Product Category: gate valve flange 
 Product Name: pneumatic flange valve 
 Product Model: Z641H-16C-DN100 

 The advantages and characteristics of pneumatic flange valve structure 

 1, reasonable design, reliable sealing, smooth channel, small coefficient of flow resistance. 
 2, gate, seat sealing surface too to the surfacing or the Secretary of iron-based alloy (stellite) cobalt-based alloy surfacing from wear-resistant, high temperature resistance, corrosion resistance, anti-abrasion performance and long service life . 
 3, the flexible wedge gate or steel wedge single gate structure in large-diameter set rolling bearing, flexible switch open and close easily. 
 4, stem quenched and nitride surface treatment, good corrosion resistance, scratch resistance and abrasion resistance. 
 5, can be a variety with standard pipe flanges and flange sealing surface to meet a variety of project needs and user requirements. 
 6, the full range of body materials, packing, gaskets, according to the actual working conditions or user request for reasonable matching can be applied to all kinds of pressure, temperature and medium conditions. 

 Pneumatic flange valve for pipeline in the petroleum, chemical, fire, power plants and other working conditions, cut off or connect the pipe media. By choosing different materials Suitable medium: water, oil, steam, weak acid-base solution. The mode of operation: manual, gear transmission, electric, pneumatic and other. 

 Pneumatic flange valve parts and materials 

 Valve body: WCB, ZGCr5Mo, CF8, CF8M, ZG1Cr18Ni9Ti, CF3, CF3 
 Bonnet: WCB, 12CrMoV, ZGCr5Mo, 304, CF8, 316, CF8M, CF3, CF3, 316L 
 Stent: WCB, CF8, CF8M, CF3, CF3 
 Ram: WCB, ZGCr5Mo, CF8, CF8M, CF3, CF3 
 Stem: 2Cr13 25Cr2MoV,,, 1Cr18Ni9Ti 
 Seat: 25,304 
 Gaskets, gasket ring, sealing ring: jacketed gaskets, 304, reinforced flexible graphite 
 Packing: Reinforced Flexible Graphite 
 Gate rod nut: ZCuA110Fe3 

 Pneumatic flange valve standards and specifications 

 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 12 220