DF3A004 Concentric Flange Butterfly Valve Pin Type and Wormgear
DF3A004 is a concentric flanged butterfly valve with a pin-fixed disc and wormgear operation, designed for on-off and throttling service in water, low-pressure industrial, and heating systems. It connects to pipe flanges with bolts and features a quarter-turn wormgear for precise manual control, suitable for applications where space is limited and reliable sealing under repeated cycling is required.
| Model Code | DF3A004 |
|---|---|
| Product Type | Concentric Flange Butterfly Valve[Pin type 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 | DF3A004 |
| Valve Type | Concentric flanged butterfly valve with pin and wormgear |
| Connection | Flanged, bolted to pipe flanges |
| Operation | Quarter-turn, wormgear manual operation |
| Series | DF3A004 concentric 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
- Pin-fixed disc ensures consistent disc alignment and torque transfer during repeated open-close cycles
- Wormgear operation provides smooth, controlled quarter-turn motion with reduced operator effort
- Flanged connection allows secure attachment to existing pipe flanges without welding
- Compact design fits into tight spaces where gate valves or ball valves would not
- Bidirectional sealing with resilient seat allows installation in either direction
- Part of a valve programme certified to ISO 9001 and ISO 14001
Problems It Removes
- Disc misalignment and leakage after repeated cycling due to friction-only disc-to-stem connections
- High operator effort required for large-diameter valves without gear assistance
- Lack of standardised valve operation across different systems in a single plant
- Space constraints between flanges that prevent the use of longer valves like gate valves
- Need for a single supplier offering both small and large diameters within the same valve type
Where It Is Installed
- Isolation of branch lines in water distribution networks where space between flanges is limited
- Throttling control in low-pressure heating and cooling circuits in HVAC systems
- On-off service in petrochemical process lines handling non-corrosive fluids
- Valve integration in pump skids and control panels where manual operation with gear is preferred
- Replacement of older butterfly valves in retrofit projects requiring reliable quarter-turn operation
Buyers It Suits
- Water and wastewater utility engineers sourcing flanged butterfly valves for municipal systems
- HVAC contractors standardising on quarter-turn valves with gear operation for ease of maintenance
- Pump station operators needing reliable on-off valves with long service life under cycling
- Industrial plant maintenance teams replacing valves with consistent disc alignment and sealing
- EPC contractors sourcing valves for low- and medium-pressure systems across multiple project sites
How It Is Built
- Concentric flanged butterfly valve with pin-fixed disc
- Wormgear operation for quarter-turn control with reduced effort
- Flanged end connection compatible with standard pipe flanges
- Resilient seat for bidirectional sealing
- Quarter-turn stem suitable for manual, lever, or actuator integration
- 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 temperature of the service line
- Seat and disc variants follow the options available across the DF3A004 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 machined and assembled with pin fixation for torque transfer
- Seat fitted and closure member set for concentric travel and sealing
- Valve assembled and tested under pressure 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 testing on the assembled valve
- Wormgear operation 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
- Wormgear can be fitted with or without a handwheel depending on the application
- Flange drilling matched to the buyer's flange standard
- 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 with lever | The wormgear reduces operator effort and provides better control, especially on larger diameters |
|---|---|
| Gate valve with flanged ends | The gate valve offers a full bore but is longer, heavier, and requires more space between flanges |
| Lug type butterfly valve | The flanged version requires flanges on both sides; the lug type can be used for end-of-line service |
| Ball valve with flanged ends | The ball valve provides tighter sealing at higher pressure but costs more and requires more clearance for handle sweep |
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 inserting the valve between flanges
- Tighten the flange bolts evenly in a cross pattern to avoid misalignment
- After tightening, open the disc fully and confirm free quarter-turn travel through the wormgear
- 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 extended periods
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Preventing Seat Leakage in Butterfly Valves
Where butterfly valve seats actually fail and what to change in specification or installation.
DF3A004 Concentric Flange Butterfly Valve Pin Type and Wormgear FAQ
What size and pressure rating is DF3A004?
It 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?
No. A flanged butterfly valve requires pipe flanges on both sides for clamping. For end-of-line service, consider a lug type body instead.
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 the quotation and issue material certificates upon request.
Can it be supplied with a handwheel instead of a wormgear?
Yes. The wormgear can be fitted with or without a handwheel. The configuration is confirmed during the order process.
Do you supply the larger diameters in the same series?
Yes. The DF3A004 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 will reply with a quotation and confirmed specification sheet.
Get a Price for DF3A004 Concentric Flange Butterfly Valve Pin Type 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.