Spiral Bourdon Tube - Bourdon tube work hardening can cause premature rupture in a pulsation type service, especially if that service is above 1,000 psi, where heavy wall thickness of the Bourdon tube is encountered. 


McDaniel, therefore, incorporates an annealled* spiral Bourdon tube as the sensing element of all gauge ranges above 1,000 psi to minimize Bourdon tube failure possibilities.

(* - All stainless steel Bourdon tubes are annealed.)