The measurement and control system of the methane gas expansion compressor unit adopts the intelligent control instrument, PLC and unit condition monitor as the lower control level, and the industrial control computer as the independent distributed control system (DCS) of the upper monitoring operation station. Since the control and interlocking alarm functions of each part of the expansion compressor unit are respectively undertaken by the lower intelligent instruments, each instrument can be operated independently from the upper computer, and the automation and instrument can be highly dispersed. Even if the upper computer fails, the lower instrument can still guarantee the system. Normal operation, from this point, the PC/DCS system has better security and redundancy than the traditional DCS. The modules in the system are highly dispersed, using universal instruments, universal buses and protocols, which not only improve maintainability, but also are easy to expand and upgrade, and enhance the openness of the system.

When the inlet pressure of the turboexpander or the load of the compressor changes, the speed control system controls the turbine expander to maintain the set speed at the set value by changing the opening of the turbine expander inlet adjustable nozzle. The adiabatic efficiency of the expander remains at its highest value. The realization of the speed control system. The speed regulator adopts SDC-40 type intelligent regulator. The setting value of the speed can be set in the instrument panel. It converts the measured speed to 420mA current signal output, and is sent to the tracometer of the process site through the safety barrier. After entering the speed regulator, the speed regulator performs the PID calculation, controls the angle adjustment mechanism of the inlet of the expander, changes the intake air amount of the expansion end, and controls the rotation speed to stabilize at the set value. Realization of Speed ​​Control Under normal circumstances, the surge of the compressor is mainly caused by the load reduction, and the increase or decrease of the load is determined by the process.

For ROBEX Cylinder Seal Kit

The modern hydraulic cylinder Seal Repair kit is a kit used to repair hydraulic cylinder seals, which includes various sealing rings, O-rings, U-rings, oil seals, and other components required for hydraulic cylinder seals.
Hydraulic cylinder seals are a very important component in hydraulic systems, and their sealing performance directly affects the efficiency and lifespan of the hydraulic system.
When there is leakage or damage to the hydraulic cylinder seal, it is necessary to replace the seal in a timely manner.
The hydraulic cylinder seal repair kit has the following advantages:
1. High quality materials: The hydraulic cylinder sealing repair kit is made of high-quality materials such as rubber and polyurethane, which have good wear resistance, oil resistance, high temperature resistance, and other characteristics, ensuring the long-term stability and reliability of the sealing components.
2. Multiple sizes and specifications: The hydraulic cylinder sealing repair kit provides various sizes and specifications of sealing components, which can meet the needs of different models and specifications of hydraulic cylinders.
3. Easy to install: The seals in the hydraulic cylinder sealing repair kit are designed and manufactured according to the structure of the hydraulic cylinder, making installation very convenient. The seals can be quickly replaced, reducing maintenance time and costs.
4. Economical and practical: The hydraulic cylinder sealing repair kit has a relatively low price and can effectively extend the service life of the hydraulic cylinder, reduce maintenance costs, and is an economical and practical maintenance solution.
In short, the hydraulic cylinder seal repair kit is a very important hydraulic system maintenance tool, which can help users repair hydraulic cylinder leaks or damaged seals in a timely manner, ensuring the normal operation of the hydraulic system.

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Safe Seal Technology Co., Ltd. , https://www.sprsealkits.com