What is a rotary valve?
Rotary valves (also known as rotary airlocks, rotary feeders, etc.) are pneumatic valves that handle and meter the flow of granular bulk or powders. Material is fed into the valve via a hopper (see Figure 1) or other inlets, handled through the valve rotor, and then deposited onto a conveyor system in discrete packets, all with minimal pressure loss. They are most often used in air conveyor systems to minimize the loss of pressure across the valve, but rotary valves are also used to meter materials at a controlled feed rate. They work almost exclusively in air systems and function as airlocks, explosion/flame barriers, and process isolators, among other tasks. They can move dry to slightly sticky products, and find many applications in chemical and food, pharmaceutical, plastic, and other manufacturing markets.
How do rotary valves work？
Rotary valves are composed of 4 main components: an outer housing, a rotor, a rotor bearing and seal, and a drive. The housing is the rightmost component in Figure 2 and provides the inlet/outlet ports as well as the protective pathway for material through the valve. The rotor is held in place by the rotor bearing, and material is sealed within the valve inner housing via the bearing and shaft seal. The drive mechanism (typically an electric motor) attaches to the rotor shaft from the outside and controls the rotation speed and direction of the rotor. Product is fed into the valve, captured into equal pockets between rotor vanes, and is dispensed in even amounts at the outlets. These rotor vanes have a tight clearance with the housing and prevent pressure losses/material losses through the valve, ensuring pressure differentials remain intact.
Rotary valves are used in almost all pneumatic conveyor systems, but they also find uses in many other applications. This section will display just how indispensable these valves are, and how they can still find new uses.
Some notable applications of rotary valves are:
- Food and chemical processing applications
- Pharmaceutical manufacturing applications
- Abrasive product conveyance/metering
- Plastics manufacturing
- Frequently cleaned/abiotic applications
- Pneumatic conveyance
YJD A/B Specifications
Why choose our rotary valve?
- Compact structure, beautiful appearance, easy to use
- Smooth operation and low noise
- Because the bearing and gearbox are far away from the shell, the high temperature and lubrication are greatly improved
- Products can be designed and manufactured according to customer requirements
- Can this machine be customized?
Yes. You can decide the color, material and size, etc.
- What is your packaging？
We use fumigation-free wooden box packaging.
- How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-30 days if the goods are not in stock, it is according to quantity.
- What payment methods do you support？
T/T, L/C, Western Union, Money Gram,Credit Card are available.