WESPC Exhaust Valve T405211 for Perkins 1204E E44TA 1206F E70TTA diesel engines

WESPC Exhaust Valve T405211 for Perkins 1204E E44TA 1206F E70TTA diesel engines

Application:

Perkins 1204E-E44TA, 1204F-E44TA, 1206E-E70TTA, and 1206F-E70TTA diesel engines (4.4L and 7.0L displacement) . This exhaust valve controls exhaust gas flow from the combustion chamber in modern Tier 4 compliant diesel engines. Commonly deployed in FG Wilson generator sets (100-200 kVA), Massey Ferguson high-horsepower tractors, JCB heavy excavators, and various industrial power units. Each 4-cylinder engine requires 4 exhaust valves; each 6-cylinder engine requires 6 exhaust valves. The valve is designed for high-efficiency combustion systems with exhaust gas temperatures up to 750°C and engine speeds up to 2,200 rpm .

Technical specifications:

Valve type: Exhaust (discharge) valve for four-stroke diesel engines
Overall dimensions: 110.00 mm length × 29.50 mm head diameter × 7.94 mm stem diameter 
Alternative dimensions: 43×9×123 mm (head×stem×length) per some aftermarket sources 
Seat angle: 45° precision-ground sealing face 
Sealing face width: 1.70 mm 
Stem type: Triple-groove (3 locks) for improved collet retention 
Material: High-chromium stainless steel alloy (European standard EN 59/SUH-4 or equivalent) 
Weight: 0.5 kg per valve (including packaging) 
Quantity per engine: 4 pieces for 1204 series (4-cylinder), 6 pieces for 1206 series (6-cylinder)

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 N for enhanced high-temperature strength and corrosion resistance . The valve head undergoes solution treatment at 1,150°C followed by age-hardening to achieve 30-35 HRC hardness, maintaining structural integrity at continuous exhaust gas temperatures up to 750°C.The stem receives advanced gas nitriding creating a 0.03-0.05 mm deep diffusion layer exceeding 800 HV hardness to resist scuffing and wear during prolonged operation. The 45° seat angle is precision-machined to Ra 0.4-0.8 µm finish, ensuring positive sealing with the valve seat insert and preventing blow-by and compression loss. The tip features induction hardening to 55-60 HRC to resist cupping under 1,200+ N valve spring loads in high-boost turbocharged applications .

Interchange part numbers:

T405211 (Perkins primary OEM specification, genuine part) 
T406777 (Perkins intake valve counterpart - do not confuse with exhaust) 
KMP Brand T405211 (warranty-backed aftermarket, 18-month warranty, high-quality replacement)
OrangeParts T405211 (European aftermarket, 1-year warranty) 
Diesel Parts Direct T405211 (authorized distributor, $21.17 base price) 
Made-in-China equivalents (various suppliers, bulk pricing available) 
Perkins 1200 series reference: Used in 1204E, 1204F, 1206E, 1206F engine builds.