Stem-guidedvalve & Cross-arm seatfeatures an extra wide metal to metal sealon the valve flange. The serrated upper surface on the valve gives a longernon-breathing seal between valve body and insert while the rigid seatcross-arms give greater strength and positive sealing.
The strong, thick, valve knock off nut holds the insert tightly reducing flexand breathing which lessens the chance of foreign matter getting between valveand insert.
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Standard Plate Type Valve