P:	10 kg/cm2 (Mh3u), 25 kg/cm2 (Mh3b) 2
T:	-20~200oC
V:	15m/s
D:	10mm~80mm
Materials:
Head:	S.Steel, Carbon, SiC, TC.
Seat:	S.Steel, Carbon, SiC, TC.
O-Ring:	NBR, EPDM, Viton, FEP,AFLAS