ZJHP Pneumatic Diaphragm Control Valve

ZJHP Mini Pneumatic Diaphragm Single-seat Control Valve

it is consist of pneumatic diaphragm mulitiple-spring actuator and mini single-seat valve. the merit of multiple-spring actuator is low height, light weight and simple outfit, mini valve are compact conformation, fluently gate and large coefficient of flow.
valve body
Type			Straight single-seat casting ball valve
Nominal Diameter			20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200mm
Nominal Pressure			PN1.6, 4.0, 6.4MPa
Flange Standard			JB/T79.1-94. 79.2-94 etc.
Material			cast steel (ZG230-450) cast stainless steel (ZG1Cr18Ni9Ti ZG1Cr18Ni12Mo2Ti) etc.
Bonnet			standard -17~+230℃, Radiating type +230~ +450℃
Gland type			bolt hold type
Packing			V-PTFE packing, asbestos textile packing, graphite packing, asbestos with PTFE packing
valve inner part
Spool valve			Single-seat plunger spool valve
Flow characteristic			Equal percentage/Liner
Material			Stainless steel (1Cr18Ni9Ti , 1Cr18Ni12Mo2Ti, 17-4PH, 9Cr18, 316L) Titanium etc.
Actuator
Type			ZHA/B multiple-spring diaphragm actuator
Type No.			ZHA/B-22	ZHA/B-23	ZHA/B-34		ZHA/B-45	ZHA/B-56
Effective area cm²			350	350	560		900	1400
Stroke mm			10/16	25	40		40/60	100
Spring area			20~100(standard) ; 20-60 ; 60-100 ; 40-200 ; 80-240
Diaphragm material			NBR with nylon, ethylene propylene rubber with nylon
Supply gas pressure			140~400MPa
Air interface			RC1/4'
Ambient temperature			-30 ~ +70℃
valve action type: air-to-close (B)----valve position is opening (FO); air-to-open (K)----valve position is close
Accessories: Positioner, Air filter decompressor, Position switch, Valve position transmitter and so on.
Performance
Item			No Positioner			Positioner
Fundamental error%			±5.0			±1.0
Hysteresis error %			≤3.0			≤1.0
Dead band %			≤3.0			≤0.4
Original point	Air to open	Initial point	±2.5			±1.0
		End point	±5.0			±1.0
	Air to close	Initial point	±5.0			±1.0
		End point	±2.5			±1.0
Rated stroke deviation %			≤2.5
Steam loss I/h			0.01% x nominal capacity of valve
Adjustable extent R			30:1

Derated coefficient of flow Kv, Rated Stroke, Actuator type
Nominal diameter mm		20				25	32	40	50	65	80	100	125	150	200
Seat diameter mm		10	12	15	20	25	32	40	50	65	80	100	125	150	200
Derated coefficient of flow Kv	Straight line	1.8	2.5	4.4	5.9	11	17.6	27.6	44	69	110	176	275	440	690
Derated coefficient of flow Kv	Equal perfentage	1.6	2.5	4.0	6.3	10	16	25	40	63	400	160	250	400	630
Rated stroke		10				16	25			40			60
Actuator type		ZHA/B-22					ZHA/B-23			ZHA/B-40			ZHA/B-45