A thermostatic radiator valve comprises a valve body (1) having a valve seat (5) disposed between input and output connections (2 and 3) to the valve, a valve closure member (6) adjustably disposed adjacent the valve seat (5) for controlling flow through the valve, a valve spindle (11) spring mounted in the valve body (1) on one end (10) of which the valve closure member (6) is disposed, and a thermostatic radiator valve head (not shown) mounted on the valve body (1) which is operable on the other end (16) of the valve spindle (11) for controlling the operation of the valve. The valve closure member (6) comprises a bush (7) having a resilient member (8) for contacting the valve seat (5) rigidly secured to it, the metallic bush (7) being disposed on a reduced diameter end portion (10) of the spindle (11) and being rigidly attached to the spindle (11).