Name: COVNA Pneumatic Diaphragm Regulating Valve with Digital Display
Brand: GETM
Availability: InStock
Rating: 4.7 (72 reviews)

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COVNA Pneumatic Diaphragm Regulating Valve with Digital Display

COVNA Pneumatic Diaphragm Regulating Valve with Digital Display

The pneumatic control valve is composed of an actuator and an adjustment mechanism. The actuator is the thrust component of the adjustment valve. It generates a corresponding thrust according to the pressure of the control signal to push the adjustment mechanism into action. The valve body is the regulating component of the pneumatic regulating valve. It directly contacts the regulating medium to regulate the flow, pressure, temperature and other process parameters of the fluid. The pneumatic control valve has the characteristics of simple control, fast response, and intrinsically safe, without additional explosion-proof measures. Pneumatic control valve is one of the industrial process control instruments widely used in petroleum, chemical, electric power, metallurgy and other industrial enterprises.
Model: pneumatic control valve
Size Range: 3/4''~8'
Pressure Range: PN16~PN100
Material: WCB, HT200、ZG25I、ZG1Cr18Ni9、ZGOCr17Ni12Mo2、1.25Cr0.5Mo、5.0Cr0.5Mo、 SCPH21、Ti

Advantages of Pneumatic Diaphragm Regulating Valve with Digital Display:

● It is cost-effective and safe to be used,which can help you save cost of the whole system and maintenance.
● It has a simple structure and a big torque, explosion-proof with short actuating times,optimized actuating forces and reliable tight sealing.
● It can perfectly avoid problems of friction, corrosion, and emissions.
● It is of low center of gravity, high vibration resistance and easy to install.
● Simple to control, rapid response, and intrinsic safety, no need to take additional explosion-proof measures.
● Fluid channels in a s- shaped streamline, small pressure drop loss large flow, wide adjustment range, high precision flow .

Working Principle Of Pneumatic Diaphragm Regulating Valve with Digital Display:

By receiving the control signal pressure output by the standard electric signals of the regulator(via electricity-air positioner or electricity-air converter), the valve opening is changed, so as to change the flow of the medium to be regulated and then allow parameters such as flow, pressure, temperature and liquid level to be regulated. As a result, the production process automation is achieved.
After the extraneous pneumatic pressure signal is input into the diaphragm chamber, it will act on the diaphragm to produce thrust. The thrust them compress the spring pack, and move the push rod, which drives the spindle to open(close) of the valve clack until the balance is achieved between the thrust and reaction of the compressed spring pack and the clack is in a stable position of the stroke. It is concluded from the above principle. There is a definite proportional relation between the clack and the input pressure signal.

Technical Parameters of Valve Actuator :

Nominal Size DN (mm)		20				25	32	40	50	65	80	100	125	150	200	250	300
		10	12	15	20
Rated Flow Coefficient CV	High accuracy flow characteristic clack	1.6	2.5	4.0	6.3	10	17	24	44	68	99	175	275	360	630	900	1440
	High capacity flow characteristic clack	1.8	2.8	4.4	6.9	11	21	30	50	85	125	200	310	440	690	1000	1600
Rated Stroke(mm)		10				16		25		40			60			100
Effective Diaphragm Area cm²		280						400		630			1000			1600
Inherent Regulation Ratio		50:1
Nominal Pressure MPa		1.6 / 4.0 / 6.4
Sevice Temperature		-100~-60℃; -200~-100℃; -250~-200℃
Ambient Temperature		-30~70℃
Air Supply Pressure KPa		0.14 / 0.25 / 0.40
Spring Range KPa		20~100(Basic type) / 40~200 / 80~240
Connection Thread		G1/4" , M16X1.5

Technical Parameter of Valve Body:

1. Major performance indexes shall be as shown in below table

2. Testing shall be conducted according to the specification of GB/T4213-92

Serial No.	Technical Performance	Without Positioner	With Positioner
1	Basic Error	≤±5%	≤±1%
2	Return Difference	≤3%	≤1%
3	Dead Zone	≤3%	≤0.4%
4	Leakage	ZJHP Type:≤1X10-4Rated FlowZJHM Type:≤1X10-3 Rated Flow
5	Rated Flow Coefficient	≤±10%
6	Inherent Flow Characteristic	Slope±30%

Dimension of Pneumatic Diaphragm Regulating Valve with Digital Display:

Weight table of Pneumatic diaphragm regulating valve

Technical Parameter of Valve Body:

Nominal Size	DN15-DN200	Body Material	PVC, UPV, CPVC, PVDF and PPH
End Connection	True Union, Double Union Thread	Structure	T Port / L Port
Operating Pressure	1.0 / 1.6 MPa (10 / 16 bar)	Voltage Tolerance	±10%
Suitable Media	Corrosive media, Water, Air, etc	Temperature Of Media	-5~80℃ (23℉~176℉)
Design standard	ISO, DIN, IDF, SMS, 3A	Orifice(mm)	15, 20, 25, 32, 40, 50, 65, 80, 100

Package & Shipping:
As a professional electric ball valve manufacturer, COVNA aims to provide our customers the best quality products with the most competitive pricing, on-time delivery and full warranty service with omprehensive service from start to finish, encompassing consultation through to after sales service, full support in every respect and ensure that you are accompanied at each stage of your project.

Company Profile:

Factory Profile:

Company Certificates:

Purchase Guide:

● Confirm the valve size you need. We offer this motorized PVC ball valve in 1/2in to 4in.

● Confirm the valve body material you need. We offer this motorized PVC ball valve in UPVC, CPVC, PPH and PVDF material.

● Confirm the connection standard. We offer this motorized PVC ball valve in ANSI, JIS, DIN, and UK standard.

● Confirm the pressure and working temperature. Pressure and temperature are the important points and those may affect the cost.

● Confirm the voltage you need. The right voltage could help your valve operate better.

● Tell us your medium. Different medium has different features and we will help you to select the valve basic on the medium requirements

● Confirm the actuator type you need. We have on/off type, modulating type, intelligent type, explosion-proof type, IP68 type and auto return type electric valve actuator for your project.

Any requirements please tell us like core material, sealing material, or connection standard. We could help you to custom the valve you need.

More infomation, please send message to us. Quote will be provided within 2 hours! [email protected]

Technical Parameter of Actuators:

Nominal Diameter		G 3/4″	20				25		40			50			65			80			100			150			200			250	300
Valve Seat Diameter		3 4 5 6 7 8	10	12	15	20	20	25	25	32	40	32	40	50	40	50	65	50	65	80	65	80	100	100	125	150	125	150	200
Rated Flow Coefficient Cv	High Accuracy Flow Characteristic Clack	0.08 0.12 0.20 0.32 0.50 0.80	1.8	2.8	4.4	6.9	6.9	11	11	17.6	27.5	17.6	27.5	44	27.5	44	69	44	69	110	69	110	176	176	275	440	275	440	690	1000	1600
	High Capacity Flow Characteristic Clack		1.6	2.5	4	6.3	6.3	10	10	16	25	16	25	40	25	40	63	40	63	100	63	100	160	160	250	400	250	400	630	900	1440
Rated Strock(mm)		10	16						25						40									60						100
Effective Diaphragm Area (cm2)		220	350												560									900						1400
Inherent Regualtion Ratio		50:1
Nominal Pressure MPa		0.16 1.6 4.0 6.4 (ANSI125 150 300 600LB)(JIS10 16 20 30 40K)
Sevice Temperature		-20 to 200℃ -40 to 250℃ -40 to 450℃ -60 to 450℃
Ambient Temperature		-40 to 85℃
Air Supply Pressure KPa		0.14(0.25 0.4)
Spring Range KPa		20 to 100(40 t o200 80 to 40 20 to 60 60 to 100)
Connection Threaded		Female Thread M10×1