OTHERS
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RALVs
RALVs are mechanical devices used to regulate the controlled discharge of bulk solids (like ash or dust) from hoppers, ESPs, or bag filters while maintaining air/gas pressure seal between two process zones.
Key Features:
- Precision-machined rotor for leak-proof operation
- Maintains system pressure while enabling material flow
- Handles abrasive materials like fly ash, coal dust, or biomass fines
- Available in cast iron, MS, or SS construction
EXPANSION BELLOW
Expansion bellows are flexible connectors used to absorb thermal expansion, vibration, and misalignment in ducting and piping systems—especially in high-temperature flue gas paths of boilers.
Key Features:
- Compensates for axial, lateral, and angular movements
- Made from stainless steel or fabric (for gas ducts)
- Reduces mechanical stress on fans, ESPs, and ducting
- Custom-designed for pressure, temperature, and movement ranges
DAMPER
Dampers are flow control devices installed in ducts to regulate or isolate airflow and flue gas in boiler systems. They are critical for combustion control, draft regulation, and system safety.
Key Features:
- Types: Guillotine, Butterfly, Multilouver, and Slide Gate
- Operated manually, pneumatically, or via electric actuators
- Designed for high-temperature and high-dust flue gas service
- Ensures tight sealing with minimal leakage for process control
STEAM COIL AIR PRE-HEATER (SCAPH)
Steam Coil Air Pre-Heaters (SCAPH) are used to preheat combustion air by using low-pressure steam or condensate in cold climates or during boiler start-up, improving boiler efficiency and supporting stable combustion. PP Boilers manufactures SCAPH units that are compact, reliable, and designed for efficient thermal transfer with minimal maintenance.
- Types: Horizontal or circular coil type.
- Material: Carbon steel frame with coils in SA 210, 213 T11 / T22, SS 304/316.
- Design Pressure: Up to 10 kg/cm² (g)
- Temperature Handling: Combustion air preheated up to 80–90°C
Key Features:
• High thermal efficiency with optimized coil geometry for maximum heat transfer.
• Suitable for preheating air in all type boilers.
• No pressure drop design for no impact on fan performance.