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Solar Air Vent

Solar Air Vent
Solar Air Vent
Product Code : 28
Product Description

This automatic air vent valve is a single float valve designed for solar thermal energy plants, and carries out two main functions: the evacuation of a consistent air flow through the system (e.g. during loading/pressurization of the plant), and degassing which discharges air trapped in the pipeline, while functioning, in particular in the solar collectors. This valve has a paramount importance in solar thermal energy plants, evacuating and discharging trapped air in the pipelines and in the solar collectors. As a matter of fact, the presence of oxygen in the system can provoke numerous negative phenomena such as anodic corrosion, localized noise, air pockets, obstructions, etc., which may significantly compromise the performance and integrity of the systems. These valves are usually installed at the summit of the primary circuit in a solar thermal energy plant, and are resistant to the high temperatures that the heat-transfer fluids can reach, even in stagnation phases. Their suitability for application in solar thermal energy plants conforms to EN 12976 and EN 12977.
Pressure : 
Maximum allowable pressure (PN) 10 bar
Minimum sealing pressure 0.2 bar (Grade A according to EN 12266-1)
Range of operation air evacuation from 0.5 bar to 5 bar (tolerance ± 10% max. detected)
Temperature : 
Maximum allowable working temperature (TS)  180° C (200° C in brief periods)
Compatible fluids : 
Glycolate solutions (glycol) water and fluids Group 2
Heat transfer fluids in compliance with Italian national standards (UNI 8065 - 6) 
Generic Fluids 50%
Pipeline connection  Threads according to ISO 228/1
Requirements and tests as per :  
EN 1074-4
Body and Plug in brass   EN 12165 - CW617N
Seat and internal mechanisms   Brass - EN 12164 - CW614N
Gaskets and o-ring   FLUORINATED RUBBER (VITON - FPM)
Spring and counterweight STAINLESS STEEL EN 10088-14310 (AISI 302)
Nickel plating ELECTRODEPOSITED COATING EN 12540 (Cu/Ni5s)



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