Full In-Depth Product Breakdown of QVC Series Pneumatic Vacuum Feeders

1. Product Core Working Principle

All three QVC models adopt venturi pneumatic vacuum technology, eliminating electric vacuum pumps to cut motor failure risks and explosion hazards. Driven by factory compressed air (standard working pressure 0.6–0.8 Mpa), the machine circulates four automatic working cycles without manual operation: vacuum suction, gas-solid separation, pulse backflush cleaning, and gravity discharging.

Vacuum Suction Stage: Compressed air passes through the vacuum generator to form stable negative pressure inside the stainless steel hopper. Powder or granular raw materials are lifted via the PVC steel wire suction hose into the separation chamber. QVC-1 equips Φ25 thin hoses for low-volume micro-feeding; QVC-2 and QVC-3 upgrade to Φ38 thicker anti-blocking pipelines to handle higher flow rates and slightly agglomerated materials.

Gas-Solid Separation Stage: Stainless sintered filter elements trap solid particles while clean air is exhausted. The filter quantity and size are tiered by model to match throughput loads, avoiding frequent shutdown cleaning caused by filter clogging.

Pulse Backflush Stage: Built-in backflush system releases instantaneous high-pressure air to blow powder cake off filter surfaces. QVC-2 and QVC-3 add independent backflush air bags to amplify impact force for deep cleaning compacted fine dust.

Discharging Stage: CRB2BW30-90SZ blade oscillating cylinder drives the self-made sealed discharge gate to open. Multi-layer food-grade silicone seals maintain airtightness during suction cycles to prevent vacuum loss and unstable feeding output.

2. Complete Standard Configuration Tiered Comparison

Every component of the QVC series is standardized with differentiated upgrades for different capacity demands, all contact parts using food-grade 304 stainless steel to meet GMP hygiene standards:

2.1 Filtration & Backflush System

QVC-1: 4 pcs Φ40×100 stainless steel filter elements, single Airtac backflush valve without air bag, suitable for low-dust micro-batch conveying.

QVC-2: 4 pcs Φ60×200 extended filters, QEA-15 quick exhaust valve + Φ89×200 backflush air bag, larger filtration area for medium continuous production.

QVC-3: 6 pcs Φ60×300 ultra-long filters, QEA-15 valve + Φ89×165 large-capacity air bag, 50% larger total filtering area than QVC-2, with pre-separation buffer bin to reduce filter abrasion from heavy material flow.

2.2 Discharging Pneumatic Assembly

All three models share the same industrial-grade CRB2BW30-90SZ swing cylinder for stable gate opening/closing; the discharge gate body is thickened proportionally for QVC-3 to bear heavier bulk material weight, with widened sealing contact surfaces to eliminate powder leakage gaps.

2.3 Stainless Steel Hopper Structure & Dimensions

QVC-1: Horizontal slim layout, Φ140×490 overall size, 1.1L small hopper volume, compact design for narrow installation gaps above lab equipment and small packaging machines.

QVC-2: Vertical conical integrated silo, Φ213×790, 4.1L capacity, tapered bottom eliminates powder bridging and material dead zones, ideal for medium-viscosity powder like cocoa and spice mixtures.

QVC-3: Segmented three-section vertical bin (buffer separation zone + filter chamber + large storage zone), Φ290×1072, 7.7L volume, pre-separates large particles before filtering to extend filter service life by over 40%.

2.4 Intelligent Control Cabinet

Uniform control architecture across the series with tiered adaptability: self-developed dedicated circuit board, Taiwan Mean Well switching power supply, full set of Chint electrical components. The control program is pre-calibrated to match each model's suction/backflush timing parameters, with adjustable cycle intervals for custom material properties. Standard 5-meter suction hose included for all units; extended pipe lengths available for custom orders.

3. Tiered Technical Parameter Full Table

All throughput test benchmarks use wheat flour under unified conditions (3m vertical lift, 2m horizontal conveying distance, data for reference only):

Item	QVC-1	QVC-2	QVC-3
Rated Power Supply	220V / 50Hz	220V / 50Hz	220V / 50Hz
Standard Conveying Capacity	100–350 kg/h	350–700 kg/h	700–1000 kg/h
Hopper Effective Volume	1.1 L	4.1 L	7.7 L
Working Air Pressure	0.6–0.8 Mpa	0.6–0.8 Mpa	0.6–0.8 Mpa
Suction Pipe Spec	Φ25 PVC steel wire hose (5m)	Φ38 PVC steel wire hose (5m)	Φ38 PVC steel wire hose (5m)
Core Filter Spec	4 pcs Φ40×100 SS filter	4 pcs Φ60×200 SS filter	6 pcs Φ60×300 SS filter
Backflush Configuration	Single backflush valve	Valve + Φ89 L200 air bag	Valve + Φ89 L165 air bag
Overall Outer Size	Φ140 × 490 mm	Φ213 × 790 mm	Φ290 × 1072 mm

 

 

 

4. Material & Hygiene Design Advantages

All material contact surfaces adopt mirror-polished 304 stainless steel with seamless welding, no dead corners where powder accumulates. Quick-clamp flange connections without special tools enable full disassembly for batch formula switching cleaning. Silicone seals are food/medical compliant, high-temperature resistant, and non-sticky to fine powders. The fully closed negative-pressure conveying structure achieves zero fugitive dust emission, complying with EU workplace hygiene and FDA food contact regulations.

5. Customizable Modifications

Non-standard customization items require technical confirmation with sales engineers: anti-static filter elements for flammable powders, explosion-proof electrical control boxes, lengthened suction pipelines, 316L corrosion-resistant hoppers for acidic chemical raw materials, and multi-machine linkage synchronous control systems for full production line automation. All finished equipment is packed in solid wooden cases for cross-border land logistics to avoid transit collision damage.