... er ... I only use steam distillation now, and have done so for about a year at least. And its close to that long since my rig had any metalwork, Well, excluding the condenser.Oh well you guys may figure it out eventually.
Some of these questions have been answered before, ...
When you turn a steam injector off, you can collapse your boiler. There is a pic here
http://homedistiller.org/forum/viewtopi ... &start=120" onclick="window.open(this.href);return false;" rel="nofollow
This page also has a solution to this, which works that avoids over pressure, protects the boiler from collapse, and if you put a thermal cutout on the end, it will switch off when things boil dry to protect your element (like an electric jug).
This page also has the cycle diagram for the hammer, and a picture of an injector that doesn't hammer.