LQ-SR
Standard Rotary Airlock Valve
General-purpose airlock for gravity discharge of free-flowing powders and granules.
LQ-SS · Product
Stainless Steel Rotary Valve
304 / 316L construction for corrosive powders, chemicals and washdown areas.
Product Overview
Where carbon steel would corrode or contaminate the product, the valve is built in 304 or 316L stainless steel with machined contact surfaces and a finish suited to the duty. This range is specified for chemical powders, pigments, food-adjacent ingredients and washdown areas, and can be supplied with a quick-release rotor for cleaning access.
Product Structure
Housing
Stainless fabricated or cast housing, pickled and passivated; internal weld seams ground flush on request.
Rotor
Stainless open or closed rotor, machined and polished; quick-withdrawal rotor option for cleaning.
Shaft & bearings
Stainless shaft with outboard stainless or sealed bearing housings.
Sealing
Food-grade packing or mechanical seal; air purge for fine powders.
Drive
Stainless or painted geared motor, washdown-rated on request.
Typical Specifications
| Valve size | DN150 – DN400 typical; other sizes built to drawing |
|---|---|
| Rotor | 8 vanes, open or closed, polished |
| Rotor speed | 15 – 30 rpm typical |
| Drive | Geared motor 0.55 – 2.2 kW |
| Housing material | 304 / 316L stainless steel |
| Rotor material | 304 / 316L stainless steel |
| Surface finish | Pickled and passivated; polished on request |
| 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
- 304 or 316L wetted parts, pickled and passivated
- Internal surfaces ground and polished where product contact requires it
- Quick-release rotor and hinged inspection cover for cleaning access
- No painted surfaces in the product contact zone
- Optional sanitary flange patterns to suit your equipment
Material Options
- 304 stainless steel — general chemical and food-adjacent powders
- 316L stainless steel — chlorides, acids, washdown environments
- Polished contact surfaces — product changeover and cleaning
- Stainless with wear protection — corrosive and abrasive combined
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
Is the valve hygienic-certified?
We build to your dimensional and finish requirements, but we do not claim food or pharmaceutical certification for this range. If your process needs certified sanitary design, tell us the standard you must meet and we will say clearly whether we can meet it.
Can it be cleaned in place?
A quick-release rotor and hinged covers give access for manual cleaning. True CIP design requires specific internal geometry and drainability, which we would review with your process engineer.
Do you supply material certificates?
Yes. Mill certificates for the specified grades can be supplied with the order; state the requirement on your enquiry.
Looking for a reliable rotary airlock supplier?
Send us your drawings or application requirements. Let us find the right solution for your equipment.