Ammonia Evaporator | Professional Manufacturer & Supplier for Industrial Cold Storage

We are a specialized OEM & ODM supplier of R717 Ammonia Evaporators (Unit Coolers) exclusively engineered for flooded/pump-circulated ammonia cold storage systems, covering medium-temp cold rooms (+5℃~-5℃), low-temp frozen warehouses (-18℃~-25℃) and blast freezers down to -40℃ working condition. Full capacity range: 12kW ~ 1200kW, customized dimension, fin spacing and defrost modes for global food cold chain, meat/seafood processing, fruit & vegetable bulk storage projects.

Core Construction & Material Option

Heat Exchange Tube: Standard seamless carbon steel A179; Optional SS304/SS316 stainless steel for coastal, high-humidity & food sanitary workshop to resist ammonia corrosion

Fin: Epoxy-coated anti-corrosion aluminum fin, adjustable fin pitch:4/6/8/10/12mm (narrow pitch for ultra-low temp freezer, wide pitch for medium-temp preservation cold storage)

Casing & Drain Pan: Hot-dip galvanized steel as standard; full stainless steel housing optional for corrosive ambient; slope-designed drain pan for rapid defrost wastewater draining

Design Pressure: 25bar working pressure, hydrostatic test at 32.5bar, fully compliant with international refrigeration pressure vessel standard

Three Available Defrost Configurations for Cold Storage

Hot Gas Defrost (Most popular for large ammonia cold storage)

Direct ammonia hot gas into coil bundle, fast full defrost, low running power consumption, ideal for large-capacity frozen warehouse & spiral freezers.

Electric Defrost

Built-in stainless steel heating tube on coil + drain pan, simple pipeline layout, easy installation & maintenance, fit small & medium cold rooms.

Water Defrost

High-efficient cleaning + defrost in one step, suitable for food processing cold storage with frequent sanitation requirements.

Key Product Advantages for Ammonia(R717) System

✅ Low ammonia refrigerant charge design: Optimized inner flow channel reduces NH3 filling volume by 35% vs traditional evaporator, improves site safety and meets global ammonia refrigeration safety code

✅ High heat transfer efficiency: Staggered tube layout boosts air turbulence, evaporator COP improved by 20%, cuts long-term chiller power cost

✅ IP55 EC variable-speed axial fans: Anti-freeze damp-proof motor, auto airflow adjustment by room temp, fan energy saving ≥40%, stable running at -40℃ ultra-low temp

✅ Two liquid feeding modes: Pump recirculation (mainstream for industrial ammonia plant) / gravity feeding, match all types of ammonia compressor unit layout

✅ Flexible installation: Ceiling suspended mounting & floor standing dual design, modular combination for oversized multi-span cold storage

Main Application Fields

Frozen food, meat, seafood ultra-low temp cold storage (-18~-35℃)

Fruit, vegetable, dairy medium-temperature preservation warehouse (0~+5℃)

Food processing workshop, blast freezing tunnel & spiral freezer

Large industrial logistics cold distribution center, ammonia centralized refrigeration project

Supplier Service & Customization

One-stop technical support: parameter calculation, thermal design, drawing customization based on cold storage size, evaporating temp & ammonia system scheme

Strict 100% air tightness & hydraulic pressure test before shipment; 18-month factory warranty

Mixed production: support cross-design for ammonia / CO2 / 35% glycol triple-purpose evaporator to unify project spare parts