VR51 Series Pneumatic Two-Hand Safety Control Valve

Brand: SOLH by Richge Technology

Product Positioning

     VR51 series is a dedicated pneumatic two-hand safety control valve. Its core safety logic requires two independent buttons to be actuated simultaneously within 0.5 seconds to generate air output. It is specially developed to prevent hand crushing, pinching and cutting accidents on hydraulic presses, riveting machines, cutting equipment and other dangerous machinery, fully compliant with EN ISO 13851 and EN574 international safety standards.

Core Working Principle & Safety Logic

1. Dual Input AND Gate Logic

     -- Two independent signal input ports P1 and P2

     -- Air output at port A is only activated when both input signals arrive within a time difference less than 0.5 seconds

     -- Output air supply cuts off instantly if either button is released or one signal is lost

2. Internal Mechanical Structure

     -- 3/2-way 2-position pneumatic logic valve without spring return

     -- Built-in 0.5s time delay monitoring mechanism to eliminate single-hand sequential cheating operation

     -- Standard silencer pre-installed on exhaust port R

Full Technical Specifications

     -- Applicable Fluid: Compressed air

     -- Operating Pressure Range: 0.25 ~ 1.0 MPa

     -- Proof Pressure: 1.5 MPa

     -- Ambient Temperature: -5 ~ +60℃ (icing prohibited)

     -- Port Options: C06: φ6 metric flame retardant push-in fitting C07: 1/4" imperial flame retardant push-in fitting

     -- Net Weight: Approx. 340 g

     -- Safety Certifications: EN ISO 13851, EN574, CE, RoHS

 Model Code Definition

1.Example: VR51-C06-B

     -- VR51: Series code for two-hand safety valve

     -- C06 / C07: Push-in port size C06 = φ6 tubing connector C07 = 1/4" tubing connector

     -- Suffix B: Mounting bracket option No suffix = Rear port piping version B = Equipped with metal mounting bracket (VR51B)

2.Popular Standard Models

     --VR51-C06: φ6 push-in, rear piping (most widely used)

     --VR51-C06B: φ6 push-in with mounting bracket

     --VR51-C07: 1/4" push-in, rear piping

Core Safety Advantages

1. Mandatory Synchronous Two-Hand Operation Anti-Cheat Design

     Valid signal output only triggers when both hands actuate buttons within 0.5s; single-hand operation cannot activate equipment. Machine stops immediately once any button is released.

2. Full Pneumatic Construction for Intrinsic Safety

     100% air-driven without any electrical components; safety performance remains unaffected during power failure. Explosion-proof structure works reliably in humid, dusty and flammable workshop environments.

3. Robust Long-Life Maintenance-Free Structure

     Wear-resistant spool design with excellent anti-contamination capacity. Lubrication-free operation; silencer included as standard accessory to reduce on-site assembly workload.

4. Flexible Multi-Directional Installation

     Supports rear or bottom piping layout. Optional mounting bracket enables easy panel and equipment frame installation for various machine layouts.

Typical Safety Application Scenarios

     -- Pneumatic presses & riveting machines: Two-hand trigger to avoid hand crushing injuries

     -- Cutting & shearing machinery: Mandatory dual-button activation to prevent cutting accidents

     -- Clamping & press-fit stations: Safety interlock to eliminate pinching risks

     -- Injection molding & stamping auxiliary equipment: Safe startup interlock circuit

     -- Semi-automatic assembly production lines: Hand protection for dangerous operating zones

One Sentence Summary

     SOLH VR51 all-pneumatic two-hand safety interlock valve features built-in 0.5s synchronous detection logic, full EN ISO 13851 safety certification, 3/2-way design and flame retardant push-in fittings, serving as the standard safety component to prevent hand pinching and crushing hazards on all types of pneumatic processing equipment.