... valve CE,ISO Cert. 3 years warranty 1000000 times life MBV2...ELECTRICDYNAMIC BALANCE VALVEParametervalve bodymaterial:brass(Cu>=57%)stem seal:EPDMmedium ... :+-3%selected tablemodelDNL(mm)H1(mm)H2(mm)D(mm)MBV2.20209588.5333/4GMBV2.252510189331Gplease according to the balance valve's ...