Understanding Deister Table Models

Deister concentrating tables are available in three primary configurations: the 999/99/6, the 14, and the 15-S. Each is designed for a different throughput requirement and application scale. Understanding the differences helps you select the right table for your operation from the start.

The Three Models at a Glance

Model	Type	Relative Size	Best For
999/99/6	Suspended or floor-mounted	Large	High-throughput production operations
14	Suspended or floor-mounted	Medium	Mid-scale production and processing
15-S	Suspended or floor-mounted	Small	Pilot testing, low-volume, or space-constrained applications

Capacity by Feed Type (U.S. System — STPH per deck)

Feed Type	Particle Top Size	999/99/6	14	15-S
Coarse Sand	10 mesh	2.5	1.25	0.125
Medium Sand	48 mesh	1.5	0.75	0.075
Fine Sand	100 mesh	1.0	0.50	0.050
Slime	325 mesh	0.5	0.25	0.025

Capacity for cleaner feeds is generally 50% less than for rougher feeds.

Capacity by Feed Type (Metric System — MTPH per deck)

Feed Type	Particle Top Size	999/99/6	14	15-S
Coarse Sand	2.0 mm	2.3	1.15	0.115
Medium Sand	0.30 mm	1.4	0.70	0.070
Fine Sand	0.15 mm	0.9	0.45	0.045
Slime	0.044 mm	0.4	0.20	0.020

What the Capacity Figures Mean

Across all three models, capacity decreases as particle size decreases. This is consistent across every model. The 999/99/6 handles more tonnage than the 14, and the 14 handles more than the 15-S, but all three follow the same performance curve as feed gets finer.

The 999/99/6 are the largest and highest-capacity models, and therefore the standard choice for production-scale mineral processing and metal scrap operations processing significant daily tonnage.

The 14 is a mid-size model suited to moderate throughput requirements. It follows the same separation principles as the 999/99/6 at roughly half the capacity per deck.

The 15-S is the smallest model — roughly one-twentieth the capacity of the 999/99/6, or about one-tenth that of the 14. It is well suited to pilot testing of new feed materials, small-scale production, or installations where floor space or feed volume limits the use of a larger table.

Operating Parameters (All Models)

All three models operate on the same stroke speed and stroke length settings by feed type. The difference between them is deck size and capacity, not operating principle.

Feed Type	Strokes/Min	Stroke (in)	Stroke (mm)
Coarse Sand	260–265	0.75	19
Medium Sand	265–270	0.75	19
Fine Sand	270–275	0.50	13
Slime	275–280	0.50	13

Dressing Water Requirements per Deck

Water requirements scale proportionally with deck size. The 15-S requires significantly less water, which is an important consideration for pilot or low-volume installations where water management infrastructure is limited.

Feed Type	999/99/6 (GPM)	14 (GPM)	15-S (GPM)
Coarse Sand	10–16	5–8	0.5–0.8
Medium Sand	8–12	4–6	0.4–0.6
Fine Sand	5–9	3–5	0.3–0.5
Slime	3–5	2–4	0.2–0.4

Choosing the Right Model

The right model depends on three factors: your required throughput, your feed particle size, and your available floor space and water supply.

For most production-scale metal scrap and mineral processing operations, the 999/99/6 is the appropriate starting point.

For pilot testing a new feed material or evaluating a new application before committing to full-scale equipment, the 15-S allows you to confirm separation performance at low cost and low commitment.

The 14 fills the gap between the two and is the right choice when the 999/99/6 exceeds your throughput requirement, but the 15-S is too small for your production needs.

If you are unsure which model is right for your application, the answer starts with a sample test. Contact Deister Concentrator to discuss your feed material, throughput requirement, and plant constraints, and we will advise on the right configuration from there.