Metso GP220 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: GP220 (Legacy): Locking Wedges + High-Tensile Bolts (Mechanical lock). GP220S (Current): Hydraulic Clamp Ring Segments + Bolts (Hydraulic lock). Ordering Protocol: Always specify "GP220 Mechanical Lock Kit" or "GP220S Hydraulic Clamp Kit". The liner casting is universal.

C (Coarse): ~1,500–1,550 kg (3,300–3,400 lbs) | M (Medium): ~1,350–1,400 kg | F (Fine): ~1,200–1,250 kg | EF (Extra Fine): ~1,100–1,150 kg. LIFT PLANNING: This exceeds the capacity of standard 10t overhead cranes found on many older plants. Verify 15t–20t+ certified crane/hoist availability before scheduling shutdown. NW Rapid portable plants require external mobile crane for bowl liner changes.

The GP220 has a large annular gap. You need 55 – 85 liters (14 – 22 gallons) of two-component epoxy backing (Metso KrushMore, ESCOBACK 6000, Copps K-Back). Order a dedicated "GP220 Bowl Liner Backing Kit" (typically 3–4 x 25L pails). Pro Tip: Pre-heat pails to 25–30°C (77–86°F) for viscosity control; pour continuously to avoid cold joints on this volume.

In SABC circuits, the GP220 processes high-pressure, work-hardened, high-silica (60%+) SAG pebbles. The sliding abrasion in the parallel zone + impact at the feed eye destroys standard Mn18Cr2 via micro-gouging and work-hardening fatigue. TiC Composite provides instant 550–600 BHN hardness via in-situ TiC carbides, resisting both gouging (feed eye) 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.

Absolutely not. Zero dimensional or geometric interchangeability. GP220: Steep cavity (~50-55°), constant long stroke, mechanical/hydraulic clamp lock, specific flange/bolt pattern. HP Series: Shallower cavity, pivot point geometry, hydraulic lock bowl, different thread/flange. Attempting fitment destroys the adjustment ring, frame, and creates immediate safety hazards (ring bounce/ejection).

GP220 (Mechanical Wedges - CRITICAL SEQUENCE): Seat liner, verify 360° flange contact (feeler gauge). Install all wedges/bolts Hand Tight. Torque in 3 Passes (Star/Criss-Cross Pattern): 30% → 60% → 100% Spec (Typ. M36 10.9/12.9 ~ 1,800–2,200 Nm). MANDATORY Re-torque at 2 Hours Operation (thermal expansion relaxes wedges). Re-torque at 24 Hours. GP220S (Hydraulic Clamp Ring): Seat liner, install clamp segments/bolts hand tight. Pressurize hydraulic pump to Metso Spec Pressure (Typ. 150–200 bar / 2,175–2,900 psi). Torque mechanical lock bolts to spec. Verify "Zero Gap" between clamp ring & adjustment ring flange 360°. Re-pressure check at 2 hrs / 24 hrs.

Do not run to perforation. Change at FIRST limit (Matched Set Policy): Parallel Zone Thickness < 25–30 mm (1.0–1.25"). CSS Drift > 4–5 mm wider than target. Product Flakiness Index > 12–15% (loss of parallel zone). Throughput Drop > 12% (profile worn to "hourglass"). Visual: Feed lip cracking > 50mm deep; severe pitting/gouging in upper chamber. GOLDEN RULE: On GP220, 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 < 40% of normal life and risks adjustment ring damage from uneven loading.