Technical Glossary — MT Valves & Fittings

A-316: Stainless steel grade with added molybdenum for higher corrosion resistance, especially against chlorides. Standard material for stainless steel ball valve discs و bodies in coastal و chemical applications.
ACS: Attestation de Conformité Sanitaire — French sanitary conformity certification for materials in contact with drinking water. Issued by the French Directorate General for Health.
AENOR: Asociación Española de Normalización — Spanish standardisation body. The AENOR mark certifies compliance with European و Spanish technical standards.

صنبور حديقة: نوع من صنابير الحدائق أو الحنفيات مع موصل خرطوم، عادة بمسنن BSP أو NPT. شائع في الري وتركيبات المياه الخارجيةnstallations.
BIM: Building Information Modelling — a digital representation of physical و functional characteristics of facilities. MT provides BIM-ready Revit files for major references.
BSP: British Standard Pipe — the most common pipe thread standard in Europe و the GCC. Available in two variants: BSPP (parallel) و BSPT (tapered).
نحاس: Copper-zinc alloy used in MTs hydrosanitary valve range. Forged hot-stamped brass under EN 1254-2 standard for corrosion resistance و machinability.
صمام الفراشة: A quarter-turn valve with a circular disc rotating around an axis perpendicular to the flow. Lightweight و economical for diameters from DN50 upwards.

حديد زهر: Iron-carbon alloy used in MTs industrial valve range — particularly for flanged butterfly valves, gate valves و Y-strainers from DN50.
علامة CE: Conformité Européenne — mandatory mark indicating conformity with applicable EU directives. Baseline requirement for any product released in the European market.
صمام عدم رجوع: Also known as non-return valve — allows fluid flow in one direction only, preventing backflow. Available in disc, swing, ball و lift configurations.
CSTB: Centre Scientifique et Technique du Bâtiment — French technical assessment body that issues Avis Technique certifications for construction products.

DIN: Deutsches Institut für Normung — German national standards organisation. Many flange dimensions و pressure ratings follow DIN standards across Europe.
DN: Diamètre Nominal — nominal internal diameter of a pipe or valve in millimetres. DN50 ≈ 2", DN65 ≈ 2½", DN80 ≈ 3", و so on.
DVGW: Deutscher Verein des Gas- und Wasserfaches — German Gas و Water Association. Certifies products for use in German drinking water و gas networks.

EAC: Eurasian Conformity — mandatory certification for products sold in the Eurasian Customs Union (Russia, Belarus, Kazakhstan, Armenia, Kyrgyzstan).
EAN: European Article Number — 13-digit barcode standard used worldwide for product identification. Every MT reference has its own EAN-13 code.
EN 10204 3.1: European standard for material certification. The 3.1 type provides certified test reports signed by the manufacturers authorised inspector.
EPDM: Ethylene Propylene Diene Monomer — a synthetic rubber widely used as seat material in butterfly valves و as flexible body in expansion joints. Excellent water و steam resistance.

مقاوم للحريق: Certification standard (API 607 / ISO 10497) for valves designed to maintain integrity during external fire exposure. Critical for petrochemical و industrial applications.
Flange: A protruding rim with bolt holes used to connect pipes و valves. PN-10 و PN-16 are the most common pressure ratings; ISO و DIN are the most common dimensional standards.
فتحة كاملة: تصميم صمام تتطابق فيه الفتحة الداخلية مع القطر الداخلي الكامل للأنبوب، مما يقلل من تقييد التدفق وانخفاض الضغطوard on MT ball valve premium ranges.

صمام بوابة: A linear-motion valve with a sliding gate that controls flow. Designed for fully open or fully closed service — not flow regulation.

HVAC: Heating, Ventilation و Air Conditioning — major application sector for MT butterfly valves, Y-strainers و expansion joints.

ISO 9001: International quality management standard. MTs production و distribution chain is ISO 9001:2015 certified by TÜV Rheinland.
ISO 14001: International environmental management standard. MTs operations are ISO 14001:2015 certified, demonstrating commitment to sustainability.

Kiwa: Independent Dutch certification body. Issues product certificates for water, gas و construction in the Netherlands و beyond.
KOMO: Dutch certification system administered by Kiwa. Confirms compliance with construction sector standards including UNE-EN 13828 و NKB-13.

PED: Pressure Equipment Directive (2014/68/EU) — European regulation for the design, manufacture و conformity assessment of pressure equipment above 0.5 bar.
PIM: Product Information Manager — MTs centralised database of all product technical و commercial information. Keeps catalogues, datasheets و pricing synchronised.
PN: Pression Nominale — nominal pressure rating in bar at 20°C. PN-10 = 10 bar, PN-16 = 16 bar, PN-25 = 25 bar, PN-30 = 30 bar.
PZH: Państwowy Zakład Higieny — Polish National Institute of Public Health. Issues drinking water material certifications in the Polish market.

Sintef: Norwegian independent research organisation. Issues PS-series product certificates accepted across the Nordic construction industry.

TRN: Tax Registration Number — UAE VAT identifier. Mandatory for businesses with annual turnover above AED 375,000.
TÜV Rheinland: Independent German certification body. Audits و certifies MTs ISO 9001 quality و ISO 14001 environmental management systems.

وفر (Wafer): نوع تركيب صمام يتم فيه إدخال الهيكل بين شفتين بمسامير ربط. قياسي لصمامات الفراشة.
WaterMark: Mandatory Australian certification for plumbing و drainage products in contact with drinking water.
WRAS: Water Regulations Advisory Scheme — UK certification for products suitable for contact with potable water. Required for installations connected to the UK public water network.

مصفاة Y: جهاز ترشيح على شكل Y يزيل الجسيمات الصلبة من السوائل قبل وصولها إلى المضخات والصمامات والمعدات اللاحقةsupplies cast iron strainers with stainless steel sieves.

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