Automatic Balancing Valve | 9957W Series | Ductile Iron Wafer | Flanged Class 150
The 9957W Series Automatic Balancing Valve is engineered for precise flow control in hydronic HVAC systems. Constructed from ductile iron and designed to fit ASME B16.42 Class 150 flanges, this wafer-style valve delivers dependable performance across a wide range of flow rates.
Each valve comes pre-configured with one or more high-precision flow cartridges made of DZR brass, maintaining ±5% flow accuracy within a wide ΔP range of 2.0–33 psi. This smart cartridge system ensures consistent hydronic balancing under fluctuating pressure conditions—reducing overflows and pump energy consumption.
Working across flow rates from 25.4 GPM to 2,156 GPM, the 9957W is a versatile solution for medium to large commercial systems. It is factory tested and provided with test ports (plugged, not mounted) and an eyebolt (on DN≥4") for easy lifting and handling.
🔹Key Features:
- Ductile iron body rated for Class 150 flanges, built to ASTM A536 60-40-18 standard
- High-accuracy DZR brass cartridges for flow rates from 25.4 to 2,156 GPM
- No on-site balancing required — automatic cartridge regulation maintains ±5% flow accuracy
- Compact wafer-style design installs easily between flanges with a low profile
- Cartridges sized per valve — supports 1 to 14 individual cartridges depending on size
Technical Specifications
- Body Material: Ductile iron
- Flange Standard: ASME B16.42 Class 150
- Flow Range: 25.4–1,778 GPM (configurable)
-
Temperature Range:
- Water: 15°F–260°F
- Below 32°F: Requires antifreeze
- Above 212°F: Requires anti-boil additives
- Accessories: Eyebolts for DN≥4" valves
Dimension
Size | ØD [in] | A [in] | H [in] | # of Cartridge | Valve Wt.¹ [lb] | Cart. Wt.² [lb] | Flow Rate [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 | 25.4-1078 |
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 |
¹ Valve weight without cartridge
² Weight per single cartridge
Material
Part | Material | Specification |
---|---|---|
1 | Body | ASTM A536 60-40-18 |
2 | Blind cap | ASTM C35330 |
31 | Screw | Stainless Steel |
41 | Washer | Stainless Steel |
5 | Piston | Stainless Steel |
6 | Cartridge body | ASTM C35330 |
7 | Cartridge spring | AISI 302 |
8 | Cartridge O-ring | EPDM Perox |
9 | Eyebolt | Steel |
10 | Extension | ASTM C35330 |
112 | Test point | ASTM C35330 |
1 For 2½" and 3", Stainless Steel Spring is used instead of Screw and Washer
2 Test points include EPDM gaskets and polypropylene ties