技术文章

Dwyer mercoid压力开关的行业应用

2012-08-24 09:27:47 来源：

在输气管道中，压缩气体的需求量是不同的，为此，使用一个Dwyer德威尔Mercoid DA系列死区可调式压力开关来控制压缩机的运行：当压力低时启动压缩机，当达到*大压力限值时关闭压缩机！DA系列压力开关是量程*广的压力开关，可以满足您的任何需求。德威尔Dwyer差压开关/表控制空气系统和气体系统中，使用一个Dwyer德威尔Photohelic差压开关/表，一个或两个德威尔Dwyer差压开关，或者一个W.E.Anderson Duotect压力开关来控制系统中的空气压力.具体配置取决于控制的范围或涉及的压力值.所有这些开关都会监测系统中的压力,并且控制压力源(鼓风机,空气压缩机,气泵)来使系统的压力不超出设定的高压及低压限值.对于低压力的系统(0.01英寸水柱至10磅/平方英寸)的系统,Dwyer德威尔的Photohelic开关/表或德威尔Dwyer压力开关是*佳选择!对高压力系统(5磅/平方英寸至1500磅/平方英寸),我们推荐使用Dwyer德威尔Duotect压力开关.当您在空气系统中安装差压开关时,*好将开关的端口倒置来安装,这样可以防止水气进入隔膜室中,并*好使隔膜室保持垂直,和可能发生的机械振动保持在一个平面中!

压力开关：

Pressure Series Switches	Pressure or Diff. Pressure	Special Features and Approvals	Switch	Min.-Max. Setpoints	Set Point Indicator	On-Off Indicator	Rated Pressure	Max. Surge Pressure
1626 1627 1638 1640 1823 1910 1950 1950P Minitactor H3 BB DP PG DA/DS SA1100 A1 PQ 1000 1000E AP CS 1990 H2	D/P D/P D/P D/P D/P D/P D/P D/P D/P D/P D/P D/P D/P Pressure Pressure Pressure Pressure Pressure Pressure Pressure Pressure Pressure Pressure	Sealing Diaphragm Dual Switches UL, CSA, FM Adjustable Null Zone UL, CSA, FM UL, CSA, FM Explosion-Proof UL, CSA, FM Explosion-Proof UL, CSA, FM Factory Set Explosion-Proof UL, CSA, Cen. Adjustable DB, CSA Adjustable DB, dual bellows UL, CSA, FM Adjustable DB, UL CSA, FM Explosion-Proof, WP,UL,CSA 316 SS Diaphragm, UL Mercury Switch, UL CSA WP, UL Explosion-Proof, WP, UL UL, CSA UL UL, CSA, FM Explosion-Proof, WP, UL, CSA	SPDT 2-SPDT SPDT SPDT, Floating SPDT SPDT SPDT SPDT SPST SPDT, 2- SPDT SPAT SPDT SPDT or SPST SPDT or SPST 1 or 2 SPDT SPDT SPST SPDT SPDT SPDT SPDT SPDT SPDT	.15 to 24" w.c . .15 to 24" w.c. .05 to 12" w.c. .01 to 12" w.c. .07 to 85" w.c. .07 to 20" w.c. .02 to 20" w.c. .05 to 50 psid 2" w.c. to 7 psid 10" w.c. to 7 psid 5 to 8000 psid 0 to 80 psid 1" w.c. to 5 psid -30" Hg to 5000 psig 10 to 500 psig 2 to 500 psig 0 to 30" w.c. 5 to 1400 psig 5 to 1400 psig -10" w.c. to 125 psig -30" Hg to 150 psig 2 to 20" w.c. 3 to 1500 psig	- - Yes Yes - - - - - - - Yes Yes Yes Yes Yes - Yes Yes Yes Yes Yes -	- - - - - - - - - - - - - Yes - - - - - - - Yes -	50" w.c. 50" w.c. 10 psig 10 psig 10 psig 45" w.c. 45" w.c. 35 to 70 psig - 1500 psig 100 to 8000 psig 50 to 600 psig 20 psig 15 to 5000 psig 1200 psig 750 psig - 600 to 3000 psig 600 to 3000 psig 15 to 160 psig 30 to 175 psig 45" w.c. 1500 psig	2 psig 2 psig 25 psig 25 psig 25 psig 10 psig 10 psig 50 to 90 psig - - - - - - 3000 psig - 1 to 60" w.c. - - - - 10 psig -

Dwyer 压力变送器：

Transmitter Series	Pressure or Diff. Pressure	Output	Pressure Indication	Circuit Type(s)	Current	Min.-Max. Ranges	Accuracy	Maximum Pressure
603A 604A 607 616 630A 645 604D 605 620 621 7116 634ES 636 637 638 639 642	D/P D/P D/P D/P D/P D/P D/P D/P D/P D/P Pressure Pressure Pressure Pressure Pressure Pressure Pressure	4-20 mA 4-20 mA 4-20 mA 4-20 mA 4-20 mA 4-20 mA 4-20 mA 4-20 mA 4-20 mA 4-20 mA 4-20 mA 4-20 mA 4-20 mA/1-5 VDC 4-20 mA 4-20 mA 4-20 mA 4-20 mA	- - - - - - Yes Yes Yes Yes Yes - - - - - -	2, 3 or 4-Wire 2, 3 or 4-Wire 2-Wire 2, 3 or 4-Wire 2, 3 or 4-Wire 2-Wire 2, 3 or 4-Wire 2-Wire 2, 3 or 4-Wire 2, 3 or 4-Wire 2, 3 or 4-Wire 2-Wire 2-Wire 2-Wire 2-Wire 2-Wire 2-Wire	AC/DC AC/DC DC AC/DC AC/DC DC AC/DC DC AC/DC AC/DC AC/DC DC DC DC DC DC DC	0-.25" w.c. to 0-20 psid 0-0.1 to 0-120" w.c. 0-0.1 to 0-25" w.c. 0-1" w.c. to 0-100 psid 0-0.5 to 0-300" w.c. 0-1 to 0-100 psid 0-0.5 to 0-1" w.c .05 -0-.20 to 0-50" w.c. 0-3" w.c. to 0-100 psid 0-3" w.c. to 0-100 psid 0-60 to 0-10,000 psig 0-5 to 0-6000 psig 0-15 to 0-300 psog 0-3 to 0-300 psig 0-100 to 0-500 psig 0-1.5 to 0-300 psig 0-15 to 0-100 psig	±2% F.S. ±2% F.S. ±0.5% F.S. ±0.5% F.S. ±3% F.S. ±0.25% F.S. ±2% F.S. ±2% F.S. ±0.5% F.S. ±0.5% F.S. ±2% F.S. ±2% F.S. ±0.3% F.S. ±0.25% F.S. ±0.5% F.S. ±0.08% F.S. ±0.1% F.S.	35 psig 30 psig 10 psig 5-15 psig 500 psig varies 30 psig 25 psig 5-150 psig 5-150 psig 1.5 x range 1.5 x range 3 x range 3 x range 2 x range 3 x range 2 x range