Steel gate valve 502 – API 600

Available configurations

• Sizes: NPS 2-48;
• Pressure classes: ASME Class 150, 300 and 600;
• End connections: flanged RF or RTJ, or butt-weld (BW);
• Function: flow isolation.

Availability of each size, class, material and end-connection combination depends on the selected API 600 or API 603 construction. Larger NPS configurations may be evaluated separately to a specified ASME design basis; they are not included in the API 600 range stated above.

Choose the design

Design features

• Bolted bonnet and metallic seating surfaces;
• Solid or flexible wedge according to the specified design;
• Outside screw and yoke (OS&Y) with rising stem for the API 600/API 603 configurations described on this page;
• Selected body, wedge, seat and stem materials for the operating medium;
• Handwheel, gearbox or powered actuation according to the size and required operating torque.

Process media

Petroleum products, process liquids, steam and other industrial media. Suitability for corrosive chemicals, sour service or gases is determined for the specified materials, operating conditions and project requirements.

Body material options

* The applicable design standard is established for the actual valve construction; stainless steel alone does not determine whether a valve is API 600 or API 603. EN numbers are material references, not automatic substitutions for the ASTM grade specified in the order.

For a specified forged-body configuration, material options can include ASTM A105, A350 LF2, A182 F304, F304L, F316 or F316L. Forged and cast grades are identified separately in the valve datasheet and material documentation.

API 600 trim options

This table describes API 600 trim selections. F6a, F304 and F316 identify representative ASTM A182 stem grades; the complete trim, including base materials and any hardfacing, is defined in the order documentation. For an API 603 valve, wedge, seat and stem materials are specified for that particular construction rather than assigned this API 600 trim table by default.

Applicable standards

• Valve design: API 600 or API 603, as specified for the ordered construction; ASME B16.34 for applicable pressure-temperature ratings and valve requirements;
• Face-to-face or end-to-end dimensions: ASME B16.10, where a standard dimension applies;
• Flanged connections: ASME B16.5, with RF or RTJ facing as specified in the order;
• Butt-weld ends: ASME B16.25, with the pipe wall thickness and end preparation specified for the connection;
• Inspection and testing: API 598; seat leakage acceptance criterion stated in the valve specification.

Additional requirements and selection

Fire type-testing to ISO 10497 or API 6FA, and other project-specific requirements, can be specified where a qualified valve design is available.

Please specify the design standard, NPS, ASME Class, body material, trim, process medium, operating temperature, RF/RTJ or BW connection, and actuation. The allowable operating pressure and temperature are determined for the selected valve materials and construction.