Gas-over-oil Actuator It is s a kind of self operated actuation mechanism, with the pressure generated by the medium of the pipes themselves, the valve could be droved to operate, opening or closing. The pneumatic hydraulic actuators have the advantages of simple operation principle, safe and reliable controllability, strong environmental adaptability which are adapted to all-weather conditions outdoor.
This product uses pipeline natural gas as its driving gas source. According to its high pressure design, the pneumatic hydraulic system enters the air storage tank and high pressure pneumatic control valve group directly without depression. Under the effect of control signal, high pressure controlled gas enters relative gas/liquid circuits, taking advantage of the principle of equal pressure transmission of liquid media, the gas and liquid synchronizes and operates the hydraulic oil gas tank of the valve driving device, thus controls the valve.
1. Gas supply : (0.4-16Mpa )
2. Medium: Air, nitrogen or non acid gases (purifed natural gas)
3. Output torque: 50-600,000Nm
4. Manual hydraulic manual pump (hydraulic manual installation with independent testing function is available)
5. Environment: Standard range: -40 to 100°C (-20 to 210T)
Optional range: -55 to 150°C (-65 to 300F)
6. Actuation structure IP grade IP68 All-weather outdoor; Communication ports: USB/RS232/485
7. Explosive-proof grade: Exd IIC T4/T6
8. Stainless steel gas control box: Protection grade IP65
9. Electric accessories: Solenoid valve, limit switch, position transmitter, junction box
10. Applicable valve type: 90rotary motion, Long distance natural gas pipeline ball valve emergency cut-of, ESD cut-off
·Patented design of parallel, double-orientating fork-type transmission box could provide relatively higher open torque for stroke of valve.
·The parallel, double-orientating rods could sustain horizontal load and support the piston connection rod.
·Composite structure bearings provide reliable, smooth and steady operation, thus extend the service life of the actuator.
·The piston bearing reduces the friction between the piston and the cylinder wall, and makes the cylinder becoming self-lubricating.
·The clad layer on the guiding rod is high strength and anti-corrosion, and reduce the friction to them minimum level.
·The cylinder wall is in highly anti-corrosion and reliable.
·Internal guiding connection rod design makes the structure of cylinder more compact.
·Whole sealing, all weather protective carbon steel shell is solid and reliable, the internal coating is anti-corrosion.
·The external limit bolt can be precisely adjusted in the full range of 90±5°.
·Low hysteresis and rapid response enhances usage under regulative operation condition.
·Provides asymmetric and symmetric fork-type, fitting for valves with different feature.
·A special coating makes the devices could be used on offshore platform and in highly corrosive environment.
·Provides Special actuation for usage under acid gas.
Optional function control module :
·Electronic monitoring tube rupture control system PLPG2010
·High and low pressure monitoring and high/low voltage cut-off control
·ESD emergency cut-off, onsite reset
·Partial distance testing, online active ball valve
·False operation prevention designed handle and high voltage, integration module
·Control system overall insulation, prevent cathodic protection current from running off
·Valve position transponder provides the electricity location and location indication of the valve
·Safety decompression valve and filter decompression valve
·Integrated insulated filtering tubing joint, online cleaning with pressure
Electro hydraulic actuators generally consists of four parts: actuation mechanism, control system, hydraulic station, control and operation cabinet (control box)
The pressure of the hydraulic system Low pressure could reach 10.5MPa Medium pressure could reach 21.0MPa High pressure could reach 35.2MPa
Local and remote control, tube rupture emergency cut-off actuator
Used with electric tube rupture detection system. This system is used in long distance transportation pipeline of oil and gas, where there’s power supply but isn’t reliable. Combined use of hydraulic system and pipeline rupture detection
system, when the pressure drop rate reach the preset value, the tube rupture system send a signal to let the actuation
mechanism closing the valve. Combined usage of electric powered hydraulic pump and energy accumulator could
lower the requirements for power source of the hydraulic actuation mechanism.
Local and remote control, electrification accidents and safety
Under normal operating situation, the actuator supplies power normally, when the system loses power, close or openthe valve according to craftsmanship requirements
Local and remote control, ratio adjustment
With regard to situations require for higher flow adjustment precision, adjust the valve with hydraulic ratio system.
Local and remote control, servo adjustment
With regard to situations require that the flow adjustment must be line-type, and the opening must be controlledstrictly, hydraulic servo system could be used to adjust the valve.
Solar energy power supply hydraulic system
Particularly used in situations where there’s no power and gas supply, such as long distance transportation pipelines.
Slow-closure dual speed control
Used to control water and oil transportation pipelines, preventing from water hammer phenomenon
Rapid switch control
●With regard to different kinds of valves, instant opening and closing operation could be done within 0.5 second
●The actuation mechanism for completing rapid switch function could be either single operation spring type or dual operation type
●The design of the control valve is high pressure preservative and zero leakage
●The electro-magnetic valve is integrated in the oil circuit module with other hydraulic control components, preventing from leakage.
●Hydraulic pipe: generic stainless steel material
●Either carbon steel or stainless steel could be chosen to be the material of the control cabinet
●The patented design of parallel, double-orientating fork-type transmission box provides relatively higher open torque for the valve stroke. The output torque could reach 600,000Nm
●Hydraulic media Hydraulic oil or other flame retardant hydraulic liquid
●Environment temperature -40 +100 Special temperature according to clients' requirements
●Local control such as manual operation, local manual pump operation, local control box operation
●Local control or remote control operation
●Local and remote control, emergency cut-off
●Rapid opening and closing
●Local and remote control, electricity supply accident safety
●Local and remote control, proportional control
●Local and remote control, servo adjustment
●Solar power supply method
●Slow-closure type dual speed control
◆ ISO99001 quality system certification, all executive agencies produce in strict accordance with ISO9001 quality system
◆ The actuator is 100% inspected when it leaves the factory, and a test report is attached to each set of electro-hydraulic actuators
DG series double guide fork type actuator includes 4 types 6 grades and 24 specifications about more than - - . ( 200 varieties The output torque is 20Nm 600000Nm the pressure of air source is 0 4Mpa 16Mpa and the ). ~ , . ~ , supporting valve includes the application requirements of 1" 56 Class900 pipeline ball valve
Remark: The output torque reaches to 600,000 Nm and the starting torque 56 1500LB of the valve in whole "differential pressure is about 375,450Nm;
The pneumatic actuator of Mikenson was designed by Chengdu Mikenson in 2019 and assembled in August 2020
◆ The external hydraulic source at the customer site is the highest. The hydraulic actuator is equipped with its own control panel and control accessories 35MPa
◆ Patented series parallel, double-guided fork transmission box can provide high opening torque DG for quarter-travel valves
◆ Combined structure bearing can provide reliable and smooth operation and prolong the service life of the actuator
◆ The high pressure power of the hydraulic system makes the hydraulic actuator have a smaller weight than other actuators such as pneumatic and electric
◆ The oil tank, hydraulic pump, accumulator, etc. are organically combined according to user requirements to form a stable and reliable hydraulic power source, which can meet both general needs and places with low power reliability.
◆ The combination of pressure, flow and directional control valves and abundant electrical control components constitute various hydraulic control systems, which can meet the different functions and requirements of users for protection and explosion protection. The incompressibility of the hydraulic medium and the realization of zero leakage and high pressure retention in the system make Hydraulic actuators have extremely high positioning characteristics
◆ It can realize emergency self-protection functions such as opening and closing of valve power failure
◆ It can realize the function of quick closing and quick opening of the valve
◆ In high temperature and flammable occasions, flame retardant hydraulic fluid can be used as the medium (such as water-glycol emulsion, etc.)
◆ Provide asymmetric and symmetrical forks for valves with different characteristics
◆ The external travel limit bolt is precisely adjustable within the range of 90±5°
1. The pressure of the hydraulic source can reach 35MPa, and the actuator has its own control panel 2. The hydraulic actuator is equipped with its own control panel and control accessories