Wilo Para 25-130/7-50/SCU – High-Efficiency Circulation Pump

The Wilo Para 25-130/7-50/SCU is a high-efficiency glandless circulation pump specifically engineered for hot-water heating systems, including underfloor heating, hydronic floor circuits, and domestic heating applications requiring low head loss and energy optimized operation. Part of the Wilo-Para SCU series, this model combines a compact design with easy installation and robust performance for commercial and residential heating systems.

🌟 Key Features

• Designed for low head loss circulation in heating systems.
• Self-controlled operation with predefined settings for easy commissioning.
• Compact and robust design ideal for tight installation spaces.
• Energy efficient motor with automatic adjustment for optimized power use (EEI ≤ 0.20).
• LED interface and simple control via green push-button for setting regulation modes (∆p-v, ∆p-c, constant speed).
• Multiple built-in protection functions including air venting and manual reset.

📊 Technical Specification

📌 Pump Identification

• Model: Para 25-130/7-50/SCU
• Series: Wilo-Para SCU (self-controlled, low head application)

🔧 Hydraulic Data

• Nominal connection size: DN 25 / 1½″ threaded connections
• Port-to-port length: 130 mm standard length for compact applications
• Maximum operating pressure: PN 10 bar
• Maximum fluid temperature: up to 95 °C
• Minimum fluid temperature: down to –10 °C
• Ambient temperature range: –10 °C to 70 °C

🔌 Motor & Control

• Control mode: Self-controlled (SCU) – automatic regulation depending on system demands
• Mains connection: 1~230 V +10/-15 %, 50/60 Hz
• Energy Efficiency Index (EEI): ≤ 0.20 – high efficiency circulator
• Power consumption: Typically 50 W (nominal – depends on pump curve)
• Protection class: IPX4D – suitable for standard heating plant environments
• Approvals/markings: CE compliant

🛠 Materials & Construction

• Pump housing: Cast iron with protective cataphoretic coating for corrosion resistance
• Glandless design: Ensures minimal leakage risk and simplified maintenance

📍 Installation

• Connection type: G 1½″ threaded suction and discharge connections
• Port-to-port length: 130 mm – standard replacement size for many heating pumps
• Designed for compact and flexible system integration in new and retrofit applications.

🔍 Applications

The Wilo Para 25-130/7-50/SCU is ideal for:

• Residential and commercial underfloor heating loops
• Central heating circulation
• Hydronic systems with low to moderate pressure head
• Boiler feed and return circuits
• Heating systems where energy efficiency and reliability are priorities

📈 Performance Overview

This pump provides up to 7 m of head (approx.) with a flow capacity suited to medium-duty hydronic circuits. It balances energy efficiency, quiet operation, and reliable circulation performance especially in low head loss scenarios typical of underfloor networks. (Exact performance curves and volume flow data are available in OEM technical sheets specific to your system design.)