LDG

LDG

The Limitorque LDG Direct Gas powered scotch yoke actuator series is specifically designed to be operated by high pressure natural gas, or any other high pressure pneumatic fluid up to a maximum of 105 barg (1500 psig). LDG actuators are ideal for pipeline applications where no external sources of motive power are present and provide a robust heavy duty design and long service life with industry leading maintenance intervals. This makes them the actuator of choice for installation in remote or unmanned facilities.

Brand: Limitorque
Category: Scotch Yoke
Type Scotch Yoke
Action Rotary
Fluid Power Gas Powered
Sizes 15, 20, 25, 30, 35, 40, 50
Maximum Output 300,000 Nm (221,268 ft-lbs)
Pressure Rating 1500 psig
Fail Safe Operation Last, Closed, Open
Enclosure Fabricated Carbon Steel, Carbon Steel ENP Lined, Stainless Steel
Seals NBR Buna, Viton®, and Fluorosilicone
Temperature Range -60°C to 160°C (-76°F to 320°F) Seal Dependent
Manual Override Hydraulic Manual Hand Pump
Options Control Panel, Limit Switch Box, Line-Break, Low/High Pressure Trips

The LDG actuator is suitable for use in Safety Integrated Systems in accordance with IEC 61508 up to and including SIL Level 3

On-board Medium-High Pressure Control group MHPC provides multiple control functionalities at full rated pressure, thus eliminating need for pressure reducer, reducing system complexity, and limiting gas consumption and exhaust

Efficient design based on computational modelling and extensive experimental validation provides high performance with reduced size, weight, and consumption

Symmetrical and canted scotch yoke types perfectly fit individual valve torque requirements

Rugged heavy-duty fabricated carbon steel build epoxy painted and Electroless Nickel Plated (ENP) cylinders provide maximum protection against corrosion

Dust/water proofing to IP66/IP66M and IP67/IP67M according to EN 60529

25-year design life and maintenance intervals up to six years, (depending on service conditions, proper installation, operation and maintenance) exceed industry expectations

Modular construction allows easy on-site maintenance without special tools and without removal from the valve

Spring return and double acting configurations available (fail open, fail close and fail-in-place capability)

High and Low temperature versions available: +160°C to -60°C (320°F to -76°F)

Wide range of feature and function customizations, including high-speed and high-cycle versions, are available