However, what makes our O-Seal valves truly unique is that they come with interchangeable parts. The soft goods in the cartridge can be removed and made with different types of materials for certain applications.
The versatility of our O-Seal products presents a cost-effective solution for the US Navy and many other companies across the globe. With interchangeable parts, our O-Seal valves can be used for a number of applications, which means companies no longer purchase additional valves to run their systems. Please enter your username or email address.
You will receive a link to create a new password via email. You must be logged in to edit your profile. If the valve is returned to neutral , the oil is trapped in the cylinder, holding it in a fixed position , while pump flow is returned to the reservoir.
Shifting the valve in the opposite direction permits the oil to pass through the valve back to the reservoir. The relief valve limits the system pressure to a pre-set amount.
Relief valves are commonly incorporated into the directional control valve. A hydraulic system using a double acting cylinder and a 4-way valve differs from the single acting cylinder system in that the cylinder can exert force in both directions. With the control valve in, neutral flow is returned to the reservoir. When shifted in one direction , oil is directed to the piston side of the cylinder, causing the cylinder to extend. Oil from the rod side passes through the valve back to the reservoir.
If the valve is shifted to neutral , oil in the cylinder is trapped, holding it in a fixed position. A hydraulic system consists of the hydraulic fluid plus three major mechanical components.
Fluid is the medium via which a hydraulic system transmits its energy and, theoretically, practically any fluid could be utilized. However, given the operating pressure to psi that most aircraft hydraulic systems generate in combination with the environmental conditions and strict safety criteria under which the system must operate, the hydraulic fluid that is used should have the following properties:.
Several types of hydraulic pumps driven by a variety of power sources can be found in aviation applications. Pumps include:. SOME of the general principles of the mechanics of fluids—such for example as the laws of liquid equilibrium—have been known since very early times.
Because of this the ancient Egyptians were able to produce advanced systems of irrigation and the Romans, much later, their urban water supplies. It is somewhat surprising to find that, as early as the seventeenth century, working hydraulic systems were in existence where, cither by a system of balanced buckets or other devices, the prototype of the modern selector valve enabled a continuous supply of water to be maintained.
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