Zero Emissions Valve Actuation for Natural Gas …

1 Shafer ECAT Emissions Controlled Actuator TechnologyA unique, eco-friendly, Valve operating system for Natural gas pipelinesZero Emissions Valve Actuation for Natural Gas PipelinesThe oil & gas industry has come under intense pressure to reduce methane emissionsGas transmission companies now have a proven Valve operating system featuring the Shafer rotary vane gas-over-oil actuator to help tackle the challenge of reducing methane Emissions . This gas-over-oil actuator was specifically designed for pipeline applications where rugged, dependable equipment is vital. For 70 years, Shafer actuators with their control components have been used in over 100,000 field proven pipeline applications. The new Shafer Emissions Controlled Actuation Technology (ECAT) encompasses the functional characteristics of the rotary vane in a novel design eliminating Emissions typically associated with gas-over-oil systems.

2 What if your Actuation system had the capability to use high pressure pipeline gas to power the actuator and then re-inject the power gas back into the pipeline to eliminate Emissions ?Shafer ECAT is a field proven and highly reliable Gas-Under-Oil Valve operating system with no associated gas emissionsEmerson s Actuation Technologies developed an alternative to gas-over-oil powered actuators for environmentally sensitive conventional gas-over-oil technology, gas from the pipeline is used as the power source for the actuator, the new Shafer ECAT will not exhaust gas into the atmosphere at the end of the actuator s ECAT encompasses the time tested performance of the Shafer gas-over-oil actuator in a closed loop system with the benefit of no associated Emissions .

3 Emerson provides our customers the most innovative Actuation technologies with unprecedented performance needed for needed to today s industrial demanding environments. The Shafer ECAT Valve operating system is unlike any other gas-over-oil or direct gas actuator on the market. Actuation Control Valves Isolation Valves Regulators & Relief Valves Valve Instrumentation & Accessories Actuator and Control ComponentsPump and Motor with ReservoirRotary Vane ActuatorECAT Gas Re-injection System Unique Gas-Under-Oil Re-injection AccumulatorThe innovative accumulator design enables pipeline gas to pressurize hydraulic fluid which powers the actuator. The orientation of the accumulator, known as gas-under-oil, facilitates the gas re-injection process and allowing liquids to naturally gravitate back into the pipeline.

4 Versatile Re-Injection Power PackThe power pack supports utility electrical power or solar power for remote applications. Fail-Safe Reserve PowerIn the event of an electrical power failure, the accumulator will maintain reserve hydraulic power for a specified number of Valve Hydraulic Hand PumpFor commissioning or emergency operation, a hydraulic hand pump may be used to directly stroke the actuator or to re-charge the accumulator. Shafer ECAT is a Valve operating system for critical pipeline applications where dependability of the equipment is essential. The system applies progressive technology to prevent Emissions but also uses our proven technology and controls that we have relied on for years, to stroke valves under the most demanding conditions.

5 It is an excellent solution for environmentally sensitive applications. Mike McQuade, Senior Product Manager Emerson Automation Solutions, Actuation TechnologiesEasy System Readiness MonitoringGas control room can easily verify that the actuator is in the ready to stroke state with simple limit switch feedback. Sequence 1: The actuator is fully charged in the ready-to-close positionIn the first sequence, the actuator is in the open position awaiting a demand to close signal. The Valve may be operated locally, remotely or automatically by a variety of sensory and control devices. Until a demand signal is received, the piston accumulator remains in the fully charged state at the same pressure as the the second sequence, the actuator has received a demand to close signal and the actuator control system opens the flow paths to the rotary vane.

6 The pressurized gas in the accumulator forces hydraulic fluid into the actuators closing port and powers the actuator in the clockwise direction. At the same time, non-pressurized fluid from the actuator s opening port returns to the reservoir. Finally, the actuator has reached the fully closed of OperationThe Shafer rotary vane actuator and field proven control components are used to provide torque output and the required Valve control function. Refer to the Shafer RV-Series brochure ( REV C 04-12) for additional 2: The actuator is midway through the closing stroke and then fully closedActuator Fully OpenReservoirGas-Under-Oil AccumulatorPipeline GasPipeline GasPipeline GasPistonElectric MotorPumpControlControlControlActuator Mid StrokeActuator Fully Closed ReservoirReservoirGas-Under-Oil AccumulatorGas-Under-Oil AccumulatorPistonPistonElectric MotorElectric MotorPumpPump3 The Shafer ECAT system utilizes a compact electro-hydraulic motor and pump as the energy source to re-inject power gas back into the pipeline.

7 Following Valve operation, the motor/pump will automatically start, forcing hydraulic fluid back into the accumulator. As the accumulator fills with fluid, the power gas is re-injected back into the pipeline. The motor only runs for a short time during the gas re-injection process. Once the gas re-injection process is complete, the motor automatically stops and the system remains in a fully charged ready to stroke state awaiting a command to open the Valve . When an open command is received, the control directs the flow paths to rotate the actuator in the counter-clockwise direction and the gas re-injection process 3: With closing stroke completed, the actuator begins the gas re-injection process274243414031 GAS PIPELINE3923382221302934M182425263228203 33519364445 POWER OILRETURN OIL2 CLOSE1114151412109876516 PPCCCLOSEOPEN1331737 PNEUMATICMANIFOLD4647 Actuator and Control ComponentsGas PipelineECAT Gas Re-injection System Pipeline GasPipeline GasControlControlActuator Fully Closed Actuator Fully Closed ReservoirReservoirGas-Under-Oil AccumulatorGas-Under-Oil AccumulatorPistonPistonElectric MotorElectric MotorPumpPumpThe shaded area of the schematic illustrates the standard Shafer rotary vane actuator and control system.

8 The ECAT portion of the overall system has been adjoined on the right. The ECAT function is to provide gas re-injection with zero Emissions . Features and ApplicationsWhen you specify Shafer, you receive a complete system, factory tested, field proven with the longest warranty in the industry. The Shafer ECAT is backed by a ten year Shafer ECAT can be operated locally, remotely or automatically by a variety of sensory and control devices. We have developed over 4,000 individual control systems to meet the many requirements of our customers. Typical applications for the ECAT include: Emergency shut down Mainline isolation Linebreak protection Remote Valve control Station fire-gate and blowdown High/low pressure shutoff Prevention of mercaptan odorThe Shafer ECAT produces constant torque output over the full 90 Valve rotation.

9 Constant torque output is an exceptional performance advantage if abnormal, high flow conditions are present such as Shafer ECAT system can be configured as a versatile solution for both new actuators and retrofitting on existing equipment. The gas re-injection system can be powered by electrical power, UPS systems or solar power allowing for installation in remote areas where utility power may be unavailable or Shafer ECAT Valve operating system is weather proof and explosion proof (Class I, Div I) with a standard temperature rating down to -20 F or an optional rating down to -50 Shafer ECAT provides a sound solution for densely populated areas where the odor of Natural gas is problematic for local residents. It is compatible with existing Shafer hardware and can be purchased as an upgrade for most existing Emerson logo is a trademark and service mark of Emerson Electric Co.

10 2018 Emerson Electric Co. Shafer is a registered trademark of one of the Emerson family of companies. All other marks are the property of their respective owners. 2018 Emerson. All rights reserved. REV A A Safe, Intelligent Control Technology For Natural Gas Pipeline Applications The new Emissions Controlled Actuation Technology encompasses all the functional characteristics of the rotary vane in a novel design that eliminates the Emissions that have been associated with gas-over-oil systems. NORTH & SOUTH AMERICA19200 Northwest FreewayHouston TX 77065 USAT +1 281 477 4100Av. Hollingsworth 325 Iporanga Sorocaba SP 18087-105 BrazilT +55 15 3413 8888 ASIA PACIFICNo. 9 Gul Road#01-02 Singapore 629361T +65 6777 8211No. 1 Lai Yuan RoadWuqing Development AreaTianjin 301700P.