Model PFM-SC-S Loss-In-Weight Feeder/Cable Suspension Scale

Volumetric Capacity: Up to 25 ft³/hr (0.70 m³/hr). Consult factory for higher feed rates.
Screw Sizes: range from 1.5 Ø. (variable pitch) to 2 Ø (variable pitch) solid flight or open helix with center through shaft.
Scale Type: "FMSS" Cable Scale System (dead load is mass-counterbalanced) and Model LC-137 weight resolver,.
Scale Capacity (live load): variable up to 500 lbs (227 kg).
Hopper Capacity: 3fT³ Multi-Shear hopper expandable to 9.75 fT³ with hopper extensions.
Automated Test Weight Lifter Assembly (ATWL): Used to automatically conduct a zero and span calibration.
Accuracy: 0.25% to 1% of set rate ±2 sigma based on a minimum sample of one (1) minute, 30 revolutions of the screw or 1% of scale capacity.

Features:

Accurately measures load regardless of load position.
Immune to support structure deflections and process vibrations.
Inherently self aligning to gravity.
Nulls out heavy tare loads.
1,000% over load capacity.
Scale may be suspended from above or supported below.
Immune to shock or impact loads.
Easily accessible load cell can be accessed without removing the feeder.

The THAYER Model PFM-SC-S is a large capacity Loss-In Weight-Feeder designed to assure accurate and uniform feeding of a wide range of materials, from free flowing to very fine cohesive powders.

Exclusive Powder Feeder Technology.

Patented U-trough feed chamber with independently driven agitator assures precise, reliable delivery of material to the feed screw. Eliminates material build-up, controls material aeration and delivers a steady constant flow of material.
Optional (patented) compound flight feed screw can be used with most materials to downwardly extend the operating range of the feeder by a factor of 10 (typically).
Fast and easy to clean.
The PF-LC-S is designed for fast, easy and thorough clean out. Feeder completely disassembles in less than one minute. High quality, rugged, stainless steel construction assures years of reliable, trouble free operation.
Patented "FMSS" (Force Measurement Suspension System) Cable Scale Technology.

The Thayer Cable Suspension Scale (patented) is the most rugged and forgiving Load Cell Weighing System available on the market. It can take more physical abuse and can tolerate more foundation distortion/deflection than all other known designs.

The exclusive Thayer Scale "FMSS" design provides extremely high sensitivity. Feeder dead load is mass-counterbalanced so that only material weight (live load) is measured. This feature helps assure excellent control in noisy environments. All of the articulate parts of the scale mechanism are supported from axially inextensible, but laterally yieldable suspension elements (stainless steel pre-stressed aircraft cable),
which are arranged to hang freely, thereby avoiding any appreciable spring or hysteresis effects, variations in mechanical advantage, or binding due to imperfect leveling.

Because of this unique mechanical property of the force transmission system, any laterally directed forces and shocks on the scale or its supported machinery can not cause destructive shear and bending stresses to develop in the elements themselves or at the load cell junction. The system, being yieldable in the lateral direction, is therefore effectively and completely protected by using laterally placed stops in proximity of the
weighed structure.

Weight loss is measured by a highly accurate, very sensitive, high output electronic force measurement sensor. The Thayer Series LC-137 weight resolver is a force measuring device designed specifically for use with Thayer Scale weighing systems. It is a precision-built, heavy duty device designed for long term stability and accuracy under the most demanding applications. It is initially calibrated and installed by the factory and