DF3A005 Concentric Flange Butterfly Valve Al-Bronze Disc and Wormgear
DF3A005 is a concentric flanged butterfly valve with an al-bronze disc and wormgear actuation, designed for on-off and throttling service in water, low-pressure industrial, and heating systems. It connects to pipe flanges via bolted flange ends, allowing installation in existing flanged piping without welding. The al-bronze disc resists wear and corrosion in water and mild chemical service, while the wormgear provides smooth, precise quarter-turn operation with high torque output for larger sizes.
| Model Code | DF3A005 |
|---|---|
| Product Type | Concentric Flange Butterfly Valve[Al-Bronze Disc and Wormgear] |
| Category | Concentric Flanged Butterfly Valves |
| Manufacturer | Tianjin MIC Valve Co., Ltd. |
| Size and Pressure Rating | Confirmed on quotation |
| Certification | ISO 9001 and ISO 14001 certified plant |
| Model | DF3A005 |
| Valve Type | Concentric flanged butterfly valve |
| Disc Material | Al-bronze |
| Actuation | Wormgear |
| Connection | Flanged |
| Series | DF3A005 concentric flanged butterfly valve series |
What This Model Gives You
- Flanged connection allows bolted installation without welding, reducing site work and assembly time
- Al-bronze disc resists corrosion and wear in water and low-pressure industrial media
- Wormgear actuation provides high torque output and smooth operation for larger nominal diameters
- Concentric disc design ensures low operating torque and minimal pressure drop in open position
- Quarter-turn operation enables quick visual confirmation of valve position
- Part of a valve programme certified to ISO 9001 and ISO 14001 with in-house design and production
Problems It Removes
- Welded valves require skilled labor and time on site; flanged valves can be bolted in place quickly
- Steel discs corrode in water systems; al-bronze discs maintain integrity over time
- Manual valves with handwheels become difficult to operate at larger sizes; wormgear provides mechanical advantage
- Valves with poor sealing under cycling fail prematurely; concentric design ensures consistent closure
- Lack of standardisation across valve brands increases spare parts inventory; a single model family reduces stock complexity
Where It Is Installed
- Isolation of water supply lines in district heating systems where corrosion resistance is required
- Throttling control in low-pressure cooling water circuits in power and industrial plants
- On-off service in municipal water distribution networks with frequent cycling
- Maintenance isolation in chemical process lines handling water-based or mildly corrosive fluids
- Installation in existing flanged piping where welding is not permitted or practical
Buyers It Suits
- Procurement engineers sourcing flanged butterfly valves for water and heating systems in project packages
- Plant maintenance teams replacing worn valves in high-cycling applications
- EPC contractors standardising on a single valve type across multiple projects
- Valve distributors stocking flanged butterfly valves with corrosion-resistant discs
- System integrators needing a reliable, low-maintenance valve for medium- and low-pressure lines
How It Is Built
- Flanged end connection with bolt holes matching standard flange patterns
- Concentric disc design with al-bronze disc for corrosion resistance
- Wormgear actuation for quarter-turn operation with high torque output
- Resilient seat for bidirectional sealing under low to medium pressure
- Quarter-turn stem compatible with manual actuation or automation
- Part of a product programme covering DN10 to DN2600 and 0.05 to 4.0 MPa
Material Selection
- Body, disc, stem, and seat materials are confirmed per order based on the medium and operating temperature
- Disc is al-bronze; seat material follows the resilient seat variants in the DF3A series
- Material certificates are issued with the order upon request
How It Is Made
- Body castings inspected and machined on in-house fine machining equipment
- Al-bronze disc and stem assembled and fitted with the resilient seat
- Wormgear unit mounted and aligned with the stem for smooth operation
- Valve assembled, cycled, and pressure tested before packing
- Marked, wrapped, and crated for container shipment from Tianjin
How It Is Checked
- Dimensional check of flange bolt pattern and face-to-face length before assembly
- Seat and shell tightness tested on the assembled valve under pressure
- Operating torque and full quarter-turn travel verified on every unit
- Testing conducted on the 10 sets of imported inspection and testing equipment
- Records maintained under the ISO 9001 quality management system
Certificates Issued With This Valve
- ISO 9001 quality management system certification
- ISO 14001 environmental management system certification
Certification statements are limited to the management system certificates the factory actually holds. Product-level approvals for your market are confirmed before order.
What Can Be Changed
- Disc material and seat variant selected based on the medium and temperature on the buyer's line
- Flange drilling matched to the standard used on the buyer's piping system
- Wormgear actuation can be replaced with lever, gearbox, or actuator on request
- Private label marking and packaging available for OEM orders
- Mixed-diameter orders combined with other valves in one container for efficient shipping
How It Compares With the Alternatives
| Concentric flanged butterfly valve with handwheel | The handwheel requires more effort at larger sizes; the wormgear provides mechanical advantage and smoother operation |
|---|---|
| Lug type butterfly valve | The lug body allows end-of-line service; the flanged body requires flanges on both sides and cannot be used as a pipe end closure |
| Gate valve with flanged ends | The gate valve offers a full bore but is heavier, longer, and more expensive; the butterfly valve saves space and weight |
| Butterfly valve with electric actuator | The wormgear is manual and lower cost; the electric actuator enables automation but adds complexity and power requirements |
Installing and Operating This Valve
- Confirm the flange standard, bolt pattern, and pressure rating before ordering
- Ensure both pipe flanges are clean and flat before bolting the valve in place
- Tighten the flange bolts evenly in a cross pattern to avoid misalignment
- Operate the wormgear slowly to check for smooth quarter-turn travel and no binding
- Do not use the flanged valve as a pipe end closure during pressure testing
- Cycle the valve periodically on lines that remain in one position for long durations
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Cooling water circulating water and auxiliary system isolation for power station pipework.
Heat Supply
District heating primary and secondary circuit isolation balancing and expansion.
Preventing Seat Leakage in Butterfly Valves
Where butterfly valve seats actually fail and what to change in specification or installation.
DF3A005 Concentric Flange Butterfly Valve Al-Bronze Disc and Wormgear FAQ
What size and pressure rating is DF3A005?
The nominal diameter and pressure rating are confirmed on request based on your line data, as the same model is available in multiple variants across the DN10 to DN2600 range and 0.05 to 4.0 MPa pressure range.
Can this valve be used at the end of a pipe run?
No. A flanged butterfly valve requires flanges on both sides to clamp against. For end-of-line service, consider a lug type or a different body style.
Which materials are used for the body, disc, and seat?
The disc is al-bronze. Body and seat materials are confirmed per order based on the medium and temperature. Material certificates are issued upon request.
Can it be supplied with a different actuator?
Yes. The wormgear can be replaced with a lever, gearbox, or actuator. The valve is assembled and tested with the actuator before shipment.
Do you supply the larger diameters in the same series?
Yes. The DF3A005 series continues through the larger nominal diameters, and our valve programme covers DN10 to DN2600 across all families.
What certification does the factory hold?
Tianjin MIC Valve Co., Ltd. is certified to the ISO 9001 quality management system and the ISO 14001 environmental management system.
How do I get a quotation?
Send the model, quantity, flange standard, and medium by WhatsApp or email and our sales engineers reply with a quotation and a confirmed specification sheet.
Get a Price for DF3A005 Concentric Flange Butterfly Valve Al-Bronze Disc and Wormgear
Tell us the quantity, flange standard and the medium on your line. You get a quotation with a confirmed specification sheet, not a catalogue page.