1. Three product families: each requires distinct technology
The most common error in pump specification for the cosmetics and soap industry is treating all products as if they were "liquids". The reality is that the final products of this sector cover a huge rheological spectrum: from a liquid detergent that behaves almost like water (3 to 10 cP), to a body cream with viscosity of 20,000 cP and emulsion structure that breaks under intense shear.
A pump that serves the first case can destroy the second. The first question of any new project is therefore: what is the product viscosity at normal operating conditions, and what is its sensitivity to shear.
| Family | Examples | Viscosity | FB series |
|---|---|---|---|
| Low-viscosity liquids | Detergent, alcohol gel, perfume, tonic | 1-100 cP | Sanitary 316L FBCN |
| Medium-viscosity liquids | Shampoo, liquid conditioner, liquid soap | 100-3,000 cP | 316L FBCN with reduced rotation |
| Viscous and sensitive emulsions | Cream, lotion, toothpaste, hair gel | 3,000-50,000 cP | FBE or FBEI positive displacement |
2. Shampoo and conditioner: the sector's workhorse
Shampoo is the highest-volume manufactured product in the Brazilian cosmetics sector — per capita consumption is one of the highest in the world, driven by cultural frequent hair hygiene habit. The typical formulation combines water (70-85%), surfactants (sodium lauryl sulfate or milder derivatives, 10-20%), co-surfactants (cocamidopropyl betaine, 2-5%), conditioning agents (cations, silicones), preservatives, fragrance and colorants.
Final viscosity is between 800 and 3,000 cP depending on formulation, and the structure is a colloidal solution or dispersion, not a true emulsion — so shampoo tolerates the shear of a standard centrifugal pump well.
For shampoo, the standard recommendation is 316L FBCN at 1,450 rpm rotation (slightly reduced from the standard 1,750 rpm to minimize shear), closed impeller, cartridge mechanical seal with silicon carbide against carbon faces, EPDM or FKM elastomer (compatibility with surfactants and fragrance), sanitary tri-clamp connections for automated CIP. Liquid conditioner follows practically the same recommendation, with difference in elastomer (EPDM may be attacked by some conditioning quaternary cations — in these cases migrate to FKM or FFKM).
Both products are manufactured with FBCN pumps in most Brazilian sector installations.
3. Creams and lotions: gear pumps and controlled shear
Body creams and lotions, facial moisturizers, cleansing milks and similar products are complex emulsions — oil-in-water (O/W) or water-in-oil (W/O) — stabilized by non-ionic surfactants. The structure is weakened by three factors: excessive shear (which destabilizes droplets), high temperature (which affects apparent viscosity of emulsifiers) and air contamination (which oxidizes oil phases).
A centrifugal pump operating at high rotation is the natural enemy of these emulsions: impeller peripheral velocity generates shear gradients that break dispersed droplets and separate phases, ruining the product. The solution is positive displacement — technically, gear, lobe or screw, depending on viscosity and geometry.
The FB Bombas FBE (external gear) and FBEI (internal gear) lines serve the 500 to 50,000 cP range in creams and lotions, with reduced rotation (600 to 1,200 rpm) to minimize localized shear, gear clearances adjusted for compatibility with the specific product viscosity, and electropolished 316L casing for sanitary compliance. The choice between FBE and FBEI depends on viscosity: external FBE serves well up to about 10,000 cP; above this, internal FBEI offers better volumetric efficiency and lower pulsation.
4. Powder soap and detergent: industrial scale and variable chemistry
Brazilian soap manufacturing — Ypê, Bombril, Unilever (Omo, Brilhante), Procter & Gamble (Ace), Assolan — produces impressive industrial volumes of powder soap, bar soap, liquid detergent and softener.
The manufacturing process varies by final product: powder soap is produced by spray drying of an alkaline slurry followed by mixing with dry ingredients; bar soap is produced by direct saponification of vegetable oils with caustic soda (classic process) followed by molding; liquid detergent is a cold mix of surfactants diluted in water with pH adjustment, colorants and fragrance. Each stage has its own pumping points with distinct requirements.
For bar soap saponification, critical points are reactor feed with vegetable oils (316L FBCN), concentrated NaOH lye transfer (FBCN in 316L, pH 14 resistance), saponified soap mass circulation (high viscosity, FBE or FBEI in carbon steel — alkaline soap is not corrosive to carbon) and final transfer to cutting and molding machines. For liquid detergent, it is 316L FBCN throughout the chain due to surfactant sensitivity to metal contamination.
For powder soap, pumps mainly serve the slurry preparation phase before the spray dryer, with 316L FBCN or, for very concentrated slurries, gear pumps.
5. Surfactants and intermediates: aggressive upstream chemistry
The cosmetics and soap sector depends on an upstream chain of surfactant manufacturing — LAS (linear alkylbenzene sulfonate), lauryl sulfate, lauryl ether sulfate, betaines, cocamidopropyl, isethionates — which are pure, concentrated and often aggressive chemicals. This manufacturing is done by specialized chemical companies (Oxiteno, Petrom, Clariant, BASF Brasil) and products are sold to the cosmetic sector at 70-90% concentrations for subsequent dilution in the final formulation.
The pumps of the concentrated surfactant chain operate in a severe chemical environment: extreme pH (2 to 13), moderate to high temperatures (60 to 95 °C), presence of sulfonic acids or caustics, and occasional presence of catalyst residues.
The recommendation for this upstream chain is FBCN in 316L or duplex 2205, with pressurized double sealing and continuous temperature and pressure monitoring. For concentrated LAS (pure sulfonic acid, pH 1-2), the recommendation may migrate to depending on operating temperature. The Brazilian surfactant market is dominated by Oxiteno (Ultrapar), with plants in Mauá-SP, Camaçari-BA and others, and FB Bombas supplies both the point of manufacturing these intermediates and the final consumption point at cosmetic customers.
6. ANVISA RDC 752/2022: good practices for cosmetics
The regulatory health regulation of the Brazilian cosmetic industry was updated by ANVISA Resolution RDC 752/2022, which establishes Good Manufacturing and Control Practices (BPFC) for personal hygiene products, cosmetics and perfumes.
Requirements are less strict than those of the pharmaceutical industry but still include: (1) segregation of manufacturing areas by risk category; (2) qualification of equipment in direct contact with product; (3) cleaning validation between batches to prevent cross-contamination; (4) traceable documentation by serial number of each installed pump; and (5) quality control of process water used in the formulation (NBR 15783 standard or equivalent).
FB Bombas meets these requirements with the sanitary FBCN line in electropolished 316L, complete traceability documentation (MTR material certificates, roughness reports, conformance sheets), and sanitary connections compatible with the sector's standard CIP systems. For the liquid phase of the final product, the standard configuration includes sanitary seal, Ra <0.8 μm finish, complete gravity drainage and absence of dead legs.
For intermediate or auxiliary phases (premix preparation, process water, cleaning), the configuration can be relaxed to reduce cost without compromising final compliance.
