Valve Removal and Installation of Reciprocating Gas Compressor | How to Remove and Install Valve скачать в хорошем качестве

Valve Removal and Installation of Reciprocating Gas Compressor | How to Remove and Install Valve

Compressor valves The essential function of compressor valves is to permit gas flow in the desired direction and to block all flow in the opposite (undesired) direction. Each operating end of a compressor cylinder must have two sets of valves. The set of inlet (suction) valves admits gas into the cylinder. The set of discharge valves is used to evacuate compressed gas from the cylinder. The compressor manufacturer normally specifies valve type and size. Plate valves constructed from rings connected by webs into a single plate are a common valve type. Depending on the sealing plate material, plate valves are capable of handling pressures as high as 15,000 psi, differential pressures to 10,000 psi, speeds to 2,000 rpm, and temperatures to 500°F. Plate valves do not perform well in the presence of liquids. Concentric ring valves are capable of handling pressures to 15,000 psi, differential pressures to 10,000 psi, speeds to 2,000 rpm, and temperatures to 500°F. Advantages of concentric ring valves include: Moderate parts cost Low repair cost The ability to handle liquids better than plate valves Poppet-style valves generally provide performance that is superior to both plate and concentric ring valves. The poppet style uses separate, round poppets to seat against holes in the valve seat. This type of valve offers high lift and low-pressure drop, resulting in higher fuel efficiency. Poppet valves are widely used in pipelines, gas conditioning, and processing facilities. Metallic poppets work well at: Pressures to 3,000 psi Differential pressures to 1,400 psi Speeds to 450 rpm Temperatures to 500°F Thermoplastic poppets can be applied to applications with: Pressures to 3,000 psi Differential pressures to 1,500 psi Speeds to 720 rpm Temperatures to 400°F Most compressors have valves mounted in the cylinders. A relatively new design concept places the valves in the piston. The valve-in-piston design (Fig. 9) operates with low valve velocities and provides longer life cycles and reduced maintenance time. In this video we will be learning how to remove and install the compressor valves may it be either a suction valve or a discharge valve of a reciprocating compressor. In most cases, if a compressor valve or valve gasket is leaking, it will create more heat. On a single-stage compressor, compare the operating temperatures of the two suction or discharge valves and cover plates to each other. If a valve or gasket is leaking, it will have a higher operating temperature. NOTE: This method will not be suitable for two-stage compressors if each stage does not have more than one valve. Each suction and/or discharge valve assembly is easily removed as a unit for inspection. If any part of the valve assembly is broken, the valve assembly should be replaced. If a compressor valve is leaking due to dirt or any other foreign material that keeps the valve plate and seat from sealing, the valve may be cleaned and reused. New gaskets and/or O-rings should be used to ensure a good seal.