BKH PN25-50 MPa DN4-25/40 steel / refined steel ; BKH with assembling threads PN25-50 MPa DN4-25/40 steel ; BKH mit Befestigungsbohrungen PN25-50 MPa DN4-25/40 steel ; BKH High pressure with actuator PN31,5-50 MPa DN4-25/40 steel ; BKH Low pressure with actuator PN5 MPa ; MKH PN31,5-35 MPa DN32-50 steel/refined steel ; MKH with assembling threads PN35 MPa DN32-50 steel