York S1-VLHP-DSF4 Valve
The York S1-VLHP-DSF4 is a precision-engineered 1-ton reversing valve manufactured by Dunan, specifically designed for heat pump applications within York and Johnson Controls HVAC systems. This 4-way reversing valve serves as the primary component for refrigerant flow redirection, allowing the system to toggle between heating and cooling modes by shifting the internal slide mechanism. Built with a forged brass body and high-tolerance internal components, this valve minimizes internal leakage—a common cause of lost compression and system inefficiency in residential split systems. As a critical heat pump valve replacement, it ensures the unit maintains proper head pressure and suction gas temperature during extreme ambient conditions. The York S1-VLHP-DSF4 is optimized for HVAC refrigerant control, providing a reliable pilot-operated shift that technicians rely on when troubleshooting units that are stuck in one mode or demonstrating bypass across the discharge and suction ports.
Key Benefits for Technicians- OEM Compatibility: Precision-fit for York 1-ton heat pump units, ensuring factory-standard performance.
- Enhanced Efficiency: Tight internal seating prevents high-to-low side refrigerant migration, protecting the compressor.
- Field Reliability: Durable copper-to-brass brazing points facilitate a secure, leak-free installation in the field.
Does this valve come with a new solenoid coil?
The S1-VLHP-DSF4 typically requires the reuse of the existing solenoid or a separate purchase of a compatible coil; always verify coil voltage (24V or 120V/240V) before installation.
What are the signs of a stuck S1-VLHP-DSF4 valve?
Technicians should look for localized frosting on the valve body, failure to shift when the solenoid is energized, or equalizing pressures across the suction and discharge lines during operation.
What precautions should be taken during brazing?
To prevent warping the internal slide or damaging the seals, the valve body must be wrapped in a wet rag or heat-sink paste during the brazing process to keep the core temperature below 250°F.
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.
Original: $56.78
-65%$56.78
$19.87York S1-VLHP-DSF4 Valve
The York S1-VLHP-DSF4 is a precision-engineered 1-ton reversing valve manufactured by Dunan, specifically designed for heat pump applications within York and Johnson Controls HVAC systems. This 4-way reversing valve serves as the primary component for refrigerant flow redirection, allowing the system to toggle between heating and cooling modes by shifting the internal slide mechanism. Built with a forged brass body and high-tolerance internal components, this valve minimizes internal leakage—a common cause of lost compression and system inefficiency in residential split systems. As a critical heat pump valve replacement, it ensures the unit maintains proper head pressure and suction gas temperature during extreme ambient conditions. The York S1-VLHP-DSF4 is optimized for HVAC refrigerant control, providing a reliable pilot-operated shift that technicians rely on when troubleshooting units that are stuck in one mode or demonstrating bypass across the discharge and suction ports.
Key Benefits for Technicians- OEM Compatibility: Precision-fit for York 1-ton heat pump units, ensuring factory-standard performance.
- Enhanced Efficiency: Tight internal seating prevents high-to-low side refrigerant migration, protecting the compressor.
- Field Reliability: Durable copper-to-brass brazing points facilitate a secure, leak-free installation in the field.
Does this valve come with a new solenoid coil?
The S1-VLHP-DSF4 typically requires the reuse of the existing solenoid or a separate purchase of a compatible coil; always verify coil voltage (24V or 120V/240V) before installation.
What are the signs of a stuck S1-VLHP-DSF4 valve?
Technicians should look for localized frosting on the valve body, failure to shift when the solenoid is energized, or equalizing pressures across the suction and discharge lines during operation.
What precautions should be taken during brazing?
To prevent warping the internal slide or damaging the seals, the valve body must be wrapped in a wet rag or heat-sink paste during the brazing process to keep the core temperature below 250°F.
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.
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Description
The York S1-VLHP-DSF4 is a precision-engineered 1-ton reversing valve manufactured by Dunan, specifically designed for heat pump applications within York and Johnson Controls HVAC systems. This 4-way reversing valve serves as the primary component for refrigerant flow redirection, allowing the system to toggle between heating and cooling modes by shifting the internal slide mechanism. Built with a forged brass body and high-tolerance internal components, this valve minimizes internal leakage—a common cause of lost compression and system inefficiency in residential split systems. As a critical heat pump valve replacement, it ensures the unit maintains proper head pressure and suction gas temperature during extreme ambient conditions. The York S1-VLHP-DSF4 is optimized for HVAC refrigerant control, providing a reliable pilot-operated shift that technicians rely on when troubleshooting units that are stuck in one mode or demonstrating bypass across the discharge and suction ports.
Key Benefits for Technicians- OEM Compatibility: Precision-fit for York 1-ton heat pump units, ensuring factory-standard performance.
- Enhanced Efficiency: Tight internal seating prevents high-to-low side refrigerant migration, protecting the compressor.
- Field Reliability: Durable copper-to-brass brazing points facilitate a secure, leak-free installation in the field.
Does this valve come with a new solenoid coil?
The S1-VLHP-DSF4 typically requires the reuse of the existing solenoid or a separate purchase of a compatible coil; always verify coil voltage (24V or 120V/240V) before installation.
What are the signs of a stuck S1-VLHP-DSF4 valve?
Technicians should look for localized frosting on the valve body, failure to shift when the solenoid is energized, or equalizing pressures across the suction and discharge lines during operation.
What precautions should be taken during brazing?
To prevent warping the internal slide or damaging the seals, the valve body must be wrapped in a wet rag or heat-sink paste during the brazing process to keep the core temperature below 250°F.
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.
