P:	15 kg/cm2
T:	-20oC~200oC
V:	20m/s
D:	1.125"~4.000"
Materials:
Head:	Ceramic Coating, S. Steel, SiC, TC.
Seat:	Carbon, SiC, TC.
O-Ring:	.NBR, EPDM, Viton, PTFE ,AFLAS