Typical models: D341X, D71X. Mostly fitted with rubber or EPDM soft seat for water, HVAC and low‑temperature pipelines.
Working Pressure: 1.0 ~ 1.6 MPa
Working Temperature: -28℃ ~ 135℃
Connection Type: Wafer
Actuator: Manual Lever
D71X Manual Wafer Butterfly Valve
Working Pressure: 1.0 ~ 1.6 MPa
Working Temperature: -28℃ ~ 135℃ Connection Type: Wafer
Actuator: Worm Gear
D371X Gear-Operated Wafer Butterfly Valve
Working Pressure: 1.0 ~ 1.6 MPa
Working Temperature: -28℃ ~ 135℃ Connection Type: Wafer
Actuator: Pneumatic
D671X Pneumatic Wafer Butterfly Valve
Working Pressure: 1.0 ~ 1.6 MPa
Working Temperature: -28℃ ~ 135℃ Connection Type: Wafer
Actuator: Electric
D971X Electric Wafer Butterfly Valve
Typical models: D342H, D642X. Supports both soft and metal-to-metal sealing, suitable for medium-temperature flue gas and circulating water.
Working Pressure: 0.6 ~ 1.6 MPa
Working Temperature: -40℃ ~ 250℃ (Depends on sealing material)
Connection Type: Flanged RF
Actuator: Worm Gear
D342H Worm‑Gear Operated Double Eccentric Butterfly Valve
Working Pressure: 0.6 ~ 1.6 MPa
Working Temperature: -40℃ ~ 250℃ (Depends on sealing material)
Connection Type: Flanged RF
Actuator: Pneumatic
D642H Pneumatic‑Actuated Double Eccentric Butterfly Valve
Working Pressure: 0.6 ~ 1.6 MPa
Working Temperature: -40℃ ~ 250℃ (Depends on sealing material)
Connection Type: Flanged RF
Actuator: Electric
Electric‑Actuated Double Eccentric Butterfly Valve
Typical models: D343H, D943H. Adopts metal hard sealing, designed for high temperature, high pressure, steam and chemical working conditions.
Size Range: DN50 – DN3200 / NPS 2″ – 200″
Working Pressure: PN20 – PN420 / Class 150 – 2500
Operation: Worm Gear Manual / Pneumatic / Electric / Hydraulic
Application: Food, Pharma, Chemical, Petroleum, Power, Paper
D343H Triple Eccentric Hard-Seal Butterfly Valve (Flanged)
Size Range: DN80 – DN3200 / NPS 3″ – 200″
Working Pressure: PN20 – PN420 / Class 150 – 2500
Operation: Pneumatic Actuator (DA / Spring-Return)
Connection: Butt-Weld | Application: High-Pressure Steam / Hot Oil
D363H Triple Eccentric Hard-Seal Butterfly Valve
Type a short headline
| Feature | Centerline | Double Eccentric | Triple Eccentric |
|---|---|---|---|
| Seal Type | Soft (Rubber/PTFE) | Soft or Metal | Metal (Fire Safe) |
| Temperature Range | -28°C ~ 135°C | -29°C ~ 425°C | -196°C ~ 600°C |
| Pressure Rating | PN10 – PN16 | PN16 – PN25 | PN25 – PN40 |
| Leakage Class | Class VI (Zero) | Class V | Class V / API 598 |
| Fire Safe | No | Optional | Yes (API 607) |
| Disc Wear | High (rubbing) | Low (cam action) | Minimal (zero rubbing) |
| Best For | Water, HVAC, Air | Steam, Gas, Oil | Petrochemical, High Temp |
| Price Level | $ | $$ | $$$ |
Need A Non-Standard Configuration? We Build Those Too
Special connection types, non-standard pressure or temperature ratings, alternate body materials, and third-party certifications for your specific project — send us your working conditions and we’ll quote a custom-engineered trap.
Actuator Types
| Type | Operation | Speed | Best For |
|---|---|---|---|
| Manual Lever | Hand | Slow | Small bore, low frequency |
| Worm Gear | Hand wheel | Medium | DN200+, infrequent operation |
| Pneumatic | Compressed air | Fast | Automation, emergency shutdown |
| Electric | Motorized | Medium | Remote control, modulation |
| Hydraulic | Oil pressure | Fast | Large bore, high torque |
Body Materials
| Feature | Temp Range | Corrosion | Typical Use |
|---|---|---|---|
| Ductile Iron | -28°C ~ 135°C | Low | Water, HVAC |
| Cast Steel (WCB) | -29°C ~ 425°C | Medium | Steam, Oil, Gas |
| SS304 (CF8) | -196°C ~ 600°C | High | Food, Pharma, Chemical |
| SS316 (CF8M) | -196°C ~ 600°C | Very High | Seawater, Acid, Chloride |
| Duplex (CD3MN) | -50°C ~ 315°C | Extreme | Offshore, Sour Gas |
Size & Pressure Range
| DN (mm) | NPS (inch) | Centerline | Double Eccentric | Triple Eccentric | Max Pressure |
|---|---|---|---|---|---|
| DN50 | 2″ | ✅ | ✅ | ✅ | PN40 |
| DN80 | 3″ | ✅ | ✅ | ✅ | PN40 |
| DN100 | 4″ | ✅ | ✅ | ✅ | PN40 |
| DN150 | 6″ | ✅ | ✅ | ✅ | PN25 |
| DN200 | 8″ | ✅ | ✅ | ✅ | PN25 |
| DN250 | 10″ | ✅ | ✅ | ✅ | PN25 |
| DN300 | 12″ | ✅ | ✅ | ✅ | PN25 |
| DN350 | 14″ | ✅ | ✅ | ✅ | PN25 |
| DN400 | 16″ | ✅ | ✅ | ✅ | PN16 |
| DN500 | 20″ | ✅ | ✅ | ✅ | PN16 |
| DN600 | 24″ | ✅ | ✅ | ✅ | PN16 |
| DN700 | 28″ | ✅ | ✅ | — | PN10 |
| DN800 | 32″ | ✅ | ✅ | — | PN10 |
| DN900 | 36″ | ✅ | ✅ | — | PN10 |
| DN1000 | 40″ | ✅ | ✅ | — | PN10 |
| DN1200 | 48″ | ✅ | — | — | PN10 |
| DN1400 | 56″ | ✅ | — | — | PN6 |
| DN1600 | 64″ | ✅ | — | — | PN6 |
| DN1800 | 72″ | ✅ | — | — | PN6 |
| DN2000 | 80″ | ✅ | — | — | PN6 |
| DN2400 | 96″ | ✅ | — | — | PN6 |
| DN2800 | 1100″ | ✅ | — | — | PN4 |
| DN3200 | 128″ | ✅ | — | — | PN4 |