WESPC Exhaust Valve Seat 3314A261 for Perkins six cylinder diesel engines

WESPC Exhaust Valve Seat 3314A261 for Perkins six cylinder diesel engines

Application:

Perkins 1104D-E44TA, 1106D-E66TA, 1106D-E70TA, and 1106C-E66TA six-cylinder diesel engines (6.6-7.0 L displacement), as well as Cater C6.6, C7.1, and C7 industrial diesel engines. This exhaust valve seat insert is specifically designed for high-temperature, high-pressure turbocharged applications where exhaust gas temperatures exceed 700°C. Each six-cylinder engine requires 6 exhaust valve seat inserts. Common applications include JCB heavy excavators, FG Wilson 100-200 kVA generator sets, medium-duty agricultural tractors, compact wheel loaders, and Cater articulated trucks, wheel loaders, and off-highway equipment operating in continuous-duty environments with EGR systems.

Technical specifications:

Outer diameter: 33.70 mm (1.327 inches) 
Inner diameter: 28.25 mm (1.112 inches)
Height (thickness): 6.00 mm (0.236 inches)
Seat angle: 45° precision-machined sealing surface
Hardness: ≥ 45 HRC after vacuum heat treatment
Material composition: High-chrome stainless steel forging (12-15% Cr)
Surface finish: Ra 0.4-0.8 µm on sealing face
Interference fit: 0.05-0.10 mm press-fit into cylinder head
Quantity per engine: 6 pieces for inline-6 cylinder configuration
Installed depth: 0.5-1.0 mm below cylinder head fire deck surface

Material & performance features:

Manufactured from premium high-chromium stainless steel forging containing 12-15% Cr, 1.0-1.5% C, with additions of Mo and V for enhanced wear resistance and thermal stability. The seat undergoes precision CNC profiling to achieve exact 45° seat angle with concentricity within 0.01 mm, ensuring positive sealing with the exhaust valve face and preventing blow-by and compression loss.

Interchange part numbers:

PERKINS 3314A261 (primary OEM specification for exhaust valve seat)
CATER 377-0400, 276-8133 
PERKINS 3314A251 is the INTAKE valve seat (DO NOT use for exhaust applications)
KMP Brand 3314A261-KMP (warranty-backed aftermarket) 
BAILEPART BP-3314A261 (quality aftermarket)
Plant & Machine Parts 3671019762 
IZUMI C6.6 1106D-E66T reference 
Heavy Duty Pros 3314A261