DE3D001 Double Eccentric Flange Butterfly Valve Resilient Seat and Wormgear
DE3D001 is a double eccentric flanged butterfly valve with a resilient seat and wormgear actuation, designed for on-off and throttling service in water, low-pressure industrial, and heating systems. The double eccentric design reduces seat wear during operation and allows for tighter sealing under pressure. The flanged connection enables direct bolt-on installation to pipe flanges without welding, and the wormgear provides smooth, precise control with reduced operator effort.
| Model Code | DE3D001 |
|---|---|
| Product Type | Double Eccentric Flange Butterfly Valve [Resilient Seat and Wormgear] |
| Category | Eccentric 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 | DE3D001 |
| Valve Type | Double eccentric flanged butterfly valve with resilient seat and wormgear |
| Connection | Flanged, bolt-on to pipe flanges |
| Operation | Quarter-turn with wormgear actuation |
| Series | DE3D001 double eccentric flanged butterfly valve series |
| Nominal Diameter Range | DN10 to DN2600 mm |
| Nominal Pressure Range | 0.05 to 4.0 MPa |
What This Model Gives You
- Double eccentric design minimises seat wear and extends seal life during repeated operation
- Resilient seat provides reliable bidirectional sealing at low to medium pressure
- Flanged body allows direct bolt-on installation to existing pipe flanges without welding
- Wormgear actuation reduces operating torque and enables precise throttling control
- Quarter-turn operation with wormgear gives clear visual position indication
- Part of a valve programme certified to ISO 9001 and ISO 14001 for consistent quality
Problems It Removes
- Gate valves are too bulky and heavy for tight spaces between flanges in retrofit installations
- Single eccentric butterfly valves wear out seats quickly due to high contact pressure during operation
- Manual operation of large valves requires excessive force, increasing operator fatigue
- Lack of actuation options on standard butterfly valves limits automation and remote control
- Inconsistent valve performance across different brands leads to spare part complexity
Where It Is Installed
- Isolation and throttling in municipal water supply distribution networks at low to medium pressure
- Control of flow in heating and cooling circuits in industrial and commercial buildings
- Process line shut-off in chemical and pharmaceutical plants where low leakage is required
- Pump discharge control in power plant auxiliary systems with frequent cycling
- Valve integration in skid-mounted packages where space and installation speed matter
Buyers It Suits
- Water utility engineers specifying valves for distribution and pumping stations
- HVAC and building services contractors standardising on quarter-turn valves for heating systems
- EPC firms sourcing medium- and low-pressure valves for industrial projects
- Valve distributors stocking flanged butterfly valves with actuation options
- Plant maintenance teams replacing leaking gate valves with more compact butterfly solutions
How It Is Built
- Double eccentric disc design with offset stem and disc centre
- Flanged end connection for bolt-on installation to pipe flanges
- Resilient seat for bidirectional sealing and low leakage
- Wormgear actuation for reduced operating torque and precise control
- Quarter-turn operation suitable for manual, gearbox, or actuator integration
- Part of a DE3D series covering DN10 to DN2600 with pressure ratings from 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
- Resilient seat material options follow the variants available in the DE3D flanged 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
- Disc and stem assembled with eccentric offsets and fitted to the stem with precision
- Resilient seat installed and aligned for centred disc travel and even contact
- Wormgear unit mounted and tested for smooth operation and torque transfer
- Assembled valve 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 tightness and shell integrity 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
- Seat and disc variant selected based on the medium and temperature on the buyer's line
- Wormgear actuation can be replaced with lever, gearbox, or pneumatic/electric actuator on request
- Flange drilling matched to the buyer's pipe standard and flange specification
- Private label marking and packaging available for OEM orders
- Mixed-diameter orders combined with other valves in one container for shipping efficiency
How It Compares With the Alternatives
| Double eccentric butterfly valve with lever | The lever requires more force to operate at larger sizes; the wormgear reduces torque and improves control |
|---|---|
| Gate valve at DN100 | The gate valve offers a full bore but is heavier, longer, and harder to operate manually |
| Single eccentric flanged butterfly valve | The single eccentric design has higher seat contact pressure and wears faster under repeated cycling |
| Butterfly valve with electric actuator | The wormgear is lower cost and simpler for manual operation; the electric actuator adds automation but increases complexity |
Installing and Operating This Valve
- Confirm the flange standard and bolt pattern on both pipe flanges before ordering
- Ensure the disc is fully closed before installing the valve between flanges
- Tighten the flange bolts evenly in a cross pattern to avoid misalignment
- After installation, open the disc fully and confirm smooth quarter-turn travel
- 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
Related Models Industries and Guides
DE3D001 Double Eccentric Flange Butterfly Valve Resilient Seat and Wormgear FAQ
What size and pressure rating is DE3D001?
It is a flanged butterfly valve in the DE3D series, covering nominal diameters from DN10 to DN2600 mm and nominal pressures from 0.05 to 4.0 MPa. The exact rating is confirmed on request based on your line conditions.
Can this valve be used with an electric actuator?
Yes. The wormgear can be replaced with a pneumatic or electric actuator before shipment. The stem is compatible with standard actuator mounting interfaces.
Which materials are used for the body, disc, and seat?
Material selection depends on the medium and temperature on your line. We confirm the combination during quoting and issue material certificates upon request.
Is the wormgear actuation manual or automatic?
The wormgear is manual, providing reduced operating torque and precise control. It can be fitted with a gearbox or actuator for automated operation.
Does the valve have bidirectional sealing?
Yes. The resilient seat provides bidirectional sealing, so the valve can be installed in either direction in the pipeline.
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 confirmed specification sheet.
Get a Price for DE3D001 Double Eccentric Flange Butterfly Valve Resilient Seat 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.