LNG_LPG_CNG_Cryogenic_SWAS_CEMS_LACT_Sampling and Analysis systems

22/09/2024

https://www.facebook.com/share/p/KpEuPECkszoe5d9k/

31/08/2022

Cylinder Configuration
Liquefied Gas Sampling
CSF1-Expansion Chamber Configuration

Features:
• Sampling directly from process or system.
• Pressure range from 0 to 1450 psig (0 to 100 bar).
• Closed sampling.
• Representative sample.
• Sample circulation.
• Equipped with pressure relief system, safe for sampling.
• Linkage ball valve design, easy operation.

30/08/2022

Solenoid valves:

Solenoid valves convert electrical energy to mechanical energy, which causes a magnetic response. The solenoid activates when an electrical current comes through the wire coil. When activated, solenoids in hydraulic valves and pneumatic valves control the flow of fluid when a fluid power system is in motion. There are many different types of solenoid valves available, though direct-acting and pilot-operated valves are the two main categories. When selecting a solenoid valve, it is important answer questions about the application and ensure that you are choosing a suitable valve.

Types of solenoid valves:

Direct-acting valves:

Solenoids in direct-acting valves open the valve magnetically through direct action, hence the name. The coil pushes and pulls a shaft and causes the seat of the valve to shift. When there’s no electrical current, the spring coil returns to the default position. Direct-acting valves need full power to operate the valve. Whether that position is normally open or normally closed depends on the application.

In an energized normally closed valve, the inlet pressure is released when the solenoid coil retracts, thereby allowing the fluid to pass through the outlet. The solenoid coil is typically larger in a direct acting valve, compared to a pilot operated valve.

Pilot-operated valves:

Pilot operated valves use the pressure of the fluid in the line to open the valve. One of the benefits is the ability to use a smaller coil and a lower cost. Although pilot-operated valves uses less electrical power, you must have the available pressure to operate the valve.

Operation:

Normally Closed vs. Normally Open:

Normally Closed:

The valve remains in the “Closed” position when de-energized and is the most common method of operation. Generally, you will find Normally Closed valves being used in On/Off or venting applications here you want the process to stop when there is a loss of power. In the event of power loss, the valve closes and the fluid will not exhaust.

Normally Open:

The valve remains in the “Open” position when de-energized. The most common uses of Normally Open valves are safety applications where the process is exhausted when there is loss of power.

07/05/2022

I uploaded a picture with a brief description about an air header.
Some readers asked about why needle valves are recommended instead of ball valves at air headers?
1. Usually needle valves are used at air headers; reason is slowly and smoothly releasing air supply to equipment and avoiding other equipment malfunction during releasing this activity.
2. Handle of ball valves can be operated during nearby passing of operator / technician. Please check picture of an air header, its handles of valves are removed and are in custody of operator and he kept one handle in his approach during his shift to handle emergency situation.
(Now a days, lock at handles are available but still at a

05/03/2022

LESER LNG POSVs support high plant efficiency in the liquefaction process

01/03/2022

𝗢𝘃𝗲𝗿𝗽𝗿𝗲𝘀𝘀𝘂𝗿𝗲 𝗽𝗿𝗼𝘁𝗲𝗰𝘁𝗶𝗼𝗻 𝗳o𝗿 𝗟𝗡𝗚 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀

14/02/2022

03/12/2021

ANALYZER SAMPLE SYSTEMS

Some analyzers measure the composition of a process stream by directly immersing the sensing element in that stream. This is called in situ measurement, which is a Latin phrase meaning “in the place.”

A pH probe inserted into a process pipe, an oxygen probe inserted into the stack of a combustion furnace, and a GFC analyzer measuring the concentration of a gaseous pollutant by shooting a light beam across a process room are all examples of in situ analyzers: the analytical sensing takes place directly within the process environment.

Alternatively, analytical sensing elements may be located some distance away from the process, in which case a representative sample of that process stream must be conveyed to the analyzer for measurement. A great many industrial analyzers function like this, with a system of tubes, heaters, filters, pumps, regulators, and other components working together to provide the remotely located analyzer with a steady stream of process fluid to sample. It should be noted that quite often problems experienced with process analyzers stem from improperly constructed and/or maintained sample systems.

A very simple sample system for a pH analyzer is shown here, the purpose for it being to allow the pH electrode to operate at atmospheric pressure instead of the high pressure inside the process pipe (Note):

Note : In-situ pH probes are manufactured for high-pressure applications, but they suffer short lifespans (due to the accelerated erosion of the measurement glass) and decreased sensitivity (due to the extra thickness of the measurement glass) and are substantially more expensive than pH probes designed for atmospheric pressure conditions.

Liquid from the process pipe flows through the isolation and flow-control valves, the rate of flow restricted to a mere trickle, where it continuously fills a sample chamber and overflows into a process sewer designed to transport a constant stream of process liquid. If for some reason a process sewer drain is unsafe, environmentally destructive, or impractical, one may replace the overflow tube with a level control system and pump to re-inject the sample back into the process line. This, of course, adds complexity and expense to the sample system.

Credit: Instruments Tools

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28/10/2021

HOKE Sample Cylinders! Safest and only differentiated cylinders in the world.

1) High Tolerance NPT Connection
2) Formed Single Piece Design
3) Internal Neck Connection
4) Roughed Edges for Visual ID & Safer Handling

Available in Monel and 316ss alloys

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