Description

Overview

Spring brake hand control dash valves such as the SCTEG spring brake hand control dash valve auto shut are designed for Sealco-style park brake circuits on heavy trucks and tractors. This push-pull hand valve provides automatic shut off if supply pressure drops into the 25–35psi range, so operators gain a clear, positive park control with built-in protection.

Features

• Push-pull dash control valve for spring brake parking circuits on trucks and trailers
• Automatic shut off when inlet pressure falls into the specified park range to help secure the vehicle
• Two-hole panel mounting with 1/4in NPT inlet and outlet plus 1/8in NPT exhaust for straightforward plumbing
• Supplied with knob and nameplate so installation and identification stay consistent across the fleet

Specifications and Materials

Part number: AB8343.
This auto shut off spring brake hand control valve uses 1/4in NPT inlet and outlet ports with a 1/8in NPT exhaust, which suits common North American style air brake plumbing on road freight equipment. The typical shut off band is 25–35psi at the inlet, therefore the valve trips as reservoir pressure decays toward the safe parking threshold. Body and internal components are built for heavy vehicle air brake duty so they withstand repeated cycling in demanding service. For more background on push-pull hand valves with automatic shutoff, the manufacturer hand valve overview from Sealco explains design and operating principles for this style of component.

Compatibility and Fitment

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. 99600BL, SC99600BL, 99600, 99600B, 9366490120, 9366490130, RKN20031, MIDKN20031, ESL99600X, KN20031, 4194317016, GTA20031, 4036071, 4036072, KN20030, N20928A, N20928B, N20928CL, N20928CM, N20928CN, N20928CP, N20938CK, 929634C91, 200499C1, 338916C91, 502699C91, 990189C91, LPP-5613, SA276, 110189, 767653009926, 034055, WM673A.

Compliance and Safety

This valve must always form part of a correctly engineered air brake system that complies with relevant ADR and OEM requirements. Installers should confirm shut off pressures and dash labelling against the original build specification, then function test the park brake circuit before returning the vehicle to service. Additionally, you should leak test all joints, verify that the valve exhausts and re-applies the spring brakes as expected, and isolate the vehicle securely during any work on air lines.

Trailer Applications

In service, this spring brake hand control dash valve commonly sits in the prime mover or rigid truck cab to control the parking circuit for trailers, dollies and drive axles. It suits Sealco-style spring brake control layouts where an automatic shut off dash valve is specified. Typically, fleets use this style of valve when they want a familiar push-pull control that clearly shows park status while still protecting the system as reservoir pressure falls. As a result, it is well suited to linehaul, distribution and general freight applications that rely on consistent park brake behaviour.

Cross-reference and Suitability

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

Always confirm thread sizes, dash cut-out, knob style and operating characteristics against the original part, because different markets may use slightly varied park brake layouts even when the basic dash valve family is interchangeable.

Why Choose ICS Trailers

ICS Trailers focuses on heavy vehicle trailer parts, so our listings highlight the critical specs that workshop staff actually need. You can match this spring brake hand control dash valve auto shut off by port size, function and cross-reference, then order with confidence for local fleets. In addition, our team can help interpret cross-reference information where required so you avoid the wrong dash valve on complex road train or B-double combinations. For more spring brake and air control components, browse the Air Brake Parts range at ICS Trailers online.