The sealing element is the first of the consumable parts of the reciprocating compressor, and the advantages and disadvantages of the sealing element determine the operating rate of the compressor.

The company opened up consultations and discussions on seals based on the sealed problems and empirical measures that have been dealt with.

1. The company collects and compiles the compilation of gas constants for compressors (dry, wet, neutral, chemical decomposition) and physical properties (at atmospheric pressure, the fire temperature in the air, the flammable explosion limit)

2. Develop common packing box standards

3, filled with PTFE, sealing element structure standard

4. Sealing materials for special gases and flammable and explosive gases

To lay the foundation for safe, efficient and long life of the compressor, strictly design, manufacture, assemble and operate

First, according to the compressor design parameters (medium, pressure, temperature)

1 design

(1), seal raw materials (recipe)

A. If the CO2 contains ethylene oxide, if the material is wrong, an exothermic explosion reaction will occur.

B. Acetylene is an unsaturated hydrocarbon. It is chemically active. It can decompose and polymerize at high temperatures. Carbon black and hydrogen are formed during decomposition. A large amount of heat is released, so that the gas temperature rises higher and higher, which will eventually lead to an explosion accident. For this purpose, it is specified that the compressor discharge temperature should be less than 100 °C.

B. Petroleum cracking gas, often containing heavy hydrocarbon gas (C4, C5, C6), can be polymerized into a milk at high temperature, which seriously affects the function of the seal and the valve. For this reason, the water temperature in the water jacket is high (60-80). °C), the exhaust temperature should be lower than 100 ° C

No medicine can cure all diseases, aspirin can not cure people, but can delay the disease. Sealing elements, like aspirin, do not cause accidents in many cases, but they have different degrees of discomfort in terms of sealing effect and life. If the sealing element contains improper filling materials, it will cause irreparable accidents such as oxygen. The compressor is on fire (even the cylinder, the piston is melting). High-purity nitrogen containing toluene gas, dry hydrogen, short-lived compressor seal, is an example.

(2) Structure

The structural form and group number of the piston ring, the support ring and the stuffing box are designed according to the pressure (difference) of each level.

It is safe to recover the structure of flammable, explosive and toxic and harmful gases, which is convenient for installation and disassembly.

 2, process manufacturing

 (1) From the mixing of raw materials to the natural aging of the blank, strictly control the order of the process, and strive to ensure the best crystallinity and porosity of the material.

 (2), mechanical processing, strict control of key dimensions, good important dimensional tolerances, relax the general size.

  3. Assembly and service

The function and life of the seal, in addition to the material and design of the seal, assembly is the decisive factor.

For a single seal, the fit and match are complementary.

For a good assembler, you should be proficient in the assembly of the compressor and the relationship with the seal to ensure the function and proper life of the seal.

4. Normal operation and operation of the compressor

When the compressor is running, the temperature rises frequently, the interstage pressure ratio increases or decreases, the gas volume regulating valve or the safety valve frequently takes off, the oil pressure and water pressure are normal, but the oil quantity and water temperature change occur, etc., which affect the sealing. The normal service life of the piece must be properly diagnosed for disposal.