Professional Chinese Custom Ammonia Iqf Evaporator Coil Manufacturer

CST Heat Exchanger (cstheatexchanger.com) is a professional custom ammonia IQF evaporator coil manufacturer. We adopt stainless steel tube construction compatible with R717 ammonia refrigerant, offering flexible fin pitch customization tailored for seafood, frozen meat and cheese IQF production. Our coils support hot gas defrost design, resist heavy frosting, comply with food hygiene standards and serve IQF tunnel and spiral freezer manufacturers worldwide.

Core focus: Custom ammonia IQF evaporator coils for tunnel / spiral IQF freezers

Tube options: 304 / 316 stainless steel tubes (preferred for ammonia food lines)

Flexible customization:

✅ Fin spacing 4mm ~ 16mm, gradient/variable fin pitch available

✅ Design matched for seafood, meat, cheese, vegetable IQF

✅ Optimized circuit layout for ammonia two-phase flow

✅ Support hot gas defrost, high-pressure washdown structure

Testing: Air tightness & hydrostatic pressure test for ammonia safety requirements

Certifications: CE, ISO; widely exported to Southeast Asia, Latin America, Europe

Advantage: Balanced performance & lead time; professional support for high-humidity IQF frosting control

Key Technical Requirements for Ammonia IQF Evaporator Coils

Tube Material Recommendation

Ammonia reacts with copper → COPPER TUBES CANNOT BE USED.

Mandatory: 304 / 316L stainless steel tubes.

Fin Design

Wide fin spacing (8–14mm) for meat, seafood to mitigate rapid frosting; variable gradient fin pitch optional.

Circuit Design

Reasonable pass arrangement for ammonia gravity / liquid recirculation systems.

Pressure Standard

Design pressure ≥ 25 bar, complete hydrostatic & pneumatic testing report.

Hygiene Structure

Smooth frame, no dead corners for food factory CIP cleaning.