Kolk - Butterfly Valves for Underground Installation

Kolk butterfly valves are made of ductile iron GJS-400/500 (DIN1693 GGG-40/50). Design acc. to EN 1074-2 and Kiwa BRL-K602/03 with flange drilling acc. to EN 1092-2 (ISO 7005-2). Face to face acc. to ISO 5752 / EN 558 basic series 13 (DIN 3202 F16). The butterfly valve is fitted with a gearbox for underground installation. Epoxy coating (Resicoat®) acc. to EN 14901 (DIN 30677-2) and GSK certified (RAL-GZ 662).