pneumatic diaphragm cut-off valve

Model：ZMAQ、ZMAM
Category：Pneumatic Valve
origin：SHANGHAI

SHANGHAI AUTOMATION INSTRUMENTATION CO., LTD

ZMAQ、ZMAM pneumatic diaphragm cut-off valve

Pneumatic diaphragm cut-off valve, is the execution unit of pneumatic unit combination instrument. Simple structure, large operation force, small size, light weight, small flow resistance, large capacity, good sealing, convenient maintenance. Widely used in petroleum, chemical, metallurgy, power, textile for automatic control system

Nominal diameter DN(mm)		15	20	25	32	40	50	65	80	100	125	150	200
Rated flow coefficient kv	Sleeve			11	20	30	48	75	120	190	300	480	760
	Single-seat	5	7	11	20	30	48	75	120	190	300	480	760
	Three-way
Rated travel (mm)		8				12		20		25	40		50
Allowed leakage	Hard sealing（L/H）	Sleeve5×10-5rated capacity, single-seat、three-way 1.2×10-7×rated capacity
	Soft sealing（ml/min）	None
Media temperature ℃		-200～+200、-40～+450
Active area of diaphragm（cm2）（diaphragm cut-off valve）		100				200		400			600	1000
Nominal pressure PN(MPa)		1.6　4.0　6.4
Allowed pressure difference （MPa）	Single-seat	6.4	6.4	3.8	2.5	2.9	1.8	2.0	1.3	0.83	0.8	0.55	0.52
	Sleeve	6.4
Signal pressure KPa		200（diaphragm ）
Valve body		Ht200 ZG230-450\ZG1Cr18Ni9Ti
Valve sleeve		1Cr18Ni9Ti Cr18Ni12Mo2Ti
Valve spool、valve seat		1Cr18Ni9Ti Cr18Ni12Mo2Ti
Filler		PTFE flexible graphite
Components		Air filter regulator 、solenoid valve 、feed back device of valve position