DF3B001 Concentric Flange Butterfly Valve Nylon Coated Disc and Gearbox
DF3B001 is a concentric flanged butterfly valve with a nylon-coated disc and gearbox, designed for on-off and throttling service in water, low-pressure industrial lines, and similar applications. The flanged body connects directly to pipe flanges using bolts, and the gearbox enables quarter-turn operation with reduced manual effort. The nylon-coated disc reduces wear and friction, improving cycle life in frequent-duty service.
| Model Code | DF3B001 |
|---|---|
| Product Type | Concentric Flange Butterfly Valve[Nylon Coated Disc and Gearbox] |
| 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 | DF3B001 |
| Valve Type | Concentric flanged butterfly valve with nylon coated disc and gearbox |
| Connection | Flanged, bolted to pipe flanges |
| Operation | Quarter-turn with gearbox |
| Disc Material | Nylon coated |
| Series | DF3B001 flanged butterfly valve series |
What This Model Gives You
- Flanged body connects directly to pipe flanges without welding or additional fittings
- Nylon-coated disc reduces wear and friction during repeated opening and closing
- Gearbox provides mechanical advantage for easier operation in larger diameters
- Concentric disc design ensures low torque and smooth operation at low pressure
- Quarter-turn operation with gearbox allows precise control and position confirmation
- Part of a valve programme certified to ISO 9001 and ISO 14001
Problems It Removes
- Manual operation of large-diameter butterfly valves is too difficult without mechanical assistance
- Disc wear from repeated cycling leads to leakage and reduced service life in abrasive or frequent-duty lines
- Lack of gearbox options forces operators to use extended levers or external tools
- Existing valves with metal-on-metal contact cause high friction and premature failure
- Buyers need a single supplier who can cover both small and large diameters in the same valve type
Where It Is Installed
- Isolation of water supply lines in municipal distribution networks where frequent operation is required
- Throttling control on low-pressure cooling water circuits in power and industrial plants
- Zone shut-off in HVAC systems where manual operation must be easy and reliable
- Process line isolation in chemical and pharmaceutical plants with non-corrosive media
- Maintenance access points in heating and plumbing systems where low torque is preferred
Buyers It Suits
- Water utility engineers specifying low-torque isolation valves for frequent use
- HVAC and building services contractors needing easy-operated valves for maintenance access
- Industrial plant maintenance teams replacing worn discs in butterfly valves with longer life
- Valve distributors stocking flanged butterfly valves with gearbox options for retrofit projects
- EPC buyers sourcing medium- and low-pressure valves for water and heating systems
How It Is Built
- Flanged body with bolt holes matching standard flange patterns
- Concentric disc design with nylon coating on the disc surface
- Gearbox fitted to the stem for quarter-turn operation with mechanical advantage
- Quarter-turn operation suitable for manual, lever, or actuator use
- Part of a flanged butterfly valve series that continues through larger nominal diameters
Material Selection
- Body, disc, stem, and seat materials are confirmed per order based on the buyer's medium and temperature
- Nylon coating applied to the disc surface to reduce wear and friction
- Material certificates are issued with the order when requested by the buyer
How It Is Made
- Body castings inspected and machined on in-house fine machining equipment
- Disc prepared with nylon coating and fitted to the stem
- Gearbox assembled and aligned with the stem for smooth operation
- Valve assembled and tested for full quarter-turn travel and tight shut-off
- 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
- Gearbox operation and torque 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 operating conditions
- Gearbox type and ratio confirmed per order for torque and speed requirements
- Flange drilling matched to the standard used on the buyer's pipework
- Private label marking and packaging available on OEM orders
- Mixed-diameter orders combined with other valves in one container
How It Compares With the Alternatives
| Concentric flanged butterfly valve without gearbox | The gearbox reduces manual effort, especially in larger diameters or frequent-duty applications |
|---|---|
| Wafer type butterfly valve | The flanged body allows independent installation and supports end-of-line service; the wafer body cannot |
| Metal disc butterfly valve | The nylon-coated disc reduces wear and friction, extending service life in frequent cycling |
| Ball valve at same nominal diameter | The butterfly valve has lower cost and shorter face-to-face length, but the ball valve offers tighter sealing at higher pressure |
Installing and Operating This Valve
- Confirm the flange standard and bolt pattern on both pipe flanges before ordering
- Ensure the disc is in the open position before installing the valve between flanges
- Tighten the flange bolts evenly in a cross pattern to avoid misalignment
- After installation, operate the gearbox through a full quarter-turn to confirm free movement
- Do not use the flanged body 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.
DF3B001 Concentric Flange Butterfly Valve Nylon Coated Disc and Gearbox FAQ
What size and pressure rating is DF3B001?
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?
Yes. The flanged body can be installed at the end of a line, provided the pipe flange is present and properly aligned.
What is the disc coating material and its purpose?
The disc has a nylon coating to reduce wear and friction during repeated cycling, improving service life in frequent-duty applications.
Can the gearbox be replaced or upgraded?
Yes. The gearbox can be specified with different ratios or replaced with a different type during ordering, depending on torque and speed requirements.
Do you supply the larger diameters in the same series?
Yes. The DF3B001 flanged butterfly valve series continues through the larger nominal diameters, covering DN10 to DN2600.
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, medium, and operating conditions by WhatsApp or email and our sales engineers reply with a quotation and confirmed specification sheet.
Get a Price for DF3B001 Concentric Flange Butterfly Valve Nylon Coated Disc and Gearbox
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.