Valve Insulation is Poly ISO Cyanurate (PIR) with density higher than 70 kg/m3. It is suitable for an operating temperature range of -40°C to 120° C. The insulation is protected by a cladding of HDPE to ensure life of the PIR and to avoid peeling and damage. The insulation has Class P fire performance as per H5476 part 5 for ignitability and mean flame spread of less than 125mm. This identifies the material as Self Extinguishing with fire retardant properties. Pre-Insulated save a lot of efforts at site in the Insulation process as well as saves cost and energy. In Insulation cladding, aluminium/HDPE options also available. Insulation is done such that mounting bolts for the valve are fully enclosed by valve insulation. Standard flanges and bolts can be Accessories used with no change in flange insulation method. Flange bolts shall be tightened directly on metal surface of flange and not on top of insulation.