网上十大正规赌网址入口|中国有限公司

不锈钢减(jian)压(ya)(ya)阀(fa)(fa)(fa)是(shi)它是(shi)采用(yong)(yong)控制(zhi)阀(fa)(fa)(fa)体内的(de)启(qi)闭件(jian)(jian)的(de)开度(du)(du)(du)来调(diao)节(jie)(jie)介质的(de)流量，将(jiang)介质的(de)压(ya)(ya)力降低，同(tong)时(shi)借助(zhu)阀(fa)(fa)(fa)后压(ya)(ya)力的(de)作(zuo)用(yong)(yong)调(diao)节(jie)(jie)启(qi)闭件(jian)(jian)的(de)开度(du)(du)(du)，使(shi)阀(fa)(fa)(fa)后压(ya)(ya)力保(bao)持在(zai)(zai)一定(ding)范(fan)围内，并在(zai)(zai)阀(fa)(fa)(fa)体内或阀(fa)(fa)(fa)后喷(pen)入冷却(que)水，将(jiang)介质的(de)温(wen)(wen)度(du)(du)(du)降低，这种阀(fa)(fa)(fa)门称为减(jian)压(ya)(ya)减(jian)温(wen)(wen)阀(fa)(fa)(fa)。该阀(fa)(fa)(fa)的(de)特点，是(shi)在(zai)(zai)进口压(ya)(ya)力不断变化的(de)情况下，保(bao)持出(chu)口听压(ya)(ya)力和温(wen)(wen)度(du)(du)(du)值在(zai)(zai)一定(ding)的(de)范(fan)围内。减(jian)压(ya)(ya)阀(fa)(fa)(fa)是(shi)气(qi)动调(diao)节(jie)(jie)阀(fa)(fa)(fa)的(de)一个必备配件(jian)(jian)，主(zhu)要作(zuo)用(yong)(yong)是(shi)将(jiang)气(qi)源的(de)压(ya)(ya)力减(jian)压(ya)(ya)并稳定(ding)到(dao)一个定(ding)值，以便于调(diao)节(jie)(jie)阀(fa)(fa)(fa)能够获得稳定(ding)的(de)气(qi)源动力用(yong)(yong)于调(diao)节(jie)(jie)控制(zhi)。本(ben)类阀(fa)(fa)(fa)门在(zai)(zai)管道(dao)中(zhong)一般应当水平安装(zhuang)。

当不锈钢减压阀的输(shu)出(chu)(chu)压(ya)(ya)力(li)较(jiao)高或通(tong)径较(jiao)大时(shi)，用(yong)调压(ya)(ya)弹簧直(zhi)(zhi)接调压(ya)(ya)，则弹簧刚(gang)度必然过大，流量变化时(shi)，输(shu)出(chu)(chu)压(ya)(ya)力(li)波动(dong)较(jiao)大，阀(fa)(fa)(fa)(fa)的结构尺寸也将增(zeng)大。为(wei)了(le)克服这些缺点，可采用(yong)先(xian)(xian)导(dao)式(shi)(shi)减(jian)(jian)压(ya)(ya)阀(fa)(fa)(fa)(fa)。先(xian)(xian)导(dao)式(shi)(shi)减(jian)(jian)压(ya)(ya)阀(fa)(fa)(fa)(fa)的工作(zuo)原理与直(zhi)(zhi)动(dong)式(shi)(shi)的基本相(xiang)同(tong)。先(xian)(xian)导(dao)式(shi)(shi)减(jian)(jian)压(ya)(ya)阀(fa)(fa)(fa)(fa)所用(yong)的调压(ya)(ya)气体，是(shi)由小(xiao)(xiao)型的直(zhi)(zhi)动(dong)式(shi)(shi)减(jian)(jian)压(ya)(ya)阀(fa)(fa)(fa)(fa)供给的。若把小(xiao)(xiao)型直(zhi)(zhi)动(dong)式(shi)(shi)减(jian)(jian)压(ya)(ya)阀(fa)(fa)(fa)(fa)装(zhuang)在阀(fa)(fa)(fa)(fa)体内部(bu)，则称为(wei)内部(bu)先(xian)(xian)导(dao)式(shi)(shi)减(jian)(jian)压(ya)(ya)阀(fa)(fa)(fa)(fa)；若将小(xiao)(xiao)型直(zhi)(zhi)动(dong)式(shi)(shi)减(jian)(jian)压(ya)(ya)阀(fa)(fa)(fa)(fa)装(zhuang)在主阀(fa)(fa)(fa)(fa)体外部(bu)，则称为(wei)外部(bu)先(xian)(xian)导(dao)式(shi)(shi)减(jian)(jian)压(ya)(ya)阀(fa)(fa)(fa)(fa)。

(1) 调(diao)(diao)(diao)压(ya)范围(wei)：它是指减压(ya)阀输出(chu)压(ya)力P2的可调(diao)(diao)(diao)范围(wei)，在此范围(wei)内要(yao)求达到规定的精度。调(diao)(diao)(diao)压(ya)范围(wei)主要(yao)与调(diao)(diao)(diao)压(ya)弹簧的刚度有关(guan)。

(2) 压(ya)(ya)(ya)力特性：它是(shi)指流量g为定值时，因(yin)输(shu)(shu)入(ru)压(ya)(ya)(ya)力波动(dong)而(er)引起输(shu)(shu)出(chu)压(ya)(ya)(ya)力波动(dong)的特性。输(shu)(shu)出(chu)压(ya)(ya)(ya)力波动(dong)越(yue)小，减压(ya)(ya)(ya)阀的特性越(yue)好。输(shu)(shu)出(chu)压(ya)(ya)(ya)力必(bi)须低(di)于(yu)输(shu)(shu)入(ru)压(ya)(ya)(ya)力—定值才(cai)基本上不随输(shu)(shu)入(ru)压(ya)(ya)(ya)力变(bian)化而(er)变(bian)化。

(3) 流(liu)量(liang)(liang)特性：它是指(zhi)输(shu)(shu)入(ru)压(ya)(ya)力—定(ding)时，输(shu)(shu)出(chu)压(ya)(ya)力随(sui)输(shu)(shu)出(chu)流(liu)量(liang)(liang)g的变化而变化的持性。当流(liu)量(liang)(liang)g发生变化时，输(shu)(shu)出(chu)压(ya)(ya)力的变化越小(xiao)越好。一般(ban)输(shu)(shu)出(chu)压(ya)(ya)力越低，它随(sui)输(shu)(shu)出(chu)流(liu)量(liang)(liang)的变化波动就越小(xiao)。