VH Series 4-Way Manual Rotary Hand Valve

Brand: SOLH by Richge Technology

Product Positioning

     VH series is a 4-way manual rotary hand valve operated by 90° handle rotation to switch air circuits. It is widely used for manual direction change, equipment commissioning, emergency stop and air source switching in pneumatic systems, featuring simple mechanical structure, stable reliability and clear visual position indication.

Core Structure & Working Principle

     -- Valve Type: 4-way manual rotary spool valve

     -- Operation Mode: 90° handle rotation for position switching

     -- Port Definition: P supply inlet, A/B working output ports, R exhaust port

     -- Three standard center functions:

        1. Center Closed (Model 200/210): All ports sealed at center position to maintain cylinder pressure

        2. Center Exhaust (Model 201/211): Port A & B connected to exhaust for full pressure release

        3. 2-Position (Model 202/212): No center position, only two states P→A / P→B

     -- Sealing Structure: Precision rotary spool seal with ultra-low internal leakage

     -- Mounting Options: Side piping / bottom piping; panel mounting / direct valve body mounting. 

Full Technical Specifications

  1. Universal General Parameters

     -- Applicable Fluid: Compressed air

     -- Proof Pressure: 1.5 MPa

     -- Max Operating Pressure: VH200/300/400: 1.0 MPa VH600: 0.7 MPa

     -- Ambient & Medium Temperature: -5 ~ +60℃ (no icing allowed)

     -- Operation Rotation Angle: 90°

     -- Lubrication Requirement: Lubrication-free; ISO VG32 turbine oil lubrication optional

     -- Material: Valve body – zinc alloy / die-cast aluminum; handle – engineering resin

  2. Series Size & Port Parameter Table

Model Code Explanation

  1. Example: VH210-02

     -- VH: Base series code

     -- 2: Size code (2=1/4", 3=3/8", 4=1/2", 6=1")

     -- 1: Piping layout (0 = side port, 1 = bottom port)

     -- 0: Center function (0=center closed, 1=center exhaust, 2=2-position)

     -- 02: Port size code (02=1/4", 03=3/8", 04=1/2", 06=3/4", 10=1")

  2. Popular Standard Models

     -- VH210-02: 1/4", bottom piping, 3-position center closed (most widely used)

     -- VH200-02: 1/4", side piping, 3-position center closed

     -- VH201-02: 1/4", side piping, 3-position center exhaust

    -- VH310-03: 3/8", bottom piping, 3-position center closed

 Core Product Advantages

  1. Intuitive Operation with Built-In Position Lock

      90° rotary handle with clearly visible switch position; integrated mechanical positioning lock prevents accidental misoperation.

  2. Three Center Function Options for Diverse Working Conditions

     -- Center Closed (200/210): Maintain cylinder clamping pressure during equipment shutdown

     -- Center Exhaust (201/211): Safe pressure relief and full system venting for maintenance

     -- 2-Position (202/212): Simple bidirectional switching without intermediate hold position

  3. Highly Flexible Multi-Mount Design

     Supports both side piping and bottom piping layouts; two installation methods available: panel flush mounting or direct valve body fixing.

  4. Robust Long Service Life & Maintenance-Free

      Durable rotary sealing structure with outstanding dust and contamination resistance; no routine lubrication or maintenance required.

Typical Application Scenarios

     -- Manual bidirectional switching for pneumatic cylinders

     -- Temporary manual control, pressure venting during equipment commissioning & maintenance

     -- Emergency stop isolation and air source cut-off for machine safety interlock

     -- Manual trigger stations for semi-automatic production equipment

     -- Pneumatic circuit demonstration and basic control teaching test benches

One Sentence Summary

     SOLH VH 4-way manual rotary hand valve features 90° rotary operation, three interchangeable center functions, side/bottom piping options and dual panel/valve mounting methods, serving as a standard universal component for manual pneumatic switching, on-site commissioning and safety air circuit isolation.