Introduces the working principle of gate valve

    Working principle

    Gate valve is a gate opening and closing parts, RAM direction of motion perpendicular to the direction of the fluid, valve can only be fully open and fully closed, can not be adjusted and the throttle.There are two gate sealing surface, the most common mode of gate valve sealing surface to form two wedge, wedge angle varies with the valve parameters, usually 5 °, medium is not high temperatureis 2 ° 52'. Wedge gate valve can be made into a whole, called the rigid gate; also be made to produce small deformation of the gate,in order to improve its process, make up the sealing surface angle deviations arising during processing, this gate is called the flexible gate. 

     Valve closed, the sealing surface can only rely on media pressure to seal, that media pressure will depend on the sealing surface pressure gate 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, that the valve is closed, to rely on external pressure to force the gate to the seat, to ensure the sealing surface of the seal. 

sprocket

     Gate valve with the valve stem with a straight line, called the lift rod valve is also called the Ming bar gate valve. Usually in the lift rod with trapezoidal thread, through the guide groove nut valve and the valve on the top, the rotary motion into linear motion,which is the operating torque thrust into operation. Open the valve, when the gate valve lift height is equal to 1:1 times the diameter, the fluid flow channel completely, but at run time, this position is unable to monitor.

      Actual use, is the apex of the stem as a symbol, which means that the fixed position, as its full open position.Temperature changes appear to consider locking phenomenon,usually open to the vertex position, and then rewind 1/2 1 circle, as a fully open valve position. Therefore, the fully open position of the valve, press the disc position that trip to determine. 

     Some valve, the stem nut is located at the gate, hand wheel rotation to drive the valve rod, leaving gate to upgrade, this valve is called the rotating rod valve or valve called the dark bar.

     Chinabase Machinery is a group of manufacturing facilities, offering one-stop solution for mechanical power transmission products in China. 

     Chinabase is able to offer custom, cost-optimized solutions in accordance with customer drawings - such as ready-to-install machine parts and profiles - in addition to our standard products. Our internal Application Technology department and field staff are happy to provide free advice on custom solutions.

     Our product range also covers locking assemblies (clamping elements/locking device),Transmission Chain, taper bushes, QD bushes, bolt-on hubs, torque limiters, shaft collars, power transmission equipment,motor bases and motor slides, chain detachers, chain guides, universal joint, fluid coupling,rod ends and yokes. Our products are used in many different industry sector, like in automation engineering, drive engineering, conveyor technology, assembly and handling technology, packaging industries, the beverage, food and medical engineering, pharmaceutical production, and laboratory equipment.

Introduction the Shortcomings of gate valve

     Gate valve   is a gate opening and closing parts, RAM direction of motion perpendicular to the direction of the fluid, valve can only be fully open and fully closed, square I-shaped gate valve sealing surface to form two wedge, wedge angle varies with the valve parameters, usually 5 °, medium temperature is not high to 2 ° 52'.To improve the process of the deviation, make up the sealing surface angle in the process, this gate is called the flexible gate.

    Shortcomings

      Disadvantages: between the sealing surface can lead to erosion and abrasion, repair is difficult. The large dimensions, requires a certain open space, opening and closing a long time. Complex structure.

Valve types, according to the sealing surface configuration can be divided into wedge gate valve and parallel gate valve, wedge gate valve can be divided into: single gate type, dual gate plate and the flexible gate type; parallel gate valve can be divided into single gate type, dual gate plate. 

      Classified according to location of threaded stem, can be divided into the next shot and the dark bar gate valve two.

Agricultural Chain

      Structural features: the market has long been used byThe general prevalence of valve Water Leakage or rustphenomenon, the introduction of European enterprises in rubber and valve manufacturing technology produced by the elastic valve seat seal, the valve seal bad, rust and other defects, elastic valve seat seal using flexible wedge generated trace elastic deformationcompensation function to achieve a good seal, the valve has a light switch, reliable sealing, good elastic memory and life and other significant advantages.

      Can be widely used for water, sewage,construction, petroleum, chemical industry, food, pharmaceutical,textile, electric power, shipbuilding, metallurgy, energy systems,body pipeline regulation and closure devices as.

     Chinabase Machinery is a group of manufacturing facilities, offering one-stop solution for mechanical power transmission products in China. We can supply a full-range of power transmission products, such as chains, Lifting Chain，sprockets and plate wheels, pulleys, gearboxes, motors, couplings,fluid coupling， gears and racks，power transmission equipment，  Chinabase is able to offer custom, cost-optimized solutions in accordance with customer drawings - such as ready-to-install machine parts and profiles - in addition to our standard products. Our internal Application Technology department and field staff are happy to provide free advice on custom solutions.

     

introduction the advantages of gate valve

      Gate valve is a gate opening and closing parts, RAM direction of motion perpendicular to the direction of the fluid, valve can only be fully open and fully closed, square I-shaped gate valve sealing surface to form two wedge, wedge angle varies with the valve parameters, usually 5 °, medium temperature is not high to 2 ° 52'.To improve the process of the deviation, make up the sealing surface angle in the process, this gate is called the flexible gate.

     Advantage.

    1.Small flow resistance. Valve internal media channel is through themedium, linear flow, low flow resistance.

    2.Open and close when more effort. Compared with the valve,because whether it is open or closed, gate movement direction areperpendicular to the flow direction of medium.

    3.Height and large, open and close for a long time. Large gate opening and closing stroke, carried down through the screw.

    4.Not easy to produce water hammer phenomenon. The reason isshut down for a long time.

   5.The medium can flow in any direction to the sides, easy to install.Gate valves on both sides of the channel is symmetric.

Engineering Chain

    6.The length of the structure (Department of housing two is connected with the distance between the end faces of the smaller).

     7.Form a simple structure, short length, good manufacturing process, applicable to a wide range of.

     8.The advantages of compact structure, good rigidity, smooth channel, small flow resistance, the sealing surface of stainless steel and hard alloy, long service life, using PTFE filler. The sealing is reliable, flexible operation of the light.

       Chinabase is able to offer custom, cost-optimized solutions in accordance with customer drawings - such as ready-to-install machine parts and profiles - in addition to our standard products. Our internal Application Technology department and field staff are happy to provide free advice on custom solutions.

      Chinabase Machinery is a group of manufacturing facilities, offering one-stop solution for mechanical power transmission products in China. We can supply a full-range of power transmission products, such as chains,Stainless Steel Chain, Cast Iron Chain,sprockets and plate wheels, pulleys, gearboxes, motors, couplings,V belts, gears and racks. Our product range also covers locking assemblies (clamping elements/locking device), taper bushes, QD bushes, bolt-on hubs, torque limiters, shaft collars, motor bases and motor slides, chain detachers, chain guides, universal joint, rod ends and yokes. Our products are used in many different industry sector, like in automation engineering, drive engineering, conveyor technology, assembly and handling technology, packaging industries, the beverage, food and medical engineering, pharmaceutical production, and laboratory equipment.

Installation issues of the Butterfly valve

       Installation considerations

      Butterfly simple structure, small volume, light weight, its componentsare relatively small, the key of several parts can constitute the butterfly valve, open time is also very convenient, only need toswitch to ninety degrees can be, butterfly valve fluid control is very good, can increase or reduce the traffic flow, the valve has some resistance in the transportation of any fluid, and butterfly valveresistance mainly comes from its own, such as butterfly valvethickness, if you want to reduce the resistance to the fluid onlyneeds to reduce its thickness.

gears and racks

      The elastic seal is restricted by temperature defects.

      Butterfly valve of the application range is wide, if used to control the flow of words you need to select the type and body of different size,because the valve when the design itself is more suitable for somerelatively large diameter of the valve. Butterfly not only widely used in oil, gas, chemical, general industrial water treatment, but also used in thermal power plant cooling water system.

     Chinabase Machinery is a group of manufacturing facilities, offering one-stop solution for mechanical power transmission products in China. We can supply a full-range of power transmission products, such as chains, Transmission Chain，Lifting Chain，sprockets and plate wheels, pulleys, gearboxes, motors, couplings, Tyre Coupling，gears and racks. Our product range also covers locking assemblies (clamping elements/locking device), taper bushes, QD bushes, bolt-on hubs, torque limiters, shaft collars, motor bases and motor slides, chain detachers, chain guides, universal joint, rod ends and yokes. 

    

Butterfly valve of the construction and installation points

      1).Location, height, must meet the design requirements of the import and export orientation, the connection should be firmly.

       2).All kinds of manual valve installed in the pipe insulation, handle are not down.

       3).The valve must be installed prior to visual inspection, the valve plate should be consistent with the provisions of GB 12220 existing national standards, "universal valve logo". The working pressure greater than 1 MPa and in the main pipe on the role played off valve, the installation should be carried out before the performance test the strength and tight, pass behind the prospective use.

Chain guides

      Strength test, the test pressure is 1.5 times the nominal pressure,duration of not less than 5min, the valve housing, packing should be no leakage. Tightness test, the test pressure is 1.1 times thenominal pressure; the test pressure shall comply with the requirements of GB 50243 standard in the test duration, the sealing surface of the valve without leakage.

      A product selection of points

     1.The main control parameters are the size of butterfly valve.

      2.For the single plate type air valve, butterfly valve, and has the advantages of simple structure, convenient processing, low cost,simple operation, but the regulation accuracy is poor, is only suitable for ventilation and air conditioning system for the switch orcoarse adjustment.

      3.Manual, electric or a zipper type operation, can be arbitrarilyfixed angle range of 90 DEG.

      4.Because the single valve plate, Bearing Co., the valve in the high pressure, large flow rate under the condition of short service life.The valve is closed and the ordinary type, heat preservation andinsulation division.

      5.Electric butterfly valve only two position control, electric actuatorwith multi leaf valve.

     Chinabase Machinery is a group of manufacturing facilities, offering one-stop solution for mechanical power transmission products in China. We can supply a full-range of power transmission products, such as chains, sprockets and plate wheels,Transmission Chain, pulleys, gearboxes, motors, couplings,Lifting Chain, gears and racks. Our product range also covers locking assemblies (clamping elements/locking device), taper bushes, QD bushes, bolt-on hubs, torque limiters, shaft collars, motor bases and motor slides, chain detachers, chain guides, universal joint, rod ends and yokes. 

      Chinabase is able to offer custom, cost-optimized solutions in accordance with customer drawings - such as ready-to-install machine parts and profiles - in addition to our standard products. Our internal Application Technology department and field staff are happy to provide free advice on custom solutions.

Valve for the occasion

     Applicable occasions

     Butterfly valves for flow control. Due to the pressure loss of the butterfly valve in the pipe is relatively large, also should consider the robustness when closing plate under medium pressure pipeline.In addition, must also consider the resilient seat material at high temperatures under the operating temperature limit. 

      Butterfly valvelength and overall height of the structure is small, opening and closing speed, and has a good flow control characteristics, the structural principle of the butterfly valve suitable for production of large diameter valves. When asked to use flow control valve as the most important, the choice is the right size and type of valve, so that appropriate, effective work.

     Usually, control and regulate the media in the throttle, mud,requiring a short length of the structure, opening and closing speed(1/4). Low cut-off (pressure difference), the recommended use butterfly.

     The double adjustment, reduced in channel, low noise, there is the phenomenon of cavitation and gasification, a small amount of leakage to the atmosphere, with abrasive media, you can use butterfly.

Special working conditions in the throttle, or require strict sealing, orbadly worn, low-temperature (cryogenic) conditions using butterfly valve, seal with the adjustment three eccentric or special double eccentric butterfly valve device use a specially designed metal.

Cast Iron Chain

      The center line butterfly valve is completely sealed, the gas leakage test of zero, higher life expectancy, working temperature -10degrees to 150 degrees of fresh water, sewage, sea water, salt water, steam, gas, food, pharmaceuticals, oil and various chemical and other pipeline to the requirements.

Bidirectional opening and closing and regulating soft seal butterfly valve for dust removal by ventilation pipe, widely used in metallurgy,light industry, electric power, petrochemical and gas pipeline systems and other waterways.

     Metal double eccentric butterfly valve suitable for city gas supply,heating, water supply, gas, oil, acid and alkali line seal on the metalline, as the adjusting and throttling device.

     Metal to metal seal three eccentric butterfly valve except as a large-scale pressure swing adsorption (PSA) gas separation plant process control valves, also can be widely used in petroleum,petrochemical, chemical, metallurgy, electric power and other fields,when the gate valve, globe valve a good alternative.

    Chinabase Machinery is a group of manufacturing facilities, offering one-stop solution for mechanical power transmission products in China. We can supply a full-range of power transmission products, such as chains,Engineering Chain, Agricultural Chain,sprockets and plate wheels, pulleys, gearboxes, motors, Fluid Couplings, gears and racks. Our product range also covers locking assemblies (clamping elements/locking device), taper bushes, QD bushes, bolt-on hubs, torque limiters, shaft collars, motor bases and motor slides, chain detachers, chain guides, universal joint, rod ends and yokes. Our products are used in many different industry sector, like in automation engineering, drive engineering, conveyor technology, assembly and handling technology, packaging industries, the beverage, food and medical engineering, pharmaceutical production, and laboratory equipment.