Bulk electric flow control valve for cement equipment

The electric flow control valve for bulk cement is standardized under the Chinese Building Materials Industry Standard JC/T 609-1995. This standard outlines the product classification, technical specifications, testing procedures, inspection rules, marking, packaging, transportation, and storage requirements for electric valves used in cement bulk flow control. It applies specifically to electric cement flow control valves (referred to as flow control valves). This standard references several other key standards, including GB/T 1804 for general tolerances, GB 9439 for gray cast iron, JC 401.2–401.4 for steel castings, JC 532 for welding, JC/T 402 for painting and rust prevention, JC/T 406 for packaging, and ZB Q92 002 for air conveying chutes. The flow control valve consists of a cylindrical flow valve and an electric actuator. Its model designation follows a specific format: FL D □, where the last digit represents the nominal inlet diameter in millimeters. For example, an electric flow control valve with a 300mm nominal inlet size would be labeled as FLD 300 JC/T 609. Key parameters include the feeding port diameter, maximum flow rate, flow area, and electric actuation angle. The maximum flow rate is calculated assuming a material flow velocity of 3 m/s. Technical requirements cover basic manufacturing compliance, installation conditions, performance criteria, assembly procedures, surface finish, and appearance quality. The valve must operate reliably, maintain tight seals, and meet specified electrical and mechanical performance standards. Testing includes no-load and load tests, ensuring proper function, leak-free operation, and accurate control of material flow. Each product must pass factory inspection before being released, with type inspections conducted under specific conditions such as new product development or major design changes. Marking, packaging, and storage guidelines ensure proper identification and protection during transport and storage. The standard was developed by the Building Materials Machinery Standardization Technical Committee, with contributions from several leading institutions and experts. This comprehensive standard ensures the quality, reliability, and safe operation of electric flow control valves in cement handling systems, meeting both national and industry-specific requirements.

Excavator Cylinder Piston Seals

Precautions for the installation of hydraulic cylinder piston seals in excavators
1. The sealing of the oil cylinder piston should use products of reliable quality to ensure good sealing performance.
2.Before installing the oil cylinder piston seal, the seal and sealing groove should be cleaned to ensure that the sealing surface is free of impurities.
3. When installing the seal, the correct installation sequence and direction should be carried out according to the drawing requirements to ensure the correct installation of the seal.
4.When installing the seal, special tools should be used to avoid using sharp tools and hard objects to damage the seal.
5. When installing the seal, attention should be paid to whether the seal groove is damaged or worn. If so, it should be replaced or repaired in a timely manner.
6. When installing the seal, an appropriate amount of lubricating oil should be applied to avoid friction damage to the seal during installation.
7.When installing the seal, it should be ensured that the compression of the sealing ring meets the requirements to avoid excessive or insufficient compression leading to seal failure.
8.After installing the seal, a sealing test should be conducted to ensure that the sealing performance meets the requirements.

Hydraulic cylinder piston seals, hydraulic cylinder seal, boom seal

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