The housing 12 has a cup shaped design with a ventilation opening 14 arranged at one end and {HEAD ~ a valve seat} 15 arranged at {TAIL ~ the other end} 
arranged at
The housing 12 has a cup shaped design with a ventilation opening 14 arranged at one end and { HEAD ~ a valve seat } 15 arranged at { TAIL ~ the other end }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL