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Boulton Trading Corporation > Products > Sanhua > SANHUA DRAIN PUMP (PSB-A series)

SANHUA DRAIN PUMP (PSB-A series)

Sanhua PSB-A Series

1. High Precision and Stability

  • Advantage: Uses advanced bellows technology and a refined spring mechanism for accurate set-points.

  • Benefit: Provides reliable protection that triggers exactly at the designated pressure, preventing “nuisance trips” while ensuring the compressor is never operated in a dangerous zone.

2. Enhanced Durability and Service Life

  • Advantage: The micro-switch is designed for a high number of electrical cycles (typically up to 100,000 cycles).

  • Benefit: Offers “set-it-and-forget-it” reliability, ensuring the safety of the HVAC system for years without the need for frequent replacement or recalibration.

3. Vibration and Impact Resistance

  • Advantage: Specifically engineered internal structure to resist the vibrations found in condensing units.

  • Benefit: Prevents false trips caused by mechanical vibration from the compressor, which is a common failure point in lower-quality pressure switches.

4. Flexible Installation and Adjustment

  • Advantage: Features an easy-to-read scale and a simple adjustment screw for differential and set-point tuning.

  • Benefit: Saves time for technicians during commissioning and maintenance, allowing them to precisely tune the safety limits to the specific needs of the installation site.

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Description

Sanhua PSB-A Series: Features and Details

1. Core Function and Construction

  • Function: Monitors the system pressure and opens/closes an electrical contact to stop the compressor in case of:

    • High Pressure: Prevents system bursts due to condenser fan failure or blockages.

    • Low Pressure: Prevents compressor damage due to refrigerant loss or evaporator freeze-ups.

  • Micro-Switch Mechanism: Uses a high-quality micro-switch for reliable electrical switching.

  • Bellows Technology: Utilizes high-grade copper or stainless steel bellows that expand and contract with pressure to trigger the switch.

  • Reset Options: * Automatic Reset: The switch closes again once the pressure returns to the normal range.

    • Manual Reset: A technician must physically press a button to restart the system after a trip (critical for high-pressure safety).

2. Technical Specifications

  • Refrigerant Compatibility: Applicable for all common HCFC and HFC refrigerants (R22, R134a, R404A, R407C, R410A, etc.).

  • Ambient Temperature: -30C to +70C.

  • Medium Temperature: -30C to +120C.

  • Electrical Rating: Typically rated for AC 110V/220V with high inductive load capacity.

  • Pressure Connections: Usually available with 1/4”Flare (SAE) connections with a capillary tube or direct mounting.

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