pneumatic low-temperature control valve

Model：ZMAP-16D
Category：Pneumatic Valve
origin：SHANGHAI

SHANGHAI AUTOMATION INSTRUMENTATION CO., LTD

ZMAP-16D pneumatic low-temperature control valve

Pneumatic diaphragm low-temperature adjusting valve, is the improved product based on single, double-seat adjusting valve. Use long-necked upper cover, make filler work under normal temperature. Used for regulating media(like liquid oxygen, liquid nitrogen), temperature in -60～-250℃. For ensure regulation precision, should equipped with a valve positioner

Structure principle

Pneumatic low-temperature adjusting valve, made up of pneumatic diaphragm actuator and anti-low-temperature single, double-seat valve

Signal pressure from regulator, input into air room of pneumatic diaphragm actuator, produce thrust, drive valve spool, position of valve spool changes, then change the flow cross-sectional area, then can regulate the flow of meida

Nominal diameter DN	Single-seat	20										25		32			40		50		65		80	100		125	150		200
	Double-seat											25		32			40		50		65		80	100		125	150		200
Rated flow coefficient Kv	Single-seat	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
	Double-seat											10		6		25		40		63		100		160		250		400		630
Flow characteristics		Straight line			Straight line；equal percentage
Model of actuator								ZMA-2					ZMA-3									ZMA-4					ZMA-5
Travel		10			10			16					25									40					60
Action mode		Air off （B）， air on （K）
Spring pressure KPa		Standard signal ：20～100； other signal ；40～200；20～60；60～100