Covna Proportional Control Pressure Reducing Valve Price Pneumatic Diaphragm Three Way Regulating Valve with Positioner

• Media: Normal
• Power: Electric
• Material: Wcb, 304, 316, 316L
• Core Seat: 304, 316+ Slt
• Warranty: 1 Year
• Keyword: Pneumatic Diaphragm Three Way Regulating Valve
• Model NO.: COVNA Pneumatic diaphragm control valve
• Port Size: Contact Us
• Temperature of Media: High Temperature
• Connection: Flange
• Flow Characteristics: Equal Percentage, Linear, Quick-Opening
• Customized Support: OEM
• Nominal Diameter: DN20-DN200
• Low Temperature Type: -60~-196
• Structure: Control
• Nominal Pressure: Pn16, Pn40
• Application: General
• Sealing Surface: Pn16 Convex Surface, Pn40 Concave Surface
• Core Type: Single Seat Plunger Type
• Transport Package: International Standard Packaging
• Trademark: CONVA
• Origin: Guangdong, China
• Production Capacity: 10000 Piece/Pieces Per Month

Product Description

Product Description

Advantage of COVNA Pneumatic Diaphragm Three Way Regulating Valve:

1.Compact structure, light weight, sensitive action, low pressure drop loss, new high allowable pressure, large valve capacity, accurate flow characteristics and convenient maintenance, etc.,
2.Pneumatic 3 way regulating valve can be used for various working conditions, especially for the temperature control system of oil industry heat exchange and automatic control of other industries.
3.Spool structure with side guiding, well stability, no vibration, low noisy, Pneumatic 3 way mixing regulating valve can bear
high pressure difference, easy for connection.
4.While with low nominal size and pressure difference, 3 way mixing regulating valve can be used in diverting occasion. However, while nominal size higher than DN100 and high pressure difference, Pneumatic 3 way mixting regulating valve and Pneumatic 3 waydiverting regulating valve can't be exchanged.

Item	COVNA Pneumatic Control Valve Modulating Valve Pneumatic Diaphragm Three Way Regulating Valve With Positioner
Acting Mode	Multi-Spring diaphragm type
Working Pressure	1.6, 4.0, 6.4MPa
Air Supply Pressure	0.14, 0.16, 0.28, 0.4MPa
Lifespan	1,000,000 (1 Million) Times
Temperature	-30°C~70°C
Body Material	WCB LCB CF8 CF3 CF8M CF3M
End Connection	Flanged
Gasket	Metal graphite packing
Applicable Media	Control of Water, Air, Gas, Oil, Liquid, Steam, etc
Optional Accessories	Namur Solenoid Valve, Limit Switch, F.R.L, Position Indicator, Manual Device
Application	Food & Beverage, Water & Wastewater, Ultra Pure Water, Desalination, Chemical, Textile, Pharmaceutical, Pulp & Paper, Mining, Boiler and Power Industries

Dimension:

Type of Pneumatic Diaphragm Three Way Regulating Valve:

Weight table of Pneumatic diaphragm regulating valve:

Electric Actuator

Multi-spring diaphragm actuator in direct action & reverse action. NBR rubber reinforcing polyester fabric diaphragm material. Spring range 20~100KPa, 40~200KPa, 80~240KPa. Supply pressure from 0.4MPa to 0.5MPa.

Control Valve Type\ Method	Pneumatic diaphragm actuator
		ZJHPZJHM
		Multi-spring type
Usage	Regulating type, ON-OFF type
^Air supply pressure or Power supply voltage	Air supply pressure (Spring range) 14020100Kpa G 240 (40200) Kpa G 280 (80240) Kpa G
Connector	Air pipe connector: RC1/4
Direct action	Pressure increase, stem descend, valve close.
Reaction	Pressure increase, stem ascend, valve open.
Input signal	4020mA.DCwith positioner
Lag	≤1%FSwith positioner
Linear type	2%FSwith positioner
Environmental temperature	-10+70
Pneumatic control valve Accessories	E/P, P/P valve positioner, filter regulator, valve converter, solenoid valve, limited switch Non-standard accessories, need special customized notes.

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%

Available in Stainless Steel 304, Stainless Steel 316, Carbon Steel, Cr-Mo Steel

 

Also available in Cast Iron for your choice

 

Buyer Feedback

Company Profile

Company strengths:

1.COVNA-Specialized Manufacturer of High Quality Actuated Valve for 22 Years.

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

3.Extensive flow control project experience and various product solutions can beoffered.

4.OEM / ODM service available. Can do JIS 5K / 10K, ANSI 150lb / 300lb / 600lb / 900lb standardOffer various
international standard, ANSI, JIS, DIN, etc.

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

6.Inquiry will be replied within 8 hours.

7.Custom complaints handed by one stop professional service.

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

9.Industrial standard 1 year (12 months) warranty.

10.On time delivery, comprehensive warranty service, consultation to after-sales service in place.

Factory Strength:

Exhibition&Finished Project

Project of Motorized Valve

 

Project of Pneumatic Actuated Valve

 

Project of Solenoid Valve

 

Packaging & Delivery

FAQ

Q: What is the difference between Normally Open and Normally Closed valves?
A: As the name suggests, Normally Open valves allow air to pass when they are not energized (or actuated). Normally Closed valves must be actuated to allow air to pass.

Q: What is the life span of your pneumatic actuators?
A: We have passed 1 million times of product quality test, and obtained the certificate

Q: Does the air actuated valve have a manual override?
A: The air actuator does not have a manual override, but a manual override is provided with optional direct mount solenoid valves.

Q:How fast does an air actuated valve operate?
A: See product specifications. Generally, smaller valves less than 2 inch pipe size, cycle in about one second. Larger valves up to 6 inch pipe, cycle in about 1.5 seconds. A cycle is per 90° rotation

Q:Can I add a High Temperature kit to an existing Valworx air actuated?
A:Yes, you would need to select a kit matching both the actuator and valve mounting patterns. See actuator accessories

Q:Can I mechanically adjust the flow rate of an air actuated ball valve?
A: No, but we do offer pneumatic positioners with 4-20mA or 3-15PSI inputs. Positioners allow user to adjust flow 0-100%.

Q:Can I use the air actuated ball valve outside?
A: Yes, air actuated valves are weatherproof per materials of construction. Do not exceed minimum and maximum temperature specifications.

Q:Do you have a way to confirm the air actuated valve is in the closed position? Open position?
A: Yes, we offer an optional valve monitor/limit switch box. Monitor contains (2) dry contact limit switches used to confirm openand closed position. There is also a highly visual valve position indicator.

Q:What is the maximum allowable fluid velocity?
A:Metal valves: 5 to 10 feet/second, closer to 5ft/sec is better PVC valves: < 5 feet/second

Q:Can you customize the color of the actuator?
A: We can customize different colors, LOGO and so on according to customer's requirements.

 

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