Covna Stainless Steel Pneumatic Knife Gate Valve 4 Inch for Slurry, Water, and Heavy Duty Applications

• Customization: Available
• Media: Air, Gas, Oil, Liquid
• Type: Pneumatic Knife Gate Valve
• Pressure: 0.6MPa~2.5MPa
• Application: General
• Warranty: 1 Year
• End Connection: Flange
• Size: 2′′~12′′, DN50~DN300
• Port Size: 2′′~12′′, DN50~DN300
• Air Supply Pressure: 0.4MPa~0.6MPa
• Customized Support: OEM
• Sealing Material: PTFE, Metal Seated
• Structure: Gate
• Acting Mode: Double Acting/Single Acting Pneumatic Actuator
• Power: Pneumatic
• Certificate: CE, RoHS, ISO9001, TUV
• Trademark: COVNA
• Origin: Guangdong, China
• Production Capacity: 10000 Set/Sets Per Month

Product Description

Product Description

 

Feature of COVNA Pneumatic Knite Gate Valve:

Integral structure, ultra-thin design, full-diameter flow, not easy to leak, easy to disassemble
Movable sealing structure, good sealing performance, strong wear resistance, automatic compensation, long life
Fixed guide claw design, replacing the groove structure, not easy to accumulate, and prevent blocking
Double bearing design, small torque, frequent opening and closing, no vibration, no noise
Knife-shaped cutting edge, strong cutting force, self-cleaning function, suitable for fiber particle fluid

Nominal Pressure	0.6MPa, 1.0MPa, 1.6MPa, 2.5MPa, 150Lb	Nominal Diameter	DN50~DN1000
Operating Temperature	-30 ~300(Range of temperature subject to the material of sealing and property of medium)	Flange Drilling	ANSI B16.5, GB/T9113, JB/T79, HG, SH, JIS, DIN, NF, BS
Main Materials	C.I, WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8, CF8M, CF3,CF3M. 2Cr25Ni20	Seal Type	Stainless steel hard seal, soft seal
Applicable Medium	Mud, material, viscous, granular fluid	Connection Type	Flanged Type, Lug type, Wafer type
Leakage	Stainless steel hard seal: Grade D (Liquid0.1XDN mm3/s)	Soft Seal	Grade A (Zero Leakage)
Accessories	1.Flange  2.Solenoid valve  3.Air filter 4.Limit switch	Air-supply pressure	0.4~0.6MPa
Solenoid valve voltage	DC24V AC220V	Optional Accessories	Namur Solenoid Valve, Limit Switch, F.R.L, Position Indicator, Manual Device

Dimension:

Flange Pneumatic Knife Gate Valve:

Lug Pneumatic Knife Gate Valve:

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Company Profile

 

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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.