Sponsored by M.S. Jacobs & Associates, a manufacturer’s representative and distributor of industrial instrumentation, control valves & process controls. Located in Pittsburgh, Pa. and covering Western Pennsylvania, West Virginia, and New York. Representing top lines in pressure, temperature, level, flow, analytical instruments and industrial valves.
Telephone: 800-348-0089 or MSJacobs.com
Happy Holidays from M.S. Jacobs and Associates
On behalf of everyone at M.S. Jacobs and Associates, we wish you a very Happy Holiday Season and a prosperous New Year!
When to Use Pressure Gauge Accessories
Pressure Gauge (Wika) |
Accessories for a pressure gauge may be the extra step needed for a successful, proactive, preventative maintenance program and for extending the life of pressure gauges in environments like oil and gas, petrochemical, and chemical plants. When a pressure gauge is paired with a mini-siphon, the gauge is protected from harmful steam, vapors and liquids. When a pressure gauge is paired with an overpressure protector, the gauge is protected from pressures exceeding its maximum pressure rating. When a pressure gauge is paired with a diaphragm seal, the gauge is protected from hot, viscous, contaminated or corrosive media. When a pressure gauge is paired with a snubber, the gauge is protected from pressure pulses.
Volume Booster Working Principle
Pneumatic Volume Booster (Fairchild) |
The volume booster is connected to the supply line and the output plumbing. It receives a pneumatic control signal, however, from another device, such as a transducer, valve positioner or other control means.
This pneumatic signal controls the pressure into and out of the booster, while allowing the booster to flow the maximum volume of the supply line. Boosters may also be referred to as pilot-operated regulators, as your control or pilot signal maintains the pressure control.
The regulated output of a pneumatic air volume booster can be any of the following:
- A direct reproduction of the pneumatic control signal
- A multiple of the pneumatic control signal
- A fraction of the pneumatic control signal
The volume booster ratio is the multiplier or divider of signal pressure to output pressure. For example, a 2:1 ratio means output pressure is 1/2 the signal pressure. Similarly, a 2:1 ratio would provide output pressure twice the signal pressure. Note, however, the output pressure can never exceed the supply pressure to the booster.
Often the signal pressure is lower than the supply pressure because a control device (valve positioner, I/P, etc.) will only handle a lower supply pressure.
Solenoid Valve Application Tip
Solenoid Valves (courtesy of GC Valve) |
Solenoid valves are your fastest-acting option when controlling flow. They can be repaired in-line (without breaking plumbing connections in most designs), and they can be less costly than other electrically operated valves.
But there are a few measures that can increase your satisfaction with solenoid valves:
Install strainers or filters to prevent foreign materials from entering the valve and interfering with operation.
But there are a few measures that can increase your satisfaction with solenoid valves:
Install strainers or filters to prevent foreign materials from entering the valve and interfering with operation.
- Avoid Teflon tape; those stringy leftover pieces can travel downstream and hang up in the valve.
- Use pipe dope sparingly; globs of it in the line can affect solenoid valves and other control elements.
- Add check valves to your design if it is important to prevent back flow through the solenoid valve.
- Consider plumbing solenoid valves in series (double-block) where any leakage is unacceptable.
- Ask for a plated operator to protect special grades of stainless steel from corrosion.
For more information, or assistance with selecting solenoid valves, contact:
M.S. Jacobs
810 Noblestown Road
Pittsburgh, Pa 15205
Toll free (800) 348-0089
www.msjacobs.com
Email: msjacobs@msjacobs.com
Process Control Products for Shale Gas Extraction, Processing and Transport
The Marcellus Formation, one of the largest shale gas resources in North America, sits directly under much of M.S. Jacobs area of coverage. Many of the product lines they handle are needed in the extraction, processing and transport of the shale gas.
Global Thermoelectric TEG (thermoelectric generator) |
Flexim Midstream Gas Meters |
M.S. Jacobs also provides Magnetrol level controls and Orion visual level indicators for various level applications as well as valves and controls on other midstream and downstream applications.
There has been an explosion of midstream processing facilities in this area. Many processing companies have set up facilities to strip the propane and butane from the rich Marcellus “wet gas” and send the methane downstream for use in our homes. M.S. Jacobs has become a primary partner to many of these processing companies because of our application skills, local inventory, and support.
Magnetrol ECHOTEL Ultrasonic Level Switch Operating Principle
The Magnetrol ECHOTEL utilizes ultrasonic energy to detect the presence or absence of liquid in a single or dual point transducer. Ultrasonic contact level technology uses high-frequency sound waves that are easily transmitted across a transducer gap in the presence of a liquid media, but are attenuated when the gap is dry. The ECHOTEL switches use an ultrasonic frequency of 2 MHz to perform this liquid level measurement in a wide variety of process media and application conditions.
The transducer uses a pair of piezoelectric crystals that are encapsulated in epoxy at the tip of the transducer. The crystals are made of a ceramic material that vibrates at a given frequency when subjected to an applied voltage. The transmit crystal converts the applied voltage from the electronics into an ultrasonic signal. When liquid is present in the gap, the receive crystal senses the ultrasonic signal from the transmit crystal and converts it back to an electrical signal. This signal is sent to the electronics to indicate the presence of liquid in the transducer gap. When there is no liquid present, the ultrasonic signal is attenuated and is not detected by the receive crystal.
For more information on industrial level control, contact M.S. Jacobs and Associates.
The transducer uses a pair of piezoelectric crystals that are encapsulated in epoxy at the tip of the transducer. The crystals are made of a ceramic material that vibrates at a given frequency when subjected to an applied voltage. The transmit crystal converts the applied voltage from the electronics into an ultrasonic signal. When liquid is present in the gap, the receive crystal senses the ultrasonic signal from the transmit crystal and converts it back to an electrical signal. This signal is sent to the electronics to indicate the presence of liquid in the transducer gap. When there is no liquid present, the ultrasonic signal is attenuated and is not detected by the receive crystal.
For more information on industrial level control, contact M.S. Jacobs and Associates.
Introduction to Level Measurement
In many industrial processes, the measurement of level is critical. Depending on the nature of the material being measured, this can be a simple or complex task. Several different technologies for sensing level are briefly explained here.
Gauge or Sightglass |
Level Gauges or Sightglasses
The simplest form of level measurement for direct measurement of level (almost always visually) in a vessel. A level gauge (sightglass) is usually a clear tube connected to the a vessel at the highest and lowest part of the level range. The fluid level inside the vessel will be at the same hight as the level in the tube.
Labels:
bubbler,
capacitance,
displacer,
echo,
float,
gauge,
hydrostatic,
level control,
sightglass,
ultrasonic
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