Metso GP500 Bowl Liner Concave

No. The casting geometry (profile, flange OD, height, bolt circle) is 100% IDENTICAL. The difference is exclusively the Locking Hardware Kit supplied with the liner: GP500 (Legacy): Locking Wedges + High-Tensile Bolts (Mechanical lock). GP500S (Current): Hydraulic Clamp Ring Segments + Bolts (Hydraulic lock). Ordering Protocol: Always specify "GP500 Mechanical Lock Kit" or "GP500S Hydraulic Clamp Kit". The liner casting is universal.

C (Coarse): ~3,600–3,800 kg (7,900–8,400 lbs) | M (Medium): ~3,300–3,500 kg | F (Fine): ~2,900–3,100 kg. LIFT PLANNING CRITICAL – ENGINEERED LIFT REQUIRED: This exceeds the capacity of 99% of standard plant overhead cranes (typically 10t–20t). Requires 35t–50t+ certified overhead crane OR 100t–130t mobile crane with engineered spreader beam. Verify rigging points (4x heavy lifting lugs standard). NW Rapid portable plants CANNOT change this liner onboard; requires heavy mobile crane on prepared pad. Plan 6–8 hour crane window minimum.

The GP500 has the largest annular backing gap in the Metso cone portfolio. You need 130 – 180 liters (34 – 48 gallons) of two-component epoxy backing (Metso KrushMore, ESCOBACK 6000, Copps K-Back). Order a dedicated "GP500 Bowl Liner Backing Kit" (typically 6–8 x 25L pails). Pro Tip: This volume generates massive exothermic heat. Pre-heat pails to 25–30°C; pour in 2–3 staged lifts (layers) with 30–45 min intervals to control peak temp (< 90°C) and prevent thermal shock cracking on the adjustment ring seat. Monitor with IR gun.

In SABC circuits or hard ore secondary (BIF, Granite, Quartzite), the GP500 processes high-energy, work-hardened (350-450+ BHN), high-silica/abrasive feed. The combination of high impact at the feed eye + severe sliding compression in the long parallel zone destroys standard Mn18Cr2 via micro-gouging, work-hardening fatigue, and "hourglass" profile loss. TiC Composite provides instant 550–600 BHN hardness via in-situ TiC carbides, resisting both gouging (upper chamber) and sliding wear (parallel zone). Typical life uplift: 2.5x–3.5x, turning a 3–4 week liner into a 10–14 week campaign on the circuit constraint crusher.

GP500 (Mechanical Wedges - EXTREME SEQUENCE CRITICAL): Seat liner, verify 360° flange contact (feeler gauge < 0.05mm) – Use jacking screws to align if needed. Install all wedges/bolts Hand Tight. Torque in 4 Passes (Star/Criss-Cross Pattern): 25% → 50% → 75% → 100% Spec (Typ. M48/M52 10.9/12.9 ~ 4,500–6,500 Nm - Verify Manual Spec). MANDATORY Re-torque at 2 Hours Operation (thermal expansion relaxes wedges significantly on this mass). Re-torque at 24 Hours. GP500S (Hydraulic Clamp Ring): Seat liner, install clamp segments/bolts hand tight. Pressurize hydraulic pump to Metso Spec Pressure (Typ. 200–250 bar / 2,900–3,600 psi). Torque mechanical lock bolts to spec. Verify "Zero Gap" between clamp ring & adjustment ring flange 360° (Feeler Gauge). Re-pressure check at 2 hrs / 24 hrs.

Absolutely not. Zero dimensional or geometric interchangeability. GP500: Steep cavity (~50-55°), constant long stroke, mechanical/hydraulic clamp lock, specific massive flange/bolt pattern. HP/MP Series: Shallower cavity, pivot point geometry, hydraulic lock bowl, different thread/flange/bolt circle. Attempting fitment destroys the adjustment ring, main frame, and creates immediate lethal safety hazards (ring bounce/ejection at 560kW).

Do not run to perforation. Change at FIRST limit (Matched Set Policy - Capital Asset Protection): Parallel Zone Thickness < 35–40 mm (1.4–1.6"). CSS Drift > 6–8 mm wider than target. Product Flakiness Index > 12–15% (loss of parallel zone). Throughput Drop > 12% (profile worn to "hourglass"). Visual: Feed lip cracking > 75mm deep; severe pitting/gouging in upper chamber; flange seat fretting. GOLDEN RULE: On GP500, ALWAYS change Bowl Liner & Mantle as a matched set. The steep cavity/long stroke amplifies "step wear" mismatch. Running new Bowl on worn Mantle (or vice versa) destroys the new liner in < 25% of normal life and induces uneven loading that cracks the Adjustment Ring (100k+).