Product Category: gate valve flange 
 Product Name: stainless steel valve DN40 
 Product Type: Z41W-25P-DN40 

 Stainless steel valve product description 

 Stainless steel valve DN40Z41W-25P-the DN40: Body, bonnet, gate, gate pole using the stainless steel valve seat sealing surface PTFE, stainless steel + carbide or hardfacing carbide filler commonly used hard Carbide, PTFE, asbestos, graphite or flexible graphite. Nominal size DN15 ~ DN800, working pressure 1.6MPa ~ 20.0MPa, Applicable temperature ≤ 200 ° C, stainless steel gate valve widely used in petrochemical, power plants, oil, steam piping, nitric acid, weak corrosive medium for connect or disconnect the line of the opening and closing of media devices. 

 Stainless Steel Gate Valve Features 

 An austenitic stainless steel has good corrosion resistance oxidizing acid media. 
 2 medium flows through the stainless steel gate valve does not change its flow direction, the fluid resistance is small. 
 Gate movement direction and the direction of media flow is perpendicular to the opening and closing torque is small, open and close more effort. 
 (4) the direction of media flow unrestricted, non-spoiler, not reduce the pressure medium can flow from any direction of the gate valve on both sides of, were able to achieve the purpose of use is ideal for medium flow direction may change in the pipeline. 
 Gate vertical in the valve body, the structure of a shorter length. 
 6. Good sealing performance. When fully open, the sealing surface by erosion. 

 Stainless steel valve for media and application of temperature 
 Shell material 

 Suitable medium 

 Applicable Temperature (℃) 
 Carbon steel (C type) 

 Water, steam, oil 

 ≤ 425 
 Chrome-nickel-titanium steel (P) 

 Nitric acid 

 ≤ 200 
 Chrome-nickel, molybdenum and titanium steel (R type) 

 Acetic acid 

 ≤ 200 
 Chromium molybdenum steel (I type) 

 Water, steam, oil 

 ≤ 550 

 Stainless steel valve parts and materials 
 Body, bonnet 

 Valve plate, seat 

 Stem 

 Stem Nut 

 Filler 

 Handwheel 
 Carbon steel 

 High-quality carbon steel + hard alloy or stainless steel 

 Chromium stainless steel 

 Aluminum bronze 

 Graphite asbestos packing 

 Malleable cast iron 
 Chrome-nickel titanium steel 

 Stainless steel, stainless steel + Carbide 

 Chrome-nickel titanium stainless steel 

 Aluminum bronze 

 Baptist PTFE 

 Malleable cast iron 
 Chrome-nickel, molybdenum and titanium steel 

 Stainless steel, stainless steel + Carbide 

 Chrome-nickel, molybdenum and titanium stainless steel 

 Aluminum bronze 

 Baptist PTFE 

 Malleable cast iron 
 Chrome-molybdenum steel 

 Alloy steel + carbide 

 Chromium molybdenum aluminum steel 

 Aluminum bronze 

 Flexible asbestos +33.4 

 Malleable cast iron 

 Stainless steel valve implementation of standards 

 Design specification: GB / T 12234 
 The length of the structure: GB / T 12221 
 Connecting flanges: JB / T 79 
 Test and inspection: JB / T 9092 
 Pressure - Temperature: GB / T 9131 
 Product ID: GB / T 12220