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| HYDRAULIC FEATURES | 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. | | TECHNICAL FEATURES | | 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 : |
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| | Maximum allowable working temperature (TS) |
| 180° C (200° C in brief periods) | | Compatible fluids : |
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| | Glycolate solutions (glycol) |
| water and fluids Group 2 | | Heat transfer fluids in compliance with Italian national standards (UNI 8065 § 6) |
| | Generic Fluids |
| 50% | | Threading: |
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| | Pipeline connection |
| Threads according to ISO 228/1 | | Requirements and tests as per : |
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| | EN 1074-4 | | DESIGN | | 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) | | | PRODUCT SIZE | | 12 - M - 3/8" | | 15 - M - 1/2" | | Features Table |
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