WMM SERIES 70 MANUALLY OPERATED DIRECTIONL VALVES

A directional valve is a type of hydraulic or pneumatic control component that directs or controls the flow of fluid (oil, air, or other media) by switching flow paths. It determines the path of fluid flow in a hydraulic or pneumatic circuit, controlling the direction of motion of actuators like cylinders and motors.

Hydraulic Valve Spool Configurations:
1. Basic Types:
  - Transition Spool
  - Slide Valve Spool
2. Symbol Categories (A through W):
  - Type A: Basic 4/2 configuration
  - Type B: Modified 4/2 configuration
  - Type C: Closed center position
  - Type D: All ports blocked in center
  - Type E through M: Various 4/3 configurations with different center positions
  - Type P through W: Alternative 4/3 configurations with specialized flow paths
  - Type *A and *B: Special configurations with zero position
3. Key Features:
  - Each configuration shows port connections (A, B, P, T)
  - Flow paths are clearly indicated by directional arrows
  - Center positions are specified for three-position valves
  - Transition and slide valve versions are provided for each type
4. Application Notes:
  - Symbols represent standardized hydraulic directional control valve configurations
  - Each type serves specific hydraulic circuit requirements
  - Configurations vary in:
    - Center position behavior
    - Flow paths
    - Port connections
    - Transition characteristics

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