The meaning of various letters and numbers in the butterfly valve model

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Material of main parts:

valve body		valve plate		shaft	bushing	valve seat
Material name	code	Material name	code	Material name	Material name	Material name	code	Applicable temperature ℃
grey cast iron	Z	Electroplated ductile iron	B1	Stainless steel carbon steel Stainless steel carbon steel	Lubricated bronze Teflon PTFE Lubricated bronze Teflon PTFE	natural rubber	X1	-20 ~ +85
Ductile Iron	Q	aluminum bronze	B2			Hypalon	X2	-18 ~ +135 short time -18 ~ +149
aluminum bronze	T	ZG1Cr18Ni9Ti Stainless steel	B3			Ethylene propylene rubber	X3	-45 ~ +135 short time -50 ~ +150
ZG1Cr18Ni9Ti Stainless steel	P	Titanium steel	B4			Neoprene	X4	-7 ~ +93 short time -7 ~ +107
CF8M stainless steel	R	CF8M stainless steel	B5			Nitrile rubber	X5	-12 ~ +82 short time -12 ~ +93
carbon steel	C	carbon steel	B6			Wear-resistant rubber	X6	-10 ~ +50
		CF8 stainless steel	B7			fluororubber	X7	-23 ~ +150
						Heat-resistant ethylene-propylene rubber	X9	-20 ~ +150
						Teflon	F4	+10 ~ +150

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