Name: COVNA Pneumatic Steam Control Valve with Positioner
Brand: GETM
Availability: InStock
Rating: 4.7 (60 reviews)

Products /
Control Valve /
Pneumatic Control Valve /
COVNA Pneumatic Steam Control Valve with Positioner

COVNA Pneumatic Steam Control Valve with Positioner

The main advantages of the COVNA Pneumatic Steam Control Valve are that the opening and closing speed of the pneumatic control valve is easy to adjust, the structure is simple, and it is easy to maintain. Due to the buffer characteristics of the gas itself during the operation, it is not easy to be damaged due to jamming. It is more reliable than the electric valve in some explosion-proof situations

Model: pneumatic control valve
Size Range: 3/4''~8'
Pressure Range: PN16~PN100
Material: WCB, 304, 316, 316L

Advantages of COVNA Pneumatic Steam Control Valve with Pneumatic Acuator:

● 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 COVNA Pneumatic Steam Control Valve with Pneumatic Acuator:

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 COVNA Pneumatic Steam Control Valve with Pneumatic Acuator:

Weight table of Pneumatic diaphragm regulating valve

Company Profile:

Factory Profile:

Company Certificates:

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.

●22 years manufacturer of actuated valves

●Mass customaztion acceptable. 3 production base, large stock,

●Short lead time, same day shipping.

●German imported manufacturing facilities, 100% Q.C passed before shipping, quality assured.

●Industrial standard 1 year (12 months) warranty.

●ISO 9001 certificated, with extra certifications include CE, TUV, RoHS, SGS, BV, explosion & fire safe.

●OEM / ODM service available. Can do JIS 5K / 10K, ANSI 150lb / 300lb / 600lb / 900lb standard.

●More infomation, pls send message to us. Quote will be provided within 2 hours!

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