Product Introduction
Auxiliary Engine Exhaust Valve is a key valve in the auxiliary engine exhaust system, used to control the emission of exhaust gas after engine combustion.
Product Details
|
Name |
Intake and exhaust valve |
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Category |
Auxiliary engine spare parts |
|
Brand |
Yanmar/daihatsu/man b&w |
|
Specifition |
As per your requirement |
|
Material |
23-8n with stellite / nimonic 80a |
|
Place of original |
Genuine/china authoried factory/high quality korea parts |
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Packing |
Standard packing |
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Condition |
Brand new |
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Terms of delivery |
Exw |
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Price |
To be negotiated |
|
Ports |
China ports and other ports in the world |
Main Offered Models
YANMAR
*6N18 AL-UV,6EY18AL,8N21AL-GV,M200,M220
DAIHATSU
* 5DK-20,6DK-20,DL16,DL20,DC17
MAN B&W
*L16/24,L20/27,L21/31,L23/30,L28/32
SUZER
* RTA68/RTA72/RTA76
CUMMINS
*6CT8.3,NT(A)855,KTA19,KTA38,KTA50,QSK19,QSM11
Main Supplied Range
Connecting rod,piston, piston ring, suction and exhaust valve,nozzle assy, nozzle holder, outlet valve, fuel injection valve, inlet and outlet valve, valve seat, bearing bush, cylinder liner, cylinder head, seal, nozzle ring, friction plate, plunger, auxiliary tool, copper sleeve, paper element.
Advantages
High heat resistance
Auxiliary Engine Exhaust Valve uses 23-8N austenitic stainless steel forgings, and Stellite alloy is welded on the valve disc and valve seat area or Nimonic 80A high-temperature nickel-based materials are used to ensure that the parts can still maintain a yield strength of ≥450MPa in a continuous high temperature environment of 720℃.
Good sealing
The exhaust valve stem is processed using CNC high-precision rolling and super-finishing technology, and the matching clearance is controlled within 0.015mm. With a multi-channel floating seal design, the leakage rate is less than 0.3% under high-pressure gas impact.
Surface hardening treatment
The working surface of the valve is treated by nitriding or surfacing with cemented carbide, and the surface hardness can reach HV850, the friction coefficient is less than 0.18, and the depth of the anti-wear layer is not less than 0.4mm. In the Cummins KTA38 engine exhaust impact test, the wear volume is less than 0.02mm in 1000 hours, which can reduce the risk of opening and closing failure caused by wear.
Delivery And Shipping Service
24*7 hours online, our services cover all main ports in the world, we can provide the cost and time saving logistics solution to our customers, to provide you with one stop comprehensive services.
FAQ
Q: What is Auxiliary Engine Exhaust Valve?
A: Auxiliary engine exhaust valve is used to control engine exhaust emissions and ensure exhaust system sealing and exhaust efficiency.
Q: What are the common materials?
A: Usually high-temperature resistant alloy steel or heat-resistant cast iron is used, which can withstand high-temperature exhaust gas and corrosive environment.
Q: What are the key dimensional parameters?
A: The valve disc diameter, valve stem length, sealing surface size and installation interface size must be strictly matched with the engine model.
Q: How to ensure valve sealing?
A: Through high-precision processing and high-quality sealing materials, ensure that the valve disc and valve seat fit closely to prevent exhaust gas leakage.
Q: What are the surface treatments?
A: Common nitriding, chrome plating or ceramic coating improves wear resistance and corrosion resistance and prolongs service life.
Q: How long is the service life of the valve?
A: Under normal maintenance, it can reach 1-3 years, depending on the operating environment and maintenance frequency.
Q: How to confirm compatibility when purchasing?
A: The engine model and technical drawings must be provided to ensure that the size and structure are fully matched.
Q: What are the common faults?
A: Poor sealing can lead to exhaust gas leakage, valve stem sticking, spring fatigue or valve disc wear.