The Delta Control Products ST125-3-19 is a 1.25-inch, 3-way Soft Touch characterized ball valve designed for precise flow control in HVAC applications. It features a forged brass two-piece body with stainless steel balls and stems, suitable for water temperatures up to 284°F (140°C) and saturated steam up to 15 psi. The valve has a flow coefficient (Cv) of 19.4, ensuring efficient fluid handling. Its design includes a blowout-proof stem and mounting flange, combined with a double O-ring stem seal and self-centering stem bushing, providing quick and easy electric actuator field mounting while ensuring long life and leak-free performance. Graphite-reinforced PTFE seats backed with EPDM O-rings significantly reduce operating torque, allowing the use of economical actuators. All valve and actuator assemblies provide 200 psig close-off pressure while ensuring operation after long idle periods. Due to their cost-effective, reliable design, ST2 Series Ball Valves are maintenance-free.
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| Valve Size | 1.25 inches |
| Flow Coefficient (Cv) | 19.4 |
| Body Material | Forged Brass |
| Ball and Stem Material | Stainless Steel |
| Seat Material | Graphite-reinforced PTFE backed with EPDM O-rings |
| Flow Characteristic | Equal Percentage |
| Maximum Water Temperature | 284°F (140°C) |
| Maximum Steam Pressure | 15 psi |
| Close-off Pressure | 200 psig |
| Leakage | ANSI Class IV (<0.01%) |
| Rangeability | Greater than 500:1 |