DWA113 Wafer Butterfly Valve with Pin PTFE Seat
DWA113 is a wafer type butterfly valve with a pin-fixed disc and PTFE seat, designed for on-off and throttling service in water, low-pressure industrial lines, and non-corrosive media. It clamps between two pipe flanges, requiring no additional flanges and offering a compact face-to-face length. The pin-fixed disc ensures consistent torque transfer and disc centring during repeated cycling, reducing the risk of leakage from disc drift.
| Model Code | DWA113 |
|---|---|
| Product Type | Wafer Butterfly Valve with Pin [PTFE seat] |
| Category | Wafer 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 | DWA113 |
| Valve Type | Wafer type butterfly valve with pin |
| Seat Material | PTFE |
| Connection | Wafer, clamped between pipe flanges |
| Operation | Quarter-turn, lever or actuator |
| Series | DWA wafer butterfly valve series |
What This Model Gives You
- Pin-fixed disc maintains disc alignment under repeated cycling, reducing wear and leakage risk
- PTFE seat provides reliable sealing in non-corrosive media and low to medium pressure service
- Wafer body clamps between existing flanges, eliminating the need for extra flange pairs
- Short face-to-face length saves space in tight installations like pump skids and control panels
- Quarter-turn operation allows quick visual confirmation of valve position
- Part of a valve programme certified to ISO 9001 and ISO 14001 with over 600 models available
Problems It Removes
- Disc drift in wafer valves with friction-fit stems causes leakage after repeated cycling
- Gate valves are too long and heavy for installations with minimal space between flanges
- Mixed valve types on a single project lead to inconsistent spare parts and maintenance complexity
- Buyers face long lead times when ordering small-diameter valves as non-standard items
- Lack of a single supplier for both small and large diameters in the same valve family
Where It Is Installed
- Isolation of branch lines in municipal water distribution systems where space is limited
- Throttling control in low-pressure cooling water circuits of industrial plants
- On-off service in HVAC systems with tight space between flanges
- Process line isolation in pharmaceutical and food processing plants using non-corrosive fluids
- Retrofitting into existing pipe runs where gate valves are too long or heavy
Buyers It Suits
- Water utility engineers sourcing compact isolation valves for municipal systems
- Plant maintenance teams replacing leaking butterfly valves with more durable pin-fixed designs
- HVAC contractors standardising on quarter-turn valves for quick installation
- EPC firms procuring valves across multiple projects with consistent dimensions and operation
- Distributors stocking a wafer butterfly range from DN10 upward with consistent performance
How It Is Built
- Wafer body clamped between two pipe flanges using through bolts
- Disc fixed to the stem with pins for direct torque transfer and centred positioning
- PTFE seat providing a tight, bidirectional seal in non-corrosive media
- Quarter-turn stem compatible with lever, gearbox, or actuator operation
- Part of the DWA wafer butterfly series 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 operating temperature
- PTFE seat is standard; other seat variants are available across the DWA 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 pinned as a matched assembly
- PTFE seat fitted and the closure member adjusted for centred travel
- Assembled valve cycled and pressure tested before packing
- Marked, wrapped, and crated for container shipment from Tianjin
How It Is Checked
- Dimensional check of body face-to-face length and flange bolt pattern 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
- PTFE seat variant selected based on the medium and temperature on the buyer's line
- Lever, gearbox, pneumatic or electric actuator fitted before shipment
- Flange drilling matched to the buyer's pipe standard
- 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
| Wafer butterfly valve with friction-fit disc | The pin-fixed disc transfers torque more directly and resists disc drift under cycling |
|---|---|
| Lug type butterfly valve | The lug body allows end-of-line service; the wafer body requires flanges on both sides |
| Resilient seated gate valve | The gate valve offers full bore but is longer and heavier for the same duty |
| Ball valve at DN50 | A 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
- Leave the disc slightly open while inserting the valve between flanges to avoid seat damage
- Tighten the through bolts evenly in a cross pattern to ensure the body seats squarely
- Open the disc fully after bolting and confirm free quarter-turn travel
- Do not use the wafer 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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Sectioning valves non-return protection and joints for distribution mains pumping stations and treatment works.
Heat Supply
District heating primary and secondary circuit isolation balancing and expansion.
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.
Installing a Wafer Butterfly Valve Between Flanges
The installation sequence that avoids seat damage, disc fouling and leaking joints on first pressure test.
DWA113 Wafer Butterfly Valve with Pin PTFE Seat FAQ
What size and pressure rating is DWA113?
It is a wafer type butterfly valve with pin and PTFE seat. The nominal diameter and pressure rating are confirmed on request based on the buyer's line data, as the same body is offered in multiple variants.
Can this valve be used at the end of a pipe run?
No. A wafer body requires flanges on both sides to clamp against. For end-of-line service, request the 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 quoting and issue material certificates upon request.
Can it be supplied with an actuator instead of a lever?
Yes. The stem accepts a lever, gearbox, pneumatic, or electric actuator. The valve is assembled and tested with the actuator fitted before shipment.
Do you supply the larger diameters in the same series?
Yes. The DWA wafer butterfly series continues through the larger nominal diameters, covering 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 DWA113 Wafer Butterfly Valve with Pin PTFE Seat
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.