DF3C003 Concentric Flange Butterfly Valve Epoxy Coated Disc and Half Shaft
DF3C003 is a concentric flanged butterfly valve with an epoxy coated disc and half shaft, designed for on-off and throttling service in water, low-pressure industrial lines, and non-corrosive media. It connects via flanges on both ends, allowing direct bolt-up to existing piping without additional flanges. The half shaft design reduces stem length and weight while maintaining reliable torque transfer from the actuator to the disc.
| Model Code | DF3C003 |
|---|---|
| Product Type | Concentric Flange Butterfly Valve[Epoxy Coated Disc and Half Shaft] |
| 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 | DF3C003 |
| Valve Type | Concentric flanged butterfly valve with epoxy coated disc and half shaft |
| Nominal Diameter | Confirmed on request |
| Connection | Flanged, with standard flange drilling |
| Operation | Quarter-turn, lever, gearbox, or actuator |
| Series | DF3C003 concentric flanged butterfly valve series |
What This Model Gives You
- Epoxy coated disc resists corrosion and wear in water and mild chemical service
- Half shaft reduces stem length and weight compared to full shaft designs
- Flanged connection allows direct bolt-up to pipe flanges without extra flange pairs
- Concentric disc design ensures low operating torque and smooth quarter-turn operation
- Built into a valve programme covering DN10 to DN2600 and 0.05 to 4.0 MPa
- Part of a factory-certified production line under ISO 9001 and ISO 14001
Problems It Removes
- Full shaft designs add length and weight to the valve stem, increasing actuator load and installation difficulty
- Uncoated discs can degrade in water service, leading to premature wear and leakage
- Lack of standard flange compatibility forces buyers to customise or stock multiple valve types
- Existing flanges cannot be reused when using wafer-style valves, increasing material cost
- Valves with inconsistent disc alignment under cycling lead to seat wear and leakage over time
Where It Is Installed
- Isolation of water supply lines in municipal distribution networks where space is limited
- Throttling control on low-pressure cooling water circuits in power and HVAC systems
- Batch isolation in chemical process lines handling non-aggressive fluids
- Maintenance shut-off in heating and district heating networks with flanged piping
- Valve replacement in retrofit projects where existing flanges must be reused
Buyers It Suits
- Water utility engineers sourcing flanged butterfly valves for municipal or industrial water systems
- HVAC and plant maintenance teams needing low-torque isolation valves for low-pressure lines
- EPC contractors standardising on flanged butterfly valves across multiple project sites
- Valve distributors stocking a range of concentric flanged valves from DN10 to DN2600
- Piping designers specifying compact valves with flange connections for tight installations
How It Is Built
- Flanged end connection with standard flange drilling
- Concentric disc design with half shaft for reduced stem length
- Epoxy coated disc for improved resistance to water and mild corrosion
- Quarter-turn operation for manual, gearbox, or actuator control
- Part of a flanged butterfly valve series covering DN10 to DN2600 and 0.05 to 4.0 MPa
- Designed for medium- and low-pressure service in water and non-aggressive media
Material Selection
- Body, disc, stem, and seat materials are confirmed per order based on the medium and operating temperature
- Epoxy coating applied to the disc for corrosion resistance in water and non-aggressive fluids
- Material certificates issued upon request with the order
- Disc and seat variants follow the options available in the DF3C series
How It Is Made
- Body castings inspected and machined on in-house fine machining equipment
- Disc coated with epoxy and assembled with the half shaft stem
- Seat fitted and disc alignment checked for concentric travel
- Valve assembled, cycled, and pressure tested before packing
- Marked, wrapped, and crated for container shipment from Tianjin
How It Is Checked
- Dimensional checks on flange bolt pattern and face-to-face length before assembly
- Seat and shell tightness tested on the assembled valve
- Operating torque and full quarter-turn travel verified on every unit
- Testing performed 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 coating variant selected based on the medium and temperature on the buyer's line
- Flange drilling matched to the standard used on the buyer's pipework
- Lever, gearbox, pneumatic or electric actuator fitted before shipment
- Private label marking and packing available on OEM orders
- Mixed-diameter orders combined with other valves in one container
How It Compares With the Alternatives
| Concentric flanged butterfly valve with full shaft | The full shaft version has a longer stem and higher weight, increasing actuator load and installation complexity |
|---|---|
| Wafer type butterfly valve | The wafer body cannot be used at the end of a line; the flanged body allows for end-of-line service and dead-end isolation |
| Double eccentric butterfly valve | The double eccentric design offers better sealing and longer life under higher pressure but is more complex and costly |
| Gate valve at same nominal diameter | The gate valve provides a full bore but is longer, heavier, and requires more space for actuator clearance |
Installing and Operating This Valve
- Confirm the flange standard and bolt pattern on both pipe flanges before ordering
- Ensure the disc is fully open during insertion to prevent seat damage
- Tighten the flange bolts evenly in a cross pattern to avoid misalignment
- After tightening, open the disc fully and confirm free quarter-turn travel
- Do not use the valve as a pipe end closure during pressure testing
- Cycle the valve periodically if it remains in one position for extended periods
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View SpecificationPower Generation
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.
DF3C003 Concentric Flange Butterfly Valve Epoxy Coated Disc and Half Shaft FAQ
What size and pressure rating is DF3C003?
The nominal diameter and pressure rating are confirmed on request based on your line data. The valve series covers DN10 to DN2600 and 0.05 to 4.0 MPa.
Can this valve be used at the end of a pipe run?
Yes. The flanged body allows for end-of-line service and dead-end isolation, unlike a wafer-type valve.
What is the purpose of the epoxy coated disc?
The epoxy coating improves resistance to corrosion and wear in water and non-aggressive media, extending disc life.
Can it be supplied with an actuator?
Yes. The stem accepts a lever, gearbox, or pneumatic or electric actuator, and the valve can be assembled and tested with the actuator before shipment.
Do you supply larger diameters in the same series?
Yes. The DF3C003 series continues through the larger nominal diameters, covering DN10 to DN2600 across the product programme.
What certifications does the factory hold?
Tianjin MIC Valve Co., Ltd. is certified to ISO 9001 quality management system and 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 will provide a quotation and confirmed specification sheet.
Get a Price for DF3C003 Concentric Flange Butterfly Valve Epoxy Coated Disc and Half Shaft
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.