Sanhua Valves
Sanhua is a global leader in HVAC and refrigeration controls, and their valve range plays a critical role in system efficiency, reliability, and precise refrigerant management. For installers, OEMs, and service professionals, understanding Sanhua valves and how they add value to modern systems can significantly improve performance and lifecycle cost.
Why Sanhua Valves Matter?
Sanhua develops components specifically for refrigeration and air conditioning applications, focusing on stable flow control, long service life, and compatibility with today’s refrigerants. Their portfolio covers key functions in the circuit: expansion, shut-off, solenoid control, and service access, allowing complete solutions from a single supplier.
In practical terms, this means better superheat control, reduced energy consumption, and more reliable operation in demanding environments such as cold rooms, supermarket refrigeration, chillers, and VRF/VRV systems.
Core Sanhua Valve Families
- Thermostatic Expansion Valves (TXVs)
Sanhua TXVs, such as the RFGD series, regulate refrigerant flow into the evaporator based on superheat, maintaining stable evaporator performance and preventing liquid return to the compressor. They support common refrigerants like R22 and R410A and are designed for high operating pressures typically seen in modern air conditioning systems. - Electronic Expansion Valves (EEVs)
The Q, S, T and DPF-TS/S series electronic expansion valves offer precise, step‑controlled refrigerant flow, ideal for inverter systems, VRF, and advanced cold room controls. By dynamically adjusting to load conditions, these valves enable fast pull‑down, accurate temperature control, and measurable energy savings over traditional mechanical solutions.
Solenoid, Service, and Control Valves
- Solenoid Valves (e.g., HDF series)
HDF solenoid valves are piston‑type, pilot‑operated valves used for liquid line shut‑off, hot gas bypass, and injection applications. They are designed for a wide temperature range and are compatible with multiple HFC refrigerants, making them suitable for both air conditioning and refrigeration duty. - Service and Line Valves
Bar stock service valves provide safe isolation and service access points, with high maximum operating pressures to meet current refrigerant standards. These valves are typically installed at compressors, receivers, and critical points in the circuit to simplify maintenance and commissioning.
Key Technical Advantages for Customers
- Wide refrigerant and temperature envelope
Many Sanhua valves are qualified for common HFCs and newer low‑GWP refrigerants, with medium temperature ranges often from approximately −30°C−30°C up to +70°C+70°C, depending on series. This flexibility helps future‑proof systems against refrigerant transitions and regulatory changes. - Energy efficiency and precise control
Electronic expansion valves and optimized flow paths help systems operate closer to design conditions, improving COP and reducing compressor cycling. This is especially important in variable‑speed and multi‑indoor unit systems where load fluctuates throughout the day. - Compact, service‑friendly design
Many valve series are designed with low height, compact bodies and robust coils or power elements, making them suitable for tight equipment layouts and field service. Features like adjustable superheat, bidirectional flow, and high MOPD enhance flexibility during design and commissioning.
How Boulton Trading Supports Sanhua Users?
As authorised importers and distributors of Sanhua components, Boulton Trading Corporation can help you select the correct Sanhua products based on capacity, refrigerant, and application. From electronic expansion valves for advanced systems to solenoid and service valves for day‑to‑day installations, the right choice ensures reliability, efficiency, and long‑term performance.
For project support, sizing assistance, or product availability, customers can reach out with system details (refrigerant, capacity, temperature levels), and a suitable Sanhua valve configuration can be recommended to match their technical and commercial requirements.