Product
Filter Bags / PTFE Membrane
Filter Bags
Polyester, PP, acrylic, PPS, aramid, P84, PTFE, fiberglass, antistatic, and ePTFE membrane filter bag options.
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Flaps
Damper solutions for shutting off, regulating and directing material or gas flow in silos, hoppers, conveyors and process lines.
PRODUCT GROUP
Flaps
Damper solutions for shutting off, regulating, and directing material or gas flow in silos, hoppers, conveyors, and process lines. Hantech Filter evaluates material properties, target capacity, line geometry, actuation, wear, sealing, and maintenance access together within the same transport system.
Manual, pneumatic, or motorized slide gates
Single/dual-direction routing and diverter solutions
Maintenance isolation at hopper and silo outlets
Wear, jamming, sealing, and actuator torque checks
Selection based on flange, cross-section, material temperature, and automation signal
Global technical approach
Flap valve selection is made according to the flow-cutoff, dosing, diverting, or sealing function required
Material dampers under silos and hoppers may share the same name as air/process gas dampers, but they serve different functions. The product type isn't fixed until cross-section, fluid, pressure, temperature, wear, and actuator requirements have been clarified.
Flap valve decision criteria
Product selection is made by evaluating site data, process risk, maintenance access, and operating cost together.
Information to be clarified before quotation
- Type and temperature of the conveyed material or gas
- Flange/cross-section size and connection orientation
- Full shut-off, throttling, dosing, or diverting function
- Manual, pneumatic, or motorized operation requirement
- Pressure differential, cycle frequency, wear, and automation signal
Flow task
The need for full shut-off, throttling, dosing, or diverting determines the damper geometry.
Activation
Manual lever, pneumatic cylinder, or motorized actuator; selected based on cycle count and automation signal.
Tightness
Blade, bearing, and seal details are checked for dust leakage, gas bypass, and material jamming.
Weathering
For cement, clinker, and mineral lines, housing/blade material and replaceable wear parts are evaluated.
Product / application comparison
| Type / solution | App | Advantage | Caution point |
|---|---|---|---|
| Slide damper | Silo, hopper, and conveyor inlet/outlet | Simple, reliable full open-close operation | Material column load and blade jamming are checked |
| Pneumatic slide gate valve | Frequent cycling and automated discharge | Fast remote control | Cylinder torque, limit switch, and air quality are required |
| Diverter valve / diverter | Distributing material to two or more lines | Controlled route selection from a single feed | Wear, intermediate position, and cross-leakage are checked |
| Butterfly / gas damper valve | Air and process gas flow adjustment | Compact flow control | Pressure, temperature, and shutoff sealing are selected according to duty |
Product images
Correctly classified site and equipment images for flap valves
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Technical selection
What we evaluate together during the quotation process
Material name and bulk density, ton/hour capacity, particle size, moisture, temperature, line length, incline/elevation difference, operating duration, and connected equipment are all evaluated together.
Capacity and operating regime
Nominal/peak tons per hour, daily operating time, and feed continuity are calculated together.
Material and line geometry
Bulk density, particle size, moisture, abrasiveness, line length, and elevation difference determine the equipment type.
Drive, safety, and maintenance
Motor-gearbox, sensors, guards, service covers, and planned maintenance access are defined from the outset.
Product groups
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ExploreGet a technical quote for flap valves.
Share your material type, target capacity, line length, elevation difference, and operating regime; we'll clarify the conveying equipment and connected line scope.