VESSEL MOUNT 



ELECTRICAL CONNECTION 

 CAP 



HOLD-DOWN BOLTS 

 0-RING SEAL 



CAPSULE 



■SOLENOID FILL AND DRAIN VALVE 



Pressure vessel accommodates transducers up to 22 

 inches in diameter and 36 inches long. Electrical 

 leads are coupled to watertight connectors and ex- 

 tended to calibration equipment. H i gh- pr es sure 

 solenoid valve permits filling or draining of ves- 

 sel as it is lowered or raised. Pressure relief is 

 provided by bolts of high tensile st rength and 

 nuts which strip on pressure increase to failure 

 limit (three times operat ing pressure of 800 ps i g ) ; 

 when threads strip, cap rises slightly and water 

 escapes past 0- r ing seal. 



