SPMK Series Stainless Steel Bulkhead Union Fittings

Features & Key Specifications

Features & Key Specifications of Our SPMK Series:

Secure Panel Mounting:

The threaded body and included lock nut allow for easy and secure installation in a panel hole, providing a stable, straight-line pass-through for your tubing.

Straight Tube-to-Tube Connection:

This bulkhead union features two push-in ports of the same size, designed to connect a tube on the inside of an enclosure to a tube on the outside.

Premium Stainless Steel Construction:

Available in both 304 and 316 stainless steel, these fittings offer exceptional resistance to corrosion, chemicals, and high temperatures.

Comprehensive Size Options:

We stock a full range of sizes to fit any system.

Tube OD (Metric): 4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm

Tube OD (Inch): 5/32", 1/4", 5/16", 3/8", 1/2"

Food-Grade & Oil-Free Design:

Manufactured to be oil-free and compliant with the Food Hygiene Law, ensuring they are safe for use in sanitary applications.

Application Fields

The Professional Solution for Panel Pass-Throughs:

Control Cabinets & Enclosures: Creating external connection points for pneumatic lines that need to connect to internal components.

Machine Walls & Frames: Routing pneumatic lines cleanly and securely through machine structures.

Robotics & Automation: Connecting tubing between different sections of a robot arm or automated cell.

Food & Beverage Equipment: A hygienic method for passing pneumatic lines through stainless steel panels and walls.

Technical & Selection Guide

When to Use a Bulkhead Fitting

A bulkhead fitting is essential whenever a pneumatic line needs to pass through a solid barrier. It provides a secure, sealed mounting point that prevents the tube from chafing against the panel edge and protects the connections from being pulled out or damaged.

Choose this SPMK (Bulkhead Union) if: You need to connect a tube on both sides of the panel.

Choose a Bulkhead Connector (Male/Female) if: You need to connect a tube on one side and a threaded component on the other.

FAQ

Frequently Asked questions

Q: How do I install this fitting?

A: Drill a hole in your panel that matches the "T" mounting thread diameter from the datasheet (e.g., M11 for a 4mm tube fitting). Insert the fitting through the hole and secure it from the other side using the included lock nut.

Q: What is the difference between a bulkhead union and a straight union?

A: A straight union (our SPU series) joins two tubes in open space. A bulkhead union is specifically designed to do the same thing, but while being securely mounted through a panel or wall.

Q: Can this fitting be used in a washdown environment?

A: Absolutely. The 316 stainless steel construction and secure panel mounting make it ideal for equipment that undergoes frequent and rigorous washdown procedures.