Grinnell Valves, Series GHP High Performance Butterfly Valve, Overview


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		Body Material & Standard: Carbon Steel ASTM A216-WCB or 316 Stainless Steel ASTM A351-CF8M DISC Material & Standard: 316 Stainless Steel ASTM A 351-CF8M Stem & Taper Pins Material & Standard: 17-4PH ASTM A 564 Cond. H10751-CF8M Gland Bridge Material: 17-4SS PH Packing Material: PTFE or Graphite Bearings Material & Standard: 316 SS Nitride	Seat Retaining Ring Material & Standard: Carbon Steel ASTM A36 or Stainless Steel ASTM A240 Seat Material & Standard: RTFE Reinforced polytetrafluoroethylene [optional: PTFE]
		Two-Piece Stem Design Two-piece stem disc geometry maximizes flow capacity by increasing the available flow area through the valve. This increase in disc efficiency results in higher valve Cv.
		COMPETITOR one-piece stem	HI-SEAL two-piece stem
		Aspect Ratio = Open Area ÷ Disc Area