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1、一般资料 General information 1、产品的功能用途和适用范围 Feature and application 自力式压力调节阀(以下简称压力阀)是一种无需外来能源而只依靠调介质自身的压力变化进行自动调节压力的节能型产品具有测量、执行、控制的综合功能。广泛适用于石油、化工、冶金、轻工等工业部门及城市供热、供嗳系统。本产品可用于非腐蚀性(最高温度350)的液体、气体和蒸汽等介质的压力控制装置。 Pressure self-regulating valve （herein after referred to as pressure valve）, a energy saving p
2、roduct, regulates pressure automatically without external energy supply. Pressure valve is used for pressure control device of non-corrosive liquid, gas and steam medium etc. that has integrated function of measure, performance and control. Pressure valve finds us in the field of petroleum, chemical
3、 industry, metallurgy and light industry and city heating system etc. 2、产品的结构及工作原理 Structure and working principle a 产品结构 Structure 本产品为直接作用型自力式压力调节阀由阀体、阀座、阀芯部件、阀盖、顶盘、上、下膜盖、膜片、弹簧、调节螺母等零部件所组成。其具体结构参见图la，图lb、图lc、图ld所示：Pressure valve is of direct action type, which is composed of body, seat, core parts
4、, bonnet, highest quotation, diaphragm, spring, adjusting nut and upper and bottom diaphragm cover etc. The specific structure sees chart 1a, 1b, 1c and 1d. b 工作原理 Working principle (I)作阀后压力调节时的工作原理：(见图la) 工艺介质的阀前压力Pl经过阀芯、阀座的节流后，变为阀后压力P2。P2经过控制管线输入执行器的下膜室作用在顶盘上产生的作用力与弹簧的反作用力相平衡决定了阀芯、阀座的相对位置控制阀后压力。当阀
5、后压力P2增加时P2作用在顶盘上的作用力也随之增加。此时顶盘的作用力大于弹簧的反作用力使阀芯关向阀座的位置直到顶盘的作用力与弹簧反作用力相平衡为止。这时阀芯与阀座之间的流通面积减少流阻变大从而使P2降为设定值。同理，当阀后压力P2降低时作用方向与上述相反这就是阀后压力调节时的工作原理。当需要改变阀后压力P2的设定值时可调整调节螺母8。（1） The working principle of regulating the back of valves pressure :（see chart 1a）After being throttled by core and seat, P1 become
6、s P2.（P1 stands for the front of valves pressure and P2 stands for the back of valves pressure.）Getting through bottom diaphragm room, P2 acts on the highest quotation and creates acting force. The acting force keeps its balance with reacting force of spring, which decides the relative place of core
7、 and seat and controls the back of valves pressure. When P2 increases, the acting force is also increasing. Here, the acting force is bigger than the reacting force, which made the core close to the seat until balance. And the circulation area between core and seat decreases and flow resistance incr
8、eases, thereby P2 fell to the setting value. Also, when P2 decreases, the acting force direction is contrary. When P2 s setting value needs to be changed, you can regulate the adjusting nut 8. 阀体 body阀座 seat阀芯 valve core阀盖 bonnet膜盖 diaphragm cover膜片diaphragm有效弹簧effective spring调节螺母adjusting nut阀体 bo
9、dy阀座seat阀芯valve core阀盖bonnet膜盖 diaphragm cover膜片diaphragm 有效弹簧effective spring调节螺母adjusting nut图la ZZYP-16B阀后压力调节阀 图lb ZZYP-16K阀前压力调节阀Chart 1a ZZYP-16B type valves back pressure Chart 1b ZZYP-16K type valves front pressure 阀体 body阀座seat阀芯valve core阀盖bonnet膜盖 diaphragm cover膜片diaphragm 有效弹簧effective
10、spring调节螺母adjusting nutregulating valve regulating valve阀体 body阀座seat阀芯valve core阀盖bonnet膜盖 diaphragm cover膜片diaphragm有效弹簧effective spring调节螺母adjusting nut图lc ZZYP-16B压差压力调节阀 图ld ZZYP-16K压差压力调节阀Chart 1c ZZYP-16B type pressure difference Chart 1d ZZYP-16K type pressure difference control regulating v
11、alve control regulating valve图le ZZYP DN150-250 图lf ZZYP DN150-250（带加长件）Chart 1e ZZYP DN150-250 Chart 1f ZZYP DN150-250（with lengthen part）（差压上升、阀关闭） （差压上升、阀开启）（Valve closes as the pressure difference ascends）（Valve opens as the pressure difference ascends） (2)作阀前压力调节时的工作原理：(见图lb) 工艺介质的阀前压力Pl通过阀芯、阀座
12、节流后变为阀后压力P2同时Pl通过控制管线输入执行器的上膜室内作用在顶盘上产生的作用力与弹簧的反作用力相平衡决定了阀芯、阀座的相对位置控制阀前压力。当阀前压力Pl增加时Pl作用在顶盘上的作用力也随之增加。此时顶盘上的作用力大于弹簧的反作用力使阀芯向离开阀座方向移动直到顶盘的作用与弹簧反作力相平衡为止。这时阀芯与阀座之间流通面积变大流阻变小从而使PI降为设定值。同理当阀前压力PI降低时作用方向与上述相反。这就是阀前压力调节时的工作原理。当需要改变阀前压力PI的设定值时可调整调节螺母8。（2） The working principle of regulating the front of val
13、ves pressure:（see chart 1b）After being throttled by the core and seat, P1 becomes P2,（P1 stands for the front of valves pressure and P2 stands for the back of valves pressure.）Meanwhile, getting through bottom diaphragm room , P1 acts on highest quotation and creates acting force. The acting force k
14、eeps its balance of the core and seat and controls the front of valves pressure. When P1 increases, the acting force is also increasing. At this time, the acting force is bigger than the reacting force, which made the core leave the seat until balance. Here, the circulation area between the core and seat increases and flow resistance decreases, thereby, P1 fell to the setting value. Also, when P1 decreases, the acting direction is contrary. When P1s setting value needs to be changed, you c
