Abstract / scope
Specifies the requirements for valves of nominal sizes DN 10 up to DN 1 000 and nominal pressures PN 10 up to PN 100 having the following features: bolted bonnet, outside screw and yoke, inside screw (alternative for PN 10, 16, 20, 25 and 40 only), single or double obturator, wedge or parallel seating, with or without non-metallic obturator or seat seals, flanged or butt-welding ends.