Dropout Box versus Blowing Seal

A Common Conveying Dilemma - Minimising Plant Downtime

Industry: Petrochemical

The problem:

  • Our customer was conveying PVC powder using a standard rotary valve with dropout box configuration.
  • The product is abrasive and dropout boxes were constantly being worn. Plant downtime was significant due to frequent maintenance inspections and work.

The requirement:

  • To find a solution which would be more resistant to abrasion and still effectively introduce the product into their conveying line.

The solution:

  • Our Blowing Seals are perfect for or this kind of application, being fully cast iron with an integral conveying trough in the Body casting and blow port connections on each end cover. To add another layer of abrasion resistance, we Hard Chrome coated the valves internals and included a stainless-steel rotor with replaceable steel tips.

The result:

  • This solution not only resolved the wear issue of conveying line entry but also reduced the amount of valuable site space required to do the job

Working in collaboration, creating tailored solutions, engineering process savings and efficiencies.

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What our customers say

"I wanted to congratulate the entire team at Rotolok on the initial sales consultation, after sales support, technical documentation and most importantly the quality and reliability of your finished product. Notably the two ATEX certified rotary valves we bought from you last year have been faultless!" Rob Rogers, Technical Director, Gough Engineering
"You delivered the first 2 rotary valves in around 3 weeks, which was not only 1 week sooner than you quoted me, but an impressive 17 weeks faster than I was quoted by a competitor of yours!!” Richard Stanton, RAS Extraction Ltd
“I would like to take this opportunity to express my thanks to every staff member at Rotolok for their sincere support throughout. I would definitely recommend Rotolok to be considered on our future projects where advice is sought” Mechanical Engineer, Multi-National Project Management Consultancy
"We have been working with Rotolok for many years, throughout we have been overwhelmed with the product quality and especially the communication." General Manager, Major OEM Supplier, Lithuania
“The RotoFlex Valves arrived today and I could not be happier with them!” James Saker, Maintenance Technician at DDW, The Color House
“You may not know this but I bought twenty 250 drop through seals from Dan McCauley when he first started up in the mid to late 70’s. I think I picked them up from his home near Gatwick- they are still running perfectly!!” Duncan Marston, Former Director at C Marston and Sons (Now known as Heygates, Icklingham)
"Thank you so much for the prompt response and great support as always!” Multinational Consumer Goods Manufacturer
"I was really happy about the service and the fast responses I received.” Mischa Ruf, Process Engineer, Ingelia
"The specification was exactly as ordered and the Rotolok valve worked very well in every moment of production. We appreciate the interest to deliver the perfect product for our application." Alessandro Gonzalez, Mechanical Designer, IRIS S.R.L, Italy