Quomodo Legere Datasheet Miscelacis Lavabuli: Fluxus ad 3 Bar, Pressio Minima, Magnitudo Cartusiae et Connexiones Influentium

Most disputes between a faucet factory and an importer are not about quality. They are about a number that was read one way in the quotation and another way on site. A datasheet is a contract written in millimetres, litres per minute and bar — and like any contract, the meaning sits in the qualifiers, not the headline figures.

Here is how to read a basin mixer datasheet line by line, and what to challenge when a line is missing.

The header block

Before the numbers, four identifiers should be present: model reference, product type (single-lever basin mixer, deck-mounted, one-hole), nominal size, and finish. A serious datasheet also states the body material and, for brass, the grade — CW617N is the common European free-cutting brass, while CW602N is the dezincification-resistant grade used where aggressive water is a risk.

Si la finition est décrite uniquement comme « chrome », demander la norme de revêtement. La norme EN 248 définit les revêtements nickel-chrome électrodéposés pour les robinets sanitaires et le régime d’essais associé. Le terme « chrome » seul ne fournit aucune information utile au prescripteur.

Ligne 1 : Débit à 3 bar

Il s’agit du chiffre le plus cité et le moins bien compris. Trois précisions sont essentielles.

**3 bar est une pression de référence, non une pression sur site.** Le débit à travers un robinet augmente selon la racine carrée de la pression dynamique. Un mitigeur classé à 12 l/min à 3 bar débite environ 8,5 l/min à 1,5 bar et 7 l/min à 1 bar. Pour estimer le débit à une autre pression : Q₂ = Q₁ × √(P₂ ÷ P₁). Si une fiche technique indique un débit sans préciser la pression de référence, ce chiffre est inutilisable.

**Il doit s’agir d’une mesure dynamique.** La pression statique mesurée à robinet fermé ne tient compte d’aucune perte ; la valeur de débit doit provenir d’un essai réalisé avec l’eau en circulation et l’embout installé tel que fourni — y compris le diffuseur ou le limiteur de débit. C’est sur cette base que sont évaluées les exigences des normes EN 817 et EN 246.

**Hoc non est maximum.** Mixer lavabuli notatus 5.5 l/min ad 3 bar cum restrictore aptato perhibere potest 14 l/min, si insertum removetur. Utraque figura vera est; sed una tantum in specificatio ponenda est.

Linea 2: Pressio minima — linea quae deorsum tendit proicitur

Mixer lavabuli mono typice ambitum operativum habet ut 0.5–5 bar, interdum 1.0–5 bar, cum corpore PN 10 iuxta EN 817. Sub minimo, symptoma non est fuga sed querela: levigatio vaga sentitur, temperaturae regula imprecisa fit, et fluxus ad spout ad guttam redigit.

Minimam ad systema apta, non ad brochuram:

• **Systemata gravitatis cisternae** in aedificiis vetustioribus saepe 0.2–0.4 bar ad lavabulum superioris soli praebent. Mixer cum minimo 0.5 bar est productum inadmissibile, quamvis aspectus eius placere possit.
• **Systemata pressionis principalis et caldariarum combinationis** normaliter 1.5–3 bar agunt et omni mixer standardi conveniunt.
• **High-rise or boosted systems** can exceed 5 bar at lower floors. Above the rated maximum, fit a pressure-reducing valve; a cartridge is not a regulator.

Ask for both figures in writing: minimum *and* maximum working pressure.

Line 3: Cartridge size and type

"35 mm ceramic cartridge" is the standard entry for a basin mono; 40 mm appears on larger bodies and some kitchen mixers. The diameter determines body size and whether a replacement exists in five years.

A complete line reads something like: *35 mm ceramic disc cartridge, flat base, 90° rotation, with non-return valves.* Each element is a purchasing decision:

• **Base profile** — flat, stepped or lugged; a flat-base cartridge will not seal in a stepped seat.
• **Rotation angle** — 90° is common on basin mixers; 45° quarter-turn suits accessible and care environments.
• **Non-return valves** — relevant to EN 1717 backflow protection where the supply arrangement requires it.
• **Referentia partium reservatarum** — campum utilem maximum pro aequipe manutentionis. Cartusia sine numero partis est mixtor cum vita servitii unius cartusiae.

Linea 4: Connexiones introductoriae

Codices connexorum sunt loca ubi errores ordinandi oriuntur. Configurationes communes:

• **G 1/2" BSP masculinus** in caudis flexibilibus — norma in Regno Unitum, Medio Oriente et magna parte Asiae.
• **G 3/8"** — communis in installationibus Europae continentalis; cauda 1/2" non convenit isolatori 3/8" sine adaptatore, et adaptator addit altitudinem stratae 15 mm.
• **M10 × 1** — filum subtile in summo huiusmodi huius flexibilis ubi ad corpus mixtoris iungitur, saepe coniunctum cum nuce G 1/2" in extremo parietis.

Etiam inspice diametrum internam et longitudinem huiusmodi huius. Cauda 8 mm melius fluit quam 6 mm in systemate pressionis infimae, et cauda 350 mm non attinget isolatores in infimo parte vanitatis montatos. Declara longitudinem requiritam; non supponas.

Linea 5: Dimensiones quae idoneitatem decernunt

Spout reach, spout height, body diameter, tap hole diameter (usually 35 mm), deck thickness range, and overall height beneath the deck. A datasheet without a dimensioned drawing is a picture, not a specification. Confirm deck thickness against the worktop — a 40 mm solid-surface upstand often exceeds a 30 mm-rated mixer.

Line 6: Compliance claims

Standards should be named with scope. EN 817 covers mechanical mixers rated PN 10; EN 248 covers the coating; EN 246 covers flow regulators. WRAS indicates UK approval for water fittings; NSF/ANSI 61 covers drinking-water system components and NSF/ANSI 372 the 0.25% weighted-average lead limit for wetted surfaces. A claim of "NSF approved" without a certificate number and a listing reference is marketing, not compliance.

What each number does — and does not — tell you

Septem quaestiones ad mittendum redire ad suppeditatorem

Ad quam pressionem mensurata est fluxus velocitas, et aerator adpositus erat?

Quae sunt pressiones minima et maxima operativa?

Quod est diametrum cartusae, profili basi et numerus partis reservatae?

Quod est filetum inlet, diameter tubuli flexibilis et longitudo tubuli flexibilis?

Quae est latitudo tabulati, et an descriptio dimensionata praebetur?

Quod est norma et quod est numerus certificati qui affirmationem conformitatis sustentant?

Quod est declaratum gregem sonorum, si projectum est hospitium vel aedificium residens?

Supplicator qui omnes septem in una epistula respondet est supplicator qui servandus est. Cetera est arithmetica.

*Scriptum a turma technica venditionis Zhejiang Xindong Sanitary Ware Co., Ltd., fabricante mixerum lavabuli ex aere et mixerum lavabuli ad murum (T749002, T713002, T8802, T7502, T7102, T730022), quae importatores, distributores et specificatores supplet. Tabulae technicae et schemata dimensionum: www.cn-xindong.com.*