pneumatic diaphragm through single-seat control valve

Model：ZM(A/B)P
Category：Pneumatic Valve
origin：SHANGHAI

SHANGHAI AUTOMATION INSTRUMENTATION CO., LTD

Click enlarge

ZM(A/B)P pneumatic diaphragm through single-seat control valve

Pneumatic diaphragm through single-seat adjusting valve, is the general actuator of automatic control system. Simple structure, reliable action, convenient maintenance, widely used in chemical, petroleum, power, metallurgy for automatic adjustment and remote control

Structure principle

Pneumatic diaphragm through single-seat adjusting valve, made up of pneumatic diaphragm actuator and through single-seat valve

Small flow valve is single-seat structure, impact structure, small size, light weight, convenient maintenance

Conical valve spool, small control flow, good sealing, precise regulation

Nominal diameter DN（mm）			G3/4“					20			25					32	40	50	65	80	100	125	150	200
Rated flow coefficient KV			0.08	0.12	0.20	0.32	0.50		0.80		1.2	2.0	3.2	5.0	8	12	20	32	50	80	120	200	280	450
Inherent flow characteristics			Straight line					Straight line；equal percentage
Nominal pressure PN（MPａ）			10					1.6；4.0；6.4
Model of actuator			ZM（A/B）-1					ZM（A/B）-2			ZM（A/B）-2					ZM（A/B）-3			ZM（A/B）-4			ZM（A/B）-5
Rated travel mm			10					10			16					25			40			60
Spring pressure KPａ			20～100；20～60；60～100；40～200
Allowed error△P（MPａ）	Action output pressure MPａ	0.02	PN				7.8		5.9	5.3		3.7	2.3	1.3	0.8	0.5	0.5	0.3	0.25	0.20	0.12	0.12	0.308	0.05
		0.04	PN					PN					5.5	3.1	1.8	1.2	1.1	0.7	0.65	0.45	0.28	0.28	0.20	0.10
Dimension mm	A		Φ230					Φ280									Φ325		Φ410			Φ495
	L	PN1.6	－					180			185					200	220	250	275	300	350	410	450	550
		PN6.4	（PN10）120					190			200					210	235	265	295	320	370	440	475	570
	H1	Normal temperature	Air off 412　　air on 463					air off 545/ air on 598			557					563	631	646	869	872	876	1031	1039	1078
		Heat sink	Air off 696　　 air on 749					air off 696/ air on 749			708					714	782	797	1020	1023	1027	1246	1254	1293
	H2		32					65			99					105	116	131	165	173	177	225	233	282

Principle: input signal pressure that action on air room of diaphragm, drive valve spool, travel of valve spool changes, change the flow area, then regulate the processing parameters of pressure, temperature, flow and liquid level