Fan Noiseblocker BlackSilentPro PK1 14 cm 700 RPM 49 m³/h

The Noiseblocker BlackSilentPro PK1 14 cm fan is a matte-black, low-speed case fan engineered for quiet PC cooling. With a frame reinforced by glass-fibre and a polycarbonate rotor, the fan delivers stable airflow up to 49 m³/h at a maximum speed of 700 RPM. The NB-EKA Plus II drive, NB-NanoSLI bearings and a low start voltage contribute to long service life and minimal operating noise. The compact dimensions (140 × 140 × 25 mm) and a 4.5 V low-voltage characteristic make this fan suitable for silent system builds.

Advantages

The BlackSilentPro PK1 combines a classical, robust chassis design with modern drive and bearing technology to ensure low impulse noise and reliable performance. Tool-free, vibration-free installation is enabled by the NB-Silentframe silicone seal and supplied mounting material. An extendable cable management system with combinable 20 cm and 50 cm plug-in cables simplifies routing, while reverse-pole and overload protection with an automatic restart function increase operational safety.

Suitable for

• Silent desktop PC builds where low noise is a priority
• Small form-factor cases compatible with 140 mm fans
• Systems requiring long-life, low-maintenance cooling
• Setups that benefit from tool-free, vibration-free mounting

Key specifications

• Model: Noiseblocker BlackSilentPro PK1 (MPN: ITR-PK-1)
• Fan diameter: 140 mm (140 × 140 × 25 mm)
• Maximum speed: 700 RPM
• Airflow: 49 m³/h
• Rated low voltage characteristic: 4.5 V start/operation
• Frame: glass fibre-reinforced chassis, matte black
• Rotor: anti-dust polycarbonate
• Bearings: NB-NanoSLI long-life, low-noise bearings
• Drive: NB-EKA Plus II with low impulse noise
• Protection: reverse-pole and overload protection, restart function
• EAN: 4250051906288

How to use

Mount the fan in a compatible 140 mm fan location using the supplied NB-Silentframe silicone seal and installation material for a vibration-free, tool-free installation. Choose the appropriate orientation to ensure the desired airflow direction through the case. Connect the fan using the provided plug-in cable(s); combine the 20 cm and 50 cm segments as needed for clean cable routing. Supply the fan with a compatible low-voltage source (noting the 4.5 V low-start characteristic) or through the system fan header as specified by the motherboard or fan controller documentation.

Usage recommendations

For best results in silent builds, use the BlackSilentPro PK1 at lower RPM and position it where unobstructed airflow is available. Regularly check for dust buildup on the polycarbonate rotor and chassis and clean gently to maintain airflow and the long service life of NB-NanoSLI bearings.