POWDER AND GRANULE SAMPLERS ON GRAVITY CHUTE

Sampling from pipes, belts, screw conveyors and other gravity chutes.

Rotary traverse sampler

This equipment can be used to take representative samples.

Samples of agglomerates, aggregates, powders, granules or liquids in gravity flow.

Various models are available, to suit flow cross-sections from DN 20 to DN 500.

Principle

A trough, moving in a circular motion at a constant speed of 0.6 m/s, passes under the product flow to collect a sample uniformly over the entire cross-section.

The cross-section of the trough is radial, and its angle can vary depending on the size of the product to be picked, the flow rate and the quantity required for each pass.

How it works

A control panel is used to run a sampling cycle (which may include one or more passes under the flow). The equipment can be used to programme and count samples at regular or variable intervals.

This equipment enables representative samples to be taken.

Equipment

All parts in contact with the products are made of 304 L stainless steel (316 L on request).

The drive is provided by a geared motor, 220 V single-phase or three-phase, 380 V three-phase.

The complex can be adapted to meet specific operating conditions.

Cross sampler on conveyor belt

Sampling of agglomerates, aggregates, powders, granules and forestry chips at the belt jetty. Designed for use under piers up to 3 metres wide. This equipment enables representative samples to be taken.
Préleveur traversier sur bande transporteuse

Principle

A mobile trough moves at a set speed under the full width of the product throw and evacuates the captured sample:

  • Either continuously in a refocusing sampling hopper.
  • Or at the end of the stroke, when the trough is capable of receiving the entire sample before being emptied.

Each sample is proportional to the flow rate.

The opening of the trough and its speed of passage under the sample flow are determined as required.

How it works

A control panel is used to run a sampling cycle (which may include one or more passes under the flow). The equipment can be used to programme and count samples at regular or variable intervals.

This equipment enables representative samples to be taken.

Equipment

All components are made from materials suitable for the product to be sampled, such as steel or stainless steel. The design is particularly robust. System dimensions and configuration depend on plant layout

Rotary arm sampler

Removal of chips, pellets or other materials during the emptying of the moving floor lorry.

Sampler adaptable to a gravity chute for powder or granules

Staff safety during the operation.

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Principle

A mobile trough of a size adapted to the desired quantity is fixed to the end of a rotating arm. The sample is taken at the end of a conveyor belt. The trough is positioned under the product flow and then emptied into a recovery tank for the accumulated samples. Equipment can be adapted to suit conditions of use

How it works

An electrical control box equipped with a touch-sensitive display and a PLC enables :

  • Ensure and secure the operating cycle.
  • Set the number of sampling cycles.
  • Set the sampling frequency.

Equipment

All components are made from materials suited to the product and operating conditions (generally painted steel).

Pendulum traverse sampler

Powder and granule sampling on gravity flow circuits.

Principle

A mobile trough with a specific opening, driven by a sectorial radiating movement, travels at a specific speed.

Each time it passes, it collects and discharges an « elementary » sample.

Each sample is proportional:

  • Instantaneous circuit flow.
  • At the trough opening.
  • At the speed of passage under the flux.

Each levy is proportional:

  • The flow rate, the opening of the trough and its speed of passage under the flow.

How it works

An electrical control box equipped with a touch-sensitive display and a PLC enables :

  • Ensure and secure the operating cycle.
  • Adjust the speed of passage under the flux.
  • Set the sampling frequency.

Additional functions, such as pot presence and sample weighing, can be combined.

Material

All components are made of materials suited to the product and operating conditions (usually stainless steel), and are particularly robust.

The piston sampler

Powders, granules, agglomerates… At rest, the sampling system has no influence on product flow. There is a seal between the sampler and the enclosure.

Principle

A spoon piston is inserted under the product flow for the time required for loading. When the scoop is full, the piston returns to its position above the sample hopper. The piston then rotates through 180° to drain the product. If necessary, a metered gas injection facilitates evacuation. Rotation movements are transmitted by pneumatic cylinders.

How it works

An electro-pneumatic or pneumatic control box is used to set the muscular or automatic (programmed) sampling cycle, and provides the safety features required for operating conditions.

Equipment

Sealing systems ensure that the spoon piston is sealed and scraped. All parts in contact with the product are made of stainless steel, plastic or PTFE. Standard cylinder (light alloy), seals (Nitrile, Viton, PTFE). The whole unit is encased in stainless steel