Sporlan Controls 903581 7/8″ Discharge Bypass Valve, 0-80 PSI

Description

Sporlan Controls 903581 Discharge Bypass Valve Overview

The Sporlan Controls 903581 is a 7/8″ Discharge Bypass Valve engineered for reliable refrigeration system capacity control. Designed to regulate system pressure within a 0–80 PSI range, this valve automatically bypasses hot discharge gas back to the low side of the system, preventing evaporator freeze-up and maintaining stable suction pressure under varying load conditions. Sporlan’s proven valve engineering ensures consistent, long-lasting performance in commercial refrigeration and HVAC applications.

Key Features

• 7/8″ connection size for straightforward integration into existing refrigeration piping
• Operating pressure range of 0–80 PSI for broad system compatibility
• Discharge bypass design diverts hot gas to prevent evaporator icing at low load conditions
• Maintains stable suction pressure during partial-load operation
• Durable construction built to Sporlan’s industry-leading quality standards
• Suitable for commercial refrigeration and HVAC capacity control applications

Application

Discharge bypass valves are a critical component in refrigeration systems where compressor capacity exceeds the cooling load demand. By routing a controlled amount of hot discharge gas back to the suction side, the Sporlan 903581 prevents short-cycling, reduces compressor wear, and maintains consistent evaporator temperatures — extending equipment life and improving system efficiency.

Specifications

• SKU: 903581
• Brand: Sporlan Controls
• Connection Size: 7/8″
• Pressure Range: 0–80 PSI
• Valve Type: Discharge Bypass