Posted on

Why Choose a 38R Self-Acting Control Valve?

There are several reasons why a 38R is a great choice in your heating or cooling applications, with the most obvious being that there is no power required. The 38R temperature regulator is a fully self-contained unit, requiring no external power source. This could mean substantial savings over the operation of other types of valves.

Regulation takes place when the sensing bulb  is exposed to changes in temperature. The thermal system is charged with a predetermined amount of vapor fill, which, when heated, will cause a bellows within the unit’s actuator housing to expand. As the bellows expands, it compresses a return spring while simultaneously moving the valve stem downward to stroke the valve.
When the process temperature decreases or in the event of thermal system failure, the return spring will move the valve stem upward to the “out” position. Continue reading “Why Choose a 38R Self-Acting Control Valve?”

Posted on

Pressure Transmitters: Increasing Efficiency and Safety

As industries such as building automation and water/wastewater become more energy-efficient, powder and bulk is also increasing energy efficiency using pressure transmitters and variable frequency drives. Pressure transmitter demand is also growing due to more stringent regulations in hazardous environments, where remote control and specialty housings must be available.

Photohelic® Pressure Switch/Gage, Series A3000

With a typical dust collection system, a pressure sensor (such as our Series A3000 or Series DHII) can measure differential pressure across filter bags. The sensor then sends a switched signal to a timer board (such as the Series DCT500A or DCT1000) to signal a filter cleaning. Pressure in the system is created by a blower, typically positioned near the filter banks on top of the hopper. The system can also use a level switch (like our Series PLS and Series CLS2) to signal a full hopper and possibly open a valve to empty the hopper. So how do pressure transmitters reduce energy consumption? And how can you prevent an explosion in a hazardous environment without the additional cost of specialty enclosures? Continue reading “Pressure Transmitters: Increasing Efficiency and Safety”

Posted on

Product Highlight: Hi-Flow™ Control Valves

Hi-Flow™ Control Valve

Hi-Flow™ control valves are single seated, top or cage guided globe valves – probably the simplest, from a construction standpoint, yet most versatile control valve in use. The Hi-Flow™ valve can fit applications with a smaller size valve since the valve has a greater flow capacity than most conventional valves of the same size. Coupled with a high flow capacity, the Hi-Flow™ valve maintains a wide rangeability of 50:1 to ensure precise control. Continue reading “Product Highlight: Hi-Flow™ Control Valves”

Posted on

Energy Savings from On-Demand Ventilation

Most local regulations for indoor air quality are designed around ASHRAE Standard 62. This standard specifies the minimum amount of outdoor air flow into an occupied space to be between 15 to 60 CFM per person, but more commonly building regulations require 15 to 20 CFM per person. Besides actually measuring the air flow, ASHRAE also defines indoor air quality using the concentration of carbon dioxide gas in the air. Carbon dioxide is recommended to be less than 1000 PPM. When sizing the air handling unit for a building, engineers will make the design exceed the maximum occupancy in the building or space to ensure that they will always be able to meet the minimum air requirements. In most cases, buildings or mix used spaces rarely are occupied at these maximum levels, thus the amount of conditioned air supplied is usually much greater than what is required. As building owners aim to reduce energy costs and operate buildings more efficiently, wasted energy of conditioning unneeded outside air has been a good place to start. Continue reading “Energy Savings from On-Demand Ventilation”

Posted on

Dwyer Instrumentation at Steamfitters 449 Training Center

Steamfitters 449 is a union training center that represents nearly 2,700 union-trained steamfitters and are affiliated with the United Association of Journeymen and Apprentices of the Plumbing and Pipefitting Industry of the United States and Canada.

According to the their website, members are highly trained craftsmen who fabricate, install, and service piping systems. Their craftsmen may be found on job sites involving single-family homes, garden and high-rise apartment buildings, supermarkets, food warehousing and processing facilities, power plants, chemical installations, factories, public buildings, and healthcare facilities.

Continue reading “Dwyer Instrumentation at Steamfitters 449 Training Center”