The RLV range of lockshield valves provides a matching return mounted lockshield/isolation valve for use in commercial heating systems. The valve body design and finish matches that of all RA2000 services valve bodies, including RA-FN, RA-G and RA-N. RLV lockshield valves Combine the functions of isolation and regulation Into a single valve body. Selected models are available with an Integrated drain-cock connection that can be used together with a drain-cock accessory, which is purchased separately. Adjustment of the lockshield valve is by means of a 6mm allen key. The setting cover is nickel plated brass, which is screwed onto the valve body.