BS EN ISO 10434:2004 - Page 2

Bolted bonnet steel gate valves for the petroleum, petrochemical and allied industries. | Status: Superseded, Withdrawn

1 Scope This International Standard specifies the requirements for a heavy-duty series of bolted bonnet steel gate valves for petroleum refinery and related applications where corrosion, erosion and other service conditions would indicate a need for full port openings, heavy wall sections and large stem diameters. This International Standard sets forth the requirements for the following gate valve features:

• — bolted bonnet;
• — outside screw and yoke;
• — rising stems;
• — non-rising handwheels;
• — single or double gate;
• — wedge or parallel seating;
• — metallic seating surfaces;
• — flanged or butt-welding ends.

It covers valves of the nominal sizes DN:

• — 25; 32; 40; 50; 65; 80; 100; 150; 200; 250; 300; 350; 400; 450; 500; 600;

corresponding to nominal pipe sizes NPS:

• — 1; 11/4; 11/2; 2; 21/2; 3; 4; 6; 8; 10; 12; 14; 16; 18; 20; 24;

and applies for pressure Class designations:

• — 150; 300; 600; 900; 1500; 2500.