FMC Pump Piston

Structure and Materials

Structural Design:

Integrated/Split Piston Head: Select according to working conditions, split type is easy to maintain.

Sealing System: Multi-layer combination seal (such as polytetrafluoroethylene + elastomer) to ensure sealing under high pressure.

Connecting rod connection: linked with the crankshaft or cam mechanism to convert rotary motion into linear reciprocating motion.

Material Selection:

Piston Body: high-strength alloy steel (such as 4140 steel), stainless steel (316L) or ceramic coating, corrosion-resistant and wear-resistant.

Sealing Ring: carbon fiber composite material, polyurethane or Viton® rubber, suitable for high temperature or chemical corrosion environment.

Working Principle

Suction stroke: The piston moves backward, the volume of the pump chamber increases, negative pressure is formed, and the fluid enters through the suction valve.

Discharge stroke: The piston is pushed forward, the pressure increases, the discharge valve opens, and the fluid is discharged.

Pressure regulation: The flow rate is adjusted by the stroke length or the motor speed. Some models are equipped with variable frequency drive for precise control.

Application areas

Oil and gas production: fracturing pumping high-pressure fluid (hydraulic fracturing fluid), downhole water injection and crude oil pipeline transportation.

Chemical process: metering and adding corrosive chemicals (such as acids and polymers).

Industrial cleaning: high-pressure water jet equipment, the pressure can reach more than 3000 bar.

Desalination: used for the high-pressure boosting link of reverse osmosis system.

Performance advantages

High-pressure capacity: the design pressure can reach more than 10,000 psi, suitable for extreme working conditions.

High efficiency and wear resistance: surface hardening treatment (such as nitriding or tungsten carbide spraying) prolongs the service life by 30%-50%.

Modular design: quick replacement of piston components to reduce downtime.

Pistons are available in many sizes like 2.25″ 2.5″, 2.75″, 3″ and we can make many more size as per requirement.