Gravimetric feeder VFD 100

pistonvacuumvibrating

Overview
This compact, functional unit enables the precise weighing and dosing of powders, granulates and other free‑flowing bulk materials. The modular design allows straightforward integration into process plants and combination with vacuum conveying systems, delivering gram‑level dosing accuracy using a loss‑in‑weight (LIW) concept.

Key features

• Precise weighing and dosing of powders, granulates and other free‑flowing bulk materials (accuracy: typically a few grams).
• Integrated buffer container with vibratory conveyor for continuous extraction and dosing.
• Continuous net weight measurement by integrated load cell using the loss‑in‑weight principle.
• Electrical vibratory drive with continuously adjustable conveying capacity; suitable for start‑stop operation without overrun; energy‑efficient and quiet operation.
• Modular, easy‑to‑dismantle design for cleaning; gentle material handling.
• Conveyor chute/pipe available in various lengths and in AISI 304 or AISI 316 stainless steel.
• Clamp connections and FDA‑approved elastic compensators at inlet and outlet.
• Optional PLC for processing load cell signals and controlling dosing; can be integrated into an existing plant PLC.
• Suitable for ATEX / explosive area installations.

How it works

• The load cell continuously measures the net weight of material in the buffer container and vibratory feeder; the control system adjusts dosing according to the LIW principle.
• For large volumes, dosing is paused to refill the buffer container; the total dose is the sum of individual cycles.
• Powder or bulk material can be fed into the buffer container from another vessel or via vacuum conveying; the vibratory feeder continuously extracts material and transfers it to the downstream station (e.g. mixer).

Typical components / hotspots

• Buffer vessel (buffer container)
• Piston vibrator
• Disc valve
• Choke pipe
• Support rack
• Chute (conveyor chute / closed feeding chute)
• Drive (vibratory drive)
• Scale / load cell (continuous weighing)

Applications / Industries

• Chemical industry
• Pharmaceutical industry
• Food industry
• Cosmetics industry
• Any process requiring combined vacuum conveying, weighing and dosing of powders/granulates

System integration and hygienic design

• Modular system for straightforward integration into process plants and combination with vacuum conveying systems.
• Materials and connections selected for hygienic cleaning and process compatibility (AISI 304 / AISI 316; clamp connections).

Technical specifications

• Model: VFD 100
• Manufacturer / Brand: Volkmann
• Weighing concept: integrated load cell, loss‑in‑weight (LIW)
• Accuracy: typically a few grams (depending on application)
• Drive: electrically driven vibratory conveyor; adjustable conveying capacity; suitable for start/stop
• Materials: conveyor chute/pipe in AISI 304 or AISI 316 stainless steel
• Connections: clamp connections; FDA‑approved elastic compensators
• Control: PLC available (integrated or external integration with plant PLC)
• Cleaning / maintenance: easy to dismantle and assemble for cleaning
• Explosion protection: suitable for ATEX / explosive area applications
• Integration: designed for combination with vacuum conveying and downstream process stations (e.g. mixers)