check valves 

Dm40-60mm PN1.0-1.6Mpa

Body :DUctuile iron , Cast Iron, Carbon steel, Stainless Steel

Seat :EPDM  NBR Stainless steel, with Body Material

Stem: Stainless steel . with the body material 

Disc: Ductile Iron with Nylon coating, Ductile iron with Nickle Coating , Stainless steel, Alu-Brst

steel check valves : ApI6 d

steel check valves : ISo 1 4313

Steel valves:asme b 16.34

face to face : asme b 16.10

Butt welding ends:ASME B 16.25

Inspection and test : API 598/API 6D

design description 

BB, bolted bonner , cop 

swing type anti-rotation disc

renewable seat rings

horizontal or vertical service

flanged or butt weiding ends

Surface smooth of  Nylon coating and small fluid friction resistance environmental protection and energy saving.

Without toxicity and antibacterial anti-mildew of Nylon material is green environmental protection.

Better  economy efficiency of  Nylon disc valve, lower price than that stainless steel valves.

Halar is ethylene,Chlorotrifluor Ethylene (CTFE) alternating copolymer, and it has excellent chemical stability and incombustible, as well as good electric performance and mechanical performance, and general processing thermoplastic plastic molding methods available. Halar powder coating for corrosion protection coatings, widely used in chemical industry, pulp and paper industry, pharmaceutical industry, food industry and semiconductor industry etc.