Papermaking Industry Use Large Size Pneumatic Control Valve

• Customization: Available
• Temperature: Ordinary Temperature
• Certification: GS, RoHS, CE, ISO9001
• Model NO.: ZJHP
• Media: Gas, Oil, Water, Acid
• Standard: Standard
• Connection Mode: Flange
• Power: Pneumatic
• Material: Stainless Steel
• Type: Sleeve
• Transport Package: Plywood Case
• Specification: DN50-DN600
• Trademark: HUIZHENG
• Origin: China
• HS Code: 8481804090
• Production Capacity: 50000pieces/Year

Product Description

Papermaking Industry Use Large Size Pneumatic Control Valve


Product Introduction

ZJHP pneumatic flow control valve is a small pneumatic single seat control valve, comprehensive development of advanced technology at home and abroad. The valve body is single seat valve, double seat, sleeve seat. And it is the development direction of today's control valve.
ZJHP pneumatic flow control valve is composed of multi - spring pneumatic diaphragm actuator and top - guided through away low flow resistance single - seat valve. It has the advantages of compact structure, light weight, sensitive action, S-streamline fluid channel, small pressure drop loss, large valve capacity, accurate flow characteristics. It is equipped with electric-air positioner or pneumatic positioner which can realize the automatic regulation and control of the process. The valve is widely used in the precise control of gas, liquid, steam in pressure, flow, temperature, liquid level and other parameters to maintain a given value. If there is no air source at the site, electric actuator could be replaced.

Technical Parameters
 

Body type	Straight type casting body
Nominal diameter	DN20~300mm
Nominal pressure	PN 1.6, 2.5, 4.0, 6.4, 10.0 MPa
Flange standard	GB/T9113, JB/T79, HG20594
Connection type	Flange(FF, RF, RTJ), Welding(SW, BW), Screw(suitable in 1")
Bonnet type	High temperature type +250~+450ºC, Ultra high temperature type+250~+560ºC
Gland type	Bolted compression type
Packing	V type PTFE, containing impregnated PTFE asbestos, asbestos textile, graphite
Main parameter	Power supply voltage: 220V/50Hz, input signal: 4-20mA or 1-5V·DC, output signal: 4-20mA·DC Protection grade: IP55, flameproof mark: EXDIIBT4, hand function: handle Ambient temperature: -25 ~ +70ºC, ambient humidity: ≤95%

Base Material
  

Valve body, bonnet	HT200, ZG230-450 ZG1Cr18Ni9Ti
Valve disc, seat	1Cr18Ni9Ti, surfacing of Stellite alloy
Soft seal disc	reinforced polytetrafluoroethylene
Packing	PTFE, flexible graphite
Corrugated tube	1Cr18Ni9Ti
Gasket	rubber asbestos board, 10, 1Cr18Ni9Ti, asbestos spiral wound gasket
Diaphragm cover	A3
Corrugated diaphragm	nitrile rubber clip reinforced polyester fabric
Spring	60Si2Mn
Stem, push rod	2Cr13, 1Cr18Ni9Ti
Bushing	2Cr13

Feature
 

1. ZJHP pneumatic flow control valve is the implementation unit of the instrument in the automatic control system with electric-gas valve positioner driven by electric signals and compressed air. It accepts the input 0-10mA DC or 4-20mA DC current signal and the compressed air will be converted into air source pressure signal input and output by the regulator. It can realize the division control (segment amplitude signal) to change the valve opening and achieve the precise control of the process parameters.
2. ZJHP pneumatic flow control valve can be divided by direct action and reverse action according to the mode of action. Direct action: Air to closed-Failed to open, when the pressure signal increases, the valve closed. Reverse action: Air to open-Failed to closed, when the pressure signal increases, the valve open.
3. ZJHP pneumatic flow control valve is straight single seat casting valve with single plunger type disc, especially suitable for small leakage and small pressure difference.
4. The control valve is straight through with low flow resistance, top guide and no bottom bonnet. The valve is composed of seat and plug type disc. It has a good sealing, small leakage, quick action, s-shaped streamlined, small pressure drop loss, large capacity, precise flow characteristic, large adjust rang. The guide area of disc is large to strong ant-vibration. It is applicable to strict requirements of the medium leakage and regulation accuracy. Due to the valve structure, the unbalance force on the stem is larger in the big nominal diameter. So the valve is only suitable for the small pressure difference.
5. Different spool shapes will get different flow characteristics such as percentage (logarithmic), linear,  quick opening.
6. The valve spool can be designed and made into according to the requirements of working conditions. And the soft sealing structure is suitable for -20~+120ºC temperature requires strict tightness of acid and alkali, gas.

Actuator

Actuator	ZHA/B Multi-spring diaphragm actuator
Model	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	24	40	40,60	100
Spring range(KPa)	20~10, 20-60, 60-100, 40-200, 80-240
Diaphragm material	Nitrile rubber and nylon cloth, ethylene propylene rubber and nylon cloth
Air supply	140~400KPa
Air connetction	RC1/4"
Ambient temperature	-30~+70ºC
Accessories	Positioner, air filter pressure reducer, position valve, travel switch, valve position transmitter, handwheel mechanism, etc.
Acting	Air close(B)-fail to close(FO), air open(K)-fail to close(FC)

Technical parameters

 

DN (mm ) (dn)			20				25	32	40	50	65	80	100	125	150	200
			(10)	(12)	(15)	(20)
Kv		Liner	1.8	2.8	4.4	6.9	11	17.6	27.5	44	69	110	176	275	440	690
		Percentage	1.6	2.5	4.0	6.3	10	16	25	40	63	100	160	250	400	630
Rated stroke L (mm)			16					25			40			60
Diaphragm effective area Ae (cm^2 )			280					400			600			1000
Signal range Pr (kPa)			20 ~ 100 , 40 ~ 200
Air pressure Ps (MPa)			0.14 ~ 0.4
Flow characteristics			Straight line, equal percentage
Adjustable ratio			50
Allowable leakage			Hard sealing: IV  soft sealing: VI
PN(MPa)			1.0 , 1.6 , 4.0 , 6.4
Working temperature t ( ºC )	Normal		-20 ~ 200 , -40 ~ 250 , -60 ~ 250
	Cooling		-40 ~ 450 , -60 ~ 450
	High		450 ~ 560
	Low		-60 ~ -100 , -100 ~ -200 , -200 ~ -250

Performance indicators
 

Project		Value	Project				Value
Intrinsic error%	No positioner	±5.0	Zero deviation %	Air close	No positioner	Beginning	±5.0
	With positioner	±1.0				Ending	±2.5
Hysteresis error%	No positioner	≤3.0			With positioner	Beginning	±1.0
						Ending	±1.0
	With positioner	≤1.0		Air open	No positioner	Beginning	±2.5
						Ending	±5.0
Dead band%	No positioner	≤3.0			With positioner	Beginning	±1.0
						Ending	±1.0
	With positioner	≤0.4	Allowable leakage L/h				1×10^-4×capacity
Rated stroke deviation%		±2.5

Details and dimensions and weight

     

DN	L			H		H1				Weight(kg)		φA
	PN16	PN40	PN64	Normal	High T	PN6	PN16	PN40	PN64	PN6 PN16	PN40 PN64
20	180	194	206	398	548	45	52		65	19	23	285
25	185	197	210	410	560	50	57		70	20	24
40	222	235	251	455	620	65	75		85	26	35
50	254	267	286	457	627	70	82		90	30	40
65	276	292	311	610	790	80	92		100	47	66	360
80	298	317	337	622	807	95	100		107	55	78
100	352	368	394	640	850	105	110	117	125	65	99
150	451	473	508	870	1130	132	142	150	172	130	160	470
200	600		650	890	1150	160	170	187	207	175	250
250	730		775	1203	1523	187	202	225	235	350	470	580
300	850		900	1234	1554	220	230	257	265	500	660

         

 
Connection dimensions and standards

Flange standard: Cast iron is GB4216-86 Cast steel is GB9113-88, JB/T79-94
Flange seal standard: PN10, PN16 is RF, PN40,PN64 is FM, the body is M
Structural length standard: GB12221-89
Connection of actuator air signal: Internal thread M10×1
The flange and distance of flange end face can be manufactured according to the standard specified by the user. Such as ANSI, JIS, DIN standard.

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FAQ:

1. Are you trading company or factory?
We are factory in Yongjia, Wenzhou, China.
2. Are the prodcuts certified?
Yes, ISO, FDA, SIL 2, CE, LFGB and so on.
3. Delivery time?
7-15 working days usually, but it will be longer when peak season.
4. MOQ?
One set.