III. Product Features

• • Sharpened Gate for Uninterrupted Flow: The precision-ground, 15° tapered gate acts as a cutting blade, slicing through fibrous materials (e.g., paper pulp, sewage rags) and breaking up solid agglomerates. This eliminates clogging—a common issue with ball or butterfly valves in slurry applications—and ensures smooth operation even with high-solids media.
  • Corrosion Resistance: 304/316 stainless steel construction resists rust, chemical attack, and pitting from aggressive media such as saltwater, acidic wastewater, or mineral-laden slurries. The valve body undergoes passivation treatment to enhance the chromium oxide protective layer, extending service life in outdoor or humid environments.
  • Automated Electric Actuation: The multi-voltage electric actuator enables remote control and integration with SCADA systems, ideal for hard-to-reach locations (e.g., underground sewage pits) or large-scale industrial facilities requiring centralized operation. Position feedback provides real-time status monitoring, while manual override ensures operation during power outages.
  • Tight Sealing Under Variable Conditions: The resilient EPDM/PTFE primary seal conforms to surface irregularities, maintaining shutoff even with minor gate wear. Under high pressure or abrasive conditions, the metal backup seal engages to prevent leakage, ensuring safety in critical applications like chemical transfer.
  • Flanged Connection Reliability: Flanged ends distribute pressure evenly across the connection, reducing leakage risks compared to wafer-style valves in high-vibration environments. Compliance with ASME and GB standards simplifies retrofitting into existing pipelines without modifications.
  • Low Maintenance Design: The gate and seat surfaces are polished to minimize friction, reducing wear and extending service intervals. The actuator’s self-lubricating gears and sealed housing require no regular maintenance, while replaceable seals allow for easy repair without removing the valve from the pipeline.
  • Bubble-Tight Shutoff: The elastomeric primary seal achieves API 598 Class VI leakage rates (near-zero leakage) for clean liquids, transitioning to effective sealing for slurries as the gate cuts through media and compresses solids against the seat.1. Simple shape, super short structure length, save material, can greatly reduce the overall weight of pipeline system, wide application range.
    2. Occupy a small effective space, can effectively support the strength of the pipeline, can reduce the possibility of pipeline vibration.
    3. Austenitic stainless steel is selected for the gate, which greatly improves the corrosion resistance and can effectively
    prevent sealing leakage caused by the corrosion of the gate.
    4. The upper sealing packing adopts flexible PTFE, reliable sealing, light and flexible operation.
    5. The gate plate has the function of knife, which can effectively break all kinds of sundries in the medium.

IV. Manufacturing Process

• Material Selection and Testing: Stainless steel raw materials (304/316) undergo chemical composition analysis and mechanical testing (tensile strength, elongation) to verify compliance with ASTM A182 standards. Each batch is inspected for corrosion resistance via salt spray testing (500 hours for 316 grade).
• Precision Machining: The gate is CNC-machined to achieve a sharpened edge (±0.05mm tolerance) and smooth surface finish (Ra ≤1.6μm) to minimize friction and enhance cutting efficiency. Valve body internal surfaces are honed to remove burrs, preventing media buildup.
• Seal Integration: EPDM/PTFE seals are bonded to the seat groove using high-temperature adhesive, ensuring permanent attachment even with thermal cycling. The seals undergo compression testing to verify elasticity and resistance to media absorption.
• Actuator Calibration: Electric actuators are integrated with the valve stem, with gear trains adjusted for smooth operation. Position sensors are calibrated to ensure accurate feedback (±1% full scale), and torque limits are set to prevent overloading during jamming.
• Assembly and Quality Control: The gate is installed with guided bushings to ensure vertical alignment. Flange faces are machined to flatness (≤0.1mm/m) for proper gasket seating. Each valve undergoes:
  • Shell test: 1.5×nominal pressure (hydrostatic) to verify body integrity, with no visible leakage or deformation.
  • Seat test: 1.1×nominal pressure using water or air, ensuring leakage rates meet API 598 Class V standards.
  • Actuation test: Full open/close cycles to confirm smooth operation, with position indicator verification.