Rotary valve for powder and granular material handling
Suitable for gravity feeding, positive pressure and vacuum pneumatic conveying systems
A rotary valve is a critical component used to regulate and control the flow of dust, powder and granular materials in pneumatic conveying, gravity feeding and dosing systems. Gimat's line of rotary valves for material handling applications offers a comprehensive solution to regulate the flow of dust, powder and granular products with utmost precision. Building on our expertise in the field, we have introduced a range of rotary feeders that can be seamlessly integrated into existing installations or purchased separately. This new, patented model is available in the sizes DN 100, 150, 200, 250, 300 and 350.
ATEX - Explosion Proof Protected
Gimat AISI 304 or 316 stainless steel rotary valves are designed and manufactured in compliance with the Directive ATEX 2014/34/EU FOR ZONE 2-22 / ZONE 1-21 and MOCA 1935/2004.
models and dimensions
Standard flange fitting
| model | dn | ØA (mm) | ØB (mm) | C (mm) | E (mm) | F (mm) | G (mm) | H (mm) | sectors | sector capacity | useful capacity** | temperature range |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rv100 | 100 | 200 | 170 | 72 | 6*m10 | 401 | 123 | 389 | 8 | 0.104 L | 635 L/h | -20°C to +100°C, optional +150°C |
| Rv150 | 150 | 250 | 220 | 92 | 6*m12 | 514 | 175 | 456 | 8 | 0.35 L | 2100 L/h | -20°C to +100°C, optional +150°C |
| Rv200 | 200 | 300 | 270 | 92 | 6*m12 | 564 | 220 | 485 | 8 | 0.64 L | 3840 L/h | -20°C to +100°C, optional +150°C |
| Rv250 | 250 | 350 | 320 | 112 | 6*m12 | 618 | 273 | 591 | 8 | 1.3 L | 7800 L/h | -20°C to +100°C, optional +150°C |
| Rv300 | 300 | 430 | 400 | 130 | 6*m16 | 724 | 326 | 610 | 8 | 2.1 L | 12800 L/h | -20°C to +100°C, optional +150°C |
| Rv350 | 350 | 480 | 450 | 150 | 6*m16 | 750 | 380 | 673 | 8 | 3.45 L | 21000 L/h | -20°C to +100°C, optional +150°C |
** Filling rate 60% - 21 rpm
Operating pressure: from –0.8 barg to +0.8 barg, based on 60% vessel filling level
PN10 UNI EN 1092-1 flange fitting
| model | dn/od | ØA (mm) | ØB (mm) | C (mm) | E (mm) | F (mm) | G (mm) | H (mm) | sectors | sector capacity | useful capacity** | temperature range |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rv150 | 150 162 |
285 | 240 | 130 | 8*m16 | 514 | 175 | 479 | 8 | 0.35 L | 2100 L/h | -20°C to +100°C, optional +150°C |
| Rv200 | 200 213 |
340 | 295 | 130 | 8*m16 | 564 | 220 | 507 | 8 | 0.64 L | 3840 L/h | -20°C to +100°C, optional +150°C |
| Rv250 | 250 267 |
406 | 350 | 160 | 8*m16 | 618 | 273 | 540 | 8 | 1.3 L | 7800 L/h | -20°C to +100°C, optional +150°C |
| Rv300 | 300 317 |
483 | 400 | 178 | 8*m20 | 724 | 326 | 675 | 8 | 2.1 L | 12800 L/h | -20°C to +100°C, optional +150°C |
** Filling rate 60% - 21 rpm
Operating pressure: from –0.8 barg to +0.8 barg, based on 60% vessel filling level
Comparison between a classic rotary valve and Gimat rotary valve
| feature | Gimat rotary valve | Standard rotary valve |
|---|---|---|
| dimensions | Compact and lightweight | Large size |
| Connection | Upstream and downstream direct connection by round flange | A manifold is required to adapt from square to round flange |
| Bridge-breaker | Entering the upper carpentry, the rotor also has a bridge breaker function, to facilitate material withdrawal | The rotary valve doesn't act as a bridge breaker |
Cyclone and rotary valve assembly
features
Useful flow rate: from 2 to 13 m3/h
For those requiring precise dosing capabilities, our rotary valves can be easily controlled using an inverter
Easy cleaning and maintenance, thanks to the compact and lightweight body, featuring a protruding rotor
Specifically crafted for pneumatic conveying systems operating under either depression (maximum -0.8 barg) or low pressure (maximum +0,8 barg).
With round flanges at the inlet and outlet, our rotary valves are particularly well-suited for vertical installations
It can be easily converted into a blow-through rotary valve by adding a sleeve at the bottom, connected to the pneumatic conveying pipeline.
In the same product line see also:
Lump breakers
Unrivalled installation experience — try it with total confidence under our 30-day trial policy
Unsure how it will integrate with your setup? You have 30 days to test our rotary valve and ensure it perfectly fits your requirements.
*This trial offer is only applicable for UK based businesses, for full terms of this offer please contact our UK office using the contact information within our website.
Applications of our rotary valves for the chemical industry
Optimised powder transfer for feeding dissolvers
Several chemical companies have frequently expressed shared needs in optimizing powder transport to dissolvers, prompting us to develop an ideal solution tailored to these specific requirements. Below are the key objectives we addressed in designing our system:
- Controlled and dosed flow: ensuring a steady and precise feed into the dissolver to optimise dissolution and minimise waste.
- Ease of disassembly and cleaning: a design that facilitates quick interventions, crucial for production changeovers or maintenance.
- Compliance with ATEX dust directives: full adherence to safety standards for handling powders in explosive-risk environments.
With our rotary valves ensuring vacuum integrity within the system, this solution incorporates best practices and cutting-edge technologies to comprehensively address industry requirements, ensuring efficiency, safety and operational flexibility. Read more about this: Gimat rotary valves for feeding dissolvers.
Applications of our rotary valves for the chemical and plastic industries
Effective powder containment: a common challenge
In the chemical and plastics industries, controlling the dispersion of powder in the working environment is a common challenge faced by many companies. Recognizing the widespread need for solutions in this area, we have developed systems specifically designed to address these critical requirements:
- Advanced powder containment: minimizes powder dispersion to improve workplace safety and maintain a clean operational environment.
- Optimized for long-distance conveying: supports reliable pneumatic transport over extended distances.
- Cost-effective design: delivers high performance while maintaining affordability for plant operations.
- High throughput capability: handles high flow rates to ensure efficiency in demanding production scenarios.
We present an example of this solution implemented with our rotary valve, designed to achieve a flow rate of 4000 kg/h over a conveying distance of 60 meters while effectively containing powder dispersion. Further details about this application are available on the project page Gimat rotary valves for powder containment.
Applications of our rotary valves for the food industry
Rotary valve between the Big Bag unloading station and a centrifugal sieve (dense phase conveying)
In the food industry, precise handling of powdered materials is essential to ensure efficiency, cleanliness and product quality. An effective system integrates a Big Bag unloading station equipped with a vibrating hopper and a dust-tight seal at the bottom of the Big Bag. The rotary valve, positioned below the hopper and above the centrifugal sieve, plays a critical role in maintaining vacuum integrity, accurate dosing and reliable pneumatic conveying downstream.
- Dust-tight Big Bag unloading: the vibrating hopper, combined with a dust-tight seal, ensures efficient emptying of the Big Bag while preventing powder dispersion.
- Accurate product dosing: the rotary valve guarantees a controlled and steady flow of material into the centrifugal sieve and downstream pneumatic transport system.
- Optimised pneumatic conveying maintains consistent powder flow to the packaging machine while minimizing demixing of the material.
This solution provides a reliable and hygienic system for powder handling, integrating dust control, precise dosing and efficient pneumatic conveying. For a detailed example of its implementation in a food production facility, visit the dedicated project page. Gimat rotary valves - compact vertical placement.
Applications of our rotary valves for the plastic industry
Replacement of a rotary valve located at the outlet of a cyclone filter
The customer needed to replace an old rotary valve that was having leakage problems due to excessive wear.
The existing solution was also unable to guarantee with some of the dust extracted a regular flow of product to the outlet of the cyclone filter due to the dust being compacted in the lower part of the cone.
The GIMAT rotary valve, thanks to the unique design of its rotor blades protruding inside the cyclone - cone and the reduced clearances between the rotor and the valve body, made it possible to solve both problems with a single machine.
GIMAT's flexibility in making the connection flanges both upstream and downstream of the rotary valve made it possible to provide the customer with a complete solution within a short timeframe.
