Shick Esteve

Shick Esteve engineers ingredient-handling systems and is now presented within Coperion’s portfolio. Its rotary-valve relevance lies in system integration: moving, feeding and isolating dry ingredients between storage, conveying, weighing, batching and process equipment.

Company and system scope

Shick Esteve’s documented work covers pneumatic conveying, ingredient automation, weighing, batching, controls and process integration. Rotary airlocks and blow-through feeders sit at the interfaces between those functions.

This matters during procurement. A valve may be mechanically suitable yet perform poorly because the hopper outlet, conveying-air balance, controls or downstream receiver were treated as somebody else’s problem.

Rotary airlocks in ingredient systems

A drop-through airlock meters product through rotating pockets while restricting gas flow across a pressure boundary. A blow-through feeder introduces conveying air through the discharge region to clear pockets into the line.

The choice depends on material cohesion, particle fragility, pressure differential, required rate and route. Blow-through assistance can improve pocket emptying for some products, but it can also increase particle velocity and wear. Representative trials are more useful than arguments based on catalogue labels.

Food-process engineering

Ingredient plants need more than stainless steel. Hygienic review includes surface finish, internal geometry, seals, access, cleaning method, allergen changeover and the possibility of product trapped behind the rotor or endplate.

System controls should preserve recipe identity and prevent transfer to the wrong destination. Interlocks need defined behavior after power loss, pressure loss, a blocked line or an incomplete batch.

Pressure, leakage and capacity

Capacity calculations should use the actual bulk density and expected pocket fill. Air leakage rises with pressure differential and clearance, and that gas can disturb product entry from the hopper.

For dense or abrasive ingredients, drive torque and wear become part of the sizing problem. For fragile inclusions, rotor speed, pocket geometry and inlet shear are often more important than nominal throughput.

Safety and installation

Combustible powders require a dust hazard assessment, grounding and bonding, ignition-source control and a defined explosion-protection concept. A rotary valve performs explosion isolation only when the exact assembly is qualified for that duty.

Installation drawings should reserve access for seal work, rotor withdrawal and cleaning. They should also show flexible connections, supports and the battery limits for instrumentation, air, controls and guarding.

Commissioning and acceptance

A useful factory or site test measures rate, repeatability, leakage behavior, product condition, cleanout and recovery from expected faults. Test material should reproduce the relevant flow, wear and moisture behavior.

Acceptance criteria belong in the purchase specification before the equipment is built. Otherwise, the commissioning team is left deciding what “works” means while production waits.

Questions for Shick Esteve

• Which party owns valve sizing, hopper interface and conveying-air calculations?
• What material tests support the selected rotor and clearance?
• How is the equipment opened, cleaned, inspected and reassembled?
• Which controls and interlocks are included in the system boundary?
• What performance and sanitation evidence will be produced at acceptance?

Related engineering context

The Rotary Valves technology page explains the component physics. The Pneumatic Conveying hub covers the wider system, and the food-processing list focuses on hygienic evidence.