Description

Overview

This Pacific pressure protection valve 65psi is a PR-2 type valve used to isolate trailer accessory circuits and protect the primary brake reservoirs. When system pressure reaches about 65 psi the valve closes so accessory failures cannot drain air needed for safe braking.

Features

• Closes at around 65 psi to prioritise air supply for the service brake system.
• Uses 1/4″ NPT supply and delivery ports with five outlet ports for accessory circuits.
• Compact PR-2 style body with 1-1/4 inch mounting hole spacing to suit common brackets.
• Suitable for heavy vehicle trailer air systems where reliable accessory isolation is required.

Specifications and Materials

This PR-2 style pressure protection valve is a normally closed, pressure sensitive control valve used in air brake systems to shut off accessory air flow once the reservoir reaches the set closing pressure. Part number: AB8366. For further technical context on PR-2 type pressure protection valves see manufacturer technical guide for Bendix PR-2 pressure protection valves
Key functional details include a nominal closing pressure of approximately 65 psi, 1/4″ NPT supply and delivery ports, five total ports, and 1-1/4 inch mounting hole spacing for straightforward replacement in many PR-2 positions.

Compatibility and Fitment

In typical use this valve protects accessories such as air suspension, lift axles or auxiliary circuits by cutting off their air supply before the primary brake reservoir is pulled down too far. This cross-reference listing means this valve is a suitable replacement for the part numbers and applications shown. Some changes in air line plumbing may be required. 277147, 277226, 1411318, 846218, 109157, 2771478, 80801, 289970, 113618, L13530, XL22700, 2M9348, E9228724, 1027907, 6D0918, 9228724, C6TA2A435A, AXA0253X, 76022841, KN31000, 763403, 31A1207, AS30272, 20QE2101, 19606FX, 36651.

Compliance and Safety

Any work on air brake systems must follow recognised heavy vehicle maintenance practices, and the system should be fully drained and isolated before removing valves. After installation this pressure protection valve 65psi must be leak tested and function checked to confirm it closes and reopens at the expected system pressures, and only suitably trained personnel should install or service air brake components.

Trailer Applications

This PR-2 type valve is used on semi trailer and dog trailer air systems where accessories draw from the same reservoir as the service brakes. By isolating those circuits at about 65 psi it helps ensure there is enough stored air available for controlled brake applications, so it suits trailers with air suspension, lift axles, tailgate lifters or other air driven accessories that must not compromise braking performance.

Cross-reference and Suitability

This part cross-references to or suits the following equivalent part numbers and compatible alternatives:

Use this list as a guide to confirm interchange where fleet or OEM documentation references these alternative numbers.

Why Choose ICS Trailers

ICS Trailers focuses on heavy vehicle trailer parts so your air brake components can be sourced from a specialist supplier. Our team selects valves that match common PR-2 installations, which helps reduce workshop downtime during changeover. If you need related fittings or other air brake parts our range is curated for transport operators who want reliable, road ready hardware without unnecessary complexity. Browse Air Brake Parts at ICS Trailers