High-performance butterfly valves are industrial valves that significantly improve the pressure resistance, sealing accuracy and adaptability of traditional butterfly valves through optimized structural design, sealing technology and driving mode. Its core characteristics and advantages are as follows:
1. Core structure upgrade
Triple eccentric design (core innovation)
Axis offset: The valve plate rotation center and the sealing surface center are offset to reduce friction and wear (disengagement at the moment of opening, and compression and sealing when closed);
Conical seal: The sealing surface is inclined to the conical axis to achieve zero leakage of line contact under high pressure (sealing pressure ≥ 15MPa);
Flow channel offset: The center of the valve body flow channel deviates from the valve stem axis to reduce the flow resistance coefficient (30% lower than that of traditional butterfly valves).
Strengthened sealing system
Metal hard seal: The valve seat and butterfly plate are welded with hard alloy (such as Stellite), with a temperature resistance of 600℃ and a pressure resistance of PN40 (Class 300Lb), suitable for high-temperature oil products and medium containing particles;
Soft seal optimization: PTFE/EPDM valve seat achieves bubble-level sealing (leakage rate ≤1×10⁻⁹mbar・L/s) under -40℃~120℃ working conditions.
2. Performance breakthroughs
Extreme working conditions adaptability
High temperature and high pressure: Metal seal type withstands 550℃/15MPa (such as catalytic cracking unit in refinery);
Ultra-low temperature: Austenitic stainless steel valve body is suitable for LNG liquid hydrogen transportation (-196℃);
Strong corrosion: Fluorine-lined valve body is resistant to acid and alkali media (pH 0~14).
Precise fluid control
High adjustment ratio: 100:1 flow adjustment range, linear relationship between opening and flow (error ±2%);
Fast response: Pneumatic actuators can open and close in seconds (≤10 seconds) and support emergency shut-off.
3. Technical integration and certification
Intelligent actuators
Dual-piston rack and pinion pneumatic device, supports positioner feedback of opening signal (4~20mA), and is connected to the DCS system for remote control;
The explosion-proof model is certified by ExdⅡCT6 and is used in flammable and explosive environments.
International standard adaptation
Complies with API 609 (design and manufacturing), ISO 5208 (leakage grade A), EN 593 (EU standards)
