Magnet-Based Level Switch replaces mercury-based models.
Press Release Summary:
Jerguson® Tri-Magnet Switches are available in kits that let plants upgrade existing mercury switches by replacing switch and enclosure without removing existing chamber. Switch mechanism is based on Jerguson 3D magnet design, in which snap action is accomplished by utilization of magnetic repulsion. Available switch mechanisms include 10 A mechanism for general-purpose duties up to 480°F, 5 A high-temperature (750°F) mechanism, as well as hermetically sealed switch mechanisms.
Original Press Release:
Jerguson Tri-Magnet Switches Offer Mercury-Free Replacement
Plants can now retrofit their Mercury-Based Level Switches with the unique, economical and environmentally friendly Jerguson® Tri-Magnet Switch from the Clark-Reliance® Instrumentation and Controls Group.
Replacement kits are available to upgrade a wide variety of existing mercury switches, enabling replacement of the switch and enclosure without removal of the existing chamber.
Customers will benefit from the many advantages Jerguson® Tri-Magnet Switches afford. "Our switches give users the ability to upgrade quickly and safely. Plus, customers can take confidence in Clark-Reliance's unmatched reliability, state-of-the-art technology, high-quality performance and local service," said Chris Fadden, Marketing and Inside Sales Manager.
In operation, the float or displacer drives a stainless steel sheathed permanent magnet attached to the float rod in the glandless pressure tube. As the float rises and falls with a changing liquid level, the float assembly moves upward inside the pressure tube. A switch mechanism mounted inside the enclosure adjacent to the pressure tube is activated by the rising or falling magnet.
The vertical movement of the float magnet in the pressure tube simultaneously actuates the secondary and switch magnets within the switch mechanism to operate the contacts. This three magnet system enables the float magnet to pass the switch and actuate switch mechanisms at other levels. Switch mechanisms that are actuated will not re-set until the float magnet actuates the switch mechanism on a falling level.
The switch mechanism is based on a unique Jerguson three-dimensional magnet design in which the snap action is accomplished by the utilization of magnetic repulsion. The magnet mounted on the float rod causes the secondary magnet to rotate as it passes up and down. The switch magnet is repelled by the secondary and snaps to the opposite side. This causes the cradle to pivot, moving the push rods that operate the switch contacts. The result is positive snap action interlock switching. No springs. No problems.
Four different switch mechanisms are available. A ten amp mechanism is designed for general-purpose duties up to 480 degrees Fahrenheit. For high temperature applications up to 750 degrees Fahrenheit and five amps, a high temperature mechanism is offered. Hermetically sealed switch mechanisms are suitable for low temperature duties, contaminated atmosphere environments and intrinsically safe circuits. All moving parts and contacts are enclosed in an inert gas filled stainless steel enclosure. Low current mechanisms are gold plated contact switch mechanisms for use in intrinsically safe or low power circuits up to 750 degrees Fahrenheit.
The switches are an ideal choice for petrochemical, power generation and OEM applications. Both single and double-pull-switch models are available.
Clark-Reliance® is a multi-divisional corporation consisting of three groups, Clark-Reliance® Instrumentation and Controls Group, Clark-Reliance® Filtration Equipment Group, and Clark-Reliance® Filtration Elements Group. These Groups offer Anderson®, HYCOA, Jacoby-Tarbox®, Jerguson®, Magne-Sonics®, National Filtration Systems® and Reliance® products. For more information or to get a free copy of the new brochure, call (440) 572-1500, visit www.Clark-Reliance.com, or write to: 16633 Foltz Parkway - Strongsville, Ohio 44149.
Contact:
Julie Osborne
(216) 621-6800 x 24
josborne@stevensbaron.com
