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Genuine Bendix ST-4 Compressor Safety Pressure Relief Valve, K035675 (250 PSI)


Sale price $37.99 Regular price $54.35
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Description

The Genuine Bendix ST-4 Compressor Safety Pressure Relief Valve (Part Number: K035675) is a critical commercial vehicle safety valve preset to open at 250 PSI. Engineered to serve as a fail-safe mechanical pressure relief barrier, this heavy-duty valve is typically installed directly into an open discharge port or line of a commercial vehicle's air compressor. If an downstream line block or structural governor malfunction occurs, the precision internal spring-tension system automatically pops open at exactly 250 PSI to vent excessive system pressure, protecting expensive air brake reservoirs, compressors, and air dryers from catastrophic structural over-pressurization. Machined from solid, anti-corrosive brass composite, it features standard 1/4"-18 NPT structural male threads to ensure an airtight seal in high-vibration commercial transit environments. [1, 2, 3, 4]
⭐ Key Features & Benefits
  • Genuine Bendix OEM Protection: Factory calibrated to release pressure at exactly 250 PSI.
  • High-Strength Brass Housing: Premium corrosion resistance withstands persistent tank-mounted environmental dirt and road splash.
  • Automatic Clean Reseating: Heavy-duty internal spring matrix vents excess pressure and seals completely shut once normalized pressure ranges are restored.
  • Direct Compressor Mounting: Threads directly into the secondary compressor cylinder head discharge port for rapid pressure response.
  • Safety Code Back-up: Acts as an essential auxiliary mechanical safeguard backing up the primary system air governor assembly. [1, 2]
🔧 Uses / Applications
  • Heavy-Duty Air Compressor Safety: Essential pressure relief hardware for Bendix Tu-Flo 550, Tu-Flo 750, and SNA-01 commercial vehicle air compressors. [1, 2]
  • Commercial Truck Fleet Maintenance: Standard replacement part across class 7 and class 8 Freightliner, Volvo, Mack, and Navistar International air systems. [1]
  • Industrial Air Tank Assemblies: Applied to secondary air reservoir tanks requiring strict pressure capping thresholds up to 250 PSI max structural limit. [1]
  • High-Margin Liquidator Sourcing: Highly stable mechanical inventory asset for commercial heavy-duty brake shops, agricultural machinery yards, and fleet supply stores.
📊 Technical Specifications
Specification Detail
Manufacturer Bendix Commercial Vehicle Systems
Part Number K035675 / K105705 / K039542
Valve Model Series ST-4™ Safety Valve System
Pressure Release Point 250 PSI (Not Field Adjustable)
Thread Interface Type 1/4" - 18 NPT Male Pipe Thread
Body Material Heavy-Duty Machined Solid Brass
Venting Style Dual External Air Vent Holes
Hex Drive Size 9/16" Hex Base
Condition Brand New
🔄 Cross‑Reference / Interchange Table
Manufacturer / Fleet Sourcing Line Equivalent / Alternate Part Number
Bendix (OEM Part References) K035675 / K105705 / K039542 / 131081
Detroit Diesel K035675 / K105705
Robur Bremse 728.06.100
Caterpillar / Yellow Equipment 124-5572 / 1245572
Cummins Engine Parts 3559097 / 3403479
System Safe Warning: Never Override Safety Limits: Do not attempt to thread a 250 PSI safety valve into an air reservoir tank designed for standard 150 PSI operating ceilings. Always match the pressure stamp marked on your legacy core hardware.

Disclosure Policy

This product was acquired by Freeman Liquidators from a sale of merchandise subject to a commercial insurance loss. Freeman Liquidators is a secondary seller of products, is not affiliated with or sponsored by the manufacturer of the products and is not a manufacturer authorized seller of the products. Sale of this product by Freeman Liquidators is not subject to the policies of the manufacturer. Any warranty offered by the manufacturer is not available to you as the purchaser.

All products are NEVER USED but external packaging will have damage. Some items may be placed into other packaging to ensure safe shipping. All items are opened for inspection prior to shipment to ensure the best quality of products. Freeman Liquidators guarantees your satisfaction. If you are not completely satisfied with a purchased product, within 30 days from the date of purchase, return the product in its packaging and Freeman Liquidators will fully refund your money.

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Genuine Bendix ST-4 Compressor Safety Pressure Relief Valve, K035675 (250 PSI)

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