Double Flap Valve | Dust-Free Powder & Cement Discharge
Efficient Airtight Sealing for Smooth Cement & Bulk Powder Flow
Katup Double Flap Andal untuk Aliran Semen & Bubuk Bebas Debu
Overview
The Double Flap Valve is a heavy-duty airlock discharge system designed for continuous, dust-free handling of fine powders and bulk materials, including cement, fly ash, lime powder, alumina, feldspar, and chemical powders. Its dual-chamber structure ensures airtight sealing, prevents dust leakage, and eliminates material backflow, while maintaining stable and high-capacity feeding performance.
LVRUI Double Flap Valves are specifically engineered for cement plants, powder transfer systems, and bulk material handling facilities, providing reliable, high-efficiency, and dust-free operation in pneumatic conveying pipelines, silo unloading systems, and industrial processing lines across Indonesia, Southeast Asia, and global industrial markets.
This valve is widely used in:
✅ Cement plants
✅ Pneumatic conveying systems
✅ Dust collection systems
✅ Silo unloading systems
✅ Chemical and mineral processing industries
Features
✅ Continuous discharge with alternating flap operation
✅ Zero air leakage for stable pneumatic conveying
✅ Dust-free operation improves environmental control
✅ Handles high-temperature, abrasive, and fine materials
✅ Suitable for negative pressure and positive pressure systems
✅ Long service life with durable steel construction
✅ Compatible with existing silo outlets and dust collectors
See our dust collection solutions.
Applications
✅ Silo and hopper discharge
✅ Fly ash, cement, lime powder handling
✅ Dust collector discharge points
✅ Pneumatic conveying lines
✅ High-temperature or abrasive powder applications
✅ Bulk powder processing industries
Advantages
✅ Efficient dust-tight operation
✅ Stable feeding and smooth discharge
✅ Long-lasting heavy-duty construction
✅ Easy maintenance and low operating cost
✅ Suitable for harsh industrial environments
✅ Improved system efficiency in pneumatic conveying
Working Principle
✅ Material enters the upper chamber
✅ Upper flap closes → lower flap opens
✅ Material discharges while maintaining air pressure balance
✅ Dual flaps work alternately to ensure continuous, dust-free feeding
✅ Prevents air escape, dust leakage, and material backflow
This principle enables the double flap valve to operate as an airlock valve, allowing material passage while maintaining system pressure integrity.
Matched with air-slide-conveyor and pneumatic conveying lines
For a general definition of an airlock, please refer to Wikipedia – Airlock.
FAQS About Double Flap Valve
What is a double flap valve used for?
A Double Flap Valve is used for dust-free and airtight discharge of bulk powders and granular materials, including cement, fly ash, lime, and clinker. It is commonly installed under silos, hoppers, dust collectors, and pneumatic conveying systems to prevent air leakage and material backflow, ensuring smooth, continuous, and high-capacity material transfer in cement plants and industrial processing facilities across Indonesia and Southeast Asia.
How does a double flap valve work as an airlock?
The valve operates with two alternating flaps. While one flap opens to discharge material, the other remains closed to maintain air pressure balance. This alternating operation ensures continuous flow, dust-free operation, and airtight sealing, making it ideal for cement, powder, and granular material handling pipelines in industrial bulk material facilities.
What materials can be handled by a double flap valve?
Double Flap Valves handle cement, fly ash, lime powder, clinker, mineral powders, grains, and plastic pellets, including abrasive or high-temperature materials when proper lining is used. They are widely applied in cement plants, powder transfer systems, and bulk material handling operations.
What is the difference between a double flap valve and a rotary valve?
A double flap valve provides dust-free and high-capacity discharge suitable for high-temperature, abrasive, or irregular powders, with minimal maintenance. A rotary valve is designed for metered feeding applications but may experience higher wear under harsh operating conditions. Double flap valves are preferred for cement and bulk material handling in pneumatic and gravity conveying systems.
Can double flap airlock valve be customized for specific applications?
Yes. Double flap airlock valves can be customized in size, housing material, flap sealing design, actuator type, and inlet/outlet connections to match specific silo discharge, dust collection, or pneumatic conveying requirements in cement plants and industrial powder handling facilities.
Need a Reliable Double Flap Valve for Dust-Free Powder Discharge?
Partner with LVRUI for professional bulk material handling solutions and responsive technical support.
✅ Get expert quotation and customized cement & bulk powder handling solution within 12 hours
✅ Factory direct supply for fly ash, clinker, and cement silo loading systems
✅ Professional engineering support for bulk powder handling projects in Southeast Asia and Indonesia
✅ Stable delivery for overseas industrial projects