Expansion valves - EV Valves
CaffeTech Canada supplies a Wide array Of Expansion Valves for Both Commercial and Domestic applications to the. The Expansion Valves come in a Range Of fitting Sizes from 1/8" BPT to 1/2" BPT . They are designed to set the peak pressure in your brew boiler or Heat Exchanger Circuit. Most espresso machines Ev Valves are set to a peak pressure of 12-bar on bench (this is not to be confused with brew pressure which is set on the pump itself which is set at 9-9.5 Bar). Therefore, the end user will often need to make small adjustments to the valve in order to accommodate the desired pressure.
Commonly used in vibratory Pump applications in order to set pump pressure, The EV Valve has more important functionality in applications where The purpose of an expansion valve, also known as an over-pressure valve ( n those applications), is to release excess pressure in the line once the line has been shut closed. This is required to release the pressure in the espresso machine lines due to heat causing water expansion - typically the brew boiler circuit in a dual boiler espresso machine or a heat exchanger circuit in a Heat Exchanger espresso machine