Gate valve: solid or flexible wedge - Valve engineering - Eng-Tips
2003年3月12日 · Solid wedge: metal wedge with metal to metal seating. There are some hundreds (thousends?) of types and variations, but on a general basis (European): Soft sealing gate valves (flexible wedge gate valves) main group from DN40(mm) up to most commonly used 250mm to 300mm (6-8inches) but readily avilable up to at least 1200mm.
Gate valve, wedge - Valve engineering | Eng-Tips
2009年9月24日 · In the valve specifications that I have, the solid wedge is used for all diameters in 150# and for diameters lesser than 2" for 300# to 2500#; from 300# until 900# the flexible wedge is used for diameters bigger than 2"; for 1500# and 2500#, the parallel slide or double disc is used for diameters bigger than 2".
GATE VALVE WITH SOLID 13 CHROME WEDGE AND SEAT RINGS 1 …
2011年6月9日 · This could mean a solid 13%cr wedge but also a solid WCB wedge with a 13%Cr facing should work also. Disclosure I work for Powell valve and on our class 150 gate valves in the 2 through 6" size we do use a solid A217 CA15 wedge (13%Cr) For the most part this is a pretty standard stock class 150 gate valve spec.
20 inche gate valve with SOLID WEDGE - Eng-Tips
2012年12月20日 · If you were to have a solid wedge, and an angular misalignment of 1 degree, for a 20" valve, this is a significant reduction in seating contact, which could potentially result in leakage. For smaller valves, it is easier to achieve the seat to disc alignment, thus a …
Gate Valve with solid wedge complying to NACE MR-01-75 2
2012年12月20日 · My client says that he require Gate valve with solid wedge complying to NACE MR-01 75. I informed my client that solid wedge is not possible & we can provide flexible wedge only as most of our valve manufacturers produces flexible wedge only. My client has replied that since NACE compliance is...
Gate Valve - Valve engineering | Eng-Tips
2020年1月8日 · For gate valve NPS 2 and above, the most common selection is: Wedge material: A216 WCB + 13Cr Seat material: A105 + Stellite 6 Of course, you can specify the wedge material to be solid A217 CA15 (casting material equivalent to 13Cr), then again the price is …
20 inche gate valve with SOLID WEDGE - Eng-Tips
2013年11月21日 · If you were to have a solid wedge, and an angular misalignment of 1 degree, for a 20" valve, this is a significant reduction in seating contact, which could potentially result in leakage. For smaller valves, it is easier to achieve the seat to disc alignment, thus a …
Gate Valve Stem Axial Load - Valve engineering | Eng-Tips
2018年8月10日 · The force on a gate valve stem is not easy to determine with any accuracy without testing. It also varies considerably depending on where it is in the operation. More than 50% open the forces are essentially weight plus stem upwards force as a result of pressure (pressure x stem area).
Split wedge for gate valve - Valve engineering | Eng-Tips
2011年6月9日 · Are you by any chance referring e.g. to formerly common "double-disc(k)" gate valves, where the discs are spread apart against trimmed body seats (e.g. iron body brass mounted) by wedges actuated by the valve stem, as opposed to resilient or compression resilient seat gate valves that e.g. at least in common water …
Gate Valve with solid wedge complying to NACE MR-01-75
2013年2月21日 · RE: Gate Valve with solid wedge complying to NACE MR-01-75 gerhardl (Mechanical) 21 Feb 13 08:34 You will have to aquire the latest valid issue of the complete NACE MR 01-75 to answer this.