The 9519AB Fixed Orifice Static Balancing Valve by Red-White Valve Corp is the professional’s choice for precise hydronic balancing in both HVAC and domestic water applications. Engineered from DZR (Dezincification-Resistant) lead-free brass, this valve ensures safe potable water use while meeting stringent NSF/ANSI 61 & 372, AB1953, and BAA requirements.
Key Features:
- Fixed orifice design with factory-calibrated Venturi insert for accurate flow measurement
- DZR lead-free brass body (ASTM B927 C27453) for corrosion and dezincification resistance
- Positive shut-off with memory stop and multi-turn adjustment (4+ full turns) for repeatable settings
- Built-in test points with EPDM Perox gaskets and polypropylene ties
- Solder joint ends (ASME B16.22) for permanent, leak-free installations
- Working pressure: 300 WOG
- Temperature range: 15°F to 260°F (with suitable antifreeze/anti-boil fluids beyond standard limits)
- Fully compliant with the U.S. Drinking Water Act standard for lead content (<0>
Performance & Precision:
Designed to BS7350 standards, the 9519AB offers:
- Flow tolerance accuracy within ±3% Cv
- Presetting capability using flow and headloss charts
- Smooth handwheel adjustment from position 0.5 to 4.4
- Suggested flow ranges up to 55.63 GPM (2” model)
Use the included test points to easily connect differential pressure sensors and determine precise GPM using the formula:
Q = Cv × √Δp
For best performance, install with straight pipe lengths before and after the valve (5x & 2x pipe diameter minimum, respectively).
Sizes Available:
- ½” to 2” solder-end connections
- See full flow range chart for each size to select the right fit for your system
Materials Breakdown:
- Body, Venturi insert, and balancing cone: DZR Lead-Free Brass
- Disc gasket: PTFE
- O-rings: EPDM Peroxide-Cured
- Handwheel: Durable ABS (blue)
Ideal Applications:
- Commercial and residential HVAC systems
- Hydronic heating and cooling loops
- Domestic potable water systems
- Systems requiring accurate static balancing and flow verification
Certifications & Compliance:
- NSF-61 / NSF-372 Certified
- AB1953 Lead-Free Compliant
- Meets BAA (Buy American Act) requirements
- Dezincification Resistant (DZR) Brass Construction
⚠ California Prop 65 Warning:
This product can expose you to chemicals including lead, known to the State of California to cause cancer and reproductive harm. Learn more at www.P65Warnings.ca.gov.
Material
| Part No. | Component | Material | Specification |
|---|---|---|---|
| 1 | Body | DZR Lead-Free Brass | ASTM B927 C27453 |
| 2 | Venturi Insert | DZR Lead-Free Brass | ASTM B927 C27453 |
| 3 | Balancing Cone | DZR Lead-Free Brass | ASTM B927 C27453 |
| 4 | Gasket Disc | PTFE | – |
| 5 | Disc 1 | DZR Lead-Free Brass | ASTM B927 C27453 |
| 6 | Disc O-ring 1 | EPDM Perox | – |
| 7 | Shutter | DZR Lead-Free Brass | ASTM B927 C27453 |
| 8 | Stem O-ring | EPDM Perox | – |
| 9 | Union 1 | DZR Lead-Free Brass | ASTM B927 C27453 |
| 10 | Stem | Brass | ASTM B124 C37700 |
| 11 | Bonnet | DZR Lead-Free Brass | ASTM B927 C27453 |
| 12 | Stop Spring Ring | Spring Steel | – |
| 13 | Screw | Steel | – |
| 14 | Handwheel | ABS (Blue) | – |
| 15 | Nut | Steel, Zinc Plated | – |
| 16 | Test Point 2 | DZR Brass | UNS C35330 |
1 Only on 1¼”, 1½” and 2” sizes
2 Test points include EPDM Perox gaskets and polypropylene ties
Dimension, Weight
| Size | Thread (N) | ØC1 [in] | H [in] | L2 [in] | B2 [in] | Weight2 [lb] | Flow Range3 [GPM] |
|---|---|---|---|---|---|---|---|
| U-½” | 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-½” | 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 |
| 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 |
1 Tolerance field
2 Threaded ends / solder ends
3 Suggested flow range applicability (BS7350)
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 | – | – | – |
Formula linking flow Q (in GPM) and theoretical valve headloss Δp (in psi).
Cv depends on handwheel position as indicated in the table above.
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