Liquid Process Systems, Inc.

Though it is a good “problem” to have, our continuing backlog of orders for hot oil filtration systems has made it challenging to post to social media on a regular basis. Following the August 2018 post with all the separate components, here is a photo of that completed custom duplex thermal fluid filtration system, assembled and painted. This unit required weld neck fl**ges with forged carbon steel weldolets on all openings. There are multiple connections available for instrumentation ports and purge options. It is now in service in the Midwest at a high profile and well known specialty chemical processing facility.

Here is a photo of another custom designed simplex hot oil filter housing completed late last year that is now in use at another specialty chemical facility in the southeastern USA.In addition to the special sockolet nozzles our customer required, we modified our standard design by putting the vent on the side of the housing instead of at the top and extended piping to allow for 3” thick insulation per our customer’s specifications. The design is extremely robust and rated for 300 psig at 750F. It features top of the line Velan forged carbon steel valves socket welded into place at all openings and Sch 160 siphon tubes with high temperature pressure gauges and diaphragm seals isolated from the process by globe valves, again as the customer specified
Zooming in on the welds in these photos, you can easily see the high quality work and attention to detail that is standard practice at our welding and fabrication shop. Our hot oil filtration equipment and replacement filter elements are Made in USA by people who take exceptional pride in their work.

Many of our high temperature hot oil filter housings feature custom options for end users who specify their preferred process connections of either fl**ged, socket welded or threaded types. Nozzles and fittings are attached to shells with our standard high quality groove or fillet welds.
Pictured here are nozzle component parts to one of the most unique side stream filtration systems that we have worked on to date. Our client has strict hot oil piping specifications that we must incorporate into our filtration equipment that will become part of their thermal fluid heating process loop.
Our highly skilled AWS Certified lead welder made these weldments.
Note the full pe*******on root on the inside of the piping components that attach piping and weldolets to the weld neck fl**ges. Also note the multiple cap passes on the outside that are required to fill up the bevel grooves to make the most sturdy and robust piping that will pass NDT hydrostatic testing at pressures above design specifications. More postings to come as we continue to manufacture the filter housings for this special client.

The attached photo illustrates another example of how we customize to meet each end-user’s specifications. This client specified a high quality and popular name brand hot oil pump and we complied with their requirements. As shown on the attached photo of the stand-alone thermal fluid filtration system, the Dean pump required piping changes that modified our standard skid package. This client also needed a separate Nema 4X NFD dedicated to the pump motor and mounted separately from the main thermal fluid filtration control panel box. It is one more example of how our skid mounted heat transfer fluid filtration systems are modified to be suitable for service in many process heating industries including manufactured wood, asphalt and aggregates, pharmaceutical, oil, gas and petrochemical, food processing, plastics and die casting. Our welders, fabricators and CAD operators welcome these unique equipment customizing challenges because it gives them opportunities to hone problem solving skills and always learn something new. Made with pride in USA!

The “custom” thermal fluid filtration equipment trend continues into 2018. Just a few weeks ago, we shipped two 5-gpm filtration systems with 2” bypass piping to a chemical manufacturer. Users of hot oil systems require filter vessel design in accordance with ASME Section VIII, Division 1 for highest quality welds and specific materials of construction. The bypass line is needed when side stream filtration is installed in “series” on the same pressure line.

With this piping configuration, the bypass line can accommodate the full flow of the main line when the filter element is clogged so that the hot oil heater does not need to be shut down. A small percentage of the flow from the main will be continually filtered by throttling back on the bypass valve and forcing some of the flow from the main line across the filter housing. When the filter element is clogged, the filter housing can be isolated from the process while the main flow continues through the bypass line where full flow can be manually controlled with the throttle valve that is a permanent part of the bypass line. The hot oil heating system can operate continually whether the filter element is clean or clogged or being changed.

Photo shows the low flow filter housing with higher flow bypass line. We call this our Vector with Bypass Series. It ships complete with isolation valves, throttle valve, drain and vent valves as well as pressure gauges to monitor differential pressure to indicate when filter element is clogged and needs to be replaced. Process connections are built to suit end user’s preference of either NPT, Socket Weld or Flanged.