Danfoss 037N0058 is a two-way, normally closed, direct-acting flow control valve. It is designed for on-off control of coolant liquids in heating and air conditioning systems, and is suitable for a wide range of temperature and viscosity applications. This valve is available in several different sizes, ranging from ½” to 1” inlets and outlets. The valve incorporates an adjustable pressure drop ratio, allowing it to be used as a flow regulator. Other features include an adjustable orifice, an anti-friction sleeve, a PTFE coated disc, and a 316 stainless steel body. It also has anISO 2281- rated non-metallic diaphragm to ensure accurate control.