A control for {HEAD ~ a liquid level regulating system} including {TAIL ~ a casing} which is immersed in the liquid to a depth at which control is to be effected, a loose flexible diaphragm closes the casing at the bottom and is moved in accordance with the liquid head 
A control for { HEAD ~ a liquid level regulating system } including { TAIL ~ a casing } which is immersed in the liquid to a depth at which control is to be effected , a loose flexible diaphragm closes the casing at the bottom and is moved in accordance with the liquid head
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH