Wednesday, July 27, 2016

Hayward Announces New Electric Valve Actuator Line

electric valve actuators with manual override
New HRS Series Electric Valve Actuators
Courtesy Hayward Flow Control
Hayward Flow Control issued a press release in early June announcing the introduction of its HRS Series of quarter turn electric valve actuators. The actuators complement the company's companion lines of fluid process products, including thermoplastic valves, strainers, filters, controls, bulkhead fittings and tank accessories, and corrosion resistant pumps.

The new HRS line provides practical features and benefits to users.
  • Product torque range from 300 in-lb to 177,000 in-lb
  • Aluminum housing with powder coat
  • Double square drive socket, ISO5211 compliant mounting
  • On/Off or Proportional Control  with 2-10 vdc or 4-20 ma inputs and outputs
  • NEMA 4/4X/IP67 enclosure rating
  • Range of available AC and DC voltages
  • Integrated local control station
  • Visual position indicators
  • CSA Certified, UL439
  • Two Year Warranty
There are numerous variants that can be configured using base models and available options. For more detail, contact a product specialist. Share your fluid process control challenges with them, combining your process knowledge with their product application expertise to produce the most effective solutions.


Tuesday, July 19, 2016

Tank Overfill Protection - Level Measurement Technology Resources for Best Results

crude oil storage tanks with overfill protection level measurement
Crude oil storage tanks, a beneficiary of overfill protection
Industrial liquid processing often includes tanks or other vessels for the storage or combining of product components, raw materials, or finished product. Regardless of the nature of the liquid, overfill and spillage are of concern due to economic loss, downtime, and the creation of hazardous conditions. Good practice calls for detection of overfill conditions in a reliable manner which will provide operators notice of the condition in time to avoid spillage.

Magnetrol®, a globally recognized leader in the field of liquid level measurement, has created a set of resources to help customers understand the need for overfill protection and properly establish a protocol. Different industries and products will have varying levels of risk or hazard, thus different governing standards. The basic benefit to overfill protection is the same throughout...whatever is in the tank should be contained. Included below is one of several resources provided by Magnetrol® to address the issue of overfill protection. You can get the entire set by contacting level control specialists.

There are a number of technologies employed in the measurement of liquid level. Each has its own set of attributes that may prove advantageous for a particular application. Share your level measurement and control challenges with a product application specialist. Combining your process expertise with their product application knowledge will produce effective solutions.



Monday, July 11, 2016

Level Measurement: Comparing Displacer Transmitters and Differential Pressure Transmitters

diagram of displacer level transmitter for process measurement and control
Electronic Displacer Transmitter
Courtesy Magnetrol
Liquid level measurement is ubiquitous throughout industrial fluid processing operations. Whether via direct or inferential means, the fluid level data point is an integral part of operational and safety plans for an installation.

Magnetrol, a globally recognized leader in the design and manufacture of level measurement instrumentation, has produced a comparison of displacer transmitters and differential pressure transmitters applied to liquid level measurement.

What is a displacer transmitter?


Displacer transmitters are considered a direct means of level measurement.

Quoted from Magnetrol website page on displacer transmitters...
Electronic displacer level transmitter technology operates by detecting changes in buoyancy force caused by liquid level change. These forces act upon the spring supported displacer causing vertical motion of the core within a linear variable differential transformer.
As the core position changes with liquid level, voltages are induced across the secondary windings of the LVDT. These signals are processed in the electronic circuitry and used to control the current in the 4-20 mA current loop. The enclosing tube acts as a static isolation barrier between the LVDT and the process media.

 How does a differential pressure transmitter measure liquid level?


Liquid level can be inferred through the measure of the pressure generated by the column of liquid in a tank or vessel. The measurement device must be calibrated for the specific gravity of the measured media in order to attain reasonably accurate results. There are a number of installation arrangements of differential pressure transmitters that will accommodate tanks open to atmosphere, closed pressurized tanks, and more.

The comparison is included below and provides some interesting points to consider. Share your level measurement application challenges with a product application specialist. Combining your process experience and knowledge with their product application expertise will produce the best solutions for your process measurement needs.



Tuesday, July 5, 2016

SVF Flow Controls Explains Surface Roughness for Valves Intended for Special Applications

Socketed and flanged ball valves for industrial process control
Vales utillized in industrial processes
can require special materials or finishes.
Fluid control operations can sometimes require special materials of construction or finishes for piping and specialties, like valves. A segment of the industrial valve manufacturing sector specializes in providing fluid control valves with coatings, surface finish, and materials of construction suitable for the requirements of applications not well serviced by more common constructions.

One manufacturer, SVF Flow Controls, has published a short article explaining some of the basics about surface finish. The article defines surface finish and goes on to describe some of the methods employed to achieve various levels of surface roughness and texture. The article, included below in its entirety, is short and informative.

Share your specialty valve applications with product experts. The combination of your process expertise and their product knowledge will produce the most effective solutions.