Low-pressure ejectors made of carbon or stainless steels are designed for use in pneumatic transportation systems, dust, gas, steam and air mixtures in various industries.
The medium should not contain impurities whose chemical aggressiveness does not cause accelerated corrosion of the ejector metal structure (corrosion rate not exceeding 0.1 mm/h).
Operating conditions:
- ambient temperature from -40 to +80 ° C
- relative humidity up to 80% at a temperature of 25 ° C
- hydraulic resistance in the suction network not more than 3000 Pa
- at the place of installation of the fans, the root mean square value of the vibration velocity from external vibration sources should not exceed 2 mm/s.
The ejector consists of individual components assembled into a single block using bolted connections.
The composition of the block:
- diffuser
- camera
- confuser
- housing
- supporting flange
The air flow supplied from the fan to the discharge pipe, passing through the confuser and the camera, creates irritation in them due to its acceleration in the narrowing section. A thrust is generated in the housing and the associated suction nozzle.
Mounting of ejectors should be carried out by specialized organizations and enterprises.
Installation of ejectors on objects subject to vibrations with a vibration velocity of more than 2 mm/s is not allowed.
The location of the ejectors should ensure safety and ease of maintenance and repair.
Prior to installation, the ejectors must be inspected and their installation location verified in accordance with their draft documentation.
In case of damage, defects, incomplete delivery of ejectors, their commissioning is not allowed.
The air conductors on the discharge side and the suction side must be connected in a leak-tight manner and must form a closed electrical circuit.
Ejectors should be put into operation after installation and repair only after completion of pre-commissioning tests and execution of the acceptance certificate and other documentation in accordance with the rules for testing and commissioning of ventilation systems.