The pilot-operated check valve is shown in Fig. 7.11. For flow in the forward direction, this valve operates just like a normal check valve. Pilot…
Presses are used for molding, shaping, shearing, and many other operations. Some of the older manufacturing plants have lines of presses connected in parallel as…
The gear-type flow divider functions like two gear motors with their shafts rigidly attached. We will consider first the case in which both motors have…
Theoretically, the orifice on both sides of the flow divider can be adjusted so that the ?P across the orifice plus the load ?P is…
Some explanation of the electrical circuit required for a servo valve is presented here to help readers understand how the servo valve in the servo…
Flow control valves are used in constant-flow (fixed displacement pump) circuits to control actuator speed. The simplest type of flow control valve is a needle…
Servo valves are a close relative of the proportional valve and are based on an electrical torque motor which produces a small deflection proportional to…
Load sensing is achieved with a special compensator mounted on a variable displacement pressure-compensated pump. The reader should envision this special compensator mounted on the…
The closed-center circuit shown in Fig. 4.18 has a variable displacement pump like that shown in Fig. 4.15. The compensator valve spring is a 2500…
The fixed displacement pump shown in Fig. 4.3 delivers 20 GPM continuously. The relief valve is set on 2500 psi. When the DCV is manually…