Danfoss RTR-FN — fixed-capacity valve (no presetting), OEM order code 013G7009. The RTR-FN is a fixed-capacity thermostatic radiator valve body for two-pipe systems without presetting — the flow is fixed by the valve's own Kv characteristic rather than an adjustable presetting device. It accepts an RA/RTR-series thermostatic sensor or actuator on the valve clamp connection. (RTR-FN DN 20, horizontal angle, dimension standard D.) Nominal size DN 20, horizontal angle pattern, connection Rp 3/4 (inlet) / R 3/4 (outlet) (internal thread), Kvs 1 m³/h, max. working pressure 10 bar, test pressure 16 bar, max. differential pressure 0.6 bar, flow temperature up to 120 °C. Finish Nickel plated. Application: 2-pipe system. Net weight 0.409 Kilogram. Genuine Danfoss part; technical data quoted verbatim from store.danfoss.com (code 013G7009). OEM P/N 013G7009, EAN 5702425126154. HS 8481.80.