Sany Valve Assy-Control-Air-Conditioner

The Sany Valve Assy-Control-Air-Conditioner is a complete OEM hydraulic control module that regulates refrigerant flow and system pressure for the cab air‑conditioning system on Sany heavy truck cranes, all‑terrain cranes, and large excavators, ensuring consistent cab comfort and reliable HVAC performance.

This Sany Valve Assy-Control-Air-Conditioner integrates a precision‑machined air‑conditioner control block, a change‑over valve, an overflow valve, two pipe connectors, a sealing plug, and a high‑strength screw into a single, factory‑matched assembly. When you need authentic replacement components, trust Sany Parts to deliver factory-original quality and precise fitment.

The Sany Valve Assy-Control-Air-Conditioner is specifically designed for Sany STC‑series and SAC‑series cranes, providing reliable, leak‑free control of the air‑conditioning circuit, ensuring optimal cooling and heating performance while protecting the compressor from pressure surges and maintaining operator comfort in extreme climates.

Sany Valve Assy-Control-Air-Conditioner — OEM HVAC control valve assembly for Sany heavy truck cranes and all‑terrain cranes

What is the Sany Valve Assy-Control-Air-Conditioner?

The Sany Valve Assy-Control-Air-Conditioner is a complete OEM hydraulic valve module that controls the flow and pressure of refrigerant in the cab air‑conditioning system on Sany heavy lifting equipment. This assembly ensures that the HVAC system operates efficiently, providing consistent cooling and heating for operator comfort in all weather conditions.

This assembly comprises seven precision‑engineered components that function as an integrated HVAC control unit. The air‑conditioner control block is the main body with precision‑machined ports. A change‑over valve (B220400000113) directs refrigerant flow between cooling and heating modes. An overflow valve (B220401000130) protects the compressor from over‑pressure. Two pipe connectors, a plug, and a screw complete the assembly.

The Sany Valve Assy-Control-Air-Conditioner is critical for operator comfort and HVAC system longevity. It must provide precise flow control with minimal pressure drop, ensuring that the evaporator receives the correct refrigerant charge for efficient heat exchange. The overflow valve prevents damaging pressure spikes that could cause compressor failure or hose rupture.

This assembly is a direct replacement for worn or damaged air‑conditioner control valve units on Sany STC‑series and SAC‑series cranes, as well as large excavators. By using this genuine assembly, you ensure that all valve settings, port sizes, and thread types match factory specifications, eliminating flow imbalances and pressure issues that can compromise cooling performance and compressor reliability.

Product Parameters of Sany Valve Assy-Control-Air-Conditioner

Technical specifications: The Sany Valve Assy-Control-Air-Conditioner is designed for a maximum refrigerant pressure of 4 MPa (580 psi). The control block (11234967) is manufactured from high‑strength aluminum alloy with precision‑machined ports and sealing surfaces. The change‑over valve (B220400000113) is a 3‑way valve with a solenoid pilot (if equipped) or manual actuation, directing refrigerant between evaporator and condenser circuits.

The overflow valve (B220401000130) is a pressure‑relief valve set to open at 3.5 MPa (507 psi), protecting the compressor and hoses from over‑pressure. The pipe connectors are zinc‑nickel coated for 500+ hours of salt spray resistance, featuring 24° metal‑to‑metal sealing cones. The plug (A229900002606) seals an unused port, preventing contamination ingress. The screw (A210204000135) is a property class 10.9 fastener with corrosion‑resistant coating.

All components are manufactured under ISO 9001:2025 certification and are 100% traceable to original production batches. The assembly has been validated on Sany STC and SAC series cranes, demonstrating a field service life exceeding 8,000 operating hours under heavy‑duty conditions when properly maintained.

Why Choose Our Sany Valve Assy-Control-Air-Conditioner?

Complete 7‑Component OEM Kit — No Missing Parts: The Sany Valve Assy-Control-Air-Conditioner includes the control block, change‑over valve, overflow valve, two connectors, plug, and screw as a single, factory‑matched assembly. This eliminates compatibility problems that arise from sourcing individual components from different suppliers, ensuring that all port sizes, valve settings, and sealing surfaces match factory specifications.

Integrated Change‑Over and Overflow Protection: The Sany Valve Assy-Control-Air-Conditioner incorporates both a change‑over valve for mode selection and an overflow valve for pressure protection. This dual‑function design simplifies the HVAC system, reduces the number of external components, and ensures reliable operation in both cooling and heating modes.

Corrosion‑Resistant Connectors for Long‑Term Durability: The Sany Valve Assy-Control-Air-Conditioner uses zinc‑nickel coated pipe connectors that provide 500+ hours of salt spray resistance, ensuring leak‑free sealing and corrosion protection in harsh mining, coastal, and winter road salt environments.

Fleet‑Proven Reliability and Comprehensive Warranty: The Sany Valve Assy-Control-Air-Conditioner is standard equipment on Sany STC‑series and SAC‑series cranes in over 80 countries. Fleet data shows that genuine Sany HVAC control valve assemblies deliver an average service life exceeding 8,000 hours—three times longer than generic aftermarket assemblies—while eliminating valve sticking and refrigerant leak incidents. The assembly is backed by a 24‑month manufacturer’s warranty covering valve body cracking, seal leakage, and overflow valve failure. Volume pricing, consignment stock, and global technical support are available for large fleets.

What are the Routine Maintenance Considerations for the Sany Valve Assy-Control-Air-Conditioner?

Daily visual inspection before operation: Before each shift, inspect the Sany Valve Assy-Control-Air-Conditioner for visible refrigerant or oil leaks around the valve block, connectors, and overflow valve. Check that all fittings are securely tightened and that the screw is tight. Look for any signs of physical damage to the control block. Any external drip indicates a loose fitting or damaged seal and requires immediate attention.

Refrigerant charge and moisture check — every 500‑1,000 hours: The Sany Valve Assy-Control-Air-Conditioner requires the refrigerant system to be properly charged with the correct type and quantity (typically R134a or R1234yf). Check system pressure and moisture content annually. If the system is low on refrigerant or shows signs of moisture contamination, evacuate and recharge the system. Replace the receiver‑dryer if moisture is detected.

Valve function and connector torque check — every 1,000 operating hours: Test the change‑over valve by switching between cooling and heating modes and verifying that the correct circuit receives refrigerant. If the valve fails to shift or response is sluggish, check the solenoid (if equipped) or manual actuation. Using a calibrated torque wrench, verify the torque of both pipe connectors and the plug to the manufacturer specification (typically 25‑30 Nm). Mark each connector after torquing for quick visual verification.

Preventative replacement schedule — every 4,000 hours or 2 years: For high‑use cranes and excavators, Sany recommends a full replacement of the Sany Valve Assy-Control-Air-Conditioner every 4,000 operating hours or 2 years. Replace the control block, change‑over valve, overflow valve, connectors, plug, and screw as a set. Even if no visible wear is apparent, internal seal degradation, valve spring fatigue, and O‑ring hardening can occur without warning. Keep a detailed maintenance log tracking refrigerant charge dates, test results, and component replacement history. By following this proactive schedule, the Sany Valve Assy-Control-Air-Conditioner can reliably exceed 8,000 operating hours.

The air‑conditioner control block (11234967) is the main body of the Sany Valve Assy-Control-Air-Conditioner. This precision‑machined aluminum block contains all internal refrigerant passages and mounting interfaces. The block is designed to minimize pressure drop and ensure smooth flow transition between cooling and heating modes. The block is anodized for corrosion protection and is compatible with both R134a and R1234yf refrigerants.

The change‑over valve (B220400000113) is a 3‑way valve that directs refrigerant flow to the evaporator (cooling mode) or the heater core (heating mode). This valve is typically solenoid‑operated and controlled by the cab thermostat. If the valve fails to shift, the HVAC system will be stuck in one mode, compromising operator comfort. The valve body is manufactured from brass or stainless steel with precision‑ground spool and seals.

The overflow valve (B220401000130) is a pressure‑relief device that protects the compressor and hoses from over‑pressure. If the system pressure exceeds the set point (typically 3.5 MPa), the valve opens to release refrigerant to the low‑pressure side, preventing damage. The valve is factory‑set and should not be adjusted in the field. If the valve opens frequently, it indicates a system restriction or overcharge, requiring immediate diagnosis.

For Sany cranes and excavators operating in extreme cold climates (below -25°C), special considerations apply to the Sany Valve Assy-Control-Air-Conditioner. The change‑over valve may have slower response in cold conditions; allow the machine to idle for 10‑15 minutes before full HVAC operation. Use the recommended refrigerant oil viscosity for low‑temperature operation. Inspect O‑ring seals for hardening; replace if leakage is observed. Connector torque should be checked after the first cold cycle, as thermal contraction can reduce clamping force.

The Sany Valve Assy-Control-Air-Conditioner is also available as part of a complete cab climate system overhaul kit, which includes the valve assembly, the compressor, the condenser, and all necessary hoses and fittings. Sany recommends this complete‑kit approach for vehicles with over 8,000 operating hours, as it allows the entire HVAC system to be renewed in a single service event, eliminating the risk of hidden valve wear or seal degradation that could compromise operator comfort.

Fleet managers using this strategy report a 50% reduction in HVAC‑related breakdowns and a 40% reduction in total crane maintenance costs over the equipment’s life. Contact our parts specialists through the Get Quotation button above for custom kit configurations tailored to your fleet’s specific needs.