What is a Double Eccentric Butterfly Valve?
If you’re in the water industry, you may not have heard about double eccentric butterfly valves,
Welded body Seat
- Double overlay 316L SST Body Seat.
- Robot welded and finished.
- No chance of the seat coming loose with high velocities.
Ductile iron Body / 250 PSI
- The Av-Tek DEX body and disc are constructed of Ductile Iron as a standard.
- 250 PSI Pressure Rating – Bi-Directional.
- Cast in lifting eyes for easy installation.
- Meets AWWA C504 and C519.
O-Rings
- 8 O-Rings create a dry shaft so you no longer need to exercise the valve.
- O-Ring shaft seals can be changed without removing the valve shaft you can remove the gear from the valve while under pressure.
- The front cover, under the gearbox, keeps you from getting wet, with the valve in the closed position.
2205 Duplex
- 2205 Duplex SST is standard on all DEX valves.
- Duplex is stronger than 316 SST.
- Duplex is more corrosion resistant than 316, 304 and 17-4 PH.
- Shaft pins are used to secure the disc to the shaft with isolating O-Rings.
Double offset
- With the stem on the back of the disc and the seat on the front of the valve body, this is a double offset butterfly valve.
- Double offset BFV’s make it so the resilient seat is not compressed between the body and disc.
- When a compression seat set happens on the EPDM seat, it will cause a leak path, this happens on standard AWWA C504 Butterfly Valves.
Replaceable seat / Blowout proof design
- EPDM Resilient Seat on the Disc.
- EPDM Holds up great when chlorine is present.
- 316 SST Retaining ring for ease of maintenance.
- EPDM Seat has a “T” Shape, making it blow out proof.
Other Features
- Stems are drilled and tapped on the end making maintenance easier.
- FA Mounting Flanges for Gears and Actuators.
- Buried Service or Plant service in stock.
- Electric, Pneumatic and Hydraulic actuators can be adapted easily.
- Each valve is thoroughly tested before it leaves the factory.
AWWA DEX Double Eccentric Butterfly Valves
Certified Zero Leakage
This valve meets and exceeds AWWA C504 and AWWA C519
Certified
to NSF/ANSI/CAN 61/372
Welded body Seat
- Double overlay 316L SST Body Seat.
- Robot welded and finished.
- No chance of the seat coming loose with high velocities.
Ductile iron Body / 250 PSI
- The Av-Tek DEX body and disc are constructed of Ductile Iron as a standard.
- 250 PSI Pressure Rating – Bi-Directional.
- Cast in lifting eyes for easy installation.
- Meets AWWA C504 and C519.
O-Rings
- 8 O-Rings create a dry shaft so you no longer need to exercise the valve.
- O-Ring shaft seals can be changed without removing the valve shaft you can remove the gear from the valve while under pressure.
- The front cover, under the gearbox, keeps you from getting wet, with the valve in the closed position.
2205 Duplex
- 2205 Duplex SST is standard on all DEX valves.
- Duplex is stronger than 316 SST.
- Duplex is more corrosion resistant than 316, 304 and 17-4 PH.
- Shaft pins are used to secure the disc to the shaft with isolating O-Rings.
Double offset
- With the stem on the back of the disc and the seat on the front of the valve body, this is a double offset butterfly valve.
- Double offset BFV’s make it so the resilient seat is not compressed between the body and disc.
- When a compression seat set happens on the EPDM seat, it will cause a leak path, this happens on standard AWWA C504 Butterfly Valves.
Replaceable seat / Blowout proof design
- EPDM Resilient Seat on the Disc.
- EPDM Holds up great when chlorine is present.
- 316 SST Retaining ring for ease of maintenance.
- EPDM Seat has a “T” Shape, making it blow out proof.
Other Features
- Stems are drilled and tapped on the end making maintenance easier.
- FA Mounting Flanges for Gears and Actuators.
- Buried Service or Plant service in stock.
- Electric, Pneumatic and Hydraulic actuators can be adapted easily.
- Each valve is thoroughly tested before it leaves the factory.
AWWA DEX Double Eccentric Butterfly Valves
Tired of dealing with constant failures and frustrations caused
by poor-quality butterfly valves?
Get the job done without worrying about malfunctions. Av-Tek’s DEX Double Eccentric Butterfly Valves provide what others can’t or won’t:
- AVAILABILITY: We keep our products in stock, ready for shipping.
- QUALITY: Each valve is thoughtfully tested before leaving the factory.
- HASSLE-FREE EXPERIENCE: Less maintenance, longer life, fewer replacements, no dripping!
Afraid you won’t be able to perform the necessary maintenance on your system due to failed butterfly valves?
With Av-Tek ®, you get a double offset, high-performance butterfly valve, that far exceeds the standard (commodity type) AWWA valves!
01
O-rings and Shaft Seals
- 8 O-Rings create a dry shaft so you no longer need to exercise the valve
- O-Ring shaft seals can be change with out removing the valve shaft
- The front cover, under the gearbox, keeps you from getting wet, with the valve in the closed position, and you remove the gear from the valve while under pressure.
02
Double offset Design
- With the stem on the back of the disc and the seat on the front of the valve body, this is a double offset butterfly valve
- Double offset BFV’s make it so the resilient seat is not compressed between the body and disc
- When a compression seat set happens on the EPDM seat, it will cause a leak path, this happens on standard AWWA C504 Butterfly Valves
03
Welded Body Seat
- Double overlay 316L SST Body Seat
- Robot welded and finished
- No chance of the seat coming loose with high velocities.
04
Materials of Construction
- The Av-Tek DEX body and disc are constructed of Ductile Iron as a standard
- 250 PSI Pressure Rating – Bi-Directional
- Cast in lifting eyes for easy installation
05
2205 Duplex SST Shaft
- 2205 Duplex SST is standard on all DEX valves
- Duplex is stronger than 316 SST
- Duplex is more corrosion resistant than 316, 304 and 17-4 PH
- Shaft pins are used to secure the disc to the shaft
06
Resilient Seat and Retaining Ring
- EPDM Resilient Seat on the Disc
- EPDM Holds up great when chlorine is present
- 316 SST Retaining ring for ease of maintenance
- EPDM Seat has a “T” Shape, making it blow out proof
07
Other Features
- Stems are drilled and tapped on the end making maintenance easier
- FA Mounting Flanges for Gears and Actuators
- Buried Service or Plant service in stock
- Electric, Pneumatic and Hydraulic actuators can be adapted easily
Embrace the Power of Double Eccentric Butterfly Valves
Did you know that most water operators and engineers in the USA have never experienced the benefits of a double-offset or double eccentric butterfly valve.
Av-Tek is here to change that! While this technology may be new to the US market, it has been trusted worldwide for decades.
Why Are Av-Tek’s DEX Double Eccentric Butterfly Valves Different From Standard Valves?
Our double offset butterfly valves offer a unique and innovative design that sets them apart from
standard valves.
● Leak-Free Performance: Say goodbye to leaks with Av-Tek Valves! Our double offset butterfly valves come with a unique three-year, leak-free warranty. Unlike standard commodity valves that create a leak path when exercised or left in the open position, Av-Tek’s design ensures a tight seal throughout the operation.
● Maintenance Made Easy: Don’t let maintenance become a costly headache. Av-Tek’s double eccentric butterfly valves feature a dry shaft, thanks to a series of 8 O-ring seals. Unlike standard valves that require wetting and regular exercising, our valves prevent corrosion without any additional maintenance efforts.
Experience Longevity, Low Maintenance, and Drip-Tight Shut-off
By upgrading to Av-Tek’s high-performance valves, you’ll enjoy extended valve life, reduced maintenance requirements, and drip-tight shut-off.
We believe in providing you with a reliable product that minimizes downtime and maximizes efficiency.
We keep our products in stock to make sure, we can ship to our clients in a timely manner.
Frequently Asked Questions
Q: What warranty does Av-Tek offer on their valves?
A: We offer a three-year, leak-free warranty on our double offset butterfly valves. Your satisfaction and confidence in our products are our top priorities. Contact us to discuss your needs.
Q: Can Av-Tek valves handle complex valve applications?
A: Absolutely! Av-Tek valves are specifically engineered to handle even the most challenging applications. We offer detailed specifications and expert guidance to ensure optimal performance and reliability. Contact a sales representative to discuss your specific needs.
Q: Are Av-Tek valves suitable for large-scale projects?
A: Yes, our valves are suitable for both individual purchases and large-scale projects. Whether you’re a maintenance professional or an engineer overseeing a major undertaking, Av-Tek has the right valve solutions to meet your requirements. Contact a sales representative to explore available options.
Q: Where can I find more information about Av-Tek DEX Double Eccentric Butterfly Valves?
A: Download our product brochure here with the specifications, features, and additional details. And contact us here to discuss your needs with a sales representative.
Don’t Let Subpar Valves Hinder Your Productivity Any Longer!
Upgrade to Av-Tek’s DEX double eccentric butterfly valves and experience the difference in reliability and performance. If you have any questions or need guidance on butterfly valves for your system, we’re here to help! Reach out to our knowledgeable team, and let us assist you in making the right choice for your valve needs.
What many are finding to be true and you will too, is that by using higher quality valves, you get a longer life out of the valve, less maintenance, and drip tight shut off.
Feel free to reach out to us for all your questions you might have in regards to butterfly valves in your system.
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