Trommel Screen Rotary Drum Sieve for Sand and Gravel Separation is sieving cylinder, which is composed of several circular screen, the whole body is slant on theground. External is sealed by the cowling in order to avoid dust. Through rolling, the materials are separated from top to bottom,and the fine material is discharged from the front and the block is discharged from bottom. Rotary Trommel Screen,Rotary Drum Screen,Rotary Screen Machine,Mining Rotary Drum Trommel Screen henan ascend machinery , https://www.ascendminingcrusher.com
Dielectric Characteristics 1 Solenoid valves of different types are used for gas, liquid or mixed state. For example, ZQDF is used for air, ZQDF-Y is used for liquid and ZQDF-2 (or -3) is used for steam. Otherwise, it may cause malfunction. ZDF series of multi-function solenoid valve is available in the gas. Liquid. The best time to state the media state, the installation users do not have to adjust. 2 different temperature medium products, or the coil will burn, aging seals, seriously affect the life of the life. 3 Medium viscosity, usually below 50cSt. If more than this value, diameter greater than 15mm with ZDF series of multi-function solenoid valve for special order. Path less than 15mm set high viscosity solenoid valve. 4 medium cleanliness is not high should be equipped with a recoil filter valve in front of the solenoid valve, low pressure fashion can choose direct acting diaphragm solenoid valve such as CD-P. 5 If the medium is directional flow, and do not allow reverse flow ZDF-N and ZQDF-N single flow in both directions, please make special requirements. 6 medium temperature should be selected within the allowable range of the solenoid valve. Pipeline parameters 1 According to the media flow requirements and pipeline connection options valve port and model. For example, the small diameter selection CA5 and Z3F for one pipe to two pipes, ZDF-Z1 / 2 for medium or large diameters. Another example is the control of the convergence of two pipelines, please choose ZDF-Z2 / 1. 2 According to the flow rate and the valve Kv value selected nominal diameter, but also optional with the pipe diameter. Please note that some manufacturers are not marked with Kv value, often the size of the valve hole is smaller than the interface diameter, must not be greedy price low and misleading. 3 minimum working pressure differential Working pressure above 0,04Mpa optional indirect pilot; minimum working pressure close to zero or less must be used direct or step-by-step direct type. Environmental conditions 1 The maximum and minimum temperature of the environment should be selected within the allowable range, if there is any need for special order made over. 2 Relative humidity in the environment is high and there is a drop of rain and other occasions should be selected waterproof solenoid valve 3 environment often vibrate, bumps and shocks and other occasions should choose special varieties, such as marine electromagnetic valve. 4 Use in corrosive or explosive environments should be given priority according to safety requirements Erosion resistance 5 If the space is limited, please use the multi-function solenoid valve, because it eliminates the need for bypass and three manual valves and easy on-line maintenance .