DOSERAY

 STORAGE - DOSING - CONVEYING

 

SULTAN MAKİNA LTD.ŞTİ.

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TURKISH ROTARY VALVE turkish

 rotary valve

ROTARY VALVES

T

rotary valve airlock

AIR LOCKs

What is a Rotary Valve?

 
It is a compact mechanical device for continuously discharging bulk powders or granules under  gravity flow. By definition it is the simplest of machines having only one moving part (ignoring the drive); a multi-vane rotor revolving in close contact in the housing and where the housing has an  inlet at the top, and an outlet at the bottom.
Despite its simplicity it offers several functional uses:-
* Control product flow rate to the required rate (fixed or variable)
* Maintain a gas pressure differential between the inlet & outlet (AIRLOCK)
* Act as an explosion barrier
* Act as a Flame Barrier
* Act as a process isolator / barrier
As well as satisfying any one or any combination of these needs, the valve also has to overcome
any adverse characteristics of the product being handled. To complicate matters further product
characteristics can be altered by the duty conditions which are not always stable.
Notwithstanding the above some 60%+ of applications can be readily satisfied from standard
components and, if necessary, the inclusion of common additional features. The remainder tend to
require specialist input in order to ensure satisfactory performance and service life.
In all cases, technically competent suppliers will examine the duty carefully to ensure that the right
unit is offered, and to be sure that any special considerations are identified and provision made.

EXPLANATION OF A ROTARY AIRLOCK VALVE


Rotary AIRLOCKs are referred to by many different  names. Some are appropriate, and some are not. There are three appropriate names which are  universally accepted when referring to this product.
Technically, they all refer to a similar device in terms of design and appearance. These are:
1. Rotary Feeder
2. Rotary Valve
3. Rotary AIRLOCK
Most suppliers and users are familiar with all these  terms. We will focus on the term ‘rotary AIRLOCK’ for  the purpose of this discussion. To further identify the  name ‘rotary AIRLOCK’, we will define the two separate terms.

 
Rotary Valve ,  AIRLOCKS Function
Our Rotary Valves, designed according to a criteria of maximum applicative universality, are suitable for controlled feeding or discharging of products in powder or
granular form, from silos, hoppers, pneumatic conveying systems, bag filters or cyclones.

rotary valve - air lock body

AIRLOCK, ROTARY VALVE - ROTOR TYPES

  • rotary valve rotorairlock body2rotary valve rotor typerotary valve rotor type 6rotary valve rotor type 5rotary valve rotor type 9rotary valve rotor type 2
  • Rotary Valve - Ailocks-Star Feeder internal Rotors have options such as blade, rounded type, adjusted blade type, stripper and polyamide.  
  • • OPEN AND CLOSED END ROTORS
    • RELIEVED ROTOR TIPS
    • REDUCE CAPACITY ROTORS
    • TEFLON COATED AND NICKEL PLATED ROTORS
    • ROUND AND SQUARE FLANGE
    • DIRECT-DRIVE AND CUSTOM DRIVE PACKAGES
    • HIGH TEMPERATURE MODIFICATIONS
    • SPECIAL PAINT
    • FLEX TIPS
    • ABRASION RESISTANT TIPS
    • CHROME PLATED HOUSINGS
    • CAVITY AND SHAFT AIR PURGE
  • Every pneumatic process is unique, so DOSERAY  customizes every solution  to meet your needs.  Pneumatic conveying systems and components are what we know, no
    matter how large or small your line. Tell us what you intend to accomplish  and we’ll make sure the pieces fit.Dependable, versatile systems. Solutions that fit. It’s the foundation of our business.

Rotary Valve PDF brochure rotary valve pdf

Why Choose a DOSERAY Rotary AIRLOCK?

Air Filtration provides a complete line of rotary valve - AIRLOCKs suitable for AIR LOCK applications ranging from gravity discharge of filters, rotary valves, cyclone dust collectors, and rotary valve - AIRLOCK storage devices to precision feeders for dilute phase and continuous dense phase pneumatic conveying systems. Rotary Valve / AIRLOCK Feeders are used in pneumatic conveying systems, dust control equipment, and as volumetric feed-controls to maintain an even flow of material through processing systems. The basic use of the rotary valve, AIRLOCK feeder is as an AIRLOCK transition point, sealing pressurized systems against loss of air or gas while maintaining a flow of material between components with different pressure. Rotary Valve, AIRLOCK Valves are also widely used as volumetric feeders for metering materials at precise flow rates from bins, hoppers, or silos onto conveying or processing systems.

Blow Through Rotary Valves

BLOW-THROUGH ROTARY AIRLOCK VALVE - DOSING OF POWDER FOR FEEDING PNEUMATIC CONVEY SYSTEMS
Cast iron, 304, 316L stainless construction
These rotary AIRLOCK valves are designed for extraction applications under devices (supported or not), gravity flow or feeding in pneumatic conveying (depression or pressure).

The rotary AIRLOCK valves are designed for feeding and controlled discharge of powdered or granular in silos, hoppers, pneumatic conveying systems, bag filters, cyclones in powder handling processes.otary valve is of no use by itself. Rotary valve, AIRLOCKs are useful as one component in a bulk or specialty material handling system. Rotary Valve, AIRLOCK Feeders have wide application in industry wherever dry free-flowing powders, granules, crystals, or pellets are used. Typical materials include: cement, sugar, minerals, grains, plastics, dust, fly ash, flour, gypsum, lime, coffee, cereals, pharmaceuticals, etc...

usage as

Rotary AIRLOCK feeders (rotary valve) / rotary AIRLOCK valves are used in pneumatic conveying systems,dust control equipment, and as volumetric feed-controls.

CAUSES OF WEAR AND ABRASION TO ROTARY AIRLOCK VALVES

rotary valve capacity

airlock body


Among the leading causes of rotary AIRLOCK valve  failures is wear to either rotor, or housing, or both. Wear of these components occurs during use.  Since a rotary AIRLOCK valve is primarily a material  handling device, it is subject to erosion and abrasion created by the material being processed. The proper selection of one rotary AIRLOCK valve for an  application depends, to a large extent, on the nature  and characteristics of the material being processed;  and how the material is being processed.  From an overview, rotary AIRLOCK valves are used in  material processing applications ranging from flour to rocks, plastics to potatoes, dust to detergents, peanut hulls to cotton seed, carrot tops to salt, coal  to rice, wood chips to aluminum shavings, and many, many more materials too numerous to mention.  Some of these materials are abrasive, some are not.  Those that are abrasive are not necessarily equally  abrasive by comparison. There are, of course, other  considerations for each material other than abrasion,  but our focus for this discussion is going to be on  the abrasive characteristics and their effect on the  AIRLOCK components   Wear, due to abrasion, from a material being  processed through a rotary AIRLOCK valve can be  divided into two types:
1. Surface drag abrasion 

2. Pneumatic assisted abrasion

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