Rotary Airlock Valves, Manufacturer, Supplier, India

Electromech Rotary Airlock Valve : Working

The prime function of a rotary airlock valve is to regulate the flow from one chamber to another while maintaining a good airlock condition. Basically the valve is designed with a paddle wheel which is shaft-mounted and driven by a motor. The rotary valve is similar to a revolving door: the paddles or blades create a triangular pocket between blades and the circular housing that it is rotating in and form an airtight seal with the housing; the motor slowly moves the blades to allow the solids to discharge from the hopper. Packing glands of generous proportions seal against air or gas leakage into or out of the feeder. Self lubricating packing designed to sustain operating temperature.

1000 NB Valve

Blow Through Valve

Drop Through Valve

Double Acting Valve

Rotary Airlock Valve

Electromech Rotary airlock valve how is Airlock provided?

Clearances between the rotor and housing are 0.10mm / 0.15mm for the standard valve. Tight clearances allow minimal air escape through the valve. This way product can be transferred between areas of differing pressure or vacuum.

Rotary Airlock Valves Are Available In 4 Basic Types :

Drop Through Type
Side Entry Type
Blow Through Type
Sanitary Type

Electromech Rotary Airlock- Sizes
We have a 35 models for variety of applications :
100 / 150 / 200 / 250 / 300 / 350 / 400 / 450 / 500 / 550 NB
700 / 750 / 1000 / 1250 / 1600 / 2000 NB

Our Resources :

Maintenance Friendly	Easily Assembled And Disassembled : 4 Bolt Flange Mount Bearings Are Removable With Valve In Place, Completely Removable Gland Follower For Access To Shaft Seal Packing
Body & End Covers	Precision Machined Cast Iron, Or Cast Aluminum or Fabricated - MS, Hardox Robust body adequately stiffened to prevent distortion
Options	Body Air Vent And End Seal Air Purging
Flanges	Asa Pattern Round, Square
Rotor	Precision Machined Fabricated Mild Steel Or Stainless Steel, Open End Or Closed End
Options	Fixed Blades, Adjustable Tips
Rotor Tip Options	Mild Steel, Stainless Steel, Abrasion Resistant Steel, Brass, Teflon, felt , Hardox
Shaft Seals	Gland Type With Packing
Bearings	4 Bolt Flange Mount With Grease Purge Fitting, Options - High Temp Solid Lube, Inboard, Sealed For Life Bearings
Gear Reducer	High Efficiency Helical Gear, Double Reduction
Motor	Heavy Flange Mounting, Heavy Duty, Premium Efficient
Drive	ANSI Chain With Sprockets Or Coupled Drive

Options

Quick Release Rotors
Direct Coupled Drives
Air Purge Glands
Body Vents
Speed Switches
Flameproof Motors
Shear Plate Deflectors
Buffing

Outstanding Features of Electromech Heavy Duty Rotary Airlock Valves :

Minimized clearance at rotor tips and sides with body

Robust body adequately stiffened to prevent distortion
Precision machining of the components
Heavy duty body with pocket air vent facility option
End covers with flange type bearings mounted outboardv
Glands stuffing box
Type with purge facility option
Open and closed type fabricated rotor with varied options of tips to suit product need

Rotors are available with open or closed ends.

Calculating Rotary Airlock Valve Sizes

For example, if rotary airlock valve size selected is 150 NB and it rotates at 22 RPM with 100% pocket filling factor,
its volumetric flow rate is 3.6 m³/hr.
Valve throughput per hour (100% pocket filling factor) = Volumetric Flow × Material Bulk Density
= 3.6 × 1000 (bulk density assumed)
= 3600 kg/hr
Valve throughput per hour (70% pocket filling factor) = 3600 × 0.7
= 2520 kg/hr

Material of Construction

As per our higher experience we are deciding the Material of construction Rotary Airlock valve which is suitable as per the various applications.

CAST IRON AS PER IS 210 Grade FG-260
MS FABRICATED AS PER IS 2062
SS-304 / SS-316
SAIL HARD
HARDOX- 500

Electromech Rotary Airlock Valves : Application Areas

Material Conveying systems.
Pneumatic Conveying Systems.
Air Pollution Systems, In the dust filtration field good airlock is essential on cyclone and bag filter
Dust suppression equipment.
Feeding granular or fine material.
Cement and abrasive material manufacturing industries.
Cement, Steel, Food, pharmaciticals, sugar, and fertilizer, Chemical, pulp and papers etc.

Sr. No.	Sizes of Rav (Round/ Square Flanged)	Volumentric Flow Capacity Per Revolution ( Mtr.Cube / Revolution)	Rotor Speed In RPM	Volumentric Flow Capacity Per Hour At 100% Pocket Filling ( Mtr.Cube / Hr)
1	100NB	0.00074	24	1.06
2	150NB	0.0028	22	3.6
3	200NB	0.0056	22	7.3
4	250NB	0.011	22	14.5
5	300NB	0.021	22	27.7
6	350NB	0.031	20	36
7	400NB	0.038	18	41
8	500NB	0.094	18	101

Customized Rotary Airlock Valve

Pulverized Coal
Pulverized Coal
Cement
Fly Ash
Flour
Lime
Ore
Soya Straw
Wooden Chips
Grains
Minerals
High Abrasive material
Pneumatic Conveying applications

Quality :

We checked and satisfactory trials ensure the quality of equipment's before supply the equipments.
Electromech always has been a priority to give the service after sales We are providing following certificates of the equipments

Internal Inspection Report
Quality Assurance plan
Geared Motor Routine Test Certificate.
Trial certificates
Raw material Test Certificates etc.

Quality Control and Inspection

All the manufacturing, Fabrication and machining of the equipments is carried out as per relevant Indian / International standard.
The quality control personal check every product as per relevant Quality Assurance plans procedures before dispatched.
We provide excellent reliable sales and service.

Open End Rotor- Rotary Airlock Valve

The open end rotor provides a better air seal due to the vanes extending all the way to the end covers.
Sealing capability is a matter of surface area between the rotor and housing. This is maximized with an open end rotor.
The open rotor has its drawbacks as the material is in contact with the end covers.
For abrasive products this leads to wear problems.
In higher temperature applications, this adds to the tolerances that need to be carefully machined.
Fine materials tend to leak out through the shaft seals if not properly maintained.

Closed End Rotor- Rotary Airlock Valve

It is primarily intended for gravity flow applications or the bottom of dust collectors.
When allowed, the closed end rotor is ideal for abrasive and high temperature applications.
In abrasive applications, the product is kept away from the end covers where most wear takes place.
In high temperature situations, the gap between the end cover and rotor eliminates any expansion concerns, leaving only the diameter to be machined.

Fixed Blades

With fixed blades there is no concern with rotor tips coming loose or hardware falling off into the material stream.
Fixed b lades are also thicker and more rigid than adjustable tips.
As product can become trapped under the adjustable blades, fixed blades are also preferred in sanitary type applications such as food and pharmaceutical.
Some products are also sticky or sluggish, and the fixed blade rotor allows these products to more easily leave the pocket.

Adjustable Tips

Adjustable tips are required for applications in which special tips are required.
This is discussed in more detail below.
Some people also prefer adjustable tips as they believe the tips can be adjusted up as they wear.
Usually though wear is uneven, and impossible to bring the tip up to the original tolerances when new.

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