A control for {HEAD ~ a liquid level regulating system} including a casing which is immersed in the liquid to a depth at which {TAIL ~ 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 a casing which is immersed in the liquid to a depth at which { TAIL ~ 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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