VM4 (VM400) Series Medium 3-Port Poppet Mechanical Valve

Brand: SOLH by Richge Technology

Product Positioning

     VM4 (VM400) series is a medium-size 3-port poppet mechanical valve fully interchangeable with SMC original models, positioned between mini VM1 and high-flow standard VM2 series. It supports full operating range from vacuum (-100kPa) up to 1.0MPa positive pressure with universal Rc1/8 port, dual side/bottom piping layout, robust metal construction, ultra-long service life and complete interchangeable actuator heads. Widely adopted for stroke limit detection, manual jog operation and safety interlock circuits on general automation equipment.

Core Technical Specifications

  1. Basic General Parameters

     --  Series Code: VM400 (short name VM4)

     --  Circuit Type: 3/2-way; Normally Closed (NC standard), Normally Open (NO optional

     --  Structure: Direct acting poppet type, tight sealing, dust-proof, extended service life

     --  Applicable Fluid: Compressed air, inert gas

     --  Operating Pressure Range: -100kPa ~ 1.0MPa (vacuum compatible, advantage over VM2)

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

     --  Port Thread: Rc1/8 (01); optional NPT1/8 (N01), G1/8 (F01)

     --  Flow Performance: Effective sectional area 7mm², Cv = 0.38

     --  Net Weight: Standard base model 110g

     --  Piping Layout: Side port (01), bottom port (00)

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

     -- Max Switching Frequency: 60 cycles/min for pushbutton / roller actuators; 6 cycles/min for knob / selector heads

     --  Shock & Vibration Resistance: 1000m/s² impact resistance, 70m/s² vibration resistance (heavy industrial grade)

  2. Outer Overall Dimensions (mm)

     --  Side port version: 18 × 30 × 57

     --  Bottom port version: 18 × 30 × 62

  3. 3-Port Circuit Definition & Logic

     -- Port 1(P): Main air supply inlet

     --  Port 2(A): Control signal output port

     --  Port 3(R): Exhaust port

     --  NC Normally Closed Logic: Unactuated → P cut off from A, A connected to exhaust R; After actuation → P connects to A, A disconnects exhaust R

Full Range of Interchangeable Actuator Heads

  1. Roller Lever Type (Most Popular for Stroke Limit Sensing)

     -- VM431: Standard POM plastic roller lever

     -- VM431S: Hardened steel roller lever for heavy abrasion-resistant continuous operation

     -- VM432: One-way anti-rebound roller lever to eliminate reverse trigger misoperation

  2. Straight Plunger Type

     -- VM430: Standard straight plunger base model, supports customized special actuator attachments

  3. Pushbutton & Mushroom Emergency Stop Heads (Manual Jog & Safety Interlock)

     -- VM432: Flat standard pushbutton

     -- VM432Y: High-visibility yellow mushroom head for emergency stop

     -- VM432R: Red mushroom emergency stop button

     -- VM432G: Green indicator pushbutton

  4. Knob / Selector / Lockable Safety Actuators

     -- VM434: 2-position / 3-position rotary selector knob

     -- VM435: Lockable pushbutton to prevent accidental false triggering

     -- VM436: Toggle hinge lever actuator

Model Code Explanation

  1. (Example: VM431-01-01S)

     -- VM431: 3-port circuit + roller lever actuator

     -- 01: Port thread code (Rc1/8=01; N01=NPT1/8; F01=G1/8)

     -- 01: Side port piping layout (00 = bottom port layout)

     -- S: Hardened steel roller (no suffix = standard POM plastic roller)

     -- Color suffix mark: Y=yellow mushroom, R=red mushroom, G=green pushbutton

  2. Popular Standard Models

     -- VM431-01-01A: 3-port POM roller lever, Rc1/8 side port (universal general-purpose model)

     -- VM431S-01-01A: 3-port hardened steel roller, heavy-duty abrasion-resistant working conditions

     --  VM430-01-00A: 3-port straight plunger, bottom port for customized actuator assembly

     -- VM432Y-01-01A: 3-port yellow mushroom head emergency stop valve

Core Product Advantages

     -- Ultra-wide dual vacuum & positive pressure range: Stable operation from -100kPa vacuum up to 1.0MPa, compatible with both vacuum adsorption and standard positive pressure circuits (VM2 cannot support vacuum)

     -- Reliable poppet sealing construction: Excellent air tightness, dust contamination resistance, fast response and ultra-long cycle service life

     -- Universal Rc1/8 standard thread: Widely adopted port size for general automation equipment with great interchangeability

     -- Dual side / bottom piping layout: Flexible installation layout for dense panel stacking and limited space equipment

     -- Complete full-series actuator portfolio: Roller lever, plunger, flat pushbutton, color mushroom head, rotary knob and lockable heads fully cover stroke limit, manual jog, emergency stop and selector control demands

     -- Heavy-duty industrial robust build: Solid metal valve body, optional hardened steel roller and high shock/vibration resistance for harsh continuous production lines

     -- Lubrication-free maintenance-free design: Low operating cost and clean oil-free air circuit environment

Typical Industrial Application Scenarios

     -- Equipment stroke limit detection: Cylinder & slide table full position feedback with roller lever actuator

     -- Vacuum adsorption & release control circuits (stable operation at -100kPa negative pressure)

     -- Manual jog test & equipment commissioning via panel pushbutton actuators

     -- Machine safety emergency interlock: Yellow / red mushroom head for rapid air circuit shutoff

     -- Jig & fixture pneumatic switching for clamping / unclamping loops

     -- Packaging, printing and textile machinery high-frequency mechanical trigger control

     -- Small automated workstation position signal feedback and mechanical safety interlock circuits

Selection Comparison Table: VM1 / VM2 / VM4 Series

One Sentence Summary

     SOLH VM4 medium 3-port poppet mechanical valve is equipped with universal Rc1/8 port, Cv=0.38 flow capacity, full vacuum ~1.0MPa pressure compatibility, reliable poppet sealing, complete interchangeable actuators and dual side/bottom piping layout, serving as the preferred medium mechanical control valve for all working conditions requiring vacuum operation, abrasion resistance and long-term stable performance.