Porta-Screen

The Porta-Screen is the accepted standard portable screen for field control of construction aggregates and for quality control in asphalt and ready mix plants.

Designed for best separation in the 2" (50.8mm) to No. 16 (1.18mm) range, it is also used with smaller meshes to No. 200 (75µm). Porta-Screens are useful for size separations of coal ores, and other materials.

Capacity depends on material, but ranges up to 60 lb. (27.3kg). Model PS-3 holds 5 individually-removable screen trays and pan. Model PS-4 holds seven trays and pan to permit 2 added mesh sizes per test. Vibration of both models is mechanically counterbalanced for smooth, stable operation; no mounting is required. The built-in digital timer shows remaining time at a glance, stops screen at zero, and resets for next test. Range is to 99 minutes, 59 seconds. Trays have 14x14" (356x356mm) screen area minus partial openings(mesh sizes No. 4 and larger have metal shields around edges to cover partial openings for accuracy of separations).

Porta-Screen models are designed for performance durability, yet are light enough to be portable. Trays are quickly secured for operation by dual hand clamp levers. When levers are released, trays are individually removable for convenient emptying, cleaning, and weighing operations. Trays with wire cloth in the No. 16 to No. 80 (1.00mm to 180µm) range have three added support ribs. No. 100 (150µm) and finer trays are supplied with back-up cloth support. Replaceable mesh is available in all sizes. Cloth #4 and larger is steel; finer mesh is brass or phosphor bronze. Trays measure 16.0x16.5x3.0" WxDxH (406x419x76mm).