Product Category: gate valve flange 
 Product Name: Z41H - cast steel gate valve 
 Product Model: the Z41H - 16C-DN100 

 Z41H cast steel gate valve Overview: 

 Z41H cast steel gate valve opening and closing parts of the ram, the ram direction of motion perpendicular to the direction of flow, the gate valve can only be fully open and fully closed, can not be adjusted and the throttle. Gate two sealing surface, the most common mode of gate valve sealing surface formed two wedge, the wedge angle with the valve parameters, usually 50, the medium temperature is not high, 2 ° 52 '. Wedge gate valve can be made into a whole, called the rigid damper; trace deformation of the gate can also be made to improve their craft, to make up for the sealing surface angle deviation in the process, this The gate is called the elastic damper. 
 The type of cast steel gate valve, the sealing surface configuration can be divided into wedge gate valve and parallel gate - gate valve wedge gate valve can be divided into: single gate, double plate and the flexible gate type ; parallel gate valve can be divided into single-ram type and double plate. According to the valve stem threads are divided into rising stem gate valves and rising stem valve two. 
 The cast steel gate valve is closed, the sealing surface can only rely on media pressure to seal, that is, the medium pressure to the sealing surface of the ram pressure to the other side of the seat to ensure the sealing surface of the seal, which is self-sealing. Most of the valve is sealed by force, the valve is closed, we have to rely on external force to the ram pressure to the valve seat to ensure that the sealing surface of the seal. 
 The cast steel gate valve with the valve stem with a linear motion, called the lift rod valve (also called clear shot valve). Usually lift rod with trapezoidal thread, the rotary motion into linear motion through the valve at the top of the nut and the guide groove on the body, that is, the operating torque thrust into action. 

 The advantages and features of the Z41H cast 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. 

 Gate valve of the main 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 

 Z41 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