Two rubber-covered stainless-steel drive rollers continuously rotate the test sieve stack.
#SILENT SIFTER ISO#
The ASTM or ISO test sieves are placed in the cabinet, then tilted back to the testing position using the side knob. Rotary sifters do not require the sieve stack to be clamped in place. A sieve stack is capable of reaching up to 26in (660mm) high, and it can include from six 12in diameter full-height sieves to twenty 8in diameter half-height sieves including a pan. Silent Sifters® can instantly convert between 8in, 12in, 200mm, or 300mm test sieve diameter size. The optimum size range of the Silent Sifter® is from 1in-No. State departments of transportation often prefer the rotary sifter for aggregate gradations. Time is shown on a large, bright 0.5in (126mm) LED display. The timer features a pause function so the test cycle can be postponed and resumed with no loss of test time. A safety interlock switch disables the sifter and resets the timer if the door is opened during testing.Ī digital countdown timer/controller precisely controls operation up to 99 minutes ☑ second. A dependable 1/4hp continuous-duty motor drives the system. Tapping hammer assemblies are 6061 aluminum alloy with Ultra High Molecular Weight (UHMW) Polyethylene heads. Bearing and rod safety covers further eliminate exposed moving parts below the cabinet for greater compliance with OSHA regulations.
Test sieves and drive mechanisms are enclosed by the cabinet to safeguard against injury. The cabinet sits atop a sturdy powder-coated stand constructed of heavy ASTM A513 steel tubing and rolls on 4in hard rubber locking swivel casters for easy mobility in the lab. The full-width cabinet door swings open fully on heavy-duty commercial grade hinges to permit easy loading and unloading of test sieves. The cabinet is a high-quality CNC machined MDF board, precisely fitted to confine and control airborne respirable quartz, silica, crystalline particles, and other nuisance dust to further protect personnel and permit easy cleanup. The tightly sealed cabinet uses sound-deadening materials and a proprietary design to limit noise during operation. Gilson's proprietary silencing technology has resulted in units with noise levels 7–18dB quieter than standard rotary sifters. They significantly reduce operational noise levels with no loss of particle sizing accuracy and performance. “F” suffix specifies models with 230V/50Hz voltage.Gilson Silent Sifters® are the newest laboratory sifter models that reflect today's emphasis on noise reduction and worker protections in the laboratory environment. The floor stand includes 4in hard rubber Locking Casters to keep units in place during testing. Heavy-duty, over-center lever latches pull doors tightly against case gaskets, ensuring a tight, dust-proof seal that enhances noise control. This Sifter uses advanced, soundproofing materials and techniques for models 16 to 18dB quieter than standard rotary sifters and 8-10dB quieter than our SS-21 Silent Sifter®. SS-22 Silent Sifter II ® is the newest and most unobtrusive member of the Gilson Rotary Sifter line. Floor stands feature Locking Swivel Casters for easy mobility in the lab. SS-21 Silent Sifter® exhibits noise levels 7-10dB lower than any other rotary sifter for enhanced worker protection. The system is driven by a dependable 1/4hp continuous-duty motor. Rugged painted case is dense, impact-resistant MDF board and is mounted on a sturdy, powder-coated ASTM A 513 heavy steel tubing stand.
Hammer assemblies are 6061 aluminum alloy with Ultra High Molecular Weight (UHMW) Polyethylene heads. The controller is simple to program and the large, bright 0.5in (126mm) LED display is easy to read. The digital countdown timer with large LED display precisely times operation up to 99 minutes at ☑ second. Pause function allows the cycle to be suspended and resumed with no loss of test time, and a five-second audible alarm sounds at completion of the interval. A drive roller system continuously rotates the sieve stack with particle separation assisted by tapping against the stack. Sieve stacks are simply placed inside and the cabinet is rotated back to the testing position using an ergonomic knob, no clamping is required. Sieve stack capacity ranges from six 12in diameter full-height sieves with pan, or up to twenty 8in diameter half-height sieves with pan.Įnclosed cabinets allow safe, dust-free operation.
Faster conversion from 8 to12in or 200 to 300mm diameter sieves, easier set up, and much quieter operation are all improvements over classic rotary sifters. These units are built by Gilson using better design and better materials to produce sound levels lower than any other rotary sifter available today.
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