Welded vacuum | valve, NKZ61, NKZ64 
 The main performance specifications 
 ? Test pressure Test pressure 
 Nominal 
 PN / MPa 
 Nominal 
 pressure test pressure / MPa Seal test 
 Shell strength test 
 Shellslrenght test on the seal test 
 Back Seal test seal test 
 Seat test 
 2.5 3.8 2.8 2.8 
 4.O 6.0 4.4 4.4 
 6.4 9.6 70 7.O 
 1O.O 15O 11.O 11.O 
 ? use of Applicable 
 Product Type 
 Product 
 calssification Medium 
 Applicable medium suitable temperature / ℃ 
 Applicable temperature 
 NKZ61H 
 NKZ64H HC type 
 NKZ964H HC type 
 NKZ961H water, steam, air 
 Water, Steam, Air ≤ 425 
 NKZ61H 
 NKZ64H YI-type 
 NKZ964H YI-type 
 NKZ961H water, steam, air 
 Water, Steam, Air ≤ 550 
 ? Major parts material Materials for main parts 
 Part Name 
 Part name Body, Bonnet 
 Body Bonnet stem 
 Valve stem gate 
 Wedge gate sealing surface 
 Sealing face stem nut 
 Valve Yoke nut filling 
 Parking Fasteners 
 Fastener 
 NKZ61H 
 NKZ64H HC type 
 NKZ964H HC type 
 NKZ961H WCB 2Crl3 25 H: steel 
 H: alloysteel aluminum bronze 
 Albronze expanded graphite composite 
 Expanding 
 compound 
 graphite-quality carbon steel 
 High-grade 
 carbon steel 
 NKZ61H 
 NKZ64H YI-type 
 NKZ964H YI-type 
 NKZ961H Cr-Mo steel 
 Cr.Mo steel 20CrlMo1VA Cr-Mo steel 
 Cr.Mo steel Y: Carbide 
 Y: carbide alloy Cr-Mo steel 
 Cr.Mo steel 

 ? dimensions and weight of Main dimensions and weight 
 DN 
 DN / mm 
 Nominal 
 diamecer Nominal 
 PN / MPa 
 Nominal 
 pressure main dimensions and connection dimensions / mm 
 Main external andconnecting dimensions Weight / kg