Fixed Orifice Balancing Valve | 9519 Series | Solder × Solder with Test Points | 300 PSI WOG
Fixed Orifice Balancing Valve | 9519 Series | Solder × Solder with Test Points | 300 PSI WOG
9519 Series Fixed Orifice Static Balancing Valves provide accurate flow control and system balancing for closed-loop hydronic heating and cooling systems. Designed to BS7350 standards, this solder-end model includes integrated test points and a Venturi insert for precise differential pressure measurement and dependable long-term operation.
Constructed from DZR brass (UNS C35330), the valve offers superior corrosion resistance, making it ideal for applications involving treated or aggressive water conditions. A multi-turn handwheel with memory stop allows easy, repeatable presetting, while solder connections simplify installation in copper piping systems.
Key Features & Benefits
- Solder × Solder Ends — Compliant with ASME B16.22 for quick, reliable soldered installation in hydronic circuits.
- DZR Brass Construction — Dezincification-resistant body and internals extend service life and resist corrosion.
- Integrated Venturi Insert — Provides accurate flow readings with stable differential pressure across test points.
- Multi-Turn Adjustment with Memory Stop — Enables fine-tuning and repeatable flow settings for system commissioning.
- Built-In Test Points — Supplied with EPDM Perox gaskets for easy high/low pressure measurement.
Pressure & Temperature Ratings
| Pressure Rating | Temperature Range |
|---|---|
| 300 PSI (WOG) | 15°F – 260°F |
Dimensions & Flow Range
| Size | Connection | H [in] | L [in] | B [in] | Weight [lb] | Flow Range [GPM] |
|---|---|---|---|---|---|---|
| 1/2" | Solder | 4.06 | 3.46 / 3.74 | 0.71 / 0.55 | 1.23 / 1.16 | 0.12 – 2.35 |
| 3/4" | Solder | 4.06 | 3.78 / 4.18 | 0.75 / 0.76 | 1.43 / 1.34 | 2.19 – 5.15 |
| 1" | Solder | 4.06 | 3.94 / 4.57 | 0.89 / 0.92 | 1.73 / 1.55 | 4.09 – 9.56 |
| 1-1/4" | Solder | 4.85 | 4.63 / 5.28 | 0.98 / 0.98 | 2.78 / 2.53 | 8.56 – 19.81 |
| 1-1/2" | Solder | 4.94 | 5.00 / 5.90 | 0.98 / 1.10 | 3.50 / 3.16 | 12.84 – 29.80 |
| 2" | Solder | 5.34 | 5.72 / 6.73 | 1.15 / 1.35 | 4.80 / 4.46 | 24.09 – 55.63 |
Values per BS7350. Flow ranges represent typical system balancing 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 | Disc¹ | DZR Brass | UNS C35330 |
| 6 | Disc O-Ring¹ | EPDM Perox | — |
| 7 | Shutter | DZR Brass | UNS C35330 |
| 8 | Stem O-Ring | EPDM Perox | — |
| 9 | Union¹ | DZR Brass | UNS C35330 |
| 10 | Stem | Brass | ASTM B124 C37700 |
| 11 | Bonnet | DZR Brass | ASTM C35330 |
| 12 | Stop Spring Ring | Spring Steel | — |
| 13 | Screw | Steel | — |
| 14 | Handwheel | ABS (Blue) | — |
| 15 | Nut | Steel / Zn Plated | — |
| 16 | Test Point² | DZR Brass | UNS C35330 |
¹ Only on 1-1/4”, 1-1/2”, and 2” sizes.
² Test points include EPDM Perox gaskets and polypropylene ties.
Applications: Suitable for balancing fan coils, terminal units, radiant floor loops, and chilled water systems in both commercial and residential HVAC systems.
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.