Danfoss VFG 21 2-way flanged globe (seat) valve body, OEM order code 065B2503. Nominal size DN20, pressure class PN 16, flow coefficient Kvs 6.3 m³/h. The VFG 21 is a two-way pressure-relieved valve body (function "Pressure relief"), the body element of Danfoss pressure / differential-pressure / flow controllers. It pairs with a matched self-acting (AFA / AFP / AFT / AVT) or electric (AMV / AME) actuator to form a temperature, pressure, differential-pressure or flow controller. Grey cast iron EN-GJL-250 (GG-25) body with stainless-steel, mat. no. 1.4404 cone and stainless-steel, mat. no. 1.4021 seat, EPDM sealing, linear optimized flow characteristic, 6 mm stroke, spindle normally open. Rated for district heating media at 2 °C to 150 °C, maximum differential pressure 16 bar. Data quoted verbatim from store.danfoss.com (code 065B2503).