Sporlan 108619 SBFSE-A-ZP Expansion Valve

The Sporlan 108619 SBFSE-A-ZP is a balanced ported, thermostatic expansion valve (TXV) engineered for high-performance modulation in medium to low-temperature refrigeration systems using R-404A or R-502. Designed with a 3x4 ODF solder connection, this valve provides precise superheat control across a nominal capacity range of 1/2 to 1 ton. The ZP charge is specifically calibrated for pressure-limiting applications, protecting the compressor motor from overload during high-load periods or startup scenarios. The SBFSE series utilizes a stainless steel power element and a balanced port design that compensates for varying head pressures, ensuring consistent evaporator feeding. For contractors, this means improved system stability and reduced hunting, even in systems subject to significant ambient temperature fluctuations or varying load conditions.

Technical Advantages

• SBFSE series balanced port construction maintains accurate flow control despite fluctuations in liquid temperature or pressure drop across the valve.
• ZP thermostatic charge provides a critical Maximum Operating Pressure (MOP) function to prevent suction pressure spikes.
• Bi-directional flow capability allows for versatile installation in heat pump or complex refrigeration cycles.
• 3/8" x 1/2" ODF connections ensure a secure, leak-proof solder joint for standard refrigeration piping.
• Corrosion-resistant stainless steel diaphragm and power element provide long-term reliability in harsh mechanical environments.

Common Installation Questions

How does the ZP charge protect the compressor?
The ZP charge acts as a pressure-limiting element. Once the suction pressure reaches a predetermined limit, the valve throttles the flow, preventing the compressor motor from exceeding its rated amperage during pull-down.

Can this valve be used with R-448A or R-449A?
While designed for R-404A and R-502, some technicians use these in retrofit scenarios; however, superheat adjustments are necessary to account for the different pressure-temperature relationships of HFO blends.

Is the internal check valve feature standard?
Yes, the SBFSE series includes an internal check valve, making it suitable for bypass flow in reverse cycle applications without additional external piping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.