Miniature Miniature

Product Overview

The ROSS Controls provides panel mounting brackets and panel nuts for ROSS Miniature Series filter/regulator/lubricator units. These mounting accessories allow Miniature Series regulators and integrated filter/regulators to be installed flush through a panel surface, creating a clean, professional installation without external brackets protruding from the panel face.

The Series offers three ordering options: the 873K77 complete kit (includes both bracket and panel nut), the 872K77 bracket only, and the 874K77 panel nut only. This flexibility allows engineers to order only what is needed for their specific installation whether adding a panel nut to an existing bracket or replacing a damaged component.

The mounting system requires a 1.19-inch (30 mm) diameter hole in the mounting panel. The bracket attaches to the Miniature Series regulator or filter/regulator body, and the panel nut secures the assembly from the opposite side of the panel, clamping the unit firmly in place with no additional hardware required.

This mounting approach is widely used in pneumatic control panels, machine enclosures, and test stands where regulators are set and monitored from the front of a panel while the air preparation assembly remains behind the panel. The Miniature Series panel mount accommodates 1/8 and 1/4 inch port size units.

Key Engineering Features

• Through-Panel Mounting - Allows Miniature Series regulators and integrated filter/regulators to mount flush through a panel for a clean front-of-panel adjustment interface, with all tubing and connections behind the panel.
• Three Ordering Options - Available as complete kit (873K77 - bracket and panel nut), bracket only (872K77), or panel nut only (874K77), enabling precise procurement to match service and installation requirements.
• Compatible with All Miniature Series FRL Units - Designed for the complete range of ROSS Miniature Series filters, regulators, lubricators, and integrated filter/regulators with 1/8 and 1/4 inch ports.
• Standard Panel Hole Size - Requires a 1.19-inch (30 mm) diameter panel cutout, a standard dimension that is compatible with common panel drilling standards for pneumatic component mounting.
• Secure Two-Part Clamping System - Bracket and panel nut together clamp the regulator body to the panel from both sides, providing vibration-resistant mounting without nuts, bolts, or threaded inserts in the panel.
• Compact Miniature Platform Support - Enables the space-efficient Miniature Series to be panel-mounted in applications where footprint is limited, such as machine control enclosures and OEM pneumatic panels.

Technical Specifications

General Specifications

Temperature Ratings

The Series bracket hardware is compatible with all standard Miniature Series FRL assemblies within the Miniature Series operating temperature range.

Important: Temperature ratings are governed by the Miniature Series FRL units being mounted, not by the bracket hardware. Verify the FRL unit temperature ratings for the specific application environment.

Certifications & Compliance

Typical Applications & Industries

Machine Control Panels and OEM Equipment

• Miniature Series regulator panel-mounted in a machine control enclosure door for operator-facing pressure adjustment, with supply and downstream connections accessible from inside the enclosure.
• Integrated filter/regulator panel-mounted in an OEM machine where the Miniature Series platform is specified for 1/4 inch port supply lines, providing a clean external installation that protects the assembly from mechanical damage.
• Multiple Miniature Series regulators panel-mounted side-by-side in a pneumatic control panel, each fed from a common manifold behind the panel for independent circuit pressure control.

Test and Measurement Equipment

• Miniature Series filter/regulator installed through a test fixture panel for clean, accessible pressure regulation at individual test circuits, with 1/8 inch downstream connections to precision test ports.
• Laboratory pneumatic supply regulation using Miniature Series panel-mounted regulators for precise pressure control at bench-top test stations where panel space is limited.

Packaging and Food Processing

• Miniature Series panel-mounted on individual packaging machine stations for pressure regulation of small-bore actuators, providing operator access to regulator adjustment without accessing internal machine components.
• Panel-mounted Miniature Series integrated filter/regulators on food processing equipment where all air preparation hardware must be behind panels for hygiene compliance, with the regulator knob accessible externally.

Automotive and Industrial Assembly

• Miniature Series filter/regulators panel-mounted on assembly tooling where compact size and clean installation are required for pneumatic torque tools or precision actuators.
• Retrofit panel mounting of Miniature Series regulators on existing pneumatic control panels to replace inline units with panel-mount configurations for improved operator ergonomics.
• Miniature Series panel-mounted on dedicated circuit supply panels in multi-circuit pneumatic systems where each circuit requires individual pressure adjustment and filter protection.

Ordering and Model Number Configuration

The Series Miniature Bracket Kit is available in three configurations to match installation and service requirements. Order the complete kit (873K77) for new installations; order bracket (872K77) or panel nut (874K77) separately for replacement or specialized assembly.

Order 873K77 for new panel mount installations of Miniature Series FRL units - includes both bracket (872K77) and panel nut (874K77).

Order 872K77 bracket only when panel nut is already in place and only the bracket requires replacement.

Order 874K77 panel nut only when bracket is retained and only the panel nut requires replacement.

Panel hole must be drilled to exactly 1.19 inches (30 mm) diameter before installation. Oversized holes will not allow proper clamping.

One Series kit mounts one Miniature Series FRL unit. For multiple units, order one kit per unit.

Accessories

Miniature Series FRL Units

The Series bracket kit is designed for these ROSS Miniature Series products: Miniature Filters (1/8, 1/4 port), Miniature Regulators (1/8, 1/4 port), Miniature Lubricators (1/8, 1/4 port), and Miniature Integrated Filter/Regulators (1/8, 1/4 port, flow to 24 scfm).

Related Bracket Kits for Other FRL Sizes

ROSS offers panel mounting bracket kits for all FRL sizes in the product line.

Related Products & Accessories

• Miniature Series FRL Units - ROSS Miniature Series filters, regulators, lubricators, and integrated filter/regulators for 1/8 and 1/4 inch ports, flow to 24 scfm. https://www.rosscontrols.com/en/series/62-bantam-series
• 165 Series Bantam Bracket Kit - Long screw mounting kit for two-unit and three-unit Bantam modular FRL combinations. https://www.rosscontrols.com/en/series/165-bantam
• 167 Series Mid-Size Bracket Kit - Panel mounting bracket and panel nut kit (876K77) for Mid-Size Series FRL regulators and integrated filter/regulators. https://www.rosscontrols.com/en/series/167-mid-size
• 162 Series Full-Size Bracket Kit - Panel mounting bracket and panel nut kit (879K77) for Full-Size and MD4 Series FRL units. https://www.rosscontrols.com/en/series/162-full-size
• 172 Series Mid-Size and Full-Size Port Blocks - Female port blocks for connecting mid-size and full-size FRL assemblies to supply and downstream piping. https://www.rosscontrols.com/en/series/172-mid-size-full-size

Frequently Asked Questions (FAQ)

Q: What is included in the 873K77 Miniature bracket kit?

A: The 873K77 kit includes one bracket (872K77) and one panel nut (874K77). Together these two components are all that is required to panel-mount a single Miniature Series FRL regulator or integrated filter/regulator.

Q: What size hole must be drilled in the mounting panel?

A: The mounting panel requires a 1.19-inch (30 mm) diameter circular hole. This must be cut cleanly with correct dimensions - an oversized hole will prevent proper clamping of the bracket and panel nut assembly.

Q: Can I use the series bracket kit with Miniature Series inline-mounted units?

A: The Series bracket kit is specifically for panel-mounted installation. Inline Miniature Series units typically do not require this bracket kit. However, some Miniature Series models support both mounting options - check the individual FRL unit data sheet to confirm panel mount compatibility.

Q: What is the difference between the bracket (872K77) and the panel nut (874K77)?

A: The bracket (872K77) attaches directly to the Miniature Series FRL unit body and extends through the panel hole from the rear (inside the enclosure). The panel nut (874K77) threads onto the bracket from the front of the panel, sandwiching the panel material between the bracket and nut to clamp the unit securely.

Q: Can the panel nut be tightened with standard tools?

A: Yes, the 874K77 panel nut has a hex profile that accepts a standard open-end or adjustable wrench. Tighten to snug contact with the panel face; do not overtighten, as this can crack polycarbonate panel materials or damage the bracket threads.

Q: Is the series compatible with Miniature Series units that have metal bowls?

A: Yes, the series bracket kit is compatible with Miniature Series units regardless of bowl type (polycarbonate or metal). The bracket attaches to the regulator body, which is identical regardless of bowl selection.

Q: Can I use the Miniature bracket for other ROSS FRL sizes?

A: No. Each FRL size has a specific bracket kit with dimensions matched to that unit's body geometry. The Series (873K77) is sized exclusively for Miniature Series units. For Mid-Size units use 876K77; for Full-Size and MD4 units use 879K77.

Q: Is there a maximum panel thickness for the series?

A: Consult the dimensional drawings in the ROSS FRL catalog for panel thickness compatibility. Panel thickness affects the bracket-to-nut clamping engagement. Standard industrial panel thicknesses from 1/16 to 3/16 inch are typically accommodated.

Q: Are replacement panel nuts available separately?

A: Yes. The 874K77 panel nut is available separately for replacement without purchasing a complete kit. This is the economical choice when the bracket remains in good condition and only the panel nut is lost or damaged.

Q: What happens if I use the wrong bracket size for my FRL unit?

A: Using an incorrect bracket kit will result in improper fit - either the bracket will not attach to the FRL unit body or the panel hole dimensions will not match, making secure mounting impossible. Always verify that the bracket kit model number matches the FRL unit series being mounted.

Q: Is the series suitable for outdoor installations?

A: The bracket hardware is metallic and suitable for industrial environments. For outdoor installations, verify that the Miniature Series FRL unit being mounted is appropriate for the ambient temperature range (40 to 125F for polycarbonate bowl; 40 to 175F media for metal bowl) and consider protection from direct moisture exposure.

Q: Where can I get installation instructions for the series?

A: Installation instructions are included in the ROSS FRL catalog (Form A10120), available for download at rosscontrols.com. Dimensional drawings for panel mounting with the series are also included. Contact ROSS Controls at (800) 438-7677 for additional technical assistance.

Installation & Maintenance Guidelines

• Mark and drill a clean 1.19-inch (30 mm) diameter hole in the mounting panel. Deburr the hole edges to prevent bracket damage and ensure flat contact.
• Attach the 872K77 bracket to the Miniature Series FRL unit body following the orientation instructions in the ROSS FRL catalog.
• Insert the bracketed FRL unit through the panel hole from the rear (inside the enclosure) until the bracket shoulder contacts the panel surface.
• From the front of the panel, thread the 874K77 panel nut onto the bracket by hand until snug.
• Tighten the panel nut with a wrench to clamp the assembly against the panel. Do not overtighten.
• Connect supply and downstream tubing or piping to the FRL unit ports while the unit is secured in the panel.
• Pressurize the system and verify for leaks at all port connections.
• Set the regulator to the desired outlet pressure by turning the adjustment knob from the front panel.

Warranty & Global Support

ROSS Controls provides a one-year warranty on all products, covering defects in material and workmanship from date of purchase.

Global technical support is available through ROSS offices in the USA (headquarters in Ferndale, Michigan), Canada, Brazil, Germany, France, United Kingdom, India, China, and Japan.

Contact ROSS Controls USA at (800) 438-7677 or visit rosscontrols.com for product configuration, technical support, and distributor locator services.

For the complete Miniature Series FRL accessory catalog, dimensional drawings, and installation instructions, visit rosscontrols.com or contact ROSS Controls at (800) 438-7677.

Download Catalog: https://www.rosscontrols.com/en/series/166-miniature