III. Features Description

• Sharp-Edged Gate Design: The gate features a precision-sharpened edge (angle ≤30°) that cuts through accumulated solids, sludge, or viscous media when closing—eliminating blockages that cause leakage in standard gate valves. This ensures reliable shut-off even in pipelines with semi-solid residues.
• Stainless Steel Corrosion Resistance: 304/316 stainless steel body and gate resist corrosion from water, mild chemicals, and humid environments, avoiding rust-related jamming. This is critical for wastewater treatment and chemical processing, where media may contain corrosive components.
• Elastic Seal Performance: The EPDM/PTFE seal forms a tight bond with the gate, preventing leakage of media with fine solids. The seal is recessed to avoid direct contact with abrasive particles, extending its service life by 50% compared to exposed seals.
• Compact Structure: The valve body has a streamlined design, requiring less installation space than globe valves. This is advantageous in industrial plants with limited pipeline clearance, such as mining slurry systems.
• Manual Operation Efficiency: The handwheel is paired with a worm gear reducer, reducing operating torque by 40% and enabling one-person operation of large-diameter valves (DN300). The stem’s clear lifting/lowering movement provides visual confirmation of valve position.

IV. Manufacturing Processes

• Material Preparation: Stainless steel plates undergo ultrasonic testing to detect internal defects. Chemical composition analysis verifies alloy content (Cr18-20% for 304; Cr16-18%, Mo2-3% for 316) to ensure corrosion resistance.
• Gate Sharpening: The gate edge is precision-ground using CNC grinders to achieve a sharp, uniform angle (tolerance ±1°). This ensures consistent cutting performance across the entire gate width.
• Body & Bonnet Machining: CNC lathes machine the valve body and bonnet to tight tolerances (±0.05mm), ensuring the gate moves smoothly without jamming. Flange faces are finished to Ra ≤1.6μm for leak-tight gasket sealing.
• Seal Assembly: The elastic seal (EPDM/PTFE) is vulcanized or bonded to the valve seat, with pressure testing (0.6MPa air) to verify adhesion. This prevents seal detachment under repeated gate movement.
• Testing:
  • Hydrostatic Test: Body tested at 1.5×rated pressure (2.4MPa for PN16) for 30 minutes; seat tested at 1.1×rated pressure (1.76MPa) with water to confirm no leakage.
  • Operation Test: 100+ open/close cycles to ensure smooth gate movement and no jamming, with special focus on cutting performance in slurry Mock test.
  • Corrosion Test: Stainless steel components undergo 48-hour salt spray testing to validate resistance to rust and oxidation.