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Eim Controls
THE G SERIESGAS ACTUATOR
Re-designed for another half century of service to the pipeline industry.
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EIM was the innovator in direct gas valve actuation. In fact, EIM was founded in 1949 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 50 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.
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.
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Gear Housing Details Robust Drive Train
The gear housing is made of cast ductile iron, preci-sion 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 improve-ment over the vane-style motor in the original G Series design.)
Positive Valve LimitsA unique feature of the G Series actuator is the meth-
od in which the limit travel stops are operated and ad-justed. 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 ad-justed through a large access port located on the side of the cam housing.
Easy RetrofitsThe G Series actuator typically drives through an ex-
isting 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 ResponseBecause 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.
Simple SizingActuator 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.
InterchangeabilityAnother advantage of the G Series gear driver design
is the ability to move the G unit from one valve to an-other 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.
Gas Control DetailsDesigned for Durability
The gas controls consist of a selector valve block for open or closed command. These blocks are made of highly corrosion-resistant 316-grade stainless steel. The selector’s internal com-ponents are stainless steel with static seal O-rings for positive sealing.
Local and Remote OptionsThe 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 DOT-approved stainless steel, lockable box. All of the control options are designed to be compatible and modular.
Limit ValvesLimit 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 me-chanical limit valves have more than 50 years of proven reliability under many adverse conditions. The valve po-sition can be coupled to a direct-mounted limit switch for remote valve position indication. These switches meet all required area classifications.
Supply gas can be locked in On or Off position.
Typical G Series pipeline installation mounted on a 600-class 30” ball valve.
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Inside an Industry Standard
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
Adjustable, End-of-Stroke Limit Valves
Cast Ductile Iron Gear Case
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5Available 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
Remote Control Options• Hard-wired• Telemetry• Radio
Typical Applications• Pig Launcher• Mainline Valve• Isolation Valve• Unit Valves
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G Series Advantages• Pneumatic-driven geared motor
(400–1440 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
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, versa-tility, 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.
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Inside an Industry Standard
Handwheel Extension
Wiper Seal
Bearing
Cam Stud Gear
Worm Gear
Pillow Block
Drive Gear
Cam Nut
Handwheel Shaft
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At the core of the G Series actua-tor is high-strength steel gearing. To ensure that the drive train is as smooth as it is solid, all power gearing is sup-ported on anti-friction bearings and is grease lubricated.
Among its other key internal com-ponents:
© 2008 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 05-08
EIM Controlshttp://www.eim-co.com
2000LP Low-pressure (60-125 psi) air/gas operation
Also available from EIM:
Suitable for pipeline and industrial situations requiring rapid response but lower torque output. (Control power supply range: 30 to 125 psi. Motor: 60 to 125 psi.)
2000HPUtilizes the pipeline’s pressure to generate the torque needed to reliably open and close large valves. (Control power supply range: 40 to 125 psi. Motor: 350 to 1,440 psi.)
Operates on gas pressures as high as 1,440 psi
Eastern Hemisphere Sales: EIM Controls UK, Ltd.6-7 Galaxy House • New Greenham Park Newbury, Berkshire RG196HW (England)+44 (0) 1635-817-315 • Fax: +44 (0) [email protected]
Head Office and Factory: EIM Controls, Inc.13840 Pike Road, Missouri City, TX 77489 USA(800) 679-1561 toll-free • (281) 499-1561 phone • (281) 499-8445 [email protected]
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.
Dimensions & Installation