B220401000688 Rotary motor delay valve Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

B220401000688 Rotary motor delay valve Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

The Sany B220401000688 rotary motor delay valve is a core control component of the rotary motor in Sany construction machinery. Specifically designed for the hydraulic circuit of the rotary motor, its core function is to precisely control the on/off state of hydraulic oil and delay pressure, enabling smooth start and stop of the rotary motion, buffering shocks, and preventing sudden stops or impact damage to components. It also has anti-cavitation function, protecting the precision internal structure of the rotary motor. It plays a crucial role in delayed pressure control, speed stabilization, buffering, and protection. Compatible with Sany and various mainstream construction machinery, it is widely used in the rotary systems of excavators, crawler cranes, and other models. Suitable for harsh working conditions such as mining and infrastructure, it is a preferred component for aftermarket maintenance, parts wholesale, and export.
This rotary motor delay valve relies on professional hydraulic valve manufacturing technology and strict quality control. The valve body is made of high-quality alloy steel, and the seals are made of oil-resistant nitrile rubber, which has high strength and excellent sealing performance. It is precision forged, CNC turned, quenched and tempered, and phosphated for corrosion protection. The dimensions are accurate and there are no burrs. The surface hardness of the valve body is HRC45-50, and the tensile strength is ≥600MPa. It is oil-resistant, corrosion-resistant, and deformation-resistant. It can accurately control the delay time and solve the pain points of delay loss, pressure instability, leakage, and cavitation. It extends the service life of the rotary motor and hydraulic system and is suitable for long-term use in harsh working conditions.

Core technical parameters:

– Product Model: B220401000688
– Product Name: Rotary Motor Delay Valve (Pressure-Controlled Buffer Type)
– Compatible Brands/Models: Sany excavators, crawler cranes, etc. (can be precisely matched to specific models)
– Material: The valve body is made of high-quality alloy steel, and the seals are made of oil-resistant nitrile rubber, which is corrosion-resistant, aging-resistant, and has strong sealing performance.
– Structure type: Integrated valve assembly structure with built-in delay control unit and one-way anti-cavitation structure, featuring precision interface and mounting hole.
– Surface hardness: valve body HRC45-50, tensile strength ≥600MPa, resistant to deformation, impact, and wear.
– Machining process: Precision forging, CNC turning, quenching and tempering, phosphating for corrosion protection, precision grinding, ensuring dimensional accuracy and burr-free operation.
– Accuracy class: GB/T 10095.1-2008 Class 7, high delay accuracy, conforms to original factory installation positions.
– Core dimensions: Total length 85mm, valve body diameter 45mm, interface diameter 20mm, 2 fixing holes (hole diameter 8mm)
– Delay performance: Delay range 0.5-3s (fine-tunable), precise pressure control, achieving smooth start and stop of rotation and buffering of shocks.
– Maximum working pressure: 25MPa, compatible with the normal working pressure of rotary motors, stable performance.
– Operating temperature: -40℃~180℃, suitable for harsh high and low temperature environments, seals are not prone to aging, and the anti-cavitation effect is stable.
– Service life: ≥10,000 hours (under normal operating conditions), corrosion resistant, leak-proof, precise timing, and long service life.
– Execution standards: GB/T 3077-2015, GB/T 13871.1-2007, ISO international certification, conforming to hydraulic valve industry standards.
– Weight: 0.45kg, lightweight design, adaptable to installation load, easy assembly, maintenance and replacement.

Sany B220401000688 rotary motor delay valve, with its superior materials, precision manufacturing process, and accurate parameters, is suitable for delay pressure control, speed stabilization, buffering, and maintenance/replacement of various engineering machinery rotary motors, meeting the needs of foreign trade, wholesale, and modification. The product undergoes rigorous testing and is defect-free. It is easy to install, oil-resistant, and corrosion-resistant, and is compatible with rotary motors, hydraulic circuits, and other components. It enhances delay pressure control, shock resistance, and cavitation resistance, preventing component damage, reducing downtime losses, and balancing cost-effectiveness and reliability.

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21 60221640 Pin
22 60221660 O-ring
23 60221647 Valve disc
24 60221643 Cylinder Block
26 60221659 Brake piston
27 60221644 Spring plate
28 60221663 Partition
29 60221645 Pressure Plate
30 60221646 Base Plate
31 60221655 O-ring
32 60221636 Piston
33 60221641 Drive shaft
34 60210759 Motor oil seal
35 60221652 Locking sleeve
36 60221630 Support ring
37 60221642 Pad
38 60221653 Rolling bearing
39 60221648 Protective Plate B
40 B220401000688 Rotary motor delay valve
41 150201010091A002 Sealed Package

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