# KL-PU Straight Union Quick-Tight Pneumatic Fitting

Date: 2026-05-07
Categories: Pneumatic Fittings
URL: https://homipneu.com/kl-pu-union-quick-tight-fitting.html

## Product Summary

KL-PU pneumatic fittings are straight union quick-tight connectors designed for fast and reliable tube-to-tube connection in pneumatic systems.

As part of the KL series quick-tight fittings, KL-PU enables rapid installation and secure sealing without complex tools, improving efficiency in industrial applications.

The fitting features a nickel-plated brass body, providing excellent corrosion resistance, durability, and long service life.

Quick connect technology allows tubing to be inserted and locked instantly, ensuring stable and leak-resistant performance in compressed air systems.

OEM and ODM customization services are available for tube sizes, materials, and branding requirements.

### Specifications

Parameter
Details

Product Type
Pneumatic Fittings

Model
KL-PU

Structure
Straight Union

Connection
Tube to Tube

Installation
Quick-Tight

Material
Nickel-Plated Brass

Operating Fluid
Air

Working Pressure
0 – 1.0 MPa

Temperature Range
0 – 60°C

Applicable Tubing
PU / Nylon Tube

Straight union pneumatic fittings provide stable connection and efficient air transmission in pneumatic systems.

![how to order Pneumatic Fitting](https://homipneu.com/wp-content/uploads/2026/05/20260503212552146290.webp)

### Model: Model: (Example KL-PU4)

4

6

8

10

12

14

16

### Key Features

Quick-tight installation designStraight union structure (tube to tube)Nickel-plated brass for corrosion resistanceCompact and efficient airflow connectionFast installation without toolsStable and leak-resistant sealing

### Applications

Pneumatic control systemsUsed for connecting two air tubes directly

Industrial automation equipmentEnsures stable tube connection in machinery

Air distribution systemsSupports straight airflow transmission

Machinery equipment pipingIdeal for extending pneumatic tubing

Maintenance and replacement scenariosAllows quick tube extension and repair

### Product Function

KL-PU fittings are designed to directly connect two pneumatic tubes, enabling efficient air transmission without changing airflow direction.

Compared to elbow or threaded fittings, KL-PU provides a **straight-through connection**, minimizing airflow resistance and simplifying system layout.

### Product Structure & Size Range

KL-PU4 / KL-PU6 / KL-PU8 / KL-PU10 / KL-PU12Tube sizes: 4mm → 12mmStraight union structureQuick-tight locking mechanismCompact inline design

### Why Choose Our Pneumatic Fittings

Professional KL series pneumatic fitting manufacturerOEM / ODM customization for quick-tight union fittingsEfficient tube-to-tube connection solutionReliable nickel plated brass pneumatic connectorsDurable fittings for industrial environmentsFast delivery and global B2B supply support

### FAQ

**Q1: What is a KL-PU pneumatic fitting?**It is a straight union quick-tight pneumatic fitting used to connect two air tubes directly.

**Q2: What is a union pneumatic fitting used for?**It connects two tubes in a straight line for continuous airflow.

**Q3: What is the difference between KL-PU and KL-PC?**KL-PU connects tube to tube, while KL-PC connects tube to threaded ports.

**Q4: What tubing is compatible with KL-PU fittings?**It is suitable for PU tubing and nylon tubing.

**Q5: Can KL-PU fittings be customized?**Yes, OEM and ODM customization is available for sizes and materials.

### CTA

Looking for reliable KL-PU straight union quick-tight pneumatic fittings?Contact us today for OEM/ODM solutions, bulk pricing, and fast delivery.