Showing posts with label solenoid valve. Show all posts
Showing posts with label solenoid valve. Show all posts

Friday, December 29, 2017

How New Lead-Free Regulations Will Impact Your Selection Of Potable Water Valves

Potable Water Regulations
Bottom line: Get the lead out.
Recent legislation in several states has tightened regulation of lead content in the components of potable (drinkable) water treatment systems. Other states may well be considering similar moves. This pace of regulation seems unlikely to slacken.

This report examines the choices facing specifiers and purchasers of small solenoid valves for potable water systems. It weighs the advantage and disadvantages of brass, plastic, and stainless steel designs. Finally, it suggests the solutions that smart planners should consider for current and future use.

You can download the full report (courtesy of ASCO Valve) here, or you can view it below in the embedded viewer.

Tuesday, May 31, 2016

Solenoid Valve Operating Principle

solenoid magnetic field
Solenoid magnetic field
A solenoid is an electric output device that converts electrical energy into a linear mechanical force.

At its most basic level a solenoid is an electromagnetic coil that uses magnetism produced by the flow of current to physically move the armature of a solenoid. The armature that is movable can be a rod or a metallic arm. One of the most common uses of solenoids are as the operators of valves.

A plunger solenoid contains a movable iron rod that is inserted into a coiled cylinder. The rod is connected to a plate with two contacts. With the aid of a spring the contacts are normally open. When an electrical current passes through the coil, it generates a magnetic field that attracts the rod into the coil chamber. The movement of rod will move the contacts into a closed position. When the current is turned off the magnetic force is removed and the tension in the spring forces the rod back out to its original resting position. This back-and-forth motion of the rod to control a circuit is used to operate a variety of mechanical devices such as valve seats and pneumatic poppets.

solenoid valve
Solenoid valve components
A solenoid valve is a combination of two basic functional units:
  • The solenoid (electromagnet) described above.
  • A valve body containing one or more orifices.
ASCO solenoid valve
ASCO Redhat Solenoid Valve
Flow through an orifice is controlled by the movement of the core when the solenoid is energized or de-energized. The core is enclosed in a sealed tube, providing a compact, leak tight assembly.

This video provides a very basic visual understanding of the solenoid operating principle and how the mechanism works. From this video it is easy to understand how the linear movement created by the solenoid can be transformed into the movement necessary to open and close solenoid valves.




For more information about solenoid valves, contact:
Ives Equipment
877-768-1600

Thursday, January 28, 2016

Composite Solenoid Valves for Reverse Osmosis Water Systems

reverse osmosis system
Typical reverse osmosis system
(courtesy of Wikipedia)
Reverse osmosis (RO) is one of the most popular methods for effective water purification. It has been used for years to purify contaminated water, including converting brackish or seawater to drinking water.

Reverse osmosis is a process in which dissolved inorganic solids (such as salts) are removed from a solution (such as water). This is accomplished by pushing the water through a semi permeable membrane, which allows only the water to pass, but not the impurities or contaminates.

Reverse Osmosis can deliver bottled-water quality safety and taste by removing over 99% of dissolved minerals, chlorine and contaminants. Many leading bottled-water companies actually use large-scale RO to produce their water.

Reverse osmosis systems are found in several drinking water applications from restaurant, food and beverage equipment to grocery store produce misting.

The ASCO Series 212 solenoid valve is designed for these type systems. The valves come with NSF approvals for use in drinking water systems and also is design with unique “FasN” quick connection system. The valves are designed to handle 150 psi up to 180 deg. F. and has low wattage coils in both AC and DC.

See the video below for an illustration of where these valves are used in RO systems.

Tuesday, September 8, 2015

Electronically Enhanced Solenoid Valves - Voltage Ranging Valves

Voltage Ranging Valves
Electronically Enhanced
Solenoid Valves
Voltage Ranging Valves
(courtesy of ASCO)
New power management technology is rewriting industry standards for reliability and power consumption of solenoid valve coils. The new technology solenoid valves accepts both AC and DC voltages while improving performance. Available in 2-way, 3-way and 4-way, these solenoid valves are designed to handle most fluid control applications.

The enhanced valves are designed to be drop in replacements for existing valves. There is no change to functional attributes such as flow, pressure, ambient & fluid temperatures or physical attributes such as envelope size and face-to-face dimensions. If you're looking to just switch out a coil,  enhanced coil kits are direct replacements for the old coil kits.

Here are the benefits to end customers:

Lower Power Consumption
  • 1.0 watt (DC version) & 1.5 watts (AC/DC versions)
  • Lowers energy cost up to 80% compared to standard solenoid valves 
RoHS 2 Compliant
  • Satisfies CE Directives 2002/95/EC and 2001/65/EU (RoHS 2) for the restriction of hazardous substances 
Supervisory Current Compatible
  • Suitable for systems employing supervisory currents not exceeding the following drop-out currents:
    • 20mA (12-24V DC), 15mA (24-120V AC/DC) and 7mA (100-240V AC/DC) 
  • Also suitable with devices having leakage currents not exceeding the drop-out currents noted above. 
Broad Voltage Ranges Reduce Inventory
  • Available in 24-120V AC/DC, 100-240V AC/DC & 12-24V DC 
  • Covers hundreds of global voltage requirements
  • Simplifies product selection and reduces complexity
  • Lowers inventory cost by eliminating need to stock both AC & DC products
  • Includes 125VDC battery (AC/DC versions) & 24VDC battery (DC version) 
DC Performance Increased Up to 500% To Match AC Ratings 
  • Transition from AC to DC without sacrificing performance
  • Eliminates the need for separate AC & DC output cards
  • Simplifies control schemes 
Integrated Surge Suppression
  • Prolongs the life of the coil by suppressing external voltage spikes
  • Lowers system cost by eliminating the need for additional surge protection 
Fit For Use In Rugged and Demanding Environments
  • Wide ambient temperature range for hot and cold environments
  • Enclosure Types 1 through 4X for indoor and outdoor applications o Optional Class 1, Division 2 coils available for hazardous locations 
No AC Hum
  • Ideal for applications requiring quiet operation