paulpaul
Guest
Hello everyone
I am finding it difficult to find a membrane expansion vessel suitable for ambient temperatures of -30/-40 °C: it seems that Italian producers (and not only...) are all calibrated on a minimum temperature of -10 °C.
the application is the classic one of these devices: accumulation, maintenance of pressure and degassing of a hydraulic circuit: It is the first time I use this solution with these temperatures, having in the past always used tanks equipped with safety caps that however present other types of inconveniences, at least in these circuits.
I was wondering if someone had experience of applications with expansion vessels at low temperatures and could give me some name from some manufacturer, even abroad.
Thank you in advance.
Palo
edit
I forgot other useful data to frame the problem:
necessary volume of the tank: between 25 and 50 liters
gas preload pressure: 0.5 bar (the altimetric development of the circuit is negligible)
safety valve calibration pressure: 5 bar
fluid working temperature range (water + ethylene glycol max 50% vol): 0/60 °C
I am finding it difficult to find a membrane expansion vessel suitable for ambient temperatures of -30/-40 °C: it seems that Italian producers (and not only...) are all calibrated on a minimum temperature of -10 °C.
the application is the classic one of these devices: accumulation, maintenance of pressure and degassing of a hydraulic circuit: It is the first time I use this solution with these temperatures, having in the past always used tanks equipped with safety caps that however present other types of inconveniences, at least in these circuits.
I was wondering if someone had experience of applications with expansion vessels at low temperatures and could give me some name from some manufacturer, even abroad.
Thank you in advance.
Palo
edit
I forgot other useful data to frame the problem:
necessary volume of the tank: between 25 and 50 liters
gas preload pressure: 0.5 bar (the altimetric development of the circuit is negligible)
safety valve calibration pressure: 5 bar
fluid working temperature range (water + ethylene glycol max 50% vol): 0/60 °C