Industries We Serve: Vacuum Pump Repair by Industry

Precise Mechanical repairs, rebuilds, exchanges and replaces liquid ring vacuum pumps and compressors for the industries that run them hardest: paper mills, refineries and petrochemical plants, chemical processors, power generation, food and sugar, and mining. The pumps are the same Nash, Somarakis, SIHI, Siemens, Graham, Travaini and Vooner frames in every plant; what changes is the service they see, and that is what decides how we rebuild them. Everything is done in our Houston machine shop and shipped nationwide.

Paper mills

Paper machine vacuum is where most of our work comes from. Forming, press and felt-conditioning vacuum runs on Nash CL, 904, SC and AT series pumps, often for decades, with white water as the seal liquid and a shutdown schedule that leaves no room for a pump that is not ready. We rebuild all of them, stock exchange units for the common frames, and manufacture drop-in replacements when a rebuild no longer makes sense. Read the full page: paper mill vacuum pump repair and rebuild.

Refineries and petrochemical

Liquid ring compressors and vacuum pumps handle flare gas recovery, vacuum distillation, vapor recovery and wet gas duty, where the process gas is corrosive and sour and the pump is expected to run between turnarounds without complaint. We repair Nash and Somarakis compressors in these services, rebuild in stainless and clad materials where the original cast iron has lost the fight, and build PM 5986 replacements for Somarakis SV and HV frames. Turnaround work is scheduled around your outage, with exchange units available when the dates move.

Chemical processing

Chemical plants use liquid ring pumps for evaporation, drying, crystallization, filtration and reactor vacuum, with seal liquids and process vapors that attack standard materials. Material selection is the whole job here: we rebuild in 304L and 316L, clad cones and heads, and specify seal, bearing and coating options for the chemistry involved. Our seven-step rebuild process starts with a teardown report so you see what the service has done to the pump before you approve the scope.

Power generation

Condenser exhausters and hogging ejector backup pumps are two-stage liquid ring units, usually Nash 904 series or equivalent, that must hold condenser vacuum through a run and pull it down fast at startup. We rebuild 904 series pumps to OEM tolerances, including rotor and cone work on the big lathe and boring mill, and keep exchange units on the shelf for plants that cannot wait for a rebuild.

Food, beverage and sugar

Sugar mill evaporators and vacuum pans, dairy and beverage deaeration, and food packaging vacuum all run liquid ring pumps in wet, warm, continuous service. We rebuild these pumps with materials suited to the seal water, balance the rotors and return them ready for the campaign. Positive displacement blowers used for pneumatic conveying and aeration in the same plants are rebuilt in the same shop.

Mining, aggregate and filtration

Vacuum filters and dewatering systems in mining, lime, cement and aggregate plants put abrasive slurry carryover through the pump. Erosion on cones, rotors and heads is the usual failure; we repair or remanufacture those parts, clad wear surfaces, and recommend the materials and seal-water arrangement that will slow the next round of wear.

Any industry, any size of pump

If your plant is not listed, the answer is still yes. The process does not change with the industry: send the nameplate model and serial, a description of the service and the failure, and photos, and we return a scope. For a down pump, call the emergency line at 713-201-1589 or see emergency vacuum pump repair. For everything else, contact Precise Mechanical or call 281-319-5595.