CVR Drop-Through Rotary Valve
Standard drop-through airlock for gravity discharge and vacuum feeding.
3-4 weeks ex works
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Rotary valves · Airlocks · Feeders
Precision rotary valves, airlocks and rotary feeders for pneumatic conveying, bulk solids handling.
Custom stainless bodies, rotors and end plates, machined and tested in our own plant in Jiangyin — including duty at 850 °C, 50 % moisture and highly abrasive product.
- Machined in-house
- PMI and dye-penetrant tested
- Standard valves from 3 weeks
- Quoted within one working day
4,500 m²
Plant in Jiangyin, China
850 °C
Process temperature
Ra 0.03 µm
Polished contact surfaces
3 weeks
Standard lead time
2,000+
Valves a year
Valve families
Five bodies, one decision at a time
Drop-through for gravity and vacuum duty, blow-through for conveying lines, quick-clean for hygiene, wear-resistant for abrasives, side-entry where the product must arrive whole.
CVB Blow-Through Rotary Valve
Direct connection into positive-pressure pneumatic conveying lines.
3-4 weeks ex works
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CVQ Quick-Cleaning Rotary Valve
Sanitary design with rail-mounted rotor extraction.
4-6 weeks ex works
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CVC Wear-Resistant Rotary Valve
Ceramic liner or tungsten carbide coating for abrasive powders.
4 weeks ex works
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CVO Shear Protector Rotary Valve
Side-entry design to protect fragile granules from shearing.
4-6 weeks ex works
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Where it sits in the line
The position decides the valve
Start from the process position, not from the model number: the same body behaves differently under a silo, in a vacuum line and under a dust collector.
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01
Pneumatic Conveying
Requires a pressure-tight airlock holding up to 1.5 bar differential while metering into dilute- or…
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02
Vacuum Feeding
Airlock under a vacuum receiver that returns product to atmosphere while holding receiver vacuum to…
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03
Dust Collector Discharge
Discharges collected dust from under the filter bags against light negative pressure, at up to…
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04
Gravity Discharge
Straight gravity feed with no differential pressure, where the valve acts as a controllable on/off…
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05
Packaging System
Meters a repeatable dose per cycle into weigh hoppers and bag fillers at up to…
Industries
Built for six process worlds
Chemical, food and beverage, dairy, pharmaceutical, cement and mineral, plastics — each judges a valve by a different limit.
Food & Beverage
Frequent product changeovers and wet cleaning demand a valve that opens…
Industry →Dairy
Sticky, hygroscopic milk powder and daily washdown call for a drainable…
Industry →Cement & Mineral
Abrasive clinker and hot raw meal wear a valve out, so…
Industry →Plastic
Pellets and regrind are cut and smeared at the rotor tip,…
Industry →Chemical & Petrochemical
Corrosive powders and toxic dust need a sealed, chemically resistant valve…
Industry →Pharmaceutical
API and excipient handling needs fully cleanable surfaces and no product…
Industry →How we verify
Measured, not claimed
Bodies, rotors and end plates are cast and machined under one roof in Jiangyin, so the tolerance on the drawing is the tolerance on the flange. Each order ships with its own inspection records.
- PMI Every body is checked by positive material identification before it is machined.
- Dye penetrant Casting and weld surfaces are inspected for porosity and hairline defects.
- Air tightness Every assembled valve is leak tested on the bench before it is packed.
- Roughness Ra is measured and recorded per valve — 0.03 µm on sanitary contact surfaces.
- Documents CE declaration and ISO 9001:2015 certificate travel with the shipment, in the buyer’s name where needed.
Case studies
Three materials that broke other valves
850 °C ash, activated clay at 50 % moisture, cement that bridges a silo: what the plant was fighting, what we changed, and what it measured afterwards.
Solving Cement Bridging & Blockage
Wet raw meal bridged over the inlet and wore out a standard valve in nine months; a large-clearance…
Case study
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850°C Coconut Ash Handling
850 °C ash carbonised the bearing grease and distorted standard rotors; a water-cooled body with a heat-isolated end…
Case study
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50% Moisture Activated Clay
50 % moisture bleaching earth packed the pockets of a standard valve; a helical rotor with adjustable tips…
Case study
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Next step
Send the four numbers that decide the valve
Material, temperature, pressure differential and target throughput. With those four we can recommend a body, a rotor and a seal, and quote it — without a site visit in most cases.
- Product name and bulk density
- Temperature range and whether it is continuous
- Pressure differential and conveying air, if any
- Inlet and outlet flange size and drilling standard