Packaged Units/skids - ECRU | ADCA

ADCA ADCAMAT ECRU – Electric Condensate Return Unit

The ADCA ECRU is a pre-assembled electric unit designed for the collection and return of hot condensate. It is utilized when condensate needs to be transferred to a higher elevation or into a line with greater pressure, typically towards a boiler feedwater tank. Standard configurations accommodate flow rates up to 30 m³/h, with custom versions available upon request.

Operating Principle

Condensate enters the horizontal collection tank through top connections with stainless steel diffusers. Rising levels activate level switches, starting the electric pumps. Under normal operation, pumps alternate. During peak flow, cascading configuration engages both pumps simultaneously.

Basic Configuration

• Horizontal receiver 225, 600, or 850 L,
• One or two electric pumps,
• Magnetic level indicator with bi-stable switches,
• Isolation valves, filters, check valves, pressure gauges,
• Control panel IP65 or higher,
• Metal frame from S235JR or stainless steel,
• Optional thermal insulation with mineral wool and aluminum cladding.

Technical Specifications

• Condensate temperature: up to 98 °C
• Power supply: 3~ 380–415 V AC, 50 Hz
• Connections: EN 1092-1 PN16
• Alternatives: ASME B16.5 Class 150, NPT
• Tank material: P235GH or AISI 316 / 1.4401
• Pumps: cast iron or stainless steel, low-NPSH
• Models: EC225, EC600, EC850
• Reference flows: 2, 4, 10, 20, or 30 m³/h
• Head: 10, 20, or 30 m, per model

Unit Selection

Selection is based on condensate flow, temperature, pump head, return line pressure, available NPSH, construction material, redundancy needs, and automation requirements. For hot condensates near 98 °C, suction must be carefully checked to avoid cavitation.

Compliance

The ECRU operates at atmospheric pressure and is outside the PED scope. It complies with the Machinery Directive and carries CE marking. With an integrated panel, it also meets low voltage and electromagnetic compatibility requirements.

FAQ

When is it chosen over a mechanical pump?
When electrical power is available and continuous condensate return with controlled level is required.

When is a stainless steel version required?
In corrosive condensates, increased chemical stress, or installations with cleanliness requirements.