ID - inside diameter (as of a hose or tube) In-Line Flow Control Valves - Has one inlet and one outlet. Has complete shut-off and variable speed control. Since there is no excess flow port, this valve is used to meter the flow of oil only. ISO - International Standards Organization I L Load Check - Prevents a load from dropping while the control valve spool is being shifted from one direction over center to the opposite direction. Loaded U-Cup - Also called a Poly-Pak, a loaded u-cup has an O-ring installed in the u-cup to help it seal at cold temperatures and low pressures. Lock Valves - These valves are designed to lock a cylinder, or part of a circuit, without leakage while a control valve is in a neutral position. Essentially, these are pilot-operated check valves, allowing flow to an actuator and blocking reverse flow until pilot pressure is applied to “unlock” the circuit. Lock valves can be used for safety devices. They prevent movement of the load if the control valve is accidentally operated (while the pressure source is inactive) and if a line rupture occurs. They are designed for applications where leakage through the control valve could adversely affect the performance of the system such as clamps, outriggers, and work platforms. Both lines to the cylinder from the control valve must be connected to the lock valve, in this way pilot pressure from both the extend side and the retract side of the cylinder can be detected. If pressure drops on one side, the valve “locks” until the pressure is equalized on both sides. M Manifold - A fluid conductor which provides many ports. Commonly used with solenoid valves. Available in parallel circuit or series circuit Metering (Feathering) - Regulating the flow of oil through the valve by gradually moving the spool in one direction or the other. Monoblock Valves - One or more spools contained in a single housing Motor (Hydraulic) - A device for converting fluid energy into mechanical force and motion - usually rotary motion. Basic design types include gear, vane, and piston units. Motor Spool - Similar to the float spool but intended to allow a hydraulic motor to freewheel. Also prevents “dead stop” in a hydraulic motor by allowing gradual slow down when the valve is moved to neutral. N Needle Valve - A valve with an adjustable tapered point which regulates the rate of flow. Can be used as either a flow control or a shut-off valve. A small, tapered needle restricts the flow in both directions. When the needle is firmly seated, the flow is completely stopped. By adjusting the orifice on the needle valve, the operator can control the speed of the cylinder. Nitriding - (Nitro Rod) - A case hardening process that depends on the absorption of nitrogen into the steel. All machining, stress relieving, as well as hardening and tempering are normally carried out before nitriding. The parts are heated in a special container through which ammonia gas is allowed to pass. The ammonia splits into hydrogen and nitrogen and the nitrogen reacts with the steel penetrating the surface to form nitrides. Nitriding steels offer many advantages: a much higher surface hardness is obtainable when compared with case-hardening steels; they are extremely resistant to abrasion and have high fatigue strength. O
OD - Outside diameter (as of a hose or tube) ODP - Open Drip Pan (for motors) Operating Pressure - The maximum pressure at which a system is operated.
Prices subject to change. For the most accurate pricing, please refer to our website at Baileyhydraulics.com or call one of our Customer Experience Representatives at 1-800-800-1810. 193
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