Hard seal butterfly valve

Product Overview

Key Features

1. Core Pneumatic Actuation System, Precise Automatic Control

   The product fully focuses on the core drive demand of pneumatic actuation, optimized for stainless steel butterfly valve working conditions with full adaptability:

   1. Full type coverage: Standard equipped with AT/GT series rack and pinion quarter-turn pneumatic actuators, full coverage of double acting (DA) / single acting spring return (SR, Fail Open / Fail Close, fail-safe type), suitable for 0.4-0.8MPa industrial clean compressed air, the fastest switching time is 0.5 seconds, perfectly suitable for frequent opening and closing and emergency shut-off working conditions;
      

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   2. Full control accessory adaptation: Standard equipped with NAMUR standard mounting interface, which can be seamlessly matched with explosion-proof solenoid valve, limit switch box, valve positioner, air filter regulator, emergency handwheel mechanism, realizing remote on-off control and 4-20mA analog flow proportional regulation, perfectly adapting to various industrial automatic control systems;
      

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   3. High protection & explosion-proof adaptation: Standard IP67 protection grade, optional IP68 waterproof and dustproof grade, ExdⅡBT4/CT4 explosion-proof grade, perfectly suitable for harsh industrial working conditions such as humid, dusty, flammable and explosive scenarios; built-in mechanical + electrical double limit, ±4° precise fine adjustment can be realized at 0° and 90° to ensure the switch is in place without over-travel, with accurate positioning without deviation;
      

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   4. Emergency operation guarantee: Optional manual handwheel is available, which can manually open and close the valve under air failure, signal interruption and equipment failure conditions, ensuring the safety of emergency pipeline operation.
      

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2. Full Stainless Steel Body, Strong Corrosion Resistance, Sanitary & Environmental Protection

   The product fully focuses on the core material advantage of stainless steel, tailor-made for anti-corrosion and sanitary working conditions:

   1. All wetted parts such as valve body, disc, stem and fasteners are integrally precision cast/forged from 304(CF8), 316(CF8M), 316L(CF3M) food-grade stainless steel, with dense material without sand holes and blowholes, excellent rust resistance, acid and alkali resistance, chloride ion corrosion resistance, and service life is much longer than valves made of ordinary materials such as cast iron, carbon steel and brass. Duplex steel material can be customized for highly corrosive chemical working conditions;
      

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   2. The inner wall of the flow channel is mirror polished, no dead angle, no medium retention, no scaling, no heavy metal precipitation, no harmful substance release, fully complying with GB 5749 drinking water sanitary standard and FDA food-grade certification requirements, perfectly suitable for sanitary working conditions such as drinking water, food and beverage, pharmaceutical aseptic workshops.

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3. Dual Connection Options, Easy Installation & Strong Versatility

   Full coverage of wafer type and flanged type connection methods: The wafer type adopts ultra-thin valve body design with extremely short overall length and light weight, which greatly reduces the axial installation space, and is perfectly suitable for narrow spaces and dense pipeline scenarios; the flanged type strictly complies with the world’s mainstream flange standards such as GB, ANSI, JIS and DIN, and can be directly and seamlessly connected with pipelines of the same standard without modification and adaptation. Both connection methods do not require hot work welding, can be disassembled and assembled by a single person without disassembling the pipelines at both ends, greatly reducing on-site construction and later maintenance costs.

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4. Full Coverage of Multiple Sealing Solutions, Zero Leakage Adaptation for Full Working Conditions

   Provide exclusive sealing solutions for different working conditions, covering most application scenarios:

   1. Soft seal type (standard): Adopt food-grade EPDM/silicone/PTFE seat, which is precisely fitted with stainless steel disc, the sealing grade reaches ANSI B16.104 Class VI bidirectional zero leakage, with small opening and closing torque, aging resistance and corrosion resistance, no sanitary dead angle, suitable for normal temperature clean media and sanitary working conditions, the maximum applicable temperature is 180℃;
      

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   2. Hard seal type (optional): Adopt triple offset metal hard seal structure, the sealing surface of the seat and disc is overlaid with Stellite hard alloy, high temperature resistance, erosion resistance and anti-seizure, suitable for harsh working conditions such as high temperature steam ≤425℃ and media with trace particles, completely solving the pain points of soft seal such as easy aging and non-high temperature resistance.

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1. Multiple Safety Structures, Industrial-Grade Stable & Durable

   The full series is equipped with industrial-grade safety protection as standard: anti-static structure, bottom-mounted T-type blow-out proof stem, multiple flexible graphite/PTFE packing seals, API 607 fire-safe structure, which fully eliminates potential safety hazards such as electrostatic explosion, stem ejection and medium leakage. It reserves ISO 5211 standard mounting pad, with convenient actuator disassembly and assembly, and strong versatility. It is stable and reliable for long-term operation, with extremely low operation and maintenance cost in the whole life cycle.

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Applications

Product Summary