C35330 |
| 9 | Stop Spring Ring | Spring Steel | — |
| 10 | Screw | Steel | — |
| 11 | Handwheel | ABS (Blue) | — |
| 12 | Nut | Steel / Zn Plated | — |
| 13 | Test Point¹ | DZR Brass | UNS C35330 |
| 14 | Union Nut | Brass | ASTM B283 C37700 |
| 15 | Union O-Ring | EPDM Perox | — |
| 16 | Tailpiece² | DZR Brass | UNS C35330 |
¹ Test points include EPDM Perox gaskets and polypropylene ties.
² Tailpieces available in FNPT, MNPT, Solder, Press, and PEX (F1960) configurations.
Applications: Designed for hydronic balancing, HVAC terminal units, radiant heating, and chilled water systems where accurate flow control and pressure measurement are required.
Warning (California Prop 65): This product can expose you to chemicals including lead, known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.