scotch yoke hydraulic pump for sale

In real life scenarios with critical service valves, there are situations such as the loss of air or loss of power where a valve must be forced into a position other than its current position. In those critical times, the right accessories on an actuator will allow an operator to move a valve from closed to open or open to closed, regardless of the position it was designed to “fail” to. Max Air’s HD line of scotch yoke actuators offers this capability. Shown here is our hydraulic manual override system. A self-contained hydraulic reservoir and hand pump are utilized to power an auxiliary hydraulic cylinder and drive the actuator to the required position. The Double Acting actuator will stroke the valve, manually, either clockwise or counter clockwise as required. The Spring Return unit compresses the spring and drives the actuator to the opposite of it’s fail position. i.e. Opens a valve with a fail closed actuator or closes a valve with a fail open configuration.

The MS Series Electro-Hydraulic actuator by PDC LLC is the ideal product for any general service on/off application, with fail safe options available, if desired. Consisting of a self-contained, bi-directional motor driven pump with an integral hydraulic cylinder and mechanical drive modules.

The MS Electro-Hydraulic’s modular design allows you to choose the best combination for your service conditions. Consisting of a mechanical drive, a control box with a choice of optional Feedback and optional Fail-Safe configuration if desired.

As a full-featured, self-contained actuator the general service MS Electro-Hydraulic actuator supplies various input and output capabilities which include:

All important components (motor, pump, hydraulic solenoid valve, hydraulic tank, etc.) are protected and included in a steel box (stainless steel on request).

Reliable- Welded carbon steel housing and high-strength scotch yoke mechanism ensure safe and reliable operation. Low friction heavy-duty nickel plated cylinders provide high performance and the long life of the pneumatic cylinder.

Versatile- Lightweight but rugged actuator with both symmetrical or canted scotch yoke for ideal torque distribution. Interchangeable power and spring modules allow for easy and quick reversal of the fail-safe mode without any danger. Cylinder design allows easy replacement of all pneumatic seals in the field.

This paper describes the design, construction, and performance analysis of an adjustable Scotch yoke mechanism mimicking the dorsoventral movement for dolphin-like robots. Since dolphins propel themselves by vertical oscillations following a sinusoidal path with alterable amplitudes, a two-motor-driven Scotch yoke mechanism is adopted as the main propulsor to generate sinusoidal oscillations, where leading screw mechanism and rack and pinion mechanism actuated by the minor motor are incorporated to independently change the length of the crank actuated by the major motor. Meanwhile, the output of the Scotch yoke, i.e., reciprocating motion, is converted into the up-and-down oscillation via rack and gear transmission. A motion control scheme based on the novel Scotch yoke is then formed and applied to achieve desired propulsion. Preliminary tests in a robotics context finally confirm the feasibility of the developed mechanism in mechanics and propulsion.