71R8453 Red Dot Gold Bulbless Block-Type Expansion Valve – 12°F Superheat

The Red Dot 71R8453 Gold Bulbless Block-Type Expansion Valve is engineered for mobile HVAC systems that require higher superheat control while maintaining a compact, rugged bulbless block design. By eliminating the external sensing bulb, this valve improves durability and consistency in high-vibration, on-highway applications.

This model features a gold-finish housing, an elevated 12°F superheat rating, and Stat-O-Seal connections on all ports for secure, leak-resistant sealing. With a 1½-ton capacity and a 53.5 psig pressure limit at 85°F, the 71R8453 is commonly used in Freightliner-based platforms and related OEM systems.

Use the specifications and interchange numbers below to confirm the correct match before ordering.

Product Specifications

• Part Type: A/C Expansion Valve

• Valve Style: Bulbless Block-Type

• Finish: Gold

• Red Dot Part No.: 71R8453

• Red Dot Factory Part No.: RD-5-12520-0P

• OE Reference: BOA 80-321-00-269

• Rated Capacity: 1½ Ton

• Superheat Rating: 12°F

• Pressure Limit: 53.5 psig @ 85°F

• Mounting: Bulbless block, M8 × 1.25-6H threaded mount

Connections (Stat-O-Seal):

Hose Side

• Inlet: #6 Stat-O-Seal

• Outlet: #10 Stat-O-Seal

Evaporator Side

• Inlet: #8 Stat-O-Seal

• Outlet: #10 Stat-O-Seal

OEM & Interchange Numbers

OEM Numbers:

• Freightliner / OEM: BOA 80-321-00-269

• Mack: 4379-RD5125200

• Volvo: RDHRD5125200P

Aftermarket / Interchange:

• AirSource / MEI: 1618

• Alliance: ABP N83 308231, ABP N83 308241

• Texas Truck AC: 450-6602 (family reference)

• Road Choice: EV01410

• Red Dot Aftermarket: 71R8453

Additional Interchange References:
1618, 1812005, 4379-RD5125200P, ABP N83 308241, RDTRD5125200P, RDT71R8453

(Always verify Stat-O-Seal fitting type, mounting thread, superheat rating, and pressure limit prior to installation.)