Gilson Silent Sifter® II - SS-22

The Silent Sifter II is a high-capacity rotary/tapping sieve shaker designed for accurate, repeatable particle-size analysis while significantly reducing the noise and dust commonly associated with mechanical sieving. Accommodates both 8" and 12" test sieves, making it an excellent choice for aggregate, asphalt, soils, and other construction materials laboratories that want the proven performance of a rotary sifter in a quieter working environment.

Key Features

• Suitable for sieve-analysis procedures requiring rotary/tapping agitation with appropriate ASTM or ISO test sieves
• Operates 16–18 dB quieter than standard rotary sifters and 8–10 dB quieter than Gilson's SS-21 Silent Sifter
• Rotary motion continuously redistributes material while tapping hammers help particles pass through the sieve openings
• Quickly converts between 8", 12", 200 mm, and 300 mm diameter test sieves
• Accommodates sieve stacks up to 26" / 660 mm high
• Capacity ranges from six 12" full-height sieves to twenty 8" half-height sieves, including the pan
• Digital countdown timer provides precise test-cycle control and memory recall
• Heavy-duty over-center latch pulls the door tightly against the cabinet gasket for improved dust and noise containment
• Aluminum hammer assemblies use UHMW plastic heads to reduce tapping noise
• Sound-dampened enclosure reduces nuisance noise without sacrificing separation performance
• Safety interlock enhances operator protection
• Powder-coated floor stand
• 4" hard-rubber locking swivel casters provide mobility around the laboratory
• Available in 115V/60Hz and 230V/50Hz configurations 

Included Items

• Gilson Silent Sifter II
• Enclosed sound-dampening cabinet
• Powder-coated floor stand
• 4" hard-rubber locking swivel casters
• Digital timer/controller
• Rotary drive system
• Aluminum tapping-hammer assemblies with UHMW plastic heads

Test sieves and sieve pans are not included and should be selected separately for the material and test method being performed. Gilson also offers replacement hammer assemblies, hammer heads, timer/controller, bearing covers, and tapper caps.

Typical Applications

• Aggregate gradation testing
• Asphalt aggregate testing
• Concrete aggregate testing
• Soil particle-size analysis
• Mineral and geological material testing
• Quarry and aggregate producer QC
• DOT and commercial testing laboratories
• University and research laboratories
• High-volume laboratories where conventional sieve-shaker noise is a concern

Lab Manager's Tip

The Silent Sifter II is particularly valuable when sieve analysis is performed in the same laboratory where technicians are weighing samples, entering data, or conducting other tests. Its biggest advantage over a conventional rotary sifter is not a change in the actual sieving action—it maintains the proven rotary/tapping approach—but the substantial reduction in operating noise and improved dust containment. For a busy aggregate laboratory, that can make a noticeable difference in the overall working environment.

If noise isn't a major concern, HMA can also supply more economical rotary-sifter options. If reducing noise and dust while retaining high-capacity 8" and 12" sieve capability is the priority, the Rainhart Mary Ann or SH-6900 are better choices.

• User Manual