Danfoss 003Z0781 Pressure Independent Control Valve ABQM with Plugs 2" NPT

Description:

Danfoss 003Z0781 Pressure Independent Control Valve ABQM with Plugs 2" NPT 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 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 it's control and balance valves are virtually eliminated because of the built in automatic pressure control regulator. A wide selection of actuators are available for the AB‑QM providing further control features for the valve, making it an ideal selection for the simplest of two position control strategies to the precision required for modulating control and variable speed pump optimization. Features: AB‑QM maintains a stable flow through its range of operation unaffected by changes in system differential pressure 100 % valve authority allows lower pump head thantraditional valves and reduces energy consumption which increases ΔT Three required valve functions; 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. Benefits: Flow will match the load Eliminate coil over flows Installation of the AB‑QM reduces time and materials Simple flow setting procedure; reduced time involved for field commissioning Valve allows maximum coil and system differential temperature drops for optimum efficiency Operation costs reduced as much as 90 % or more when properly applied with variable speed pumping "Plug and Play" for quick setup for balancing allowing immediate start up of unit Commissioning accomplished without use of specialized equipment Compact design allows installations in areas with limited space such as stand alone fan coils