Case Study — Explosives & Mining
Bulk Emulsion Plant: Field Rebuild Advantage
On-site PA300S rebuilds with factory PK300S kits beat replacement lead time during peak truck-loading season.
Situation
A bulk emulsion manufacturing plant running three PA300S stainless transfer pumps on truck-loading and silo pump-over lines experienced seal and gear wear after two seasons of continuous duty. Peak loading windows left no margin for a 6–8 week replacement pump lead time. Management asked whether on-site rebuilds could restore rated flow without pulling piping or sending hardware off-site.
Approach
Maintenance stocked one PK300S kit per active pump. When flow dropped below 90% of baseline at 100 PSI, the crew scheduled a half-shift rebuild following the 12-step field procedure. Housing and covers stayed in the line; only wear components were replaced. Viton gears were specified because winter matrix temperatures exceeded standard nitrile comfort range.
Results
- Downtime: 4–5 hours per pump vs 6–8 weeks for new unit procurement
- Cost: Kit rebuild estimated 35% of new PA300S capital cost per event
- Flow restored: Post-rebuild performance matched factory curve at 140 GPM @ 100 PSI
- Spares strategy: One kit on shelf per pump eliminated expedite freight on seal failures
Takeaways
For bulk emulsion surface transfer, the pump is rarely the long pole — lead time is. Field-serviceable gear pumps with factory-matched kits let plants stay in production through loading season. Pair rebuild capability with the right material spec (stainless + Viton for cold emulsion) and a written maintenance trigger (flow loss, seal weep, noise). Related reading: field rebuild advantage, truck & MMU pump selection.
Planning rebuilds for your transfer pumps?
Tell us your model, fluid, and duty cycle — we will confirm kit contents and lead time.