Parker S8F-3/4 Solenoid Valve

The Parker S8F-3/4 Solenoid Valve is a pilot-operated, normally closed valve designed for high-performance fluid control in industrial refrigeration and HVACR systems. Built for the rigors of heavy-duty applications, this 3/4 inch port solenoid valve features a ductile iron body and is fully compatible with ammonia (R-717), as well as fluorinated refrigerants and oil lines. Its pilot-operated design ensures a higher flow capacity compared to direct-acting models, making it a reliable choice for liquid lines, suction lines, and as a pilot valve for larger gas-powered regulators. The inclusion of matching flanges allows for straightforward bolting into existing piping manifolds, simplifying the HVACR valve installation process for technicians in the field.

Engineered for technical precision, the Parker Refrigerating Specialties S8F maintains a maximum operating pressure differential (MOPD) of 300 psig and a maximum rated pressure of 400 psig (28 bar). The assembly utilizes a robust PTFE seat and a stainless steel plunger-needle for superior sealing and long-term durability against seat-wear. For maintenance, the replaceable piston-plug assembly and interchangeable coil housing facilitate rapid serviceability without removing the valve body from the line. This industrial refrigeration solenoid is a standard for contractors requiring precise, reliable flow control in high-capacity liquid feed systems.

• Optimized Flow Capacity: The pilot-operated mechanism provides significantly higher Cv values than standard direct-acting valves for larger capacity requirements.
• Refrigerant Versatility: Fully compatible with ammonia refrigeration systems, HFC, and HCFC refrigerants, providing a single-valve solution for diverse plant needs.
• Ease of Service: Features a replaceable seat and internal components that are interchangeable with other Parker S-series valves, reducing truck stock requirements.
• NEMA Rated Protection: Standard coil housings meet NEMA 3R and 4 ratings, ensuring rain-tight performance in outdoor condenser or rooftop applications.
• Manual Override Capability: Many configurations include a manual opening stem to allow for system evacuation or bypass during troubleshooting.

• Does the S8F require a minimum pressure drop to open? Yes, as a pilot-operated valve, the S8F generally requires a minimum pressure differential (typically around 1 psi) to lift the main piston, unlike smaller direct-acting models.
• What refrigerants can I use with this valve? This ammonia-compatible solenoid valve is rated for R-717, R-22, R-134a, R-404A, R-507, and standard refrigeration oils.
• What causes the coil to burn out on these units? Common causes include incorrect voltage supply, moisture ingress due to improperly sealed conduits, or mechanical sticking of the plunger due to system debris.

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.