You have just started your new job as senior rotating equipment reliability engineer at a major production facility that involves rotating equipment. You have just joined the morning meeting on your first day and all you hear about is that the TE-101 is up and running, and everyone is hopeful that this time it will [...]
Category Archives: Technical Information
Flanges and Clamps — Should They Leak?
June 30, 2009 – 8:09 PM
Article written by Cliff Knight of KnightHawk Engineering.
You’re offshore on one of the largest rigs in the world. It was put together with all the latest equipment with all the “bells and whistles.” The rig was built, erected and went into production in record time. As with any new unit, it takes a while to [...]
Protecting Progressing Cavity Slurry Pumps
June 29, 2009 – 3:44 PM
Article written by David Gardellin of Onyx Valve Co
A progressing cavity pump consists of a single helix metal rotor that turns inside a double helix rubber stator. This forms a series of pockets that traverse the length of the pump, gently pushing fluid from the suction to the discharge in a smooth, pulseless stream.
Progressing cavity [...]
Mechanical vs. Solid State Pressure Switches
June 25, 2009 – 8:23 PM
Article written by David Gardellin of Onyx Valve Co
Onyx Isolator Rings have traditionally been supplied with mechanical gauges and mechanical switches to monitor process pressure and pump performance. These do a fine job, but many users are changing over to solid state switches. This paper will discuss some of the advantages of each.
Principle of operation:
Mechanical [...]
The Effects of Capillary Tubing on Pressure Measurement
June 24, 2009 – 9:47 PM
Article written by David Gardellin of Onyx Valve Co
Capillary tubing introduces three effects on the performance of pressure-sensing instruments:
1. Temperature effects. Temperature changes cause the liquid inside the capillary tube to expand and contract, changing the volume of the fill fluid. The resulting error is a function of the total volume of the tubing, pressure [...]
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