Product Category: gate valve flange 
 Product Name: small-bore stainless steel valve 
 Product Model: Z41W-16P-for DN20 

 The advantages and characteristics of small-diameter stainless steel gate 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. 

 Gate valve in the pipeline for petroleum, chemical, fire, power plants and other working conditions, cut off or connected piping 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. 

 Small diameter stainless steel gate 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 

 Small-diameter stainless steel gate 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 

 The small-diameter stainless steel gate valve installation, maintenance, and precautions 

 Hand wheel, lever and the transmission mechanism does not allow for the lifting, and forbid the collision. 
 Gate Valve should be installed vertically (ie stem in a vertical position, the hand wheel at the top). 
 The valve opening should be preceded with a bypass valve to open the bypass valve (to balance imports and exports and reduce the pressure opening force). 
 Gate valve with a drive mechanism, according to product instructions for the installation. 
 If the valve is often switch to a month at least lubricating once.