What is the meaning of trim 8?
API 600 Gate Valve, WCB body, API 600 Trim no. 8 means the seat: A105 + Stellite, disc: WCB + 13Cr, Stem: ASTM A182 F6a.
What is trim number in valves?
Trim Number Removable/replaceable ,functional parts of the valve that are exposed to the flow medium such as stem,closure member and seating surfaces is termed as trim.(Valve body,bonnet,yoke does not include in trim) The number corresponding to material used in API 600 and API 602 are termed as Trim Numbers.
What is trim in ball valve?
Trim. Different ball valve parts together create the Trim. These parts are Disk, Sleeves, Seat (also known as seals ring), and Stem. Trim enables the ball valve to perform basic motions as well as providing flow control.
What is trim material of gate valve?
The valve trim material which refers to the various working parts of a valve such as the stem, wedge, disc, etc., are constructed of many different materials depending upon the pressure rating and service.
What is Stelliting process?
Stellite was a major improvement in the production of poppet valves and valve seats for the valves, particularly exhaust valves, of internal combustion engines. By reducing their erosion from hot gases, the interval between maintenance and re-grinding of their seats was dramatically lengthened.
What is api594?
API Std 594, Check Valves: Flanged, Lug, Wafer, and Butt-welding, is a standard developed and published by the American Petroleum Institute (API) that covers the design, materials, face-to-face dimensions, pressure-temperature ratings, and examination, inspection, and testing requirements for Type “A” and Type “B” …
What is the difference between API 600 and API 602?
API 600 requires a heavier wall for a given pressure rating than does ASME B16. 34. API 602 also requires a heavier wall for 150#, 300# & 600# classes than does B16. 34.
What is trim part?
The internal parts of the valve body, stem, seating material, package, disc, plug, back rings, etc., are collectively referred to as the trim. In other words, all wetted parts which can be removable and replaceable in the valve body are part of the control valve trim.
What is the function of a valve trim?
The trim plays a specially important role in case of a control valve. In a control valve the trim determines ‘characteristic of a valve’ or in other words how the flowrate through the valve changes depending on the valve opening.