60357921 Bypass relief valve Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

60357921 Bypass relief valve Sany SY1350C1C3KH Tracked hydraulic excavator spare parts

As a core safety protection and pressure regulation component of hydraulic systems, the 60357921 bypass relief valve boasts four major advantages: “precise pressure regulation, stable unloading, low noise, and tight sealing.” It is widely used in the hydraulic circuits of excavators, loaders, and other construction machinery, as well as in the bypass circuits of oil filters and hydraulic valve groups. It undertakes the functions of overpressure bypass unloading, pressure stabilization, and circuit protection. Through the coordinated work of the pilot valve and the main valve, it automatically senses the system pressure. When overpressure occurs, it opens the bypass channel to release oil, suppressing pressure spikes, slowing down the rate of oil pressure rise, and improving circuit stability. It has strong adaptability and is easy to install and debug.
This product is made of high-quality materials and precision-machined, strictly adhering to GB/T 24919 and JB/T 10371 standards. The main body is made of 20# forged steel (stainless steel can be customized), the valve core is made of hardened alloy, and the seals are made of FKM fluororubber. Manufactured through multiple processes, it has a dense, defect-free structure, is resistant to high pressure, wear, and corrosion. The grooved pressure relief structure effectively reduces noise, solving problems such as inaccurate pressure regulation and seal failure, thus reducing maintenance costs. Its pilot-operated bypass structure offers high adjustment accuracy, is suitable for medium and high pressure conditions, and precisely matches the overpressure protection requirements of bypass circuits in engineering machinery.

Core technical parameters:

-Product Model: 60357921
-Product Name: Bypass Relief Valve (Pilot-operated, for bypass unloading and pressure stabilization)
– Compatible models/scenarios: Excavators, loaders, and other construction machinery; hydraulic circuits, oil filter bypasses, etc. (Specifications can be verified)
– Structure type: Pilot-operated bypass structure, consisting of pilot valve, main valve, etc., with grooved pressure relief structure, automatically senses pressure, can adjust the set pressure, and slows down the oil pressure rise rate.
– Material Specifications: Body: 20# forged steel (304/316L stainless steel can be customized), valve core: hardened alloy, seals: FKM, surface anti-corrosion treatment.
– Dimensions: Compatible with DN20 pipes, nominal diameter 20mm, valve body length 115mm, inlet/outlet diameter 20mm, internal thread M56×2, flatness ≤0.005mm, tolerance GB/T 1804-m
– Pressure parameters: Rated pressure PN31.5MPa, maximum pressure 94.5MPa, adjustment range 1.5-45MPa, error ≤5%, leakage ≤0.01ml/h, response time ≤12ms
-Mechanical parameters: Rockwell hardness HRC42-47, tensile strength ≥550MPa, impact toughness ≥85J/cm², flexible valve core, precise pressure regulation, smooth unloading, and low noise.
-Environmental parameters: Operating temperature -30℃ to 120℃, adaptable to dusty, oily, and high-vibration conditions, resistant to rust, aging, and hydraulic oil corrosion.
– Machining process: Precision forging + CNC turning + precision grinding + corrosion protection + pressure adjustment; burr-free surface, precise threads, and optimized groove structure for noise reduction.
-Installation method: Threaded connection, can be installed vertically or horizontally. Clean the interface and install according to the flow direction. Calibrate the pressure setting. Do not subject to violent installation or overload.
-Quality Standards: Compliant with GB/T 24919 and other standards, fully tested, accompanied by a certificate of conformity, and in compliance with hydraulic system safety regulations.
-Service life: ≥5000 hours under normal operating conditions, ≥3000 hours under high voltage and heavy load, far exceeding ordinary aftermarket products, extending system life.

Our 60357921 bypass relief valve undergoes rigorous testing and debugging, ensuring traceable quality and reliable after-sales service. We support bulk purchasing and customization, making it suitable for various bypass scenarios in engineering machinery. It meets the needs of overpressure unloading and pressure stabilization, making it the preferred component for the safe operation of hydraulic systems.

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