128mm STD Piston Rings Set for MAN D2840 D2842 D2866 D2876 800015510000

Piston Ring Materials

Piston rings are typically made from durable and heat-resistant materials to meet the demanding engine operation requirements. The most common materials used for rings include:

1, Cast Iron: Fragile piston ring material properties, best used for stock engine builds due to low tensile strength. Low cost, great option for a budget rebuild.
2, Ductile Iron: Stronger piston ring material properties with double the tensile strength of gray iron rings. Better option for performance engine builds.
3, Steel: Better tensile strength and fatigue strength over ductile iron rings. Better option for boosted and nitrous applications. Used in narrow ring width applications for better sealing and less blow-by.

Function of Piston Ringss
The primary function of piston rings is to create a tight seal between the piston and the cylinder wall. They are circular metal rings installed around the outer diameter of the pistons. Here are the main functions of piston rings:

The piston rings ensure that the compressed gases do not leak past the piston and escape into the crankcase, maintaining high pressure and promoting efficient combustion.
They prevent excessive engine oil from entering the combustion chamber and being burned with the air-fuel mixture.
These act as heat conductors to transfer heat from the piston to the cylinder wall and dissipate it into the different engine’s cooling system types.
The rings help stabilise the pistons while moving up and down in the cylinder to prevent excessive vibration and ensure smooth engine operation.

Types of Piston Rings

1, Compression Rings
This type of piston ring is the top ring on the piston and serves the crucial function of sealing the combustion chamber. Their primary role is to prevent the high-pressure gases generated during the combustion process from leaking past the piston and into the crankcase. By ensuring a tight seal between the piston and the cylinder wall, compression rings contribute to the engine’s overall power and efficiency.

2, Oil Control Rings
The oil control rings regulate the amount of oil on the cylinder walls. They are positioned below the compression rings and perform two essential functions.

First, the scraper ring, the top ring in the oil control ring set, scrapes excess oil from the cylinder walls during the piston’s downward stroke, returning it to the oil pan. Second, the oil ring expander or oil wiper ring, located below the scraper ring, helps to control the oil film left on the cylinder walls and ensures proper lubrication without allowing excessive oil into the combustion chamber.

Main Products for MAN Trucks
Cylinder Head, Cylinder Block, Crankshaft, Camshaft, Cylinder Head Gasket, Turbocharger, Connecting Rod,
Rocker Arm, Engine Bearing, Cylinder Liner/Sleeve, Piston, Piston Ring, Water Pump, Oil Pump, Engine Belt / Belt Tensioner, Air Filter, Fuel Filter etc.

Packing & Delivery
Strong and durable carton box with inner side anti-rust plastic bags.

OEM Diesel Engine Parts & Replacement Engine Parts Available.

Bolante Power Machinery Co., Ltd

Bolante Power Machinery Co., Ltd was founded in 2002 in Chongqing. Our company is located in the Southwest China, Chongqing Municipality which is an important industrial center for motorcycles, automobiles and heavy duty construction machinery. 

Chongqing has a highly comprehensive advantage in parts supporting system, government preferential policy support, complete infrastructure, thriving technological innovation, and a complete industrial chain layout.

Our Advantages

As one of the leading engine spare parts manufacturer, exporter and OEM brand parts distributor, we maintain close cooperation with upstream factories and downstream customers.

Our factory has more than 10 years of experience in the development and manufacturing, professional and efficient technology research and development team, the control process of OE product quality standards, precision and advanced production testing equipment, effectively fast delivery , professional service and support in pre-sale and after sale.

Our factory mainly produces engine spare parts including cylinder head gasket, cylinder liner sleeve, piston & ring kit, connecting rod bearings and etc.

Brand We Served
We mainly served in construction machinery, agriculture machinery and other commercial vehicle fields.  The brands we served  include:  Caterpillar, Cummins, Komatsu, Detroit, Volvo, Man, Benz, Isuzu, Deutz, Scania, Perkins, Mitsubishi, Dongfeng, FAW, Sinotruk, HOWO, Foton Yanmar and etc.

Our Main Products
Cylinder Liner, Piston Ring, Piston, Full Gasket Set, Cylinder Head Gasket, Intake Valve, Exhaust Valve, Engine Bearing, Connecting Rod, Crankshaft, Camshaft, Water Pump, Oil Pump, Injector Nozzle, Turbocharger, Oil Filter, Air Filter, Belt Tensioner. 

Our Mission

Our mission is to provide our customer with our best quality and products. Our company core values is  "quality first and honest management"