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⚓ 1. VALVES IN MARINE INDUSTRY

Marine valves are designed for seawater corrosion resistance, high pressure, vibration, and long-duty cycles. They are used in ship engines, ballast systems, fuel lines, cooling systems, and firefighting systems.

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🔷 1. Gate Valve (Marine Grade)

✔ Technical Specification

• Size: DN15 – DN600

• Pressure: PN6 – PN40

• Material: Bronze, Cast Steel, Stainless Steel

• End Connection: Flanged (JIS / DIN / ANSI)

• Temperature: -20°C to 425°C

• Operation: Handwheel / Gear

✔ Features

• Full bore flow (low pressure drop)

• Suitable for isolation only (ON/OFF)

• Not used for throttling

✔ Applications

• Ballast water system

• Seawater cooling

• Bilge lines

💰 Price Range

• ₹3,000 – ₹45,000 (≈ $40 – $540)

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🔷 2. Globe Valve (Flow Control Valve)

✔ Specification

• Size: DN15 – DN300

• Pressure: PN10 – PN40

• Material: Bronze / Cast Steel / Stainless Steel

• Seat: Metal / PTFE

• Type: Straight / Angle / Y-pattern

✔ Features

• Excellent throttling control

• High pressure drop

• Precise flow regulation

✔ Applications

• Fuel oil systems

• Lubrication systems

• Steam pipelines

💰 Price Range

• ₹5,000 – ₹60,000

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🔷 3. Ball Valve (Quick Shutoff Valve)

✔ Specification

• Size: DN15 – DN300

• Pressure: PN16 – PN100

• Material: SS304 / SS316 / Brass / Carbon Steel

• Seal: PTFE / RPTFE

• Operation: Lever / Pneumatic actuator

✔ Features

• Quarter-turn operation

• Tight sealing

• Low maintenance

✔ Applications

• Fuel oil lines

• Hydraulic systems

• Chemical transfer lines

💰 Price Range

• ₹2,500 – ₹55,000

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🔷 4. Butterfly Valve (Large Flow Control)

✔ Specification

• Size: DN40 – DN1200

• Pressure: PN6 – PN16 / Class 150

• Material: CI / DI / Stainless Steel

• Disc: SS / Aluminum Bronze

• Seat: EPDM / NBR

✔ Features

• Lightweight

• Cost-effective

• Good for large pipelines

✔ Applications

• Ballast water

• HVAC systems

• Cooling water lines

💰 Price Range

• ₹4,000 – ₹1,20,000

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🔷 5. Check Valve (Non-Return Valve)

✔ Specification

• Size: DN15 – DN500

• Pressure: PN6 – PN40

• Types: Swing / Lift / Wafer

• Material: Bronze / SS / Cast Steel

✔ Features

• Prevents backflow

• Automatic operation

• Protects pumps

✔ Applications

• Pump discharge lines

• Seawater systems

• Fuel transfer systems

💰 Price Range

• ₹3,500 – ₹65,000

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⛏️ 2. VALVES IN MINING INDUSTRY

Mining valves are designed for abrasive slurry, high solids content, high wear resistance, and heavy-duty operation.

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🔷 1. Slurry Knife Gate Valve

✔ Specification

• Size: DN50 – DN1200

• Pressure: PN6 – PN16

• Material: SS / Cast Iron / Rubber Lined

• Knife: SS316 hardened

✔ Features

• Cuts through slurry

• Zero clogging design

• Bidirectional sealing

✔ Applications

• Tailings disposal

• Ore slurry pipelines

• Mineral processing plants

💰 Price Range

• ₹6,000 – ₹1,50,000

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🔷 2. Pinch Valve (Slurry Control Valve)

✔ Specification

• Size: DN25 – DN600

• Pressure: PN6 – PN25

• Material: Cast Iron body + Rubber sleeve

• Operation: Pneumatic / Manual

✔ Features

• No internal metal contact

• Excellent abrasion resistance

• Self-cleaning

✔ Applications

• Slurry lines

• Cement transport

• Mineral processing

💰 Price Range

• ₹8,000 – ₹2,00,000

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🔷 3. Ball Valve (Mining Heavy Duty)

✔ Specification

• Size: DN25 – DN600

• Pressure: PN16 – PN100

• Material: SS / Alloy Steel

• Type: Floating / Trunnion mounted / V-port

✔ Features

• High pressure handling

• Abrasion resistant seats

• Tight shut-off

✔ Applications

• Slurry shutoff

• Chemical dosing

• High-pressure pipelines

💰 Price Range

• ₹5,000 – ₹2,50,000

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🔷 4. Butterfly Valve (Mining Slurry Type)

✔ Specification

• Size: DN50 – DN1200

• Pressure: PN6 – PN16

• Material: Rubber lined DI / SS

• Disc: Hardened SS / Nickel alloy

✔ Features

• Corrosion & abrasion resistance

• Cost-effective for large pipelines

• Easy automation

✔ Applications

• Tailings pipelines

• Water slurry systems

• Mine drainage

💰 Price Range

• ₹4,500 – ₹1,20,000

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⚙️ SUMMARY COMPARISON

Industry	Main Valve Types	Key Requirement
Marine	Gate, Globe, Ball, Butterfly, Check	Corrosion resistance + seawater durability
Mining	Knife gate, Pinch, Slurry ball, Butterfly	Abrasion resistance + slurry handling

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