典型应用
WatsonMcdaniel公司出品的D系列和HD系列先导式调节阀适用于蒸汽系统中对压力和温度精确控制的场合。D系列调节阀材质是铸铁;HD系列调节阀材质是压力与温度等级更高的球墨铸铁。该系列调节阀可配用多种不同用途的先导阀,有压力先导式,温度先导式以及压力温度组合先导式。每一种先导阀均可通过先导阀适配器进行组合与拆卸。这种模块设计使得系列产品用途十分广泛。该系列减压阀提供了覆盖整个压力范围的弹簧等级,并用颜色加以区别。Z常选用的先导阀有P型压力先导阀和T型温度先导阀。
压力先导阀
使用压力先导阀时,你可以有几种选择形式。P型及P5型压力先导阀均为弹簧调节式压力先导阀。P型先导阀用于普通压力调节的场合。P5型先导阀则用于要求调节压力精确的场合。P5型的调节精度可维持在±1psi的范围内。A型空气先导阀是通过压缩空气进行压力调节,减压一般用于减压阀及减压站的遥控调节。
温度先导阀
T型温度先导阀适用于对温度的调节。先导阀测温头内填充了温度敏感液体,受热膨胀。液体的膨胀反馈到波纹管进行温度先导调节。T型温度先导阀安装了一个耐过热波纹管,以保护可能处于过热工况下的先导阀。T型温度先导阀的温控范围为60~260oF。调节阀的开关控制可使用S型电磁开关先导阀。S型先导阀是通过电源来控制调节阀的关闭与开启。它一般与P型先导阀或T型先导阀组合使用。
PT型先导阀组是用于系统要求一个调节阀既要控制压力又要控制温度的场合。当调节阀安装PT型先导阀后。下游压力受P型压力先导阀的Zda压力设定值限定,而T型温度先导阀保证其准确的使用温度。
背压先导阀
当需要控制系统的背压时,可在HD系列调节阀上配装BP型背压先导阀,这种先导阀控制调节阀上游的压力。
先导阀的组合
先导阀的一大优势在于可以在调节阀上安装不同类型的先导阀及其组合。以上三种先导阀可以组合在一起进行调节阀的控制。Z常用的先导阀组合是温度-压力先导阀,若另外再加装S型电磁先导阀,可直接对系统进行开关控制。
比例溢流阀
AGMZO-TERS-PS-010/315;
AGMZO-TERS-PS-010/315/Y;
RZM0-TERS-PS-010/315;
RZM0-TERS-PS-010/21050;
通径换向阀
DKE-1711/2-24DC;
DHI-0631/2-24DC;
DKE-1631/2-24DC;
DKE-171/1/2/A-24DC;
DHI-071/1/2/A-24DC;
DHI-0718-24DC;
6通径电磁球阀
DLOH-3C-U24DC;
DLOK-3C-O24DC;
比例压力插装阀
LIMZO-TERS-5/315;
比例流量插装阀
LIQZ0-TE-50ZL4/I;
LIQZO-TE-40ZL4/Q
直动式减压阀
RZGA-A-010/210/M;
RZGA-A-010/32/M/7;
RZGA-A-033/80/M/7;
RZGO-A-010/100;
RZGO-A-010/210;
RZGO-A-033/100;
RZGO-A-033/210;
RZGO-A-033/315;
RZGO-AE-010/100;
RZGO-AE-033/210;
RZGO-TER-010/100;
RZGO-TER-010/100/I;
RZGO-TER-010/210;
RZGO-TER-010/210/I;
RZGO-TER-010/32;
RZGO-TER-033/100;
RZGO-TER-033/315;
先导式减压阀
AGRCZO-A-10/100/P;
AGRCZO-A-10/210;
AGRCZO-A-10/210/P;
AGRCZO-A-10/315;
AGRCZO-A-10/315;
AGRCZO-A-20/210/R;
AGRCZO-AE-10/210;
AGRCZO-AE-10/50;
AGRCZO-AE-20/210/P;
AGRCZO-TER-10/315;
AGRZO-A-10/100/P;
AGRZO-A-10/210/P;
AGRZO-A-10/210/R;
AGRZO-A-10/315;
AGRZO-A-20/210/18;
先导式减压阀
KZGO-A-031/210;
KZGO-A-031/315;
HZGO-A-031/100;
HZGO-A-031/210;
HZGO-A-031/315;
HZGO-A-031/315/18;
HZMO-A-030/210;
DHI-0610/A-X230/50/60AC,
DHI-0610/A-X24DC,
DHI-0610-X110/50/60AC,
DHI-0610-X230/50/60AC,
DHI-0610-X24DC,
DHI-0611/A-X24DC,
DHI-0611/FC-X24DC,
DHI-06119/A-X24DC,
DHI-0611-X24DC,
DHI-0612/A-X24DC,
DHI-0613/A-X24DC,
DHI-0613/WP-X230AC,
DHI-0613-X230/50/60AC,
DHI-0613-X24DC,
DHI-0614-X24DC,
DHI-0616/A-X230/50/60AC
,DHI-0618/A-X24DC,
DHI-0630/2/A-X230/50/60AC,
DHI-0632/2/A-X230/50/60AC,
DHI-0632/2/A-X24DC,
DHI-0632/2-X230/50/60AC,
DHI-0632/2-X24DC,
DHI-0639/C-X24DC,
DHI-0670-X24DC,DHI-
直动式溢流阀
RZMA-A-010/250/M;
RZMA-A-030/180/M/7;
RZMO-A-010/100;
RZMO-A-010/210;
RZMO-A-010/315;
RZMO-A-010/315/18;
RZMO-A-010/50;
RZMO-A-010/50/18;
RZMO-A-030/100;
RZMO-A-030/210;
RZMO-A-030/210/18;
RZMO-A-030/315;
RZMO-AE-010/315;
RZMO-AE-030/100;
RZMO-P1-010/100/18/MC;
RZMO-P1-010/210;
RZMO-P3-010/100/AM1NSA;
RZMO-P3-010/100/I/AM1NSA;
RZMO-P3-010/210/I;
RZMO-P3-010/210/I;
RZMO-TER-010/100;
RZMO-TER-010/315;
RZMO-TER-010/315/I;
RZMO-TER-030/210;
RZMO-TER-030/315/I
先导式溢流阀
AGMZA-A-10/250/M;
AGMZA-A-10/250/PA-M;
AGMZA-A-10/80/PA-GK;
AGMZA-A-10/80/PA-GK/24;
AGMZA-A-20/250/M;
AGMZO-A-10/100;
AGMZO-A-10/100/Y;
AGMZO-A-10/210;
AGMZO-A-10/210/18;
AGMZO-A-10/210/E;
AGMZO-A-10/210/Y;
AGMZO-A-10/315;
AGMZO-A-10/315/E;
AGMZO-A-10/315/Y;
AGMZO-A-20/210;
AGMZO-A-20/315;
AGMZO-A-20/315/Y;
AGMZO-A-32/315;
AGMZO-AE-10/210;
AGMZO-AE-10/31510;
AGMZO-AE-20/315/Y;
AGMZO-AE-32/315;
AGMZO-TER-010/210/I;
AGMZO-TER-10/100/I;
AGMZO-TER-10/210;
AGMZO-TER-10/315/Y;
AGMZO-TER-20/210;
AGMZO-TER-20/315/Y
AGMZO-TER-10/210/EI;
AGMZO-TER-10/210/I;
AGMZO-TER-10/315;
AGMZO-TER-10/315/I;
比例换向阀
DHZA-A-051-S3/M/7;
DHZA-A-051-S3/PA-GK/7;
DHZA-A-051-S5/M/7;
DHZA-A-071-L5/M/7;
DHZO-A-051-S5;
DHZO-A-051-S5/18;
DHZO-A-053-L3;
DHZO-A-073-D5/18;
DHZO-A-073-L5;
DHZO-A-073-S3;
DHZO-A-073-S5;
DHZO-AE-051-S5;
DHZO-AE-071-D5/I;
DHZO-AE-071-S5/I;
DHZO-AE-073-D5/I;
DHZO-AE-073-S5;
DHZO-AE-073-S5/I;
DHZO-AT-073-P3;
DHZO-ATE-073-P3/B/DP27SB;
DHZO-T-051-L1;
DHZO-T-051-L5;
DHZO-T-071-D5;
DHZO-T-071-L5;
DHZO-T-071-S5;
DHZO-TE-051-L5/Y;
DHZO-TE-071-L5;
DHZO-TE-071-S5;
DHZO-TE-073-S5;
DKZA-A-173-L5/PA-M/7;
DKZO-A-151-S5;
DKZOR-AE-171-S5;
DKZOR-AE-171-S510/WG;
DKZOR-AE-171-S5/Y;
DKZOR-AE-173-D5;
DKZOR-AE-173-L5;
DKZORC-A-151-S5/18;
DKZOR-T-151-L5;
DKZOR-T-151-L5/Y;
DKZOR-T-153-L5;
DKZOR-T-171-D5;
DKZOR-T-171-L5;
DKZOR-T-171-S5;
DKZOR-T-171-S5/Y;
DKZOR-T-173-L5;
DKZOR-TE-170-L5;
DKZOR-TE-171-L5;
DKZOR-TE-171-L5/I;
DKZOR-TE-171-S5;
DKZOR-TE-171-S5/Y;
DKZOR-TE-173-L5;
DKZO-T-171-S3;
DKZO-T-173-S5;
DKZOR-TES-151-S5/B;
伺服比例阀
DLHZA-T-040-L71/M/7;
DLHZA-T-040-T71/GK;
DLHZA-T-060-T71/GK;
DLHZO-LE-060-V71/LQ52SA;
DLHZO-LE-060-V71/Q/LQ42SB;
DLHZO-LE-060-V71/Q/LQ52SA;
DLHZO-T-040-L11;
DLHZO-T-040-L13;
DLHZO-T-040-L31;
DLHZO-T-040-L51;
DLHZO-T-040-L53;
DLHZO-T-040-L71;
DLHZO-T-040-L73;
DLKZA-T-160-T71/GK;
DLKZOR-LE-160-L71/Q/LQ82SB;
DLKZOR-T-140-L31;
DLKZOR-T-140-L71;
DLKZOR-T-140-L73;
DLKZOR-T-140-T71;
DLKZOR-T-140-V71;
DLKZOR-T-160-L71;
DLKZOR-TE-140-L31;
DLKZOR-TE-140-L71;
DLKZOR-TE-140-L71/FI;
DLKZOR-TE-140-L71/I;
DLKZOR-TE-140-L71/Q;
DLKZOR-TE-140-L73/I;
DLKZOR-TE-140-T73;
DLKZOR-TE-140-T73/I;
DPZO-A-171-L5;
DPZO-A-171-L5/D;
DPZO-A-171-L5/E;
DPZO-A-171-S5;
DPZO-A-251-L5;
DPZO-A-251-S5;
DPZO-A-253-S5;
DPZO-A-271-D5;
DPZO-A-271-L5;
DPZO-A-271-L5/D;
DPZO-A-271-L5/E;
DPZO-A-271-L5/G;
DPZO-A-271-S5;
DPZO-A-271-S5/D5;
DPZO-A-271-S5/DE;
DPZO-A-271-S5/DG;
DPZO-A-271-S5/E
;DPZO-A-271-S5/G;
DPZO-A-273-D5;
DPZO-A-273-D5/G;
DPZO-A-273-L5;
DPZO-A-273-L5/D;
DPZO-A-273-L5/D;
DPZO-A-273-L5/DG;
DPZO-A-273-L5/E;
DPZO-A-273-L5/G;
DPZO-A-273-S3;
DPZO-A-273-S3/DG;
DPZO-A-273-S5;
DPZO-A-273-S5/D;
DPZO-A-273-S5/DG;
DPZO-A-273-S5/G;
DPZO-A-371-L5/D;
DPZO-A-371-L5/DEG/18;
DPZO-A-371-L5/E;
DPZO-A-371-S5
;DPZO-A-371-S5/D;
DPZO-A-371-S5/EG;
DPZO-A-373-D5;
DPZO-A-373-D5/D;
DPZO-A-373-D5/DEG;
DPZO-A-373-L5/DG
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