A __ center position directional control valve allows a hydraulic system to operate with more than one actuator and with each actuator operating independently of the others.

A __ is an internal component of a directional control valve that is used to control fluid flow and to connect internal passages and ports.

There are __ different subplate designs

A __ center position directional control valve is used to hold the piston in a cylinder in the desired position while allowing fluid flow to be directed back to the reservoir without the need to activate a relief valve.

__ mounting is a method that uses tubing or threaded pipes that connect directly to a directional control valve.

A directional control valve __ is a mechanism that is used to move the position of the spool in a directional control valve.

Solenoids alone are not strong enough to move a directional control valve spool when the fluid flow is greater than __ gpm.

In a directional control valve schematic symbol __ the position boxes depict the direction of fluid flow for each spool position.

A hydraulic system that does not have a variable displacement, pressure compensated pump typically uses a(n)_____ centered or _____- center position directional control valve so that the hydraulic fluid can be returned to the reservoir

__ pressure is the amount of pressure required to slightly unseat a ball or poppet and start to allow fluid flow through a check valve.

A(n) __ is a schematic representation of the direction in which a spool forces fluid to flow.

__ pressure is initiated when the fluid pressure in a fluid power system shifts the spool into the desired position.

A __ check valve allows fluid flow in one direction and restricts fluid flow in the opposite direction until it receives a pressure signal through a pilot line applied to the port against the piston.

The advantage of a three position, four way directional control valve is that it has different center positions that can preform different operations.

Two-position, two-way directional control valves can turn on and off separate components of systems that are powered by the same hydraulic power unit.

Most directional control valves used in industrial applications have two, three, or four positions, but some can have five or six positions.

Every manufacturer has a different coding system used for ordering their directional control valves.

Three-position, four-way directional control valves can only control one direction of fluid flow at a time.

Internal arrows on a hydraulic schematic diagram can be either colored solid or outlined.

On a three-position directional control valve, both sides of the spool have springs to center the spool for normal condition.

An AND logic valve allows fluid flow out of the valve when pressure is present on input 1 and input 2.

A shuttle valve is also known as an AND logic valve.

Right angle check valves are installed mainly in hydraulic systems, rather than pneumatic systems.

A shuttle valve operates differently than an OR logic valve.

Pilot-pressure actuators are used when electronic control of a hydraulic system is desired.

On schematic diagrams, pilot lines are indicated by dotted lines.

Open-center position directional control valves are typically used in applications where there is only one cylinder in the hydraulic system.

Pilot pressure does not require electrical, mechanical, or manual actuation.

A position is the number of piping ports in a directional control valve.

Solenoid-actuated directional control valves are always double-solenoid actuated.

A shuttle valve is a type of logic valve.

Newly installed directional control valves typically have a schematic symbol printed or embossed on the valve body.

The pressure point at which an automatic detent releases can be fixed or variable.

Directional control valve actuators can be automated or manual but never a combination of both.

The spring pressure of the biasing spring in a direct-acting check valve is adjustable.

When a directional control valve is in the closed-center or tandem-center position, the piston in a hydraulic cylinder can move.

Two-position, two-way directional control valves are always normally closed (NC).

Two- and three-way directional control valves only control one direction of fluid flow at a time.

Manifold subplates reduce the amount of space and piping that a hydraulic system requires.