| Design Basis | GB Standard |
|---|---|
| Design Standard | GB/T 12238 |
| Face to Face Dimension(Wafer connection) | GB/T 12221 |
| Connecting Flange Size | GB/T 12221 |
| Test & Inspection | JB/T 9092 |
| Name of Parts | Z | C | P |
|---|---|---|---|
| Seat | Rubber, PTFE | Rubber, PTFE | Rubber, PTFE |
| Taper Pin | 45 Steel | 45 Steel | Stainless Steel |
| Butterfly Plate | Ductile Iron (Hard Chrome Plating) | Simple Steel or Stainless Steel | Stainless Steel |
| Body | Grey Cast Iron | Carbon Steel | Stainless Steel |
| Screw | 35 Steel | Carbon Steel | Stainless Steel |
| Stem | 45 Steel | Stainless Steel | Stainless Steel |
| Key | 45 Steel | 45 Steel | Stainless Steel |
| Bushing | HT200 | Compound Bearing | Compound Bearing |
| O-Ring | Rubber, Viton | Rubber, Viton | Rubber, Viton |
| Pneumatic Device | AT Series, AW Series, BW Series | AT Series, AW Series, BW Series | AT Series, AW Series, BW Series |
| Location Indicator | Plastic | Plastic | Plastic |
| Model | ZTD67(4)1X(F, F4, J) |
|---|---|
| Bore | DN50~1200mm |
| Pressure | 0.6, 1.0, 1.6, 2.5MPa; 150Lb, 300Lb |
| Type of Connection | Wafer type connecting, Flange connecting |
| Dimension Standard | GB, American Standard |
| Body Material | Cast iron, Carbon steel (WCB), Stainless steel (CF8, CF8M) |
| Seat Material | X, PTFE |
| Mode of Action | Double-acting type / Single-acting type (spring reposition) of pneumatic actuator |
| Control | Switch type, Adjust type |
| Selection of Accessories | Solenoid valve, Locator, Limit switch, F.R.L Combination Unit, Manual Device |
| Model | ZTD97(4)1X(F, F4, J) |
|---|---|
| Bore | DN50~1200mm |
| Pressure | 0.6, 1.0, 1.6, 2.5MPa; 150Lb, 300Lb |
| Type of Connection | Wafer type connecting, Flange connecting |
| Dimension Standard | GB, American Standard |
| Body Material | Cast iron, Carbon steel (WCB), Stainless steel (CF8, CF8M) |
| Seat Material | X, PTFE |
| Mode of Action | Power on type, Power off type |
| Control | Switch type, Adjust type |
| Selection of Accessories | Stroke switch, Analog quantity feedback module, Electric control box |
| DN | L | L1 | L2 | H | H1 | D | D1 | n-Φd | Pneumatic Actuator Model | Electric Actuator Model |
|---|---|---|---|---|---|---|---|---|---|---|
| 50 | 43 | 169/169 | 84/84 | 269/281 | 68 | 52.9 | 120 | 4-Φ23 | AT063DR / AT075SC | ZT-05 |
| 65 | 46 | 169/201 | 84/98 | 283/303 | 75 | 64.5 | 136.2 | 4-Φ26.5 | AT063DR / AT075SC | ZT-05 |
| 80 | 49 | 169/209 | 84/108 | 289/309 | 93 | 78.8 | 160 | 8-Φ18 | AT075DR / AT083SC | ZT-10 |
| 100 | 52 | 201/242 | 98/120 | 320/338 | 104 | 104 | 185 | 4-Φ24.5 | AT075DR / AT092SC | ZT-10 |
| 125 | 56 | 209/275 | 108/132 | 351/366 | 118 | 123.3 | 215 | 4-Φ23 | AT083DR / AT105SC | ZT-10 |
| 150 | 56 | 275/332 | 132/148 | 380/405 | 133 | 155.6 | 238 | 4-Φ25 | AT105DR / AT125SC | ZT-20 |
| 200 | 60 | 332/385 | 148/165 | 435/477 | 165 | 202.5 | 295 | 4-Φ25 | AT125DR / AT140SC | ZT-50 |
| 250 | 68 | 385/450 | 165/188 | 509/552 | 197 | 250.5 | 357 | 4-Φ29 | AT140DR / AT160SC | ZT-100 |
| 300 | 78 | 450/507 | 188/215 | 597/622 | 224 | 301.6 | 407 | 4-Φ29 | AT160DR / AT190SC | ZT-100 |
| 350 | 78 | 507/562 | 215/235 | 653/688 | 267 | 333.3 | 467 | 4-Φ30 | AT190DR / AT210SC | ZT-200 |
| 400 | 102 | 507/646 | 215/272 | 720/787 | 309 | 389.6 | 515 | 4-Φ30 | AT190DR / AT240SC | ZT-200 |
| 450 | 114 | 562/646 | 235/272 | 772/858 | 328 | 440.51 | 565 | 4-Φ30 | AT210DR / AT240SC | ZT-200 |
| 500 | 127 | 646/722 | 272/305 | 867/1004 | 361 | 491.5 | 620 | 4-Φ33 | AT240DR / AT270SC | ZMQ-300 |
| 600 | 154 | 722/1700 | 305/- | 998/1220 | 459 | 592.5 | 725 | 4-Φ36 | AT270DR / AT350SC | ZMQ-400 |
| 700 | 165 | 1320/1970 | -/- | 1116/1282 | 520 | 695 | 840 | 4-Φ36 | AT350DR / AT400SC | ZDQ-600 |
| 800 | 190 | 1430/2700 | -/- | 1330/1007 | 591 | 794.7 | 950 | 4-Φ39 | AT400DR / AW35S | ZDQ-800 |
Step 1: Order and Design
Before production, the customer’s requirements such as size, pressure rating, flange standard, actuator type, and working conditions are confirmed.
For each air soft seal butterfly valve, engineers prepare drawings, check sealing structure, and confirm material selection for body, disc, stem, and seat to ensure the valve matches the application.
Step 2: Forging & Casting
The main pressure-bearing parts, such as the valve body and disc, are produced by casting or forging according to design requirements.
During this stage, the raw components of the air soft seal butterfly valve are formed with enough strength and dimensional allowance for later machining. After that, rough cleaning and surface inspection are carried out.
Step 3: Machining
All key parts are machined precisely, including body bore, disc outer diameter, stem hole, sealing position, and mounting connection dimensions.
For an air soft seal butterfly valve, machining accuracy is very important because it directly affects sealing performance, torque, and service life. After machining, all parts are checked for dimensional tolerance.
Step 4: Assembly
After all components pass inspection, assembly begins. The soft seat, disc, stem, bushings, pins, and pneumatic actuator are installed in sequence.
In the assembly of the air soft seal butterfly valve, special attention is paid to the alignment between disc and seat, as well as the correct installation of the air actuator to ensure smooth opening and closing.
Step 5: Testing & Quality Assurance
Each finished air soft seal butterfly valve must undergo pressure testing, sealing testing, actuator operation testing, and appearance inspection.
This step ensures there is no leakage, the opening and closing action is stable, and the valve meets quality standards before delivery.
Step 6: Painting and Finishing
After testing, the valve body surface is cleaned, painted, and marked. Nameplate, specification labels, and inspection records are prepared.
Finally, the valve is packed properly to prevent damage during transportation and to keep the product in good condition upon delivery.
The air soft seal butterfly valve, due to its excellent sealing performance, lightweight structure, convenient installation and maintenance, space-saving feature, rapid opening and closing, and precise flow regulation, has become an important equipment in industrial fluid control and is widely used in water treatment, chemical industry, HVAC (heating, ventilation, and air conditioning), and food and beverage industries. It adopts soft valve seat materials such as rubber or elastomers, which can achieve good sealing, prevent leakage, and maintain system pressure. At the same time, it has strong temperature resistance, pressure resistance, and corrosion resistance, long service life, and reliable operation. It can also be combined with manual, electric, or pneumatic actuators to achieve automatic control. Therefore, when selecting, it is necessary to make reasonable matching based on the medium, temperature, pressure, and working conditions requirements to better exert its advantages of high efficiency, durability, and stability.
These valves are widely used in:
Oil and Gas
Chemical Processing
Power Plants
Water Treatment
Metallurgy and Mining
Agriculture and Irrigation
Superior Quality
Our valves are manufactured using premium materials and undergo rigorous quality testing to ensure reliable performance in demanding industrial applications.
Advanced Technology
Equipped with state-of-the-art CNC machining centers and precision manufacturing equipment, we deliver valves with exceptional accuracy and consistency.
Competitive Pricing
Through optimized manufacturing processes and bulk material procurement, we offer high-quality valves at competitive prices without compromising on quality.
Expert Support
Our experienced technical team provides comprehensive support from product selection to after-sales service, ensuring optimal valve performance for your specific application.
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