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BDF/DF series Vaccum Butterfly
1.Body is made of high quality carbon structural steel, the precision casting and become, is suitable for any environment.
2.Work improperness absorption of Germany advanced technology to improve the valve sleeve structure,link is fully enclosed structure,appearance no riveting,seal more reliable.
3.Stem choose fine alloy quenched and tempered steels, surface spraying hard, durable.
4.Standard fasteners are all made of stainless steel materials(1Cr18Ni9Ti)
2.Working temperature -40℃-+120℃
3.Assembly in the open and closed oil pressure of 0.6-0.6 MPa, no oil leakage
4.Vacuum test:within 10 min steam leakage rate < 1.33 Pa * L/s
5.Open and close freely, no card lag phenomenon easily.
6.Product quality commitment, under normal use, if there is any quality problem,
free replacement within five years.