What is 'Bubble Tight Shutoff' ? - Valve engineering - Eng-Tips
Feb 20, 2007 · Mechanical. The term "bubble tight seal" is very old. My understanding is that it originated from a test where a valve was installed in an air system with an open end pointing up. Some soap was poured into the open end and air was applied to the other side. The valve passed if no bubbles formed in the soap.
P&ID symbol for VFD (VSD) - Codes and standards general …
Petroleum. Nov 25, 2005. 2,349. CA. My preference is the SIC and SC instrument bubble. I have also seen the positioner symbology used for non pneumatic control, usually on louvers, vents, etc. where it is an elec motor doing the opening/closing. In my experience, the P&ID bubbles/symbology "standard" usually vary by projects/clients. And from ...
air lock in gravity flow pipes 1 - Eng-Tips
Feb 21, 2003 · In other words u liquid > u bubble The bubble rise velocity can be estimated by, u bubble = 0.345*sqrt(g*D) If this expresion is rearranged, we get back the expression for Froude number: (u bubble)/sqrt(g*D) = Fr = 0.345 So, to clear the bubble from the vertical pipe, the Froude number should exceed 0.3. This is similar to the statement made by ...
Adding Reference Balloons manually - NX 11 - Siemens: UG/NX
Jul 10, 2004 · It would be great to be able to place empty balloons on parts and just update the parts list to populate. But I've played around with your suggestion but haven't had any luck.
Nitrogen for Removal of Oxygen from Water 1 - Eng-Tips
Aug 6, 2010 · Please note that the nitrogen sparging is not our primary method of removing oxygen from the water. The problem comes when we need to use makeup water from the tank which is open to atmosphere and contains around 8 ppm oxygen while the water that it mixes with contains less than 10 ppb.
Dimensions appearing neon green instead of black!? - Eng-Tips
May 5, 2011 · When importing dimensions they show up black, but adding them manually to drawings (dimensions, non imported (driven)) they show up as neon green instead of dark grey as specified in the System Options > Colors. Center marks also show up neon green. I had him open an old drawing with correctly colored dimensions, save that as a template, then ...
Solid concrete foundation for fire pumps - Eng-Tips
Jun 23, 2016 · 432. CA. NFPA 20 requires that the fire pump base plate be securely attached to a solid foundation in such a way that pump and driver shaft alignment is ensured. Since most pump room floors slope to a floor drain, a level foundation above the floor is typically the way to accomplish this. NFPA 20-2016 6.4.4 also says 'The foundation shall be ...
worm gear hose clamp pressure limitations. - Eng-Tips
Aug 29, 2003. 14,450. US. Clamps with 'liners' like that to provide a pseudo- continuous inner face are strongly preferred for silicone hose, which is easily cut. Many variations exist. The nut torque is also typically limited to 50 in-lb or less for the typical 1/4-28 t-bolt thread regardless of clamp size because even a lined clamp is capable ...
Dashed/Dotted lines in a drawing - DASSAULT: SOLIDWORKS 3D …
Feb 5, 2010 · Mechanical. May 1, 2001. 6,992. US. Enable your Line Format toolbar and/or check the "For Construction" box after you highlight a sketch segment. "Art without engineering is dreaming; Engineering without art is calculating."
NDE of Section VIII, Div. 1 Vessel - Eng-Tips
Jan 6, 2016. 15. CA. All, We are working on an ASME Section VIII, Div. 1 pressure vessel installed in British Columbia, Canada. The vessel is SA516 (P1) material with a 2.5" wall thickness. The vessel is 200' high and 30' in diameter. The vessel operates at 32-350F and at 150 PSI. We are installing several nozzles into the vessel wall.