Automatic Balancing Valve | 9957W Series | Ductile Iron Wafer | Flanged Class 150 | 25.4–2,156 GPM
Automatic Balancing Valve | 9957W Series | Ductile Iron Wafer | Flanged Class 150 | 25.4–2,156 GPM
9957W Series Automatic Balancing Valves deliver precise, pressure-independent flow regulation in commercial hydronic HVAC systems. Built from ASTM A536 ductile iron and designed for ASME B16.42 Class 150 flanges, this wafer-style valve ensures long-term durability, easy installation, and consistent flow control without field adjustment.
Each valve is equipped with high-accuracy DZR brass cartridges that maintain flow within ±5% accuracy across a 2–33 psi differential range. The modular cartridge system provides stable hydronic balance even under variable pressure conditions, improving energy efficiency and system performance.
Key Features & Benefits
- Automatic Flow Regulation — DZR brass flow cartridges maintain consistent GPM across changing ΔP values—no manual balancing required.
- Wide Flow Range — Covers flows from 25.4 to 2,156 GPM using single or multiple cartridge configurations for valves up to 12″.
- Durable Construction — Ductile iron body (ASTM A536 60-40-18) with dezincification-resistant brass cartridges ensures long life and corrosion resistance.
- Compact Wafer Design — Low-profile body installs easily between ASME Class 150 flanges; includes eyebolt for DN ≥ 4″ sizes.
- Temperature Versatility — Handles water temperatures from 15°F to 260°F. For below 32°F, use antifreeze; for above 212°F, use anti-boil additives.
Pressure & Temperature Ratings
| Media | Temperature Range | Working Pressure | ΔP Range |
|---|---|---|---|
| Water | 15°F – 260°F | ASME Class 150 | 2 – 33 psi |
Dimensions & Flow Data
| Size | ØD [in] | A [in] | H [in] | # of Cartridges | Valve Wt [lb] | Cart. Wt [lb] | Flow Range [GPM] |
|---|---|---|---|---|---|---|---|
| 2½″ | 4.69 | 6.69 | 6.38 | 1 | 9.0 | 3.0 | 25.4–154 |
| 3″ | 5.16 | 6.69 | 6.61 | 1 | 12.3 | 3.0 | 25.4–154 |
| 4″ | 6.42 | 8.27 | 7.24 | 2 | 18.5 | 3.0 | 25.4–308 |
| 5″ | 7.60 | 8.27 | 7.83 | 3 | 23.4 | 3.0 | 25.4–462 |
| 6″ | 8.50 | 8.27 | 8.27 | 4 | 27.6 | 3.0 | 25.4–616 |
| 8″ | 10.7 | 8.27 | 9.37 | 7 | 34.8 | 3.0 | 25.4–1,078 |
| 10″ | 12.9 | 8.27 | 10.5 | 10 | 49.2 | 3.0 | 25.4–1,540 |
| 12″ | 15.1 | 8.27 | 11.6 | 14 | 61.1 | 3.0 | 25.4–2,156 |
Material Construction
| # | Component | Material | Specification |
|---|---|---|---|
| 1 | Body | Ductile Iron | ASTM A536 60-40-18 |
| 2 | Blind Cap | DZR Brass | ASTM C35330 |
| 3 | Screw | Stainless Steel | — |
| 4 | Washer | Stainless Steel | — |
| 5 | Piston | Stainless Steel | — |
| 6 | Cartridge Body | DZR Brass | ASTM C35330 |
| 7 | Cartridge Spring | Stainless Steel | AISI 302 |
| 8 | O-Ring | EPDM Perox | — |
| 9 | Eyebolt | Steel | — |
| 10 | Extension | DZR Brass | ASTM C35330 |
| 11 | Test Point | DZR Brass | ASTM C35330 |
Applications: Ideal for HVAC hydronic circuits, chilled water systems, and heating loops requiring automatic balancing and accurate pressure-independent flow control.