HK59-D-G Series 4 inch Metal Seated Pneumatic Actuator Operated Butterfly Valve
Three eccentric butterfly valve is widely used in metallurgy, electric power, petrochemical industry, water supply and drainage, municipal construction and other industrial pipelines with medium temperature ≤ 425 ℃, for regulating flow and breaking fluid. Normally material: cast iron, cast steel, stainless steel. If the stem axis deviates from the disc center and the body center at the same time, and the rotation axis of the valve seat has a certain angle with the channel axis of the valve body, it is called three eccentric butterfly valve
- Model: HK59-D-GF
- Size Range: 2”~18”
- Pressure Range: 1.0MPa to 2.5MPa
- Material: Stainless Steel
COVNA HK59-D-GF Pneumatic three eccentric butterfly valve, the valve body part adopts three eccentric structure, the valve plate and sealing mechanism are unique in design, with excellent cutting performance and durability, as well as dual functions of cutting and adjusting. It is small in size, light in weight, economical and practical, and easy to maintain; Low friction, high efficiency, high thrust and good safety; Simple, eye-catching, reliable and integrated travel indication, combined installation of limit switch and solenoid valve, no external pipeline, reducing leakage point; It can realize bidirectional sealing function, which can be adjusted and cut off
A variety of actuator forms are available for selection to meet the requirements of different users; The design of flexible and combined actuator (manual mechanism) can ensure the free installation and flexible control in all directions
| Technical Parameters of Valve Actuator |
| Double acting | Air to open, air to close, air supplier failure to keep the current position |
| Single acting N/C | Air to open, interrupt air to close, air failure to close |
| Single acting N/O | Air to close, interrupt air to open, air failure to open |
| Optional accessory | Reversing solenoid valve, limit switch box, air filter reducing valve, positioner, handle manual, lock up valve. |
| Technical Parameters of Valve Body |
| Body | Valve components | ||
| Size range | DN50~DN400 | Sealing material | Stainless steel |
| Body material | Stainless tseel | Core material | Stainless steel |
| End conection | Wafer, Flange | Stem material | Stainless steel |
| Operating pressure | 1.0, 1.6MPa | Applicable media | Water, oil, Gas, Liquid, steam, powder, anti-corrosive base |
| Structure | Midline Structure/ A-type | ||
| Company Certificates |
| Package & Shipping |
| Technical Parameters of Valve Actuator |
| Double acting | Air to open, air to close, air supplier failure to keep the current position |
| Single acting N/C | Air to open, interrupt air to close, air failure to close |
| Single acting N/O | Air to close, interrupt air to open, air failure to open |
| Optional accessory | Reversing solenoid valve, limit switch box, air filter reducing valve, positioner, handle manual, lock up valve. |
| Technical Parameters of Valve Body |
| Body | Valve components | ||
| Size range | DN50~DN400 | Sealing material | Stainless steel |
| Body material | Stainless tseel | Core material | Stainless steel |
| End conection | Wafer, Flange | Stem material | Stainless steel |
| Operating pressure | 1.0, 1.6MPa | Applicable media | Water, oil, Gas, Liquid, steam, powder, anti-corrosive base |
| Structure | Midline Structure/ A-type | ||
The actuator on my automated valve operates, but the valve won’t turn. Why?
Most likely the valve stem or actuator coupling is broken.
Why doesn’t my valve open or close completely when the actuator operates it?
The electric actuator limit switches or the pneumatic actuator position stops are not correctly adjusted.
When I energize the solenoid on my pneumatic actuated valve, the valve won’t turn. How come?
Probably because there is no air pressure to the solenoid or dirt has jammed it. Also, debris might be trapped inside the valve. Or, the air pressure is not sufficient to operate the actuator. Remember: measure air pressure at the actuator, not at the compressor.
Can I buy an actuator from one manufacturer and mount it to a valve from another manufacturer?
Maybe. First, be sure that the actuator torque output is sufficient to turn the valve reliably. Second, you will have to fabricate a custom mounting bracket and coupling to connect the actuator to the valve.
What happens if I lose power to my electric actuator in the middle of an actuation cycle?
The valve will stop somewhere between full open and close. When power is reapplied to the original circuit, the actuator will complete the cycle.
I ordered a fail open pneumatic actuated valve by mistake. I needed a fail closed one. What can I do?
To make the change just remove the actuator from the valve and turn it, or the valve stem, 90 degrees and remount the actuator.
I’ve installed my automated valve in the line, but now I don’t know if the valve is in the open or closed position. How can I find out?
Remove the actuator from the valve and check the valve stem. Most ball valves have stem flats at right angles to the flow when the valve is in the off position. On butterfly valves check the stem flow arrow marking.
Do I have to have the solenoid valve that controls the air supply to my pneumatic actuator mounted right on the actuator?
Remove the actuator from the valve and check the valve stem. Most ball valves have stem flats at right angles to the flow when the valve is in the off position. On butterfly valves check the stem flow arrow marking.
How do I wire up my electric actuator?
Check the electric wiring schematic that came with the actuator for the correct hookup. Sometimes a copy is inside the actuator cover. If it is missing, don’t guess about the connections. Call the manufacturer for a schematic.
I’ve just installed an electric actuated valve and when I power it, it turns the valve 360 degrees and won’t shut off. What’s wrong?
The actuator is wired incorrectly (check the schematic accompanying the actuator), or the external control switch is not the correct type for the actuator.
My electric actuators cycle time is way too fast, can I slow it down?
Not unless you bought it with an optional speed control.
I just replaced a solenoid valve with an electric actuated valve and it won’t work. Why?
Actuators and solenoid valves require different types of electrical control switches. SPDT for actuators, SPST for solenoids. Check the actuator wiring schematic for the correct wiring and switch type.
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About Us
Create since 2000, We first started as a solenoid valves manufacturer. Over decades of research and development,
COVNA has become the China market leader in quarter turn actuator and automatic control valve products.
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