Oil Field Encoders operate in Zone 1 hazardous areas.
September 23, 2009 -
Used in hazardous areas without need for intrinsic safety barriers, EN series encoders include EN42, with SS hollow shaft and dual-split clamping collar for motor mounting, while EN44 model mounts directly to IEC motor flange and has isolated flex coupling. Operating in -50 to +100°C temperatures, units tolerate shock/vibration and resist corrosion. They include mechanically captured bearings, nonglass code discs, and field wireable terminal block inside conduit box with ¾ in. NPT entry.
(Archive News Story - Products mentioned in this Archive News Story may or may not be available from the manufacturer.)
Original Press release
Dynapar
1675 Delany Rd.
Gurnee, IL, 60031
USA
Field-Friendly Encoders Eliminate Barriers for Zone 1 Use
Gurnee, IL - September 22nd, 2009 - Dynapar announces the introduction of the EN series of oilfield encoder suitable for use in Zone 1 hazardous locations. What makes the new incremental encoders unique is their ability to operate in hazardous areas without the need for intrinsic safety (I.S.) barriers. Removal of the I.S. barrier reduces system cost, simplifies wiring, and provides for a more permanent installation. Also, faster data acquisition rates are possible since losses through the I.S. barrier are eliminated. The new encoders feature Ex ia mb e IIC T4 ATEX certification, along with an industry-leading -50 to +100C operating temperature range.
Field-Friendly Concept
The new harsh duty incremental encoders are designed with "Field-Friendly" characteristics in mind-compact, easy to mount, easy to wire, and reliable in harsh conditions. These traits are routinely designed into NorthStar brand heavy-duty encoders, but become much more challenging when Zone 1 certification is required. The new encoders incorporate an increased safety interface to eliminate the need for external I.S. barriers, and use encapsulated electronics to prevent unwanted component contact with flammable gases. As a result, the encoder circuit isn't limited in electrical energy the way standard I.S. encoders are, therefore allowing for longer cable runs and improved signal-to-noise ratio. The EN series also features a field wire-able terminal block inside a conduit box with common ¾" NPT entry. Optional ATEX-rated glands for armored or non-armored cable use are also available.
Rugged Design for Oilfield Motor Use
Starting with Dynapar's proven phased-array ASIC sensing technology, the encoders feature a rugged design with wide sensing gap, mechanically captured bearings, and non-glass code discs. The result is a robust incremental encoder that can handle excessive shock and vibration that would destroy more fragile industrial encoders. In addition, the housing receives hard anodizing to resist corrosion in less-than-perfect operating conditions. The EN42 variant is configured with a stainless steel hollow shaft and dual-split clamping collar for motor mounting. The standard anti-rotation arm is a heavy duty 5/16" threaded tether rod with swivel ball ends for reliable installation. The EN44 model mounts directly to an IEC motor flange and incorporates an innovative isolated flex coupling. This special coupling not only isolates the encoder electrically, it compensates for motor shaft run-out and end-play.
Availability
The EN42 and EN44 incremental encoders are built to order and available for the general market. The encoders will be marketed under Dynapar's heavy-duty NorthStar brand name and will be manufactured in the company's Gurnee, IL manufacturing facility. For custom OEM applications and volume pricing, contact a Dynapar representative at 800-873-8731 or visit the web at dynapar.com/drillgear for technical information.
About Dynapar
Dynapar is a world-leading manufacturer of optical and magnetic encoders and resolvers with more than 50 years of experience in engineering and manufacturing rotary feedback devices. Dynapar was founded in Gurnee, Illinois in 1955 and has been expanded through the acquisitions to include Dynapar(TM) Hengstler(TM), NorthStar(TM), Harowe(TM), and Encoder Technology brand product lines. Dynapar is now uniquely a provider of technologies spanning optical, magnetic, and resolver based feedback.
Pioneering the first true vector-duty hollow-shaft encoder launched Dynapar's strong presence in several industries, including steel, paper, elevator, oil and gas, wind energy, medical, material handling, and industrial servo manufacturing. From small kit encoders to large mill-duty tachometers, Dynapar has the industry covered.
Dynapar customers rely on expertise and support provided from the U.S. sales and manufacturing location in Gurnee, Illinois: Phone +1 800.873.8731 or +1 847.662.2666; FAX +1 847.662.6633; Website: www.dynapar.com. In addition, Dynapar supports global customers with local sales and production locations in Germany, Japan, China, and Brazil.
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