LQ-SR
Standard Rotary Airlock Valve
General-purpose airlock for gravity discharge of free-flowing powders and granules.
LQ-HD · Product
Heavy-duty Rotary Valve
Reinforced build with wear protection for abrasive minerals, cement and clinker dust.
Product Overview
Abrasive duty is where light valves fail: the rotor tips wear, clearance opens, leakage rises and the valve starts to jam. The heavy-duty range uses a thicker housing, a larger shaft and bearings, and a choice of replaceable wear protection at the points that actually wear — rotor tips, housing bore and the inlet throat.It is built for cement, clinker, quartz, alumina and mineral concentrate service.
Product Structure
Housing
Thicker section fabricated housing with replaceable bore liner and reinforced flanges.
Rotor
Heavy 8-vane rotor with bolted or welded wear strips; hard-facing and ceramic options.
Shaft & bearings
Oversized shaft with heavy-duty spherical roller bearings in a greased, sealed housing.
Sealing
Multi-ring packing with purge port; mechanical seal option for high dust load.
Drive
Geared motor sized with starting torque margin, chain drive with shear-pin protection.
Typical Specifications
| Valve size | DN200 – DN600 typical; other sizes built to drawing |
|---|---|
| Rotor | 8 vanes, heavy section, wear-protected tips |
| Rotor speed | 10 – 25 rpm typical |
| Drive | Geared motor 1.5 – 7.5 kW, chain or direct |
| Housing material | Carbon steel / wear-lined |
| Rotor material | Carbon steel with hard-facing or ceramic |
| Operating temperature | Up to 300 °C with high-temperature build |
| Connection | Square or round flange, drilled to customer pattern |
Values shown are typical for this product family. Final dimensions, materials and performance are confirmed on the approved drawing before production.
Design Features
- Replaceable wear liner in the housing bore extends service life
- Rotor tips protected by hard-facing, tungsten carbide or ceramic tiles
- Oversized bearings for shock loading and start-up under a full pocket
- Shear-pin or torque limiter to protect the drive against jams
- Rebuild service: worn units can be re-lined and re-clearanced
Material Options
- Hard-faced rotor tips — cement clinker, quartz
- Ceramic tile lining — high-wear mineral concentrate
- Wear plate lined housing — general abrasive duty
- Stainless body with wear protection — corrosive plus abrasive
Customisation
Every valve in this range can be built to your drawing: face-to-face length, flange pattern, rotor profile, material grade and drive arrangement. Send your drawing and we will quote against it.
Frequently Asked Questions
How long will the wear parts last?
Service life depends on the material, the particle shape and the rotor speed. Rather than quote a number, we size the wear protection to your duty and supply the wear parts as separately orderable items so they can be replaced without scrapping the valve.
Can you rebuild our existing heavy-duty valves?
In most cases yes. We need the original drawings or a measured survey of the housing bore, shaft and flange pattern, and we will quote a re-lined rotor and housing with restored clearances.
Is a jam-prone material a problem?
Abrasive material that also packs is the hardest case. We would normally increase pocket volume, reduce rotor speed and fit a torque limiter, and in some cases recommend a different discharge principle altogether — we will say so at enquiry stage.
Looking for a reliable rotary airlock supplier?
Send us your drawings or application requirements. Let us find the right solution for your equipment.