9519AB DZR LF Brass Fixed Orifice Static Balancing Valve
The 9519AB DZR Lead-Free Brass Static Balancing Valve delivers precise flow regulation for HVAC and domestic water systems. Its fixed orifice venturi design ensures consistent performance, while the integral memory stop allows for repeatable adjustments. Certified to AB1953, NSF/ANSI 61 & 372, this valve meets strict safety standards for potable water applications.
Key Features
✔ Fixed Orifice Venturi Design – Ensures accurate flow measurement and system balancing (±3% tolerance, BS7350 tested)
✔ DZR Lead-Free Brass Construction – Complies with NSF/ANSI 61 & 372 for safe drinking water use
✔ Adjustable Handwheel with Memory Stop – Multi-turn adjustment (4+ full turns) for precise tuning
✔ 300 WOG Pressure Rating – Built to withstand high-pressure conditions
✔ Flexible Installation Options – Choose threaded (NPT, ASME B1.20.1) or solder joint (ASME B16.22) ends
Technical Specifications
- Material: DZR Lead-Free Brass (ASTM B927 C27453)
- Pressure Rating: 300 WOG
-
Temperature Range:
- Water: 15°F to 260°F (antifreeze required below 32°F; anti-boiling additives above 212°F)
-
Available Flow Ranges (Upon Request):
- Ultra Low (ABU): 0.27–0.71 GPM
- Low Flow (ABL): 0.49–1.17 GPM
Available Models
🔹 9517AB: Threaded ends (NPT) with test points
🔹 9519AB: Solder joint ends with test points
Ideal Applications
✅ HVAC system balancing
✅ Domestic water distribution (residential & commercial)
✅ Potable water systems requiring lead-free compliance
Why Choose This Valve?
- Certified Safe: Meets NSF/ANSI 61 & 372 for drinking water
- Precision Control: Venturi insert ensures accurate flow measurement
- Built to Last: Robust brass construction for long-term reliability
Perfect for engineers and contractors who demand accuracy and compliance.
Dimension, Weight
| Size | N | ΦC¹ [m] | H [m] | L² [m] | B² [m] | Weight² [lb] | Flow range [GPM] |
|---|---|---|---|---|---|---|---|
| U-½² | ½ - 14 NPT | 0.627-0.631 | 4.06 | 3.46/3.74 | 0.71/0.55 | 1.23/1.16 | 0.27-0.71 |
| L-½² | ½ - 14 NPT | 0.627-0.631 | 4.06 | 3.46/3.74 | 0.71/0.55 | 1.23/1.16 | 0.49-1.17 |
| ½² | ½ - 14 NPT | 0.627-0.631 | 4.06 | 3.46/3.74 | 0.71/0.55 | 1.23/1.16 | 0.98-2.35³ |
| ¾² | ¾ - 14 NPT | 0.877-0.881 | 4.06 | 3.78/4.18 | 0.75/0.76 | 1.43/1.34 | 2.19-5.15³ |
| 1" | 1 - 11.5 NPT | 1.128-1.131 | 4.06 | 3.94/4.57 | 0.89/0.92 | 1.73/1.55 | 4.09-9.56³ |
| 1½² | 1½ - 11.5 NPT | 1.378-1.381 | 4.85 | 4.63/5.28 | 0.98/0.98 | 2.78/2.53 | 8.56-19.81³ |
| 1½² | 1½ - 11.5 NPT | 1.628-1.632 | 4.94 | 5.00/5.90 | 0.98/1.10 | 3.50/3.16 | 12.84-29.80³ |
| 2" | 2 - 11.5 NPT | 2.128-2.132 | 5.34 | 5.72/6.73 | 1.15/1.35 | 4.80/4.46 | 24.09-55.63³ |
Material
| Part | Material | Specification |
|---|---|---|
| Body | DZR Lead Free Brass | ASTM B927 C27453 |
| Venturi insert | DZR Lead Free Brass | ASTM B927 C27453 |
| Balancing cone | DZR Lead Free Brass | ASTM B927 C27453 |
| Gasket disc | PTFE | - |
| Disc¹ | DZR Lead Free Brass | ASTM B927 C27453 |
| Disc O-ring¹ | EPDM Perox | - |
| Shutter | DZR Lead Free Brass | ASTM B927 C27453 |
| Stem O-ring | EPDM Perox | - |
| Union¹ | DZR Lead Free Brass | ASTM B927 C27453 |
| Stem | Brass | ASTM B124 C37700 |
| Bonnet | DZR Lead Free Brass | ASTM B927 C27453 |
| Stop spring ring | Spring steel | - |
| Screw | Steel | - |
| Handwheel | ABS (blue) | - |
| Nut | Steel / Zn plated | - |
| Test point | DZR Brass² | UNS C35330 |
Headloss
| Handwheel Position | U-½" | L-½" | ½" | ¾" | 1" | 1¼" | 1½" | 2" |
|---|---|---|---|---|---|---|---|---|
| 0.5 | 0.177 | 0.160 | 0.474 | 0.47 | 1.70 | 2.96 | 3.14 | 6.20 |
| 0.7 | 0.206 | 0.186 | 0.474 | 0.54 | 2.00 | 3.38 | 3.61 | 7.56 |
| 1.0 | 0.283 | 0.287 | 0.613 | 0.67 | 2.42 | 3.95 | 4.27 | 9.65 |
| 1.3 | 0.331 | 0.394 | 0.717 | 0.81 | 2.82 | 4.49 | 4.96 | 12.19 |
| 1.5 | 0.355 | 0.440 | 0.809 | 0.90 | 3.12 | 4.83 | 5.57 | 14.30 |
| 1.7 | 0.387 | 0.501 | 0.902 | 0.99 | 3.48 | 5.25 | 6.60 | 16.64 |
| 2.0 | 0.445 | 0.586 | 0.99 | 1.12 | 4.13 | 6.27 | 8.99 | 20.17 |
| 2.3 | 0.511 | 0.67 | 1.10 | 1.25 | 4.83 | 7.82 | 12.08 | 23.35 |
| 2.5 | 0.517 | 0.70 | 1.18 | 1.39 | 5.28 | 9.16 | 14.21 | 25.12 |
| 2.7 | 0.527 | 0.74 | 1.32 | 1.62 | 5.63 | 10.46 | 16.34 | 26.66 |
| 3.0 | 0.563 | 0.83 | 1.60 | 2.24 | 6.09 | 12.21 | 18.89 | 28.72 |
| 3.3 | 0.578 | 0.86 | 1.88 | 2.94 | 6.49 | 13.39 | 20.67 | 30.57 |
| 3.5 | 0.594 | 0.89 | 2.03 | 3.39 | 6.64 | 13.94 | 21.54 | 31.72 |
| 3.7 | 0.595 | 0.92 | 2.12 | 3.75 | 6.80 | 14.34 | 22.16 | 32.86 |
| 4.0 | 0.603 | 0.95 | 2.19 | 4.06 | 7.10 | 14.50 | 22.65 | 34.36 |
| 4.4 | 0.605 | 0.98 | 2.22 | 4.24 | 7.21 | - | - | - |