When a teat is inserted into the milking inflation, these valves will automatically open, turning on the vacuum to the teat end, When the liner is removed, the valve will close. The ITP 205 has a manual lever for locking the valve in the open position for use during washing where the fluctuating vacuum level causes the valve to close inadvertently.US Price: $83.73
A normally closed valve which helps when trying to build vacuum in a milking system, will automatically open when the valve is attached to the teat (or when the vacuum builds in a system during wash). The ITP 207 can be operated manually by pressing the diaphragm on the bottom of the valve.US Price: $83.73