III. Features Description

• PTFE Seal Reliability: PTFE’s chemical inertness resists water, oil, and mild acids/alkalis, while its low friction coefficient reduces wear during operation. The seal is reinforced with flexible graphite to maintain elasticity at high temperatures (≤200℃), achieving ANSI/FCI Class IV leakage (≤0.1% of flow)—critical for preventing media loss in water treatment or food processing.
• Electric Actuation Precision: The electric actuator offers programmable control (on-off/regulating), with position feedback to ensure accurate flow adjustment. Intelligent models support remote monitoring and automatic calibration, reducing manual intervention in large-scale systems like power plant steam loops.
• Flange Connection Stability: Flange design distributes pressure evenly across the valve body, avoiding leakage in high-pressure (PN1.6MPa) applications. It complies with multiple standards (JIS/ASME/DIN), simplifying integration into global projects without rework.
• Durable Structural Design: One-piece stem and disc reduce torque requirements, while stainless steel composite bearings ensure smooth rotation. The valve body undergoes anti-corrosion treatment (painting for cast iron, passivation for stainless steel), extending service life in humid or industrial environments.
• Wide Compatibility: Adaptable to diverse media (water, steam, oil, gas) and temperatures, with material options (cast iron for general use, stainless steel for corrosive media) to match application needs—eliminating the need for multiple valve types in complex systems.

IV. Manufacturing Processes

• Material Preparation: Cast iron/WCB/stainless steel castings undergo ultrasonic testing to detect internal defects. PTFE sheets are inspected for uniformity (no cracks or impurities) to ensure sealing performance.
• Body & Disc Machining: CNC lathes precision-machine valve bodies and discs to tight tolerances (±0.05mm), ensuring concentric alignment of the disc with the flow path. Flange faces are finished to Ra ≤1.6μm for leak-tight gasket sealing.
• Seal Assembly: PTFE seals are molded to match the valve’s inner diameter, then bonded to the body with high-temperature adhesive. Flexible graphite is layered behind the PTFE to enhance compression and sealing under pressure.
• Actuator Integration: Electric actuators are mounted via ISO5211 flanges, with stem-coupling alignment calibrated to ±0.5° to avoid jamming. Actuators undergo 5,000+ cycle tests to verify travel accuracy and torque output.
• Testing:
  • Hydrostatic Test: Body tested at 2.4MPa (1.5×PN1.6) for 30 minutes; seat tested at 1.76MPa (1.1×PN1.6) with water to confirm no leakage.
  • Operation Test: Actuator tested for travel time (15/20/30S) and position accuracy (±1°) to ensure consistent performance.
  • High-Temp Test: Valve exposed to 200℃ for 2 hours, then operated to verify seal integrity and actuator functionality.