Mark VIII Stainless Steel Shutoff & Regulating Valves
Catalog 82

All Mark VIII Stainless Steel Valves use CPV’s soft-seated valve design.  The positive flow control of these valves aboard U.S. Navy nuclear submarines has proven reliable for more than three decades.  Chemical process piping and mixed gas diving systems have experienced the same trouble-free operation.  Engineers designing instrumentation and process systems where bubble tight operation is required to 3000 psi can specify Mark VIII Valves with complete confidence. 

The valve bodies are forged stainless steel, and all wetted surfaces are of 316 stainless steel.  Valve threads are above the stem seal to facilitate external lubrication without internal fluid contamination. When ordered with O-SEAL flat-faced O-ring union end connections, the valve offers the convenience of “slip in, slip out” operation; springing or cutting a line to add a new valve is no longer necessary.  

Mark VIII Stainless Steel valves are offered in two orifice sizes (1/8” or 5/8”) and can be ordered with up to four different seal materials in either angle or globe body styles.  Moreover, NPT, SAE and direct weld/braze socket end connections are also available.

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Contents		Catalog No.	Page
	Design	-	2
	Overview	-	3
	Technical Data / How to Order	-	4
End Connections)
O-Seal End Connection (U)		-	5
Braze/Weld End Connection (H)		-	6
Straight Thread End Connection (T)		-	6
Male NPT end Connection (M)		-	7
Female NPT End Connection (F)		-	7