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原裝美國(guó)紐曼帝克氣動(dòng)閥

美國(guó)ASCO防爆電磁閥在選型時(shí)的注意事項(xiàng)一、適用性
美國(guó)ASCO防爆電磁閥的選型依據(jù)電磁閥選型首先應(yīng)該依次遵循安全性，可靠性，適用性，經(jīng)濟(jì)性四大原則，其次是根據(jù)六個(gè)方面的現(xiàn)場(chǎng)工況（即管道參數(shù)、流體參數(shù)、壓力參數(shù)、電氣參數(shù)、動(dòng)作方式、特殊要求進(jìn)行選擇）。
美國(guó)ASCO防爆電磁閥管路中的流體必須和選用的電磁閥系列型號(hào)中標(biāo)定的介質(zhì)*。流體的溫度必須小于選用電磁閥的標(biāo)定溫度。電磁閥允許液體粘度一般在20CST以下，大于20CST應(yīng)注明。工作壓差，管路zui高壓差在小于0.04MPa時(shí)應(yīng)選用寧波艾爾派克公司如ZS,2W,ZQDF,ZCM系列等直動(dòng)式和分步直動(dòng)式；zui低工作壓差大于0.04MPa時(shí)可選用先導(dǎo)式（壓差式）電磁閥；zui高工作壓差應(yīng)小于電磁閥的zui大標(biāo)定壓力；一般電磁閥都是單向工作，因此要注意是否有反壓差，如有安裝止回閥。流體清潔度不高時(shí)應(yīng)在電磁閥前安裝過(guò)濾器，一般電磁閥對(duì)介質(zhì)要求清潔度要好。注意流量孔徑和接管口徑；電磁閥一般只有開(kāi)關(guān)兩位控制；條件允許請(qǐng)安裝旁路管，便于維修；有水錘現(xiàn)象時(shí)要定制電磁閥的開(kāi)閉時(shí)間調(diào)節(jié)。注意環(huán)境溫度對(duì)電磁閥的影響電源電流和消耗功率應(yīng)根據(jù)輸出容量選取，電源電壓一般允許±10%左右，必須注意交流起動(dòng)時(shí)VA值較高。
原裝美國(guó)紐曼帝克氣動(dòng)閥

	Description	Media	Pipe Size	Function	Series
	Pneumatic Valve - Numatics Series ISO 15407-2 (18mm)	Air, Inert Gas;Vacuum	1/8;1/4;6 mm;8 mm	4 way - 5/2;4 way - 5/3;4 way - 5/3 - Closed Center;4 way - 5/3 - Open Center;4 way - 5/3 - Pressure Center;Dual 3 - Way 2 X Normally Closed;Dual 3 - Way 2 X Normally Open	iso-15407-2-18
	Pneumatic Valve - Numatics Series ISO 15407-2 (26mm)	Air, Inert Gas;Vacuum	1/4;3/8;8 mm;10 mm	4 way - 5/2;4 way - 5/3;4 way - 5/3 - Closed Center;4 way - 5/3 - Open Center;4 way - 5/3 - Pressure Center	iso-15407-2-26
	Pneumatic Valve - ISO Valve - 4 Way: 5/2, 5/3 - Numatics Series 5599/1	Air, Inert Gas;Vacuum	1/4;1/2;3/8;3/4	4 way - 5/2;4 way - 5/3;4 way - 5/3 - Closed Center;4 way - 5/3 - Open Center	iso-5599-1
	Pneumatic Valve - ISO Valve - 4 Way: 5/2, 5/3 - Numatics Series 5599/2 (Size 1)	Air, Inert Gas;Vacuum	1/4;3/8	4 way - 5/2;4 way - 5/3;4 way - 5/3 - Closed Center;4 way - 5/3 - Open Center;4 way - 5/3 - Pressure Center	5599/2-1
	Pneumatic Valve - ISO Valve - 4 Way: 5/2, 5/3 - Numatics Series 5599/2 (Size 2)	Air, Inert Gas;Vacuum	1/2;3/8	4 way - 5/2;4 way - 5/3;4 way - 5/3 - Closed Center;4 way - 5/3 - Open Center;4 way - 5/3 - Pressure Center	5599/2-2
	Pneumatic Valve - ISO Valve - 4 Way: 5/2, 5/3 - Numatics Series 5599/2 Size 3	Air, Inert Gas;Vacuum	1/2;3/4	4 way - 5/2;4 way - 5/3 - Closed Center;4 way - 5/3 - Open Center;4 way - 5/3 - Pressure Center