AB-QM
The AB-QM temperature control valve provides pressure independent regulation of flow while also providing flow limiting system balance. The valve internally contains a unique differential pressure regulator which automatically adjusts to normal changes in system pressure from valves opening and closing or changing of pump speed. As a result of maintaining a constant pressure for the temperature control valve, valve authority is maintained at 100%. This allows for precise interaction with the temperature controller and unparalleled system operation as indicated by assuring the highest possible coil log mean temperature difference (ΔT). The valve is easily set and adjusted to provide the precise flow required for each terminal unit. Design calculation and commissioning effort normally required for its control and balance valves are virtually eliminated because of the built-in automatic pressure control regulator.
Features and benefits
- AB-QM maintains a stable flow through its range of operation unaffected by changes in system differential pressure period. 100% valve authority allows lower pump head than traditional valves and reduces energy consumption which increases ΔT
- Three required valve functions; temperature control, balance and flow limitation in one compact valve design
- Flow parameter is the only consideration, reducing valve selection engineering
- Constant flow regulation limitation through independent pressure balancing
- User adjustable flow setting for maximum flow limitation
- Maintains linear characteristic of flow when installed with a Danfoss proportional actuator. Actuator options with equal percentage flow characteristics
- Flow will match the load
- Eliminate coil over flows
- Reduced installation time and materials
- Simple flow setting procedure; reduced time involved for field commissioning