For dry aggregate classification (limestone, granite, basalt) at apertures above 10 mm in normal operating conditions, welded wire panels offer accurate aperture and good open area. For wet screening, fine apertures (below 10 mm), or feeds with high clay content where blinding is a persistent problem, polyurethane panels are the standard recommendation - their flexibility prevents particle lodging and self-clears under vibration. For coarse primary screening at apertures above 40 mm with high-impact feed (e.g., ROM ore, demolition concrete), manganese steel wire offers the required impact resistance at low cost. We will specify the correct type at quotation stage based on your feed data.

Q235 is a general structural steel with a yield strength of 235 MPa and relatively low notch toughness. Under the high-cycle fatigue loading of a vibrating screen (typically 800–900 vibrations per minute, 24 hours per day), Q235 side plates are prone to progressive crack propagation from weld toes and bolt holes - the dominant failure mode causing side-plate splitting in the field. Q345R has a 47% higher yield strength and, more importantly, significantly higher Charpy impact toughness, which resists crack initiation and slows propagation even at stress concentrations. The material premium is small relative to the extended plate life and reduced unplanned-downtime cost.

The 2YK prefix denotes a two-deck (two-layer) screen producing three fractions (oversize, mid-size, and undersize); 3YK denotes a three-deck screen producing four fractions. Choose three decks when the process requires simultaneous separation at three cut points - for example, producing 0–5 mm, 5–20 mm, 20–40 mm, and +40 mm fractions from a single machine. Two decks are sufficient when only two cut points are needed, and the lighter two-deck box reduces the structural and foundation loads for a given screen width.

Yes, with appropriate installation angle and trough lining. For materials with moisture content above 8–10% or with cohesive properties (fine limestone, moist coal, clay-bearing ore), specify a downward installation slope of 5–10° and a smooth-surface trough lining - either polished stainless steel or polyurethane - to minimize adhesion. For extremely cohesive materials above 15% moisture, combine the SP with an air-knife or vibrating-pad anti-build-up system on the trough underside.

Feed rate is adjusted by changing the vibration amplitude via the excitation mass setting on the vibration motors. Most SP motor configurations allow the eccentric mass position to be adjusted in discrete steps at the motor end, increasing or decreasing the resultant force and therefore the trough amplitude. For continuous variable control - required in automatic proportioning systems - a variable-frequency drive (VFD) on the motor supply adjusts motor speed, which directly and linearly controls amplitude and feed rate. VFD control is available as an option on all SP models.

For batching, proportioning, and automatic-control applications, horizontal installation (0°) is recommended to ensure uniform, gravity-independent feed rate and to prevent uncontrolled material flow when the motors are stopped. For general continuous feeding applications where a slight gravity assist is acceptable, a downward slope of up to 5–8° increases conveying velocity and is preferred for dry, free-flowing materials. For sticky or high-moisture materials, a downward slope of 5–10° is recommended to assist discharge and prevent build-up on the trough floor.

The exciter shaft bearings are grease-lubricated via external nipples and require re-greasing every 200–300 operating hours under normal conditions - more frequently in high-dust or high-temperature environments. We recommend using a lithium-complex grease with an NLGI Grade 2–3 rating and an operating temperature range above 120°C. Full bearing replacement intervals depend on load and duty but are typically 8,000–12,000 hours in primary crushing applications.

Yes. The ZSW series is rated for installation slopes of 0° to 5° (downward toward discharge). A 0° slope is suitable for most standard installations where the primary crusher is at grade. A slight positive slope (2–5°) increases the conveying velocity and is preferred for high-moisture, sticky feeds that resist gravity-assisted movement on a flat trough. For installations where the crusher feed opening is at a height that requires an upward slope, a belt feeder should be specified instead.