Air Products
Catalog
Protected Reservoir Spring Brake Control Valves


Cover Plate Orientation
These spring brake valves are designed for protected reservoir systems and feature service brake priority operation. Units manufactured after October 1992 meet current FVMSS 121 standards. The built in control port prevents brake compounding.

Piping Diagrams
Mounting Hardware

110175 Plug Unit Vehicles Built Before October 1992 110185 Major Repair Kit
110609 Plug Unit For For Trailers Built After October 1992 110195 Minor Repair Kit

Part Number Supply Port (NPT) Control Port (NPT) Reservoir Port A (NPT) Reservoir Port B (NPT) Delivery Ports (NPT) Cover Plate Orientation
110170 3/8" 3/8" 1/2" 1/2" 3/8" Standard (A)
110171 3/8" 3/8" 1/2" 3/8" 3/8" 90 Degree (B)
110191 3/8" 3/8" 3/8" 1/2" 3/8" 90 Degree (B)
110310 3/8" 3/8" 3/8" 1/2" 3/8" Standard (A)
110315 3/8" 3/8" 1/2" 3/8" 3/8" Standard (A)
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