In-Situ, Inc. - Water Quality Instrumentation

In-Situ manufactures instruments for measuring water quality and quantity throughout industrial, commercial, institutional, and municipal settings. Watch the video to see broad range of scientific instruments designed and manufactured by the company for laboratory, process, and field use.

Get more detailed information, or share you water quality measurement challenges with a product application specialist.

Rotork Instruments Brands Join ISI Technical Group Product Portfolio

Midland brand air line filter regulator
Courtesy Rotork Instruments

ISI Tech Group now handles a large complement of the Rotork Instruments brand family throughout the Florida and South Georgia area. A number of well recognized brand names have been incorporated into the Rotork Instruments group of products in recent years and ISI now handles four of them.

Midland is a specialist manufacturer of stainless steel large flow air service equipment. Purpose specific, manufactured solutions for filtration and regulation of compressed air and gases is the specialty of the brand. Products include filters and regulators, poppet valves, spool valves, air pressure switches, flow regulators, and a host of specialized ancillaries that fill out a complete system installation.

The Fairchild brand, which has been on the roster of ISI Tech Group products for some time, offers a wide selection of electro-pneumatic transducers, pressure regulators, pneumatic relays, volume boosters, filters and accessories for process machine tool, robotic and other industrial applications. Products are available with designs to suit all environments, including hazardous areas.

M&M industrial solenoid valves
Courtesy Rotork Instruments

M&M International is also a Rotork Instruments brand. M&M solenoid valves are manufactured with high quality materials and to rigorous standards to deliver durable performance and high reliability. Robust construction makes these valves well suited for industrial applications. A choice of seal materials provides wide fluid compatibility. Products include general purpose solenoid valves, air actuated piston valves, automatic drain valves, and accessory products

Block and bleed needle valve assembly
Courtesy Rotork Instruments

Bifold, another Rotork Instruments brand, manufactures medium pressure instrumentation ball valves, needle valves, fittings, manifolds, and relief valves for applications with pressure up to 20,000 psi.

This expanded product offering empowers the process measurement and control specialists at ISI Tech Group to better serve the diverse requirements of their customer base. Share your automation and process control challenges with experts, combining your own knowledge and experience with their product application expertise to develop effective solutions.

New Company Logo for Instrument Specialties

Instrument Specialties Inc. (ISI), is a long-standing, premier manufacturer's representative and distributor of industrial instrumentation in the Georgia and Florida areas of the US. The company has recently changed its logo, trade name, and website URL. We wanted to share them with you here.

The company is the same, but the new logo and trade name of ISI Technical Group will be used going forward. There is also a new website address.

www.ISI.group

Be sure not to tack ".com" onto the end of what is shown above. Try it out.

Share your process instrumentation and control challenges with the specialists at ISI Technical Group. Combining your own process knowledge and experience with their product application expertise will yield an effective solution.

Purging Differential Pressure Sensor Lines

Differential Pressure Transmitter
Courtesy Krohne

In a fluid system, differential pressure measurement can be utilized in conjunction with a known restrictive element in the flow path to produce a flow measurement. Manufacturers of process measurement and control apparatus often produce application notes that reflect their experience or knowledge about specific circumstances that may create problems for users and operators. The application notes outline the circumstances that create the potential for trouble, then go on to show a method of prevention, mitigation, or elimination of the problem condition.

Brooks Instrument, globally recognized innovator in precision measurement and control of flow and pressure, has produced an application note that deals with differential pressure transmitter sensor lines and how to prevent them from being fouled by accumulation of media residue. The application note is included below and also appears in the Brooks Instrument blog.

Share your process measurement challenges and requirements with product application specialists, combining your own process knowledge and experience with their product application expertise to develop effective solutions.

Differential Pressure Transmitter Sensor Line Purge Setup from Instrument Specialties, Inc.

Innovative Boiler Water Level Gauge Delivers High Visibility

The Simpliport boiler water level gauge provides the type of performance always wanted by operators. It is visible from great distance at angles up to 180 degrees. The brightly illuminated display clearly shows what portion of the boiler contains water and what portion contains steam.

The short video provides a good demonstration. More information is available from steam system specialists. Share your combustion and steam system requirements and challenges with experts, combining your own knowledge and experience with their product application expertise to develop effective solutions.

Power System Surge Protection Device

Line Surge Protective Device
Courtesy Dehn, Inc.

Investments of time and financial resources to operate any business process can have their yield crushed in the blink of an eye by power system anomalies. Businesses and processes run on electric power. Greater levels of IT complexity, process instrumentation, or other electrical equipment generally bring higher levels of exposure to power line surges that can bring unexpected downtime or equipment damage to a going concern.

Prevention through protection is the only available course of action for hardening facilities to the potentially damaging effects of line surges. Dehn, Inc. manufactures products that provide solutions for lightning and surge related problems. Surge protectors and lightning current arrestors, available as compact DIN rail mounted units, function as protective devices for motors, IT equipment, process controls, and instrumentation.

The video below provides a view of how the protective devices function. Without a protection plan in place, any facility is exposed to potential damage. Share your plans and challenges with a product application specialist, combining your facilities knowledge with their product application expertise to develop an effective solution.

Control Valve Flow Characteristics

Industrial Control Valve
Courtesy Flowserve - Valtek

Flow characteristics, the relationship between flow coefficient and valve stroke, has been a subject of considerable debate. Many valve types, such as butterfly, eccentric disk and ball valves, have an inherent characteristic which cannot be changed (except with characterizable positioner cams). Flow characteristics of globe valves can be determined by the shape of the plug head.

The three most common types of flow characteristics are quick opening, equal percentage and linear. The adjacent figure shows the ideal characteristic curve for each. These characteristics can be approximated by contouring the plug. However, inasmuch as there are body effects and other uncontrollable factors, plus the need for maximizing the flow capacity for a particular valve, the real curves often deviate considerably from these ideals. When a constant pressure drop is maintained across the valve, the characteristic of the valve alone controls the flow; this characteristic is referred to as the “inherent flow characteristic.” “Installed characteristics” include both the valve and pipeline effects. The difference can best be understood by examining an entire system.

Control valve flow properties
Courtesy Flowserve - Valtek

Equal Percentage

Equal percentage is the characteristic most commonly used in process control. The change in flow per unit of valve stroke is directly proportional to the flow occurring just before the change is made. While the flow characteristic of the valve itself may be equal percentage, most control loops will produce an installed characteristic approaching linear when the overall system pressure drop is large relative to that across the valve.

Linear

An inherently linear characteristic produces equal changes in flow per unit of valve stroke regardless of plug position. Linear plugs are used on those systems where the valve pressure drop is a major portion of the total system pressure drop.

Quick Open

Quick open plugs are used for on-off applications designed to produce maximum flow quickly.

This information provided courtesy of Flowserve Valtek. Share your control valve requirements and challenges with a valve specialist, combining your own process knowledge and experience with their product application expertise to develop effective solutions.