I have various equipment on-site in terms of pumps and blowers that are fitted with DGS technology. Is it acceptable to perfrom a "bump" test on my motor with the machine coupled up if my equipment is fitted with dry gas seals? I have the ability to feed pressure to the seal assemblies during...
We have a pipeline application that is utilizing a primary wetted seal design (hydropadded) with a dry-running spiral grooved secondary (non-contacting design). What is a typical set pressure for the Plan 72 N2 source? I would think I have to have a minimum of 5-10 psig above normal flare...
I am using conventional tandem seals on a hig pressure ethane pipeline application. The pump is a multistage between bearing and the only flush take-off I have available is off the discharge end. I have about 800 psig and I am not wanting to take full pressure drop across a single orifice.
I am...
I was hoping one of the seal experts could advise how they typically approach changing the face profile of the primary ring when trying to increase/decrease the balance ratio for various reasons.
Is the adjustment typically made with the primary ring OD or the primary ring ID? I would think in...
I know there is a common problem with nitrogen accumulation, particularly in vertical stand-by pumps with gas seals using nitrogen as the barrier gas. Over time the nitrogen accumulation can lead to liquid displacement from the eye of the impeller and a rough start-up that often requires...
Trying to get a feel as to how often you guys utilize an in-line flow meter on the cooling water supply upstream of the heat exchanger on a plan 21/23? I know the seal vendors typically require a certain cooling water flow to achieve "X" amount of temperature cooling and none of our exchangers...
My seal vendor has provided me a copy of a proposed control panel in support of a dry-running secondary seal to use nitrogen as the "buffer" gas.
I noticed on the drawing that the order of instrumentation on the supply leg is as follows:
Filter - Pressure Regulator - Pressure Gauge - Flow...
We have metal bellows installed on plant-wide flashinig hydrocarbon problems and are having issues with our plan 52 pots pressuring up during operation. I've been told "spring loaded" pusher seals are a better choice for flashing hydrocarbon services. Can someone please summarize the overall...
Can anyone please summarize the difference between a Union Unichem/Unilign/VCM pump models? Are they one in the same or are there differences? I believe all are ANSI styled pumps.
I've been told that the Isomag Magnum-S is suitable for completely flooded bearing housings, while the Magnum-C is not a good choice for this environment. Is this due to the "S" model actually being hydraulically loaded from the OD?
I've never seen an answer to the question regarding why one face must rotate and why the other is stationary. I've always believed the best explaination as to why one face rotates is to generate a hydrodynamic seal by both viscous shearing and heat generation to "flash" off visible leakage...
I'm looking for the correct procedure to size orifice plates on both lines of an API Plan 14. My plant has a significant amount of vertical in-line pumps that are currently fitted with single seals using plan 13 flushes. We've calculated seal chamber pressures to be barely above suction pressure...
What is the ideal procedure to add barrier fluid to a plan 53A seal reservoir? If the system is pressurized under a nitrogen blanket, how do you go about adding barrier fluid if the leak is at an extremely low rate and you need to add makeup fluid?
I've heard about re-fill carts, but are they...
