A rotary feeder's real performance comes down to matching bore size, rotor design, and pressure rating to your actual conveying system and material — a valve sized off throughput alone, without checking pressure rating against your system, is a common cause of underperformance or seal failure.
Core Specifications
| Parameter | Range |
|---|---|
| Bore diameter | 150–600 mm |
| Maximum pressure | 3.5 bar (CVH model); up to 21 PSI for blow-through types |
| Maximum temperature | 300°C |
| Rotor vanes | 6, 8, 10, or 12 configurations |
| Drive speed | 3–33 RPM with VFD capability |
How Throughput Is Actually Calculated
Rated capacity isn't a fixed number — it's calculated from the formula T = 0.06 × V × N × Y × R, where V is volume per revolution, N is RPM, Y is fill efficiency (typically 0.7–0.9, material dependent), and R is bulk density. This is why two materials with different bulk density and flowability will produce different actual throughput from the same valve at the same RPM — a detail worth understanding before assuming a catalogue capacity figure applies directly to your product.
Model Range (CVR/CVA Series)
| Model | Volume (L/rev) | Bore (mm) | Motor (kW) |
|---|---|---|---|
| CVR/A-150 | 4 | 150 | 0.75 |
| CVR/A-200 | 8 | 200 | 1.1 |
| CVR/A-250 | 16 | 250 | 1.5 |
| CVR/A-300 | 24 | 300 | 2.2 |
| CVR/A-350 | 40 | 350 | 3.0 |
| CVR/A-400 | 46 | 400 | 3.0 |
| CVR/A-500 | 110 | 500 | 4.0 |
| CVR/A-600 | 150 | 600 | 4.0 |
Non-standard bore sizes are available on request, typically with an 8-week delivery timeframe — worth flagging early if your application falls outside the standard range.
Construction and Coatings
Standard construction runs from mild steel through 304 and 316 sanitary-grade stainless steel to Hastelloy for corrosive duty. Interior coatings — tungsten, Teflon, ceramic, or hard chrome — extend service life on abrasive materials, and are worth specifying upfront rather than adding after premature wear shows up.
Accessories Worth Considering
- Drop-out box for inspection and clearing blockages without full disassembly
- Speed monitor for confirming actual rotor speed against set point
- Vent box to relieve trapped air/gas pockets between pockets
- Shaft sealing — packing gland or air purge, chosen based on material and pressure duty
What to Send With Your Enquiry
A complete rotary feeder spec starts with: required bore size or throughput, system pressure differential, operating temperature, material abrasiveness and particle size, and hygiene requirements if sanitary duty. Review the full Rotary Valve specification range before finalising your conveying system's feed point.
Ready to talk about your rotary feeder?
ENZAC sizes and supplies rotary feeders in Malaysia based on your conveying system pressure and material. Send us your system details and we'll come back with a tailored specification.