Rotolok Valves

Chittur, Palakkad, Kerala

Maximum number of blades in contact with body at one time without affecting throughput. Good throat opening at valve entry allowing high pocket filling efficiency. Minimum clearance at rotor tips and sides with body. Robust body adequately stiffened to prevent distortion. Heavy shaft diameters minimising deflection. Outboard bearings for non-contamination. Packing gland type seals. Maximising valve speed to 25 rpm -prolonging life, ensuring good throughput. Precision machining of componentsThe prime function of a Rotary Valve is to regulate the flow of dust, powder and granular products from one chamber to another whilst maintaining a good airlock. In the dust filtration field a good airlock is essential on cyclone and bag filter applications in order that the manufacturers quoted high dust collection efficiencies can be maintained. Airlocks are also important in the pneumatic conveying industry, where product is regulated into a pressure or vacuum conveying line while minimising air leakage. With Rotolok there are no double standards, all our standard valves are precision machined for close tolerances and minimal eccentricities. Pressure differentials to 20psi and temperatures to 400C (752F) are considered the norm and extreme pressures and temperatures can be accommodated with special designs. If your application requires such considerations contact the Rotolok Engineering team.

USDA Dairy Accepted Models available conforming to EC 1935/2004 Models available conforming to ATEX 2014/34/EU Clean out of place configuration Smooth product contact surfaces in food grade material Rotor pockets scalloped and polished to Ra=0, 8 m (150 grit) Shock resistant Flameproof versions available to suit St2 products Here at Rotolok, we constantly strive to improve the quality of our equipment and obtain the required and industry recognised certification to provide specialist valves. In February 2018, Rotolok gained approval and certification from the United States Department of Agriculture (USDA) to supply Rotary Valves for use in the dairy, food and chemical industries in the United States. Rotoloks USDA Dairy Accepted line of Rotary Valves are designed for use in sanitary applications in the food, dairy, pharmaceutical and chemical industries where regular cleaning is required to prevent product contamination. The product contact surfaces of the valve are manufactured in 316 Stainless Steel and polished to a 150 grit finish, ensuring that there are no lodgement points allowing the product to flow smoothly. Furthermore, the valve is equipped with a slide rail mechanism allowing for the quick and easy removal of the rotor from the valve body. This addition substantially reduces the amount of downtime and the number of man hours required for the cleaning and maintenance of the rotor and valve internals. Our USDA certified Rotary Valves are available in sizes ranging from 150mm up to 400mm.

Maximum number of blades within the housing at one time without affecting throughput Minimum clearance between rotor tips and body Good throat opening at valve entry allowing high pocket filling efficiency Light-weight minimises loading on connected equipment Compact with direct drive, right-angled gearbox accommodates installation space constraints Cost competitive ideal for integration into systems Inboard bearings for increased shaft rigidity Lip seals provide effective containment with reduced maintenance requirements Precision machining of componentsRotolok introduced a low cost solution to dust collector valve needs. The Dust Collector Valve is a lighter duty option for standard dust collection applications. Constructed with a robust cast iron body and cast iron end covers. Bearings are inboard and shafts are sealed with lip seals. All valves are direct driven with a right angle gearbox and motor. These valves have been engineered and designed solely as a low cost alternative for applications with pressure differentials of 3 psi or less. Available in 150, 200, 250 and 300mm round and square inlet sizes.

Fully machined externals for clean form and function Compact assembly accommodates installation space constraints Easy to clean both internally and externally with easily removable rotor Hygienic all stainless steel design with minimal cracks and crevices Smooth internal surfaces reduces product pick-up and aids pocket emptying efficiency Direct drive with enclosed coupling eliminates problems with cleaning and maintaining a chain and sprocket drive Minimum clearance between rotor tips and body Lip seals provide effective containment with reduced maintenance requirements Precision machining of components The prime function of a Rotary Valve is to regulate the flow of dust, powder and granular products from one chamber to another whilst maintaining a good airlock. It is popularly used in pneumatic conveying systems, both vacuum and pressure, together with cyclone and filter applications. However, the Klean Lok is a more specialist valve. Its modular design makes it an easy-clean valve, aimed specifically at the food, chemical and pharmaceutical industries, where cleanliness, both internally and externally, must be to a high standard.

Maximum number of blades in contact with body at one time without affecting throughput Good throat opening at valve entry allowing high pocket fillage efficiency Robust body adequately stiffened to prevent distortion Heavy shaft diameters minimising deflection Outboard bearings for non-contamination Packing gland type seals Maximising valve speed to 25 RPM prolonging life, ensuring good throughput Precision machining of components Options available for specialisationThe prime function of a Rotary Valve is to regulate the flow of dust, powder and granular products from one chamber to another whilst maintaining a good airlock. The granule type of product, especially if it is a plastic type, polythene or nylon etc., does not shear easily and consequently, without considerable care the standard drop-through type of valve leads to valve seizure and also considerable shock loadings. To minimize these problems the Offset Rotary Valve ensures lower pocket fillage as its design means that the rotor is still being filled in the upward cycle with the pellets falling away at the shear point. Similarly, the pelican beak distributes the product across the full width of the rotor.

Maximum number of blades in contact with body at one time without affecting throughputStreamlined entry and discharge of conveying air through valveGood throat opening at valve entry allowing high pocket filling efficiencyCompact design minimising headroomMinimum clearance at rotor tips and sides with bodyRobust body adequately stiffened to prevent distortionHeavy shaft diameters minimising deflectionOutboard bearings for noncontamination - options for high temperaturePacking gland type seals with air purging optionPrecision machining of componentsAbrasive duty types

Compact design Small divert angle Low pressure drop Smooth internals Pneumatic or Manual Wide range of materials Higher pressure gives greater seal Dust tight to 20 p.s.i. Easy access and maintenance Flanged or Spigotted Ends Pneumatics and switches housed in guard

Compact design Small divert angle Low pressure drop Smooth internals Wide range of materials Higher pressure gives greater seal Dust tight to 20 p.s.i. Easy access and maintenance Flanged or Spigotted Ends

Divert angle ensures good flow conditions Compact rugged design Smooth internals with negligible lodgement areas Simple access and minimal maintenance Pneumatic or manual versions Good sealing effect

Suitable for all types of conveying systems and most materials. Compact design Small divert angle - 30 Smooth internals - no lodgement points Minimal air leakage and cross contamination Pneumatic and/or manual versions Rugged design for up to 4 bar (60 psi) conveying and 10 Bar (145 psi) upset pressure Simple access and maintenance. Aluminium, Cast Iron or Stainless Steel construction

Compact design Small divert angle Low pressure drop - minimal transition effect Smooth internals - no lodgement points Wide selection of materials High sealing efficiencies - with line pressure increasing effectiveness Dust tight enclosures to 20p.s.i. Simple access and maintenance One cylinder direct action operation.

No jamming. All slide plates run on flanged rollers. Minimal leakage. All valves (except enclosed valves) fitted with packing gland type seals. Streamlined design means unrestricted material flow. Available in a variety of styles to suit the application with options of manual, pneumatic or motorised operation.

A compact designNo lodgement pointsDust tight to atmosphere on in-line applicationsStainless steel slide plateAluminium bodyNylon support studsDust sealsAvailable in Round and Square inletsOperation through a lead screw. If chain/chainwheel is required please specify length of chain

Manual or Pneumatic operationCompact design accommodates installation space constraintsFully enclosed housing eliminates product escapement into the environmentStainless steel contact partsSlide plate fully supported throughout open and closing actionPrecision machining of components for repeatability and accuracy

Minimal leakage through robust design and manufacturing Large range of sizes manufactured in-house Pneumatic or manual operation Mild or stainless steel construction

Compact design accommodates installation space constraints Dust tight ensuring product containment and a clean environment Cast aluminium (Rotoflex) or laser cut stainless steel (Slimflex) construction Variety of sleeve materials and configurations can be accommodated to suit the application Easy installation due to lightweight yet robust construction

Robust fabricated construction Compact design with integrated dust control connection Semi-automatic fill level chasing feature Fully enclosed product fill and air return pathways Standard configuration accommodates up to 3 metre travel Flexible design allows for inlet connections and travel to suit most applications Assorted options available covering most installation requirements

Maximum number of blades in contact with body at one time without affecting throughput. Good throat opening at valve entry allowing for high pocket filling efficiency. Minimum clearance at rotor tips and sides with body. Robust body adequately stiffened to prevent distortion. Heavy shaft diameters minimising deflection. Outboard bearings for on-contamination. Packing gland type seals. Maximising valve speed to 25 RPM prolonging life, ensuring good throughput. Precision machining of components.

Cast body and dome for a robust, hard wearing assembly Precision machining of components Full bore throughput when open Ideal for abrasive products such as sand or cement Re-greasable low maintenance bearings and shaft seals

Cast iron casings which are robust and hard wearing Fabricated casings for non-standard sizes and specific applications Motorised actuation as standard with optional gravity counterweight or pneumatics Re-greasable shaft bearings with optional seals to suit the application All models and sizes available to suit high temperature applications Machined inlets maximise clapper plate closing efficiency Suitable for discharge dry dust, powder, granules and fibrous materials from cyclones, filters, hoppers etc., whilst maintaining an effective airlock. The valve consists of two flaps connected by counterweights or spring loaded spindles, which are operated by means of a motor driven cam. The cam alternately opens each flap allowing materials to pass through the separate chambers in batch form and thereby ensuring an airlock. After cam release, the counterweights (or springs), return each flap to the upper (sealed) position and are designed and sized so that a clapping action at the flaps is obtained, aiding material flow and preventing build up at the seal plate. The unit is suitable for pressure differentials of up to 500mm W.G. This can be increased with special features. A fabricated steel body caters for sizes and specials that fall outside the standard 150, 200, 250 and 300mm cast iron body range as well as offering stainless steel construction. Optional hardened steel flaps and inlets can help prolong the valve life in particularly arduous or abrasive applications.

Heavy duty castings maximise operating life 90 and 45 bend configurations Replaceable wearback design has wear-resistant rubber gasket as standard Flange faces machined in-house for repeatable quality control

Heavy duty castings maximise operating life 90 and 45 bend configurations Replaceable wearback design has wear-resistant rubber gasket as standard Flange faces machined in-house for repeatable quality control To cope with a whole list of abrasive materials including sand, cement, quarry dust, granite dust, sinter dust, slag, coal and many others which cause extra wear on pipe bends of conventional material, we provide a range of Ni-Hard castings. Standard and special radius plain bends with and without replaceable wear-back plates are available. Flanged ends as standard, although special designs can be considered. Ni-Hard bends are essential for the efficient conveying of abrasive materials.

Universal assembly suitable for any rotating shaft with a suitable connection Standard assembly for close integration on Rotolok Rotary Valves and Blowing Seals Monitors shaft speeds from 2.5 up to 200 RPM Sensor can be reset to suit Compatible with a range of electrical control systems