T/CI 043-2023 Built-in pressure feedback control integrated valve

Scope

Scope: This document specifies the basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation, and storage of built-in pressure feedback control integrated valves (hereinafter referred to as "integrated valves"). This document applies to integrated valves used in the suspension systems of tractors with a power of less than 120 horsepower. An integrated valve refers to a control valve that combines various functions in a single valve body and is connected through internal flow channels. Main technical contents: 5.2.1 Pressure resistance: Under 1.5 times the nominal pressure, the integrated valve shall not exhibit external leakage or component damage. 5.2.2 Internal leakage performance: Under the condition of input nominal pressure and flow rate, when the main sliding valve rod is in the upward position, the output flow rate from the leakage port shall not exceed 20 ml/min. 5.2.3 Pressure retention performance: When the valve rod is in the neutral position, the pressure at the outlet shall not decrease by more than 1 MPa within 2 minutes. 5.2.4 Pressure retention range: Under rated working conditions, the pressure retention range of the integrated valve shall be adjustable within 1 mm to 2 mm. 5.2.5 Operating performance: Under rated working conditions, the integrated valve shall operate continuously without sticking, and the operating force shall be within 50 N to 100 N. 5.2.6 Sealing performance: Under rated working conditions, there shall be no leakage at the static sealing point and no dripping at the dynamic sealing point of the integrated valve. 5.2.7 High-temperature resistance: After the 110℃ heating test, all components of the integrated valve shall function normally, and there shall be no leakage at the installation surface connected to the body. 5.2.8 Durability: Under rated working conditions, after 200,000 actuations, the components of the integrated valve shall not exhibit abnormal w

Development Information

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