Item/Function	Potential Failure Mode(s)	Potential Effect(s) of Failure	Sev	Potential Cause(s)/Mechanism(s) of Failure	Occ	Current Design Controls	Det	RPN	Recommended Action(s)
	Center bolt material, Gasket	Debris in shaft	Poor gas flow	6	Improper material selection, valve exceeding lifetime	5	Material extensively researched	7	210	Screen the valve, more research on proper gaskets and center bolt
	Valve Plates/Spring/Gaskets	Corrosion of Parts due to gas type	Gas leakage, excessive wear, valve failure	8	Incorrect material choice, excessive temperatures	4	None	6	192	Research all material choices
	Center bolt and housing	Overall height of valve incorrect, Piston interference	scar piston, bend rod, valve damage	9	improper dimensions	2	following design parameters closely, check valve clearance with piston	2	36	Run clearance test prior to installation