Rotor Valve is mostly vapor as long as the oil is vac oil and will vaporize at around 170ish. Otherwise and when you put it back together some grease is a good insurance policy.

To slow is bad. No heat so no oil to the top end other than any that makes it by the piston. No heat and more water in the crank case and the crank will become rusty. Cool pumps are dead pumps. It is far better to turn off a pump hot than to let off the vac and have a lot of cool or cold air drop the housing or case temp and then shut her down.

With the good oil just a 6-12" section of vacuum hose with a stall cock on the end is a cheap catch and drain for the water.

I took 2 gallons out of my reclaimer yesterday. It finally thawed out and let the drain work well. It had been so cold most of the winter I would only get a few drops out since the pump was running such high vac and not putting much heat into the reclaimer. Also the reclaimer is for a 150 cfm pump and not a 6 cfm that is on it. I guess I need to make a smaller version of the unit unless we are going to have to run the large pump.

Post a pic of the rotary valve in the top so people can see what we are talking about. Many don't realize what is inside one of these units. Pretty neat engenering from the 1950's and before for the bb2.

Ben