Eim Controls THE G SERIES GAS ACTUATOR Re-designed for another half century of service to the pipeline industry.
EIM was the innovator in direct gas valve actuation. In fact, EIM was founded in 199 on the concept of the G Series gas actuator. The G Series was installed on nearly all major pipeline systems worldwide long before other current brands were even conceived. EIM has re-introduced the G Series actuator with refined engineering to answer the industry s desire to have an inexpensive, simple, reliable yet durable gas actuator. What s New About the G Series? EIM has retained all the proven strengths of the established G Series, and combined them with advanced safety and efficiency features that were unknown 0 years ago: A newer motor with fewer parts and just two gears. 60% less gas consumption than previous models. DOT-approved lockable housing for selector lever Most of these improvements can even be retrofitted to earlier G units proving that underneath, it s still the same rugged actuator that has earned the respect of the pipeline industry for more than half a century. 1 1 Recessed handwheel shaft for manual service. Automatic gas shutoff occurs when the unit is manually operated. Gear-type motor for years of trouble-free service. This design reduces gas consumption over the previous design by 60%. Manual selector valve lever with stainless steel padlockable box meeting DOT requirements. Cam-actuated, end-of-travel poppet valves provide improved shutoff and greater life expectancy over original design.
Gear Housing Details Robust Drive Train The gear housing is made of cast ductile iron, precision machined to support oversized ball bearings and large steel drive gears. The oversized bearings and gears are submerged in a grease-filled gear case to ensure long, maintenance-free service. A durable geared motor of proven design drives the gear train. (This is an improvement over the vane-style motor in the original G Series design.) Positive Valve Limits A unique feature of the G Series actuator is the method in which the limit travel stops are operated and adjusted. The open and closed limit valves are activated by a very reliable, continual-contact gear train. The travel limit cams are always in step with the valve stroke, even during handwheel operation. These cams are easily adjusted through a large access port located on the side of the cam housing. Easy Retrofits The G Series actuator typically drives through an existing or furnished worm gear or bevel gear. This makes retrofits to existing hand operated gate or ball valves very affordable and easy. No need to change valve stems or use of hydraulic oil. Rapid Response Because the G Series is a gear design, fast stroke times are possible on large or small diameter valves, allowing for effective ESD applications or basic applications such as pig launcher valves. Gas Control Details Designed for Durability The gas controls consist of a selector valve block for open or closed command. These blocks are made of highly corrosion-resistant 16-grade stainless steel. The selector s internal components are stainless steel with static seal O-rings for positive sealing. Supply gas can be locked in On or Off position. Local and Remote Options The actuator selector position can be activated by a local lever or by remote controlled electric or pneumatic solenoids. This allows for remote valve operation by a command center or by a triggering device such as a line break detection device. The local selector valve lever is located on the valve actuator and inside of a DOTapproved stainless steel, lockable box. All of the control options are designed to be compatible and modular. Limit Valves Limit valves are the mechanism used to stop the valve travel at the desired open and closed position. These limit valves are made of stainless steel and are activated when the cam nut makes contact during operation. The mechanical limit valves have more than 0 years of proven reliability under many adverse conditions. The valve position can be coupled to a direct-mounted limit switch for remote valve position indication. These switches meet all required area classifications. Simple Sizing Actuator sizing is accomplished by gear changes only. All G Series gear housings are the same size but have optional gear combinations to adapt to any valve torque or travel requirement. Interchangeability Another advantage of the G Series gear driver design is the ability to move the G unit from one valve to another as long as a bevel or worm gear exists. Due to the gear design, actuator orientation does not matter. The concept of the G Series is to simply replace a handwheel with a gas-driven operator. Typical G Series pipeline installation mounted on a 600-class 0 ball valve.
Inside an Industry Standard 1 6 On/Off Selector Valve Assembly Poppet Assembly Static O-Ring Seals DOT-Compliant Lockable Control Box Auto-Close and ESD-Compatible Piston Module Optional Limit Switches and Solenoids for Remote Operation Block and Bleed Power Gas Supply Valve Lockable in On or Off Position Manual Handwheel Option Standard 9 10 Adjustable, End-of-Stroke Limit Valves Cast Ductile Iron Gear Case Available Accessories Rate of Pressure Drop (ROD) System A standalone security feature that automatically closes valve in response to sudden changes in rates of pressure or flow; can also be set for time-delay response. ROD System Calibration/Test Kit Filter Lubricator Pilots Muffler/Mist Extractor 1 Remote Control Options Hard-wired Telemetry Radio Typical Applications Pig Launcher Mainline Valve Isolation Valve Unit Valves
6 9 G Series Advantages Pneumatic-driven geared motor (00 10 psi) Direct-power gas (no regulator required) Stainless steel controls throughout No hydraulic tanks or control panels required Gear-driven limit valves for reliable shutoff Gear-assisted handwheel drive shaft for easy and fast manual operation Grease filled main gear housing for maintenance free long life Adaptable to most existing bevel or worm gears Geared power train for predictable and rapid valve stroke Interchangeable limit cam gearing for any valve stroke time Ductile iron gear housing provides durability for any valve application Limit travel stops easily adjusted Reliable, rugged, compact & low maintenance 10 Simply stated, the G Series direct gas actuator is the first actuator to utilize direct natural gas pressure to operate a pipeline valve. Its compact, lightweight design ensures easy installation, versatility, and simple maintenance. And thanks to the G s unique gear train, there s no need to use reservoir bottles filled with hydraulic oil, and no need for complex control panels.
Inside an Industry Standard At the core of the G Series actuator is high-strength steel gearing. To ensure that the drive train is as smooth as it is solid, all power gearing is supported on anti-friction bearings and is grease lubricated. Among its other key internal components: 1 Handwheel Extension 1 Wiper Seal 6 Bearing 6 9 Cam Stud Gear Worm Gear Pillow Block Drive Gear Cam Nut Handwheel Shaft 9 6
Dimensions & Installation The G Series actuator mounts directly to the valve gear head by means of an economical adapter, and connects to the existing handwheel shaft. The G Series may be mounted in any position, is readily inspected and maintained. Small stem type valves may be operated with the G directly driving the stem. Also available from EIM: 000LP Low-pressure (60-1 psi) air/gas operation Suitable for pipeline and industrial situations requiring rapid response but lower torque output. (Control power supply range: 0 to 1 psi. Motor: 60 to 1 psi.) 000HP Operates on gas pressures as high as 1,0 psi Utilizes the pipeline s pressure to generate the torque needed to reliably open and close large valves. (Control power supply range: 0 to 1 psi. Motor: 0 to 1,0 psi.) Head Office and Factory: EIM Controls, Inc. 10 Pike Road, Missouri City, TX 9 USA (00) 69-161 toll-free (1) 99-161 phone (1) 99- fax sales.usa@eim-co.com EIM Controls http://www.eim-co.com Eastern Hemisphere Sales: EIM Controls UK, Ltd. 6- Galaxy House New Greenham Park Newbury, Berkshire RG196HW (England) + (0) 16-1-1 Fax: + (0) 16-1-60 sales.international@eim-co.com 00 EIM Company, Inc. All rights reserved. Technical information expressed herein is subject to revision. EIM Company, Inc., shall not be liable for technical or editorial errors or omissions made herein; nor for incidental or consequential damages resulting from the furnishing, performance, or use of this document. G-1000 0-0