Cast Steel Bolted Bonnet Gate Valves (API 600)

About this product

BOLTED BONNET VALVES Type: Gate Design Construction: API 600 Classes: 150-300-600-900 and 1500 lbs Testing according to API 598 Marking to MSS SP25 Outside Screw and Yoke (OS&Y) Self aligning packing gland in two parts Screwed back seat Welded seat rings Integral flexible wedge Flanges according to ASME B16.5 Butt Welding Ends according to ASME B16.25 GATE VALVES CLASS 150 GATE VALVES CLASS 600 1 - Thrust ball bearing for 8" and larger only. 2 - Yoke for 12" and larger only.

From the catalogue's introduction to this valve type: DESIGN, CONSTRUCTION, MARKING FOR BOLTED VALVES Bolted bonnet valves are designed and manufactured to withstand the most severe working condition of the oil-petrolchemical and power industries. The valves are in strict accordance with the API standard 600, ISO 10434, BS 1414, BS 1868, BS 1873 and ASME B16.34 where applicable. Design characteristics realised to swit the working conditions with high safety factor. Casting materials are rigidly checked to ensure quality and safety. Face to Face dimensions are in accordance with ASME B16.1O Butt Welding Ends machined to ASME B16.25. Marking according tro MSS SP25. Valves are manufactured and qualified in conformity with Pressure Equipment Directive 97/23/EC and ATEX 94/9/EC. Cast steel Valve design is developed using the latest software based analysis tools. At the design stage, all projects are analysed using 3D solid modelling tools. Benefits include reduction of development time and cost, improved product quality, and ability to solve field problems for customers. Product flexibility and accuracy is assured. BONNEY FORGE CHINA Finite Element Analysis (FEA) is a very important step at the development stage to ensure the best possible performance requirements. Valves operational problems, pressure/temperature-related deformations and flow-related forces within a valve can be evaluated. FEA is used for predicting failure due to unknown stresses by showing problem areas in a material and allowing designers to see all of the theoretical stresses within. This method of product design and testing is far superior to the manufacturing costs which would accrue if each sample was actually built and tested. The analyst also verify that analysis results conform to the physics of the problem under study. Understanding the response of a structure or manufactured product allows effective design decisions to be made in developing structures and products that are functional, meet all engineering requirements, and can be manufactured and assembled. Computational Fluid Dynamics (CFD) is used to simulate operating flow conditions. Evaluation of Valve CV coefficient and convective heat transfer coefficient takes place at the design stage. The cast steel body have at any point the wall thickness greater than the minimum specified on API 600. Particular attention has been given to the distribution of material to prevent stress concentration anywhere in the valve design. Seat rings are welded into the body. WEDGE - DISC The valves are equipped with: Gate valves: integral flexible wedge. Globe valves: plug type; on request parabolic or stop check type. Check valves: swing type. Standard packing is made with pure graphite pressed ring with on top and bottom of braided graphite with corrosion inhibitor to prevent damage of stress surface. Packing meet the Fugitive Emission requirements of API 624 and ISO 15848. Valves are available with hand wheel, bevel gear, spur gear ar actuator. Elettrical, pneumatic or hydraulic actuator can be supplied on customer request. Every valve is subjected to a pressure test in accordance with the API 598 or EN12266-1/2. The rated pressure for the applicable pressure class is in accordance with ASME B16.34. MARKING AND IDENTIFICATION Each valve is identified on proper name plate and on the valve body as required by MSS Name plate carries all information on rating, size, body material, customer tags. On body, marking includes material designation (per ASTM) and heat code, size, rating and the trade mark. Globe and check valves are supplementary marked with an arrow indicating flow direction. Valves can be supplied with by-pass according to MSS SP45, extension stem, floor stand, Limit switches, or others in accordance with customer request.