Hydronic Static Balancing Valve | 9517AB Series | Threaded FNPT × FNPT | DZR Lead-Free Brass
Hydronic Static Balancing Valve | 9517AB Series | Threaded FNPT × FNPT | DZR Lead-Free Brass
The Red-White Valve 9517AB Fixed Orifice Static Balancing Valve provides precise flow control for hydronic heating, cooling, and potable water systems. Designed from DZR (Dezincification-Resistant) lead-free brass and certified to NSF/ANSI/CAN 61 & 372 and AB1953, it ensures safe and accurate balancing performance in commercial and residential HVAC applications.
Key Features & Benefits
- Fixed Orifice Venturi Design — Factory-calibrated insert ensures precise differential pressure measurement and repeatable flow accuracy (±3% Cv).
- Positive Shut-Off with Memory Stop — Multi-turn adjustment (4+ full turns) allows reliable repeatable settings for system commissioning.
- Dual Pressure Test Points — Includes high and low differential test ports with EPDM Perox seals for easy Δp measurement.
- DZR Lead-Free Brass Body — ASTM B927 C27453 construction resists corrosion and dezincification for extended service life.
- Threaded FNPT × FNPT Ends — ASME B1.20.1 compliant female NPT connections for easy retrofit or new installation.
- Precision Engineered for HVAC Use — Designed per BS7350 standard with flow ranges from 0.27 to 55.63 GPM depending on size.
- 300 PSI WOG Rating — Supports demanding hydronic and domestic water system pressures.
- Wide Temperature Range — Operates from 15°F to 260°F; compatible with antifreeze or anti-boil additives.
Performance & Operation
Use included test points to connect a differential pressure sensor and determine flow using:
Q = Cv × √Δp
For optimal performance, install with straight pipe lengths of at least 5× the pipe diameter before and 2× after the valve (10× if installed at a pump outlet).
Flow Range & Dimensions
| Size | Thread (NPT) | ØC [in] | H [in] | L [in] | B [in] | Weight [lb] | Flow Range [GPM] |
|---|---|---|---|---|---|---|---|
| ½″ | ½–14 NPT | 0.627–0.631 | 4.06 | 3.46 / 3.74 | 0.71 / 0.55 | 1.23 / 1.16 | 0.98–2.35 |
| ¾″ | ¾–14 NPT | 0.877–0.881 | 4.06 | 3.78 / 4.18 | 0.75 / 0.76 | 1.43 / 1.34 | 2.19–5.15 |
| 1″ | 1–11.5 NPT | 1.128–1.131 | 4.06 | 3.94 / 4.57 | 0.89 / 0.92 | 1.73 / 1.55 | 4.09–9.56 |
| 1¼″ | 1¼–11.5 NPT | 1.378–1.381 | 4.85 | 4.63 / 5.28 | 0.98 / 0.98 | 2.78 / 2.53 | 8.56–19.81 |
| 1½″ | 1½–11.5 NPT | 1.628–1.632 | 4.94 | 5.00 / 5.90 | 0.98 / 1.10 | 3.50 / 3.16 | 12.84–29.80 |
| 2″ | 2–11.5 NPT | 2.128–2.132 | 5.34 | 5.72 / 6.73 | 1.15 / 1.35 | 4.80 / 4.46 | 24.09–55.63 |
Material Breakdown
| Component | Material | Specification |
|---|---|---|
| Body / Venturi / Balancing Cone | DZR Lead-Free Brass | ASTM B927 C27453 |
| Disc & Union (Larger Sizes) | DZR Lead-Free Brass | ASTM B927 C27453 |
| Gasket Disc | PTFE | – |
| O-Rings | EPDM Perox 70 SH | NSF Approved |
| Stem | Brass | ASTM B124 C37700 |
| Handwheel | ABS (Blue) | – |
| Test Points | DZR Brass | UNS C35330 |
Certifications & Compliance
- NSF/ANSI/CAN 61 & 372 Certified
- AB1953 Lead-Free Compliant
- BAA (Buy American Act) Compliant
- Dezincification-Resistant (DZR) Brass
Warning (California Prop 65): This product can expose you to chemicals including lead, known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.