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Ball Valves for Cement & Mining

Cement plants run some of the harshest valve service conditions — abrasive raw meal slurries, coal dust fuel lines, kiln exhaust gases, and clinker transport systems — demanding full-bore ball valves with hard-faced seats and body materials that resist erosion and high temperatures.

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Key Applications — Ball Valves in Cement & Mining

Raw Meal & Slurry Isolation

Full-bore ball valves isolate raw limestone-clay slurry lines feeding pre-homogenisation silos — hard-faced seats (WC/Stellite) prevent erosive wear in CaCO3 slurry at 5–20% solids.

API 6D, DN50–DN300, WCB/CF8M body, WC hard-faced seats, PTFE packing, flanged RF ASME B16.5

Coal Dust Fuel Line Isolation

Powdered coal (PF) fuel lines feeding cement kilns require ATEX-rated, fire-safe ball valves with anti-static stems to prevent ignition in explosive coal dust atmosphere — API 607 fire-safe, ATEX Zone 21.

API 6D + API 607 fire-safe, ATEX Zone 21, DN100–DN250, CS WCB, graphite seats, anti-static device, SS stem

Kiln Bypass & Tertiary Air Duct

Tertiary air duct (TAD) and bypass duct valves on the rotary kiln handle clinker combustion gases at 700–1,000°C — high-temperature alloy trim and refractory-lined bodies required.

API 6D, Class 300–600, A217 WC9 body, Stellite-6 seats, extended bonnet, temp 700°C, flanged BW

Compressed Air & Pneumatic Conveying

Fluidised air slide, pneumatic conveying pipelines for cement powder and fly ash use high-cycle ball valves rated for abrasive dry powder — full-bore for minimal pressure drop.

API 6D, DN50–DN200, carbon steel, PTFE seats for dry powder service, 10,000+ cycle rated, flanged or threaded

Cooling Water & Utility Lines

Equipment cooling circuits, seal water, and process water in cement plants use standard ball valves and butterfly valves — corrosion-resistant internals for scale-prone hard water.

ASME B16.34, DN25–DN300, WCB or CI body, stainless trim, PTFE/RPTFE seats, flanged ASME B16.5

Required Certifications

API 6D — pipeline and process ball valves for cement plant serviceAPI 607 — fire-safe testing for coal dust fuel linesASME B16.34 — pressure-temperature ratings for process ball valvesASME B16.5 — flange dimensions and ratingsATEX Directive 2014/34/EU — explosion protection for coal dust atmospheres (Zone 21)ISO 9001:2015 — quality management system

Recommended Materials

ASTM A216 WCB (carbon steel body) — standard utility and fuel gas service
ASTM A351 CF8M (SS 316 cast) — cooling water and corrosive utility service
Stellite 6 hard-faced seats — kiln bypass and high-temperature abrasive service
Tungsten carbide (WC) seats — raw meal slurry and abrasive powder service
Graphite packing — kiln duty and high-temperature service
ASTM A217 WC9 alloy steel — kiln bypass and tertiary air duct high-temperature bodies

Selection Factors

Full-bore design is mandatory for abrasive raw meal and clinker slurry lines to prevent buildup at the bore step
Hard-faced seats (WC/Stellite) are essential for any service with abrasive solids — standard PTFE seats erode rapidly in raw meal slurry
ATEX Zone 21 certification and anti-static stems are required for coal dust PF fuel line ball valves to prevent electrostatic ignition
Fire-safe API 607 mandatory for all coal and fuel gas service
High-temperature bodies (A217 WC9) and graphite packing required for kiln bypass above 400°C
High cycle rating (≥10,000 open/close) for pneumatic conveying isolation valves that cycle frequently

Technical FAQs

What type of ball valve is best for cement raw meal slurry?
Full-bore ball valves with tungsten carbide (WC) hard-faced seats and ball surface coating are preferred for raw meal slurry. The full-bore design avoids buildup, and WC seats resist the abrasive CaCO3 particles. Carbon steel WCB bodies with stainless trim are standard.
Do coal dust fuel lines in cement kilns need fire-safe valves?
Yes — coal dust pneumatic fuel lines operate in ATEX Zone 21 (combustible dust atmosphere) and require both fire-safe (API 607) ball valves and ATEX-certified actuators. Anti-static stems are mandatory to prevent sparking.
What temperature rating is needed for kiln bypass valves?
Kiln bypass and tertiary air duct valves must withstand 700–1,000°C combustion gas temperatures. ASTM A217 WC9 or WC6 alloy steel bodies with Stellite 6 seats and graphite packing are standard for this duty.

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Ball Valves for Cement & Mining

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