Wednesday, April 27, 2016

Concepts of Process Instrument Calibration

Volumetric calibration rig
Volumetric calibration rig
Measuring devices are an integral part of our lives nowadays, whether in everyday life or on the job. Take, for example, the scales at the supermarket check-out, the fuel volume measurement at the filling station pump, temperature measurement, velocity, flow volume and thermal energy, taxi meters etc. The wide variety of available quantities to be measured and measuring devices clearly illustrates the complex interplay between the quantity to be measured and the measuring device used. What does "accurate" actually mean in this context and how is this accuracy demonstrated? Why do we need accurate measuring devices?

Using the example of flowmeters, the following document will go into detail about these and other aspects of calibration and accuracy, and also looks at calibration standards from different countries around the world.


For more information regarding process instrumentation and calibration, contact:

Instrument Specialties Inc.

3885 St. Johns Parkway
Sanford, FL 32771
phone 407.324.7800
fax 407.324.1104
www.isisales.com

Friday, April 15, 2016

Lightning and Surge Protection for Potentially Explosive Atmospheres

Plant Lightning Protection
Protect your plant's hazardous area
from lightning strikes and surges
.
During producing, processing, storing and transporting flammable substances (e.g. fuel, alcohol, liquid gas, explosive dusts), potentially explosive atmospheres where no ignition sources may be present to prevent explosion frequently occur in chemical and petrochemical industrial plants. The relevant safety regulations describe the risk for such plants posed by atmospheric discharges (lightning strikes). In this context, it must be observed that there is a risk of re and explosion resulting from direct or indirect lightning discharge since in some cases these plants are widely distributed.

To ensure the required plant availability and safety, a conceptual procedure is required to protect parts of electrical and electronic installations of process plants from lightning currents and surges.

The white paper below, provided by DEHN,  provides an in-depth strategy on plant protection and safety from lightning strikes and surges in hazardous areas.


For more information, contact:
Instrument Specialties Inc.
3885 St. Johns Parkway
Sanford, FL 32771
phone 407.324.7800
fax 407.324.1104

Thursday, April 7, 2016

The Valtek Control Valve: Understanding the Components

Valtek control valves
Flowserve (Valtek) control valves
Valtek control valves are also known for handling the most severe services: cryogenic, superheated steam, volatile and corrosive fluids, erosion, high pressure drops, vibration, cavitation, flashing, and high noise levels.

Valtek valves are equipped with spring cylinder or spring diaphragm actuators that provide the thrust and speed necessary to manage any service. Valtek four-way analog and digital positioners provide accuracy and response to handle the most exacting applications.

This video gives the viewer an understanding of the major components.


For more information, contact:
Instrument Specialties Inc.
3885 St. Johns Parkway
Sanford, FL 32771
phone 407.324.7800
fax 407.324.1104
e-mail: offices@isisales.com