DL3A001 Lug Butterfly Valve Pin Type and Gearbox
DL3A001 is a lug type butterfly valve with a pin-fixed disc and gearbox, designed for on-off and throttling service in medium- and low-pressure industrial pipelines. It features a lug body with threaded inserts on both ends, allowing it to be installed at the end of a line or between flanges with a single flange on one side. The pin-fixed disc ensures precise alignment and torque transfer during repeated cycling, reducing wear and leakage risk. The gearbox provides mechanical advantage for manual operation on larger sizes or higher pressure applications.
| Model Code | DL3A001 |
|---|---|
| Product Type | Lug Butterfly Valve[Pin type and Gearbox] |
| Category | Lug Type Butterfly Valves |
| Manufacturer | Tianjin MIC Valve Co., Ltd. |
| Size and Pressure Rating | Confirmed on quotation |
| Certification | ISO 9001 and ISO 14001 certified plant |
| Model | DL3A001 |
| Valve Type | Lug type butterfly valve with pin and gearbox |
| Connection | Lug body with threaded inserts on both ends |
| Operation | Quarter-turn with gearbox for manual actuation |
| Series | DL3A001 lug butterfly valve series |
| Nominal Diameter Range | DN10 to DN2600 mm |
| Nominal Pressure Range | 0.05 to 4.0 MPa |
What This Model Gives You
- Lug body allows installation at the end of a pipe run or in dead-end service where a wafer body cannot be used
- Pin-fixed disc maintains disc-centre alignment under repeated cycling, improving sealing reliability
- Gearbox reduces operator effort for large-diameter or high-pressure valves, enabling manual operation with less force
- Quarter-turn operation with gearbox allows precise control and clear visual position indication
- Built into a valve programme covering DN10 to DN2600 and 0.05 to 4.0 MPa, supporting project scalability
- Manufactured under ISO 9001 and ISO 14001 certified processes for consistent quality and environmental compliance
Problems It Removes
- Wafer valves cannot be used at the end of a pipe run, requiring a lug body for dead-end service
- Friction-fit disc connections can loosen over time, leading to misalignment and leakage after cycling
- Manual operation of large valves becomes impractical without mechanical assistance like a gearbox
- Lack of standardised gearbox integration forces buyers to source and assemble components separately
- Inconsistent valve performance across different sizes and pressures due to non-uniform design across suppliers
Where It Is Installed
- Isolation at the end of a pipe run in water distribution or heating systems where a flange is only available on one side
- Throttling control in low-pressure process lines where manual operation with mechanical advantage is needed
- Maintenance access points in petrochemical or pharmaceutical piping where valves must be installed with one flange
- Retrofitting in existing systems where space constraints prevent the use of longer gate valves
- Control of flow in sewage treatment plant pipelines where reliable on-off service is required under variable pressure
Buyers It Suits
- Plant engineers specifying end-of-line isolation valves for water, heating, or chemical systems
- EPC contractors sourcing valves for projects with mixed installation configurations
- Valve distributors stocking lug butterfly valves with gearbox options for larger diameters
- Piping designers needing a compact, reliable valve that can be used in both flanged and end-of-line setups
- Facility operators requiring manual valves with reduced operating torque for high-pressure or large-diameter service
How It Is Built
- Lug body with threaded inserts on both ends for end-of-line or single-flange installation
- Disc fixed to the stem with pins rather than a friction fit, ensuring torque transfer and alignment
- Quarter-turn operation with gearbox for manual actuation, reducing required operator effort
- Designed for use in medium- and low-pressure applications with nominal pressure up to 4.0 MPa
- Part of a product programme that spans DN10 to DN2600, supporting a wide range of project sizes
- Suitable for on-off and throttling service in water, steam, oil, and non-corrosive chemical lines
Material Selection
- Body, disc, stem, and seat materials are confirmed per order based on the medium and operating temperature
- Seat and disc variants are selected from the standard options available in the DL3A001 series
- Material certificates are issued upon request with the shipment
How It Is Made
- Body castings inspected and machined on in-house fine machining equipment
- Disc and stem assembled with pin fixation as a matched unit
- Seat fitted and closure member set for centred travel and proper sealing
- Valve assembled with gearbox and tested for full quarter-turn operation and torque
- Final inspection and pressure test conducted before packing
- Marked, wrapped, and crated for shipment from Tianjin
How It Is Checked
- Dimensional check of lug hole spacing and thread depth 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 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 and seat variant selected based on the medium and temperature on the buyer's line
- Gearbox type and mounting configuration matched to the buyer's operational needs
- Flange drilling and thread standard matched to the buyer's piping system
- Private label marking and packaging available on OEM orders
- Mixed-diameter orders combined with other valves in one container for efficient shipping
How It Compares With the Alternatives
| Lug butterfly valve with half shaft | The half-shaft version simplifies the stem but the pin-fixed disc transfers torque more directly and reliably under heavy cycling |
|---|---|
| Wafer type butterfly valve | The wafer body requires flanges on both sides; the lug body allows end-of-line installation |
| Gate valve at DN150 | A gate valve provides a full bore but is longer, heavier, and requires more space for operation |
| Ball valve at DN150 | A ball valve offers tighter sealing at higher pressure but costs more and has a larger footprint |
Installing and Operating This Valve
- Confirm the flange standard and thread type on the pipe end before ordering
- Ensure the pipe end is clean and free of burrs before installing the valve
- Install the valve with the gearbox aligned to allow full quarter-turn travel without obstruction
- Tighten the lug bolts evenly in a cross pattern to avoid body distortion
- Do not use the lug body as a pipe end closure during pressure testing
- Cycle the valve periodically on lines that remain in one position for extended periods
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How To Choose Between Wafer and Lug Butterfly Valves
The body style decides whether the valve can hold the line on its own. Here is how to pick without guessing.
DL3A001 Lug Butterfly Valve Pin Type and Gearbox FAQ
What size and pressure rating is DL3A001?
DL3A001 is available in 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 the buyer's line data.
Can this valve be used at the end of a pipe run?
Yes. The lug body with threaded inserts on both ends allows installation at the end of a pipe run or in dead-end service.
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 quotation and issue material certificates upon request.
Can it be supplied with a different gearbox or actuator?
Yes. The gearbox can be replaced with a different type or upgraded to a pneumatic or electric actuator before shipment, based on the buyer's requirements.
Do you supply the larger diameters in the same series?
Yes. The DL3A001 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, medium, and operating pressure by WhatsApp or email, and our sales engineers will provide a quotation with confirmed specifications.
Get a Price for DL3A001 Lug Butterfly Valve Pin Type 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.