pneumatic diaphragm through double-seat control valve

Model：ZHAN
Category：Pneumatic Valve
origin：SHANGHAI

SHANGHAI AUTOMATION INSTRUMENTATION CO., LTD

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ZHAN pneumatic diaphragm through double-seat control valve

Pneumatic diaphragm through double -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 double -seat adjusting valve, made up of ZHA pneumatic diaphragm multi-spring actuator and VN through double-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

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

Nominal diameter DN（mm）	25	32	40	50	65	80	100	125	150	200
Rated flow coefficient KV	10	16	25	40	63	100	160	250	400	630
Inherent flow characteristic	Straight line；equal percentage
Nominal pressure DN（MPａ）	1.6、4.0、6.4
Working temperature ℃	－20～＋200；－40～＋250；－40～＋450；－60～＋450；
Environment temperature ℃	－40～＋85；
Model of actuator	ZHA－22		ZHA－23		ZHA－34			ZHA－45
Rated travel （mm）	16		25		40			60
Active area of diaphragm（㎝2）	350				560			900
Pressure of air supply （MPａ）	0.14；0.25；0.4
Spring pressure （KPａ）	20～100；40～200；20～60；60～100
Connection thread	M16×1.5