KQ2E Series Bulkhead Union Push-in Fitting

SOLH KQ2E Series Bulkhead Union Push-in Fitting | Panel Mount Pneumatic Connector

Brand: SOLH by Richge Technology | SMC KQ2E Equivalent Bulkhead Union Pneumatic One-Touch Fitting

1. Product Overview

     KQ2E is the bulkhead union fitting within SOLH KQ2 one-touch fitting series, fully interchangeable with SMC KQ2E. Commonly named panel bulkhead fitting, it is the standard component for pneumatic line penetration through equipment panels and partitions. It connects internal and external air circuits, supports panel mounting of valves and cylinders, widely used in control cabinets, automation enclosures and cleanroom partitions.

2. Model Naming Rules

Model breakdown examples:

  Standard dual-tube bulkhead: KQ2E06-00A
     KQ2: KQ2 series 2nd-generation push-in fitting (white body)
     E: Bulkhead Union, panel through structure
     06: Tube outer diameter φ6mm, both ends same push-in size
     00: Dual push-in ports (tube-to-tube bulkhead)
     A: NBR seal, gasket type for repeated assembly & disassembly

  Compact small bulkhead: KQ2E04-00J
     Suffix J: Miniaturized compact version, smaller dimension for thin panels & miniature equipment

  Female thread to tube bulkhead: KQ2E06-02A
     02: Rc14 female taper pipe thread

  Full meaning: φ6 push-in port ↔ Rc1/4 female thread bulkhead connector

3. Three Structural Types

3.1 Standard Dual-Tube Bulkhead Union (KQ2EXX-00)

  Structure Features:

     • Both ends equal-diameter push-in ports. Middle section with nickel-plated brass thread + lock nut, fixed after passing through panel

     • Straight flow channel without diameter reduction or direction change, minimal pressure drop

     • Air tubes on both sides of panel can be directly connected without extra adapters after installation

3.2 Compact Mini Dual-Tube Bulkhead Union (KQ2EXX-00J)

  Structure Features:

     • Miniaturized design optimized for micro equipment and thin panels, shorter overall length & smaller thread diameter vs standard version

     • Suitable for thin panel and tight installation space, dense wiring scenarios

     • Same performance parameters as standard model, only reduced physical size

3.3 Female Thread to Tube Bulkhead Union (KQ2EXX-YY)

  Structure Features:

     • One end Rc female thread (connect solenoid valve, cylinder, valve island inside panel), the other end push-in port for external tubing

     • Comes with threaded section and lock nut for panel penetration & fixing. Realize installation: internal threaded valve + external air tube

     • Thread port directly mates standard threaded valves; only push-in port exposed outside panel for neat wiring & anti-misoperation

4. General Technical Specifications (Whole Series)

5. Selection & Installation Guidelines

  Selection Guide

     • Air tube through control cabinet / equipment panel, tubing on both sides → KQ2EXX-00

     • Solenoid / cylinder mounted inside panel, tube outside → KQ2EXX-YY

     • Miniature equipment / thin panel, limited tight space → KQ2EXX-00J

  Installation Notes

  1. Panel hole size recommendation:
     • Φ4Φ6 tube: Recommended hole diameter Φ15mm
     • Φ8Φ10 tube: Recommended hole diameter Φ20mm
     • Φ12Φ16 tube: Recommended hole diameter Φ24mm

  2. Panel thickness limit: Standard version ≤7mm; compact J version ≤5mm

  3. Tube preparation: Cut tubing flat and burr-free. Insert fully until audible click to prevent leakage.

  4. Nut fastening: Secure by tightening supplied lock nut after passing through panel; PTFE tape not required for type A (integrated gasket seal).

  5. Vacuum application: Choose type A with NBR seal for stable vacuum retention.

6. Comparison with Similar Models

7. Typical Applications

     • Control cabinet bulkhead: KQ2E06-00 passes internal tubing out of cabinet to connect external cylinders, tidy wiring

     • Solenoid valve panel mounting: KQ2E06-01A for valve inside panel, only push-in port exposed externally, neat and anti-touch

     • Cleanroom partition penetration: Sealed air line penetration between clean room and equipment without breaking clean environment

     • Dense wiring for compact equipment: KQ2E04-00J for thin panel on small machinery to save space for multi-circuit layout