MOOG 77X Series flow control servo valves
MOOG 77X Series flow control servo valves
PRODUCT OVERVIEW
The 77X Series flow control servo valves are throttle valves for 3 and preferably 4-way applications. They are a high performance, 2-stage design that covers the range of rated flows from 4 to 57 l/min (1 to 15 gpm) at 210 bar (3000 psi) valve pressure drop per spool land.The output stage of the valve is a closed center, four-way sliding spool. The pilot stage is a symmetrical double-nozzle and flapper, driven by a double air gap, dry torque motor. Mechanical feedback of spool position is provided by a cantilevered spring. The valve design is simple and rugged for dependable, long life operation.
Features
2-stage design with dry torque motor
Low friction, double nozzle pilot stage
High spool control force
High dynamics
Rugged, long-life design
High resolution, low hysteresis
Set up at the factory
Intrinsically safe or explosive proof valve versions are environments
Field adjustable null bias
Loss of electrical signal results in a zero position failsafe
Benefits
Compatibility with many different fluids
Symmetrical build provides maximum stability over a variety of conditions
Stable consistent flows can be achieved, thus increasing accuracies
Increased production cycles
Reduced maintenance and down time
Improved accuracies for close tolerance applications
Allows easy installation and setup
Able to be employed in most hazardous environments
Adjustable for perfect alignment when interchanging equipment
Predictable, safe operation
Instructions and warnings related to the operation of the product:
The following specifications must be strictly observed:
The technical specifications and typical applications of the product system must be strictly observed.
PERSONNEL TRAINING: Only trained personnel may install, operate, maintain or repair the product system. These personnel must be instructed on the
These personnel must be instructed and briefed on the conditions in the hazardous area.
Unauthorised modifications: No modifications or structural changes may be made to the product system.
Maintenance Responsibility: It must be ensured that the product system is only used under appropriate conditions and in a condition that is fully fit for purpose.
Working environment: The user must fulfil the specified environmental conditions:
Safety regulations
The following safety regulations must be fully observed when (maintenance) work is carried out on the product system:
1 Disconnect completely.
2 Secure to prevent reconnection.
3 Confirm that the installation has been completed.
4 Perform grounding and short-circuiting.
- User name Member Level Quantity Specification Purchase Date
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