Electric control valve is based on the power the power, accept the unified standard electrical signal 0 to 10 ma (or 4-20 ma), servo amplifier amplification process, make the motor drive reducer running and produce axial thrust, thus regulating valve core shift accordingly reach the process flow, pressure, temperature, liquid level variables such as adjusting the intelligent control of the valve.

Electric control valve consists of two parts, electric actuator and control valve, can be divided into direct single seat type and direct two-seater type two kinds, the latter has a large flow capacity, small unbalanced force and the characteristics of stable operation, so often especially suitable for large flow, little pressure drop and leakage.

Electric flow characteristic of regulating valve is the valve pressure difference on both ends under the condition of constant, the medium flows through the regulator of the relationship between relative flow and its opening. Electric regulating valve the flow characteristic of linear features, such as percentage and parabolic characteristics of three.

The meaning of the three kinds of flow characteristic is as follows: (1) percentage percentage (log), and other characteristics such as the relative stroke and no linear relationship between relative flow in the process of every point unit running changes caused by the flow of change is proportional to the flow of this point, the percentage of the flow rate change is equal. So it has the advantage of traffic hours, changing flow is small, large flow, the flow rate change is big, is also on the different opening, has the same accuracy.

(2) linear (linear) linear characteristic features relatively stroke and a linear relationship with relative flow rate. Unit trip caused by the changes in the flow rate change is constant. Large flow, the flow relative changes little, traffic hours, flow relative change is big.

(3) a parabolic flow according to the itinerary features two proportional to change, with linear and roughly equal percentage in the middle of the properties.

Can be seen from the analysis of the above three kinds of characteristic, its regulation performance, is the optimal with characteristics such as percentage, its regulation stability, good regulation performance. And parabolic characteristics than the linear characteristic of regulating performance is good, can according to the requirement of the application, choose any of them a flow characteristic. Beijing letter meidi valve regulating valve series products: pneumatic control valve, pneumatic diaphragm single-seat regulating valve ZMZP, ZMAP, ZMBP, pneumatic membrane two-seater regulator ZMAN, ZMBN. 气动精小型薄膜调节阀ZJHP，气动精小型薄膜套筒调节阀ZJHM、气动三通分流调节阀ZAZQ、ZMAQ、气动三通合流调节阀ZAZX、ZMAX、气动轻小型调节阀ZXMAP，ZXMAN，ZXMAM型、气动高压角式调节阀ZMAS、ZMBS、气动调节切断，O型球阀ZSHO型、气动活塞式调节切断蝶阀ZSCW、气动V型对夹球阀ZSHV、气动活塞式快速切断阀ZSPQ、气动薄膜活塞式切断阀ZMQ、ZSQ、气动衬氟调节阀ZMPF、CV3000系列调节阀HLS、HTS、HCB、HPS、HPC、HAA、HAC、HCP、HPN电动调节阀:电动单座调节阀ZAZP、电动双座调节阀ZAZN、电动套筒调节阀ZAZM、智能调节球阀ZRQO、电子式电动调节阀ZDLP、ZDLM、电子式电动双座调节阀ZDLN、电子式电动三通合流调节阀ZDLQ、ZDLX、电动三通分流调节阀ZAZQ、电动三通合流调节阀ZAZX、电动V型调节阀ZKJV、电子式V型调节阀ZDJV、电动精小型单座调节阀ZAJP、电动精小型套筒调节阀ZAJM、精小型电子式调节阀ZDHP、ZDHM、电动调节蝶阀ZAJM自力式调节阀:自力式压力调节阀ZZYP、ZZV、ZZVP、自力式温度调节阀ZZWP、ZZWEP。 The valve body material: cast steel, stainless steel, chrome molybdenum steel. 1.6 32 mpa working pressure, working temperature and 40 ℃ to 600 ℃. The valve diameter DN15 - DN200. Connection mode: flange. Manufacturing standards: gb. American VTON granville shield to the principle of self-reliance type regulator function description: self-reliance type regulator on within the medium flows through the valves own pressure, temperature, as energy drive valve work automatically, do not need the power converter and secondary instrument. The self-help type regulator use valve the output feedback signal (pressure, differential pressure, temperature) through the signal tube to the actuator driven disc change of valve opening, to achieve the purpose of regulating pressure, flow, temperature. Regulator is divided into direct effect and indirect effect.

Direct effect on type regulator is also known as the spring load type, the structure with elastic elements such as spring, bellows, bellows type of bulb, etc., the principle of balance with the elastic force feedback signal. Indirect effect on regulating valve, added a command unit (pilot valve) which play a role of feedback signal amplification and then through the actuator, drive the main valve disc movement to achieve the purpose of the change of valve opening. If be self-reliance type pressure regulator, feedback signal is the valve outlet pressure, by introducing actuator signal pipe. If traffic is self-reliance type control valve, the valve outlet is a orifice resistance device (or other) out ends by orifice differential pressure signal is introduced into actuators. If the temperature self-reliance type valve, valve of the export is the temperature sensor package (or temperature) through the temperature sensor in medium heat bilges cold shrink drive actuators. Beijing letter meidi valve regulating valve series products: pneumatic control valve, pneumatic diaphragm single-seat regulating valve ZMZP, ZMAP, ZMBP, pneumatic membrane two-seater regulator ZMAN, ZMBN. 气动精小型薄膜调节阀ZJHP，气动精小型薄膜套筒调节阀ZJHM、气动三通分流调节阀ZAZQ、ZMAQ、气动三通合流调节阀ZAZX、ZMAX、气动轻小型调节阀ZXMAP，ZXMAN，ZXMAM型、气动高压角式调节阀ZMAS、ZMBS、气动调节切断，O型球阀ZSHO型、气动活塞式调节切断蝶阀ZSCW、气动V型对夹球阀ZSHV、气动活塞式快速切断阀ZSPQ、气动薄膜活塞式切断阀ZMQ、ZSQ、气动衬氟调节阀ZMPF、CV3000系列调节阀HLS、HTS、HCB、HPS、HPC、HAA、HAC、HCP、HPN电动调节阀:电动单座调节阀ZAZP、电动双座调节阀ZAZN、电动套筒调节阀ZAZM、智能调节球阀ZRQO、电子式电动调节阀ZDLP、ZDLM、电子式电动双座调节阀ZDLN、电子式电动三通合流调节阀ZDLQ、ZDLX、电动三通分流调节阀ZAZQ、电动三通合流调节阀ZAZX、电动V型调节阀ZKJV、电子式V型调节阀ZDJV、电动精小型单座调节阀ZAJP、电动精小型套筒调节阀ZAJM、精小型电子式调节阀ZDHP、ZDHM、电动调节蝶阀ZAJM自力式调节阀:自力式压力调节阀ZZYP、ZZV、ZZVP、自力式温度调节阀ZZWP、ZZWEP。 The valve body material: cast steel, stainless steel, chrome molybdenum steel. 1.6 32 mpa working pressure, working temperature and 40 ℃ to 600 ℃. The valve diameter DN15 - DN200.

Connection mode: flange.

Manufacturing standards: gb.

VTON granville shield to the principle of pneumatic control valve to the pneumatic control valve is pneumatic execution units in the unit combination instrument, it is safe to automatic control system is an important part of production process. It with compressed air as power source, to accept a unified standard signal 0 to 10 ma (or 4-20 ma), change the valve opening, implement control pipe parameters such as fluid flow, pressure, temperature, liquid level. Beijing letter meidi valve regulating valve series products: pneumatic control valve, pneumatic diaphragm single-seat regulating valve ZMZP, ZMAP, ZMBP, pneumatic membrane two-seater regulator ZMAN, ZMBN. 气动精小型薄膜调节阀ZJHP，气动精小型薄膜套筒调节阀ZJHM、气动三通分流调节阀ZAZQ、ZMAQ、气动三通合流调节阀ZAZX、ZMAX、气动轻小型调节阀ZXMAP，ZXMAN，ZXMAM型、气动高压角式调节阀ZMAS、ZMBS、气动调节切断，O型球阀ZSHO型、气动活塞式调节切断蝶阀ZSCW、气动V型对夹球阀ZSHV、气动活塞式快速切断阀ZSPQ、气动薄膜活塞式切断阀ZMQ、ZSQ、气动衬氟调节阀ZMPF、CV3000系列调节阀HLS、HTS、HCB、HPS、HPC、HAA、HAC、HCP、HPN电动调节阀:电动单座调节阀ZAZP、电动双座调节阀ZAZN、电动套筒调节阀ZAZM、智能调节球阀ZRQO、电子式电动调节阀ZDLP、ZDLM、电子式电动双座调节阀ZDLN、电子式电动三通合流调节阀ZDLQ、ZDLX、电动三通分流调节阀ZAZQ、电动三通合流调节阀ZAZX、电动V型调节阀ZKJV、电子式V型调节阀ZDJV、电动精小型单座调节阀ZAJP、电动精小型套筒调节阀ZAJM、精小型电子式调节阀ZDHP、ZDHM、电动调节蝶阀ZAJM自力式调节阀:自力式压力调节阀ZZYP、ZZV、ZZVP、自力式温度调节阀ZZWP、ZZWEP。 The valve body material: cast steel, stainless steel, chrome molybdenum steel. 1.6 32 mpa working pressure, working temperature and 40 ℃ to 600 ℃. The valve diameter DN15 - DN200.

Connection mode: flange.

Manufacturing standards: gb.