Calpeda Pumps

SKU:BNM4 25/160B/A | 61800022000

Delivery Time: 2-3 Weeks Lead Time

Calpeda BNM4 | BNMS4 Bronze 4 Pole Centrifugal Pumps:

Quiet Running Bronze Pump – Calpeda BNM4 | For Marine, HVAC and Industrial Systems

Flow: Model dependent
Head: Lower head per kW than 2 pole models (approx. up to 45 m)
Power: Typically up to 15 kW (larger models in BNMS4)

Performance
The Calpeda BNM4 and BNMS4 are close coupled centrifugal pumps with 4 pole motors, designed to operate at lower speeds (≈1450 rpm) for quieter, more controlled flow. These bronze versions are ideal for treated, coastal or mildly aggressive water applications, where smooth hydraulic characteristics and quiet operation are desirable.

Applications
Suitable for:

• Heating and cooling circulation systems
• Water supply and distribution
• Marine and coastal applications
• Process water in industrial environments
• Irrigation systems with lower pressure demands

Construction

• BNM4: Extended shaft motor directly connected to a single impeller pump
• BNMS4: Stub shaft construction for use with standard motors, includes integrated thrust bearing
• Bronze pump casing, lantern bracket and impeller (CC480K EN 1982)
• Carbon ceramic mechanical seal with NBR elastomers
• Fully painted for additional corrosion resistance
• Threaded ports ISO 228/1 (BS 2779)

Operating Conditions
Liquid temperature: -10 °C to +90 °C
Ambient temperature: Up to 40 °C
Suction lift: Up to 7 m
Max working pressure: Up to 10 bar
Continuous duty (S3 60% for single phase motors ≤1.8 kW)

Motor
4 pole induction motor, 50 Hz (n ≈ 1450 rpm)
Three phase: 230/400 V up to 3 kW, 400/690 V from 4 kW
Insulation class F, protection IP54
Frequency converter compatible (from 0.37 kW for BNM4)
IE2 (single phase ≤1.1 kW), IE3 (three phase >0.65 kW)
Built to EN 60034 and EN 60335 standards

Delivery
Free UK mainland delivery from Pumps and Gearboxes Direct