4V Series 5/2 & 5/3 Way Pneumatic Solenoid Valve | Pilot Operated Directional Control Valve

Brand: SOLH by Richge Technology

1. Product Overview & Core Structure

     The SOLH 4V series is the most universal pilot-operated pneumatic directional control valve for industrial automation, covering5/2 way (5-port 2-position) and 5/3 way (5-port 3-position) configurations. Specially designed for telescopic movement, intermediate stop and pressure holding control of double-acting cylinders, it features spool-type structure and internal pilot drive. As a standard electronic pneumatic control component, it is widely adopted in automated machinery, packaging equipment, processing jigs and pneumatic transmission systems with stable performance and versatile functions.

  1.1 Five-Port Standard Interface Definition

     • P Port: Main air inlet, connected to air supply source

     • A/B Working Ports: Output ports, connected to two chambers of double-acting cylinders to control extension and retraction

     • R/S Exhaust Ports: Pressure relief exhaust ports, normally equipped with mufflers for noise reduction and smooth ventilation

  1.2 Core Structural Features

     • Valve Core Structure: High-precision slide column spool design, low friction and sensitive switching

     • Drive Mode: Internal pilot drive, low power consumption and stable reversing performance

     • Applicable Object: Full-range matching for double-acting pneumatic cylinders

2. 5/2 Way Valve – Basic Reversing Control

     The 5/2 way structure is the mainstream basic model of the 4V series, divided into single electric control and double electric control types, adapting to different pneumatic logic and safety control requirements.

  2.1 Single Electric Control (4V110/210/310/410)

     • Working Principle: Equipped with one electromagnetic coil and reset spring. The valve reverses when powered on and automatically resets by spring force when powered off.

     • Core Characteristics: Power-off reset design with fail-safe performance, simple structure and cost-effective.

     • Typical Applications: Ordinary cylinder reciprocating motion, emergency stop reset mechanism, simple clamping and positioning equipment.

  2.2 Double Electric Control (4V120/220/320/420)

     • Working Principle: Dual coils for alternate control without reset spring. The valve maintains its current position after power off with memory retention function.

     • Core Characteristics: High positioning accuracy, energy saving (power consumption only during reversing), stable power-off position holding.

     • Typical Applications: Precise station positioning, intermediate stroke stop, long-term pressure holding and fixed-position locking scenarios.

3. 5/3 Way Valve – Intermediate Position Precision Control

     The 5/3 way three-position structure adds an intermediate neutral state on the basis of two-position reversing, realizing three core intermediate functions to meet advanced pneumatic control demands (Applicable Models: 4V130/230/330/430).

  3.1 Closed Center (C Type)

     Function: All ports fully closed at intermediate position. Realizes cylinder locking and pressure holding, supporting suspension stop and anti-falling protection.

     Scenario: Jig locking, vertical cylinder anti-drop, intermediate position fixed stop.

  3.2 Exhaust Center (E Type)

     Function: A/B working ports communicate with exhaust ports at intermediate position. The system releases pressure and the cylinder floats freely.

     Scenario: Equipment safety pressure relief, manual dragging and debugging, mechanical reset protection.

  3.3 Pressure Center (P Type)

     Function: P air inlet communicates with both A/B ports at intermediate position, converting double-acting cylinder to single-acting output.

     Scenario: Synchronous clamping, bidirectional pressure maintaining, special force balance control.

4. Model Coding Rules & Common Specifications

  1. Coding Logic: 4V [Size Code] [Control/Middle Function Code] - [Port Size]

  2. Typical Common Models

     • 4V210-08: G1/4 port, single electric control, 5/2 way (most universal standard model)

     • 4V220-08: G1/4 port, double electric control, 5/2 way (power-off memory positioning)

     • 4V230C-08: G1/4 port, 5/3 way closed center (cylinder locking & pressure holding)

     • 4V310-10: G3/8 port, single electric control, 5/2 way (large flow main circuit control)

5. Core Technical Parameters

6. Professional Selection Guidelines

  6.1 5/2 Way Two-Position Selection

     • Single Electric Control: Priority for conventional reciprocating motion and safety reset scenarios, featuring automatic power-off return and fail-safe operation.

     • Double Electric Control: Priority for positioning stations, intermediate stop and long-term holding scenarios, featuring power-off memory and accurate positioning.

  6.2 5/3 Way Three-Position Selection

     • Type C (Closed Center): For cylinder intermediate locking, suspension holding and anti-falling protection.

     • Type E (Exhaust Center): For equipment safety pressure relief, free floating and manual debugging scenarios.

     • Type P (Pressure Center): For synchronous clamping, bidirectional pressure stabilization and special pneumatic balance control.

One Sentence Summary

     The SOLH 4V series covers 5/2 & 5/3 way pilot-operated pneumatic valves with single/double electric control and three intermediate functions, being the preferred standard component for industrial pneumatic reversing, positioning, pressure holding and safety control of double-acting cylinders.