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  • Slim concealed bottom pivot and floor spring in black, center‑pivot layout with narrow adjustable baseDiagram showing closing zones—85°–70° fixed, 70°–25° adjustable, 25°–0° adjustable—with hold positions at 0°, 90°, 180°, and 270°

    Concealed Bottom Pivot + Floor Spring Set | Center Pivot | 2D Adjustable Base | Hold at 0°/90°/180°/270° | 360° Max Opening | Up to 200 kg | APS2037

    • Material: hardened 45# steel main body
    • Geometry: center‑pivot placement; 2D adjustable base (radial + axial)
    • Operation: hold positions at 0°/90°/180°/270°; 360° maximum opening; low opening force; latching force at small angles
    • Closing control:
      • 85° → 70° fixed (non‑adjustable)
      • 70° → 25° adjustable (valve 1)
      • 25° → 0° adjustable (valve 2)
    • Door compatibility: double‑acting wood or metal doors; minimum door thickness ≥38 mm; door depth ≥34 mm
    • Capacities (by option): 150 kg/≤1000 mm (EN4) or 200 kg/≤1100 mm (EN5)
    • Dimensions (bottom unit): approx. 304 × 32 × 32 mm (L × H × W)
    • Durability: ≥200,000 cycles
    • Optional: adjustable top pivot + ceiling plate (304 stainless, Ø12 mm pin, lateral/diagonal micro‑adjustment)
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