The Delta Control Products ST2-3-57/DM24-53 is a valve and actuator assembly designed for flow control in HVAC systems. It features a 2-inch, 3-way characterized ball valve with a flow coefficient (Cv) of 57, suitable for managing water and steam flow in various applications. The valve is constructed with a forged brass body and stainless steel ball and stem, providing durability and reliable performance. It operates with a maximum water temperature of 284°F and supports steam applications up to 15 PSI, with a pressure rating of 580 PSI for the body and 200 PSI close-off.
The included DM24-53 actuator is a non-spring return model powered by a 24 VAC supply. It accepts incremental or proportional control signals and delivers 53 in-lb of torque, with a rotation time of approximately 90 seconds for a 90° turn. The actuator is equipped with a direct shaft mount, adjustable rotation stops, and optional auxiliary switches for additional control functions. This assembly is designed to provide efficient flow regulation and is compatible with various HVAC applications requiring precise fluid control.
2″ 3W 57Cv DM24-53 Act
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| Valve Type | 3-way characterized ball valve |
| Valve Size | 2 inches |
| Flow Coefficient (Cv) | 57 |
| Actuator Model | DM24-53 |
| Actuator Type | Non-spring return |
| Power Supply | 24 VAC |
| Control Signal | Incremental or proportional |
| Torque Output | 53 in-lb (6 Nm) |
| Rotation Time | 90 seconds for 90° at 60 Hz |
| Temperature Rating | Up to 284°F (140°C) for water; up to 15 PSI for saturated steam |
| Pressure Rating | 580 PSI body; 200 PSI close-off |
| Leakage | ANSI Class IV (<0.01%) |
| Rangeability | >500:1 |
| Features | Blowout-proof stem, double O-ring stem seal, self-centering stem bushing, maintenance-free design |