KF70D
Pneumatic Three-seal Eccentric Hard-sealing Butterfly Valve
Design Features
The core advantage of the pneumatic triple-eccentric hardened sealing butterfly valve lies in enhancing industry standards for high-performance butterfly valves through enhanced sealing performance and extended service life. Its triple-eccentric structure eliminates frictional wear, reducing torque by 40% compared to double-eccentric butterfly valves. The hardened sealing achieves ANSI Class VI virtually zero leakage and withstands temperatures up to 600°C. The pneumatic drive delivers a rapid response time of 0.5–3 seconds with excellent explosion-proof capability, positioning it as the optimal solution for replacing gate and globe valves in ultra-demanding applications across power plants, petrochemicals, and marine environments.
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| Product Name |
Pneumatic Three-seal Eccentric Hard-sealing Butterfly Valve |
| Product Model |
KF70D |
| Nominal Diameter(DN) | NPS 2" ~120" (DN50~DN3000) |
| Nominal Pressure(PN) | Class150 ~Class1500 (PN16~PN250) |
| Valve Body Material | Carbon Steel (A)、304 Stainless Steel (S)、316 Stainless Steel (L) |
| Sealing Material | Polytetrafluoroethylene、Metal Hard Seal、Tungsten Carbide |
| Leakage Class | ANSI Class Ⅵ |
| Media Temperature | -120℃~420℃ |
| Connection Type | Welding (2)、Clamp Connection(3)、Flange Connection (4) |
| Trim Type |
Triple-Eccentric Hard-Sealed Butterfly Valve (D) |
| Control Accuracy | ±0.1% |
| Actuation Type | Pneumatic Diaphragm Actuator |
| Supply Pressure | 400-800kpa |
| Air Supply Port | G1/4"、G1/8"、G3/8"、G1/2" |
| Pneumatic Actuator | optional |
| Operation Mode | On-Off Type (Two-Position Control)、Modulating Type (4-20mA Control) |
| Single-Acting Actuator | Air-to-Close (Type B) -- Fail Open (FO)、Air-to-Open (Type K) -- Fail Closed (FC) |
| Double-Acting Actuator | Air-to-Close (Type B) -- Fail Last (FL)、Air-to-Open (Type K) -- Fail Last (FL) |
| Optional Accessories | Positioner、Air Filter Regulator、Position Retention Valve、Limit Switch、Position Transmitter、Handwheel and more |
| Stroke (°) | 0°--90° |
| Remarks | Other special sealing materials or special temperature requirements can also be designed and selected according to customer specifications. |
