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Key Table 1: Table of FY-FXD performance parameters (mud and industrial services)

Dimensions of cylinder liners (in)	Maximum mud service flow (GPM)@390rpm	Maximum MUD service pressure (PSI)	Industrial Service Maximum Flow Rate (GPM)@510rpm	Maximum pressure on industrial services (PSI)	Required input power (HP)(mud/industry)
7.5	4,876	2556	6376	2556	85/1116
7.25	4,546	2736	5,946	2736	85/1116
7	4236	2926	5536	2926	85/1116
6.75	3,926	3156	-	-	85/-
6.5	3,646	3396	4,746	3396	85/1116
6	3086	3986	4036	3986	85/1116
5.5	2,576	4,756	3,376	4,756	85/1116
5	2116	5,746	2767	5,747	83/1097
4.5	1697	7097	2,217	7097	83/1097
4	1317	8977	1727	8977	83/1097
3.5	987	12005	1297	11,717	83/1097
3	707	17005	917	15,007	83/1097

Note: Performance data are based on 90% mechanical efficiency and 100% volumetric efficiency. The maximum working pressure applies to the hydraulic end; in practical use, the maximum piston rod load at the power end will determine the maximum allowable pressure under a specific cylinder liner size. All specifications are subject to change without notice 5.

Power End: The Indestructible Heart of the machine

The power end is the power source of the pump, and the core of its design is rigidity and durability to ensure the smooth and efficient transmission of engine power to the hydraulic end.

Frame: the use of one-piece, high-grade cast iron frame, with heavy wall thickness and scientific rib structure to ensure maximum rigidity.

Crankshaft and gear train:

Herringbone gear design. Herringbone gears provide a smoother, quieter transmission of power than spur gears and have a higher load capacity due to their longer tooth contact lines.

The material selection reflects the classic combination of wear resistance and strength: the main gear is made of high-strength ductile iron or cast steel, while the pinion is precision machined from heat-treated forged alloy steel 4.

The eccentric and the main gear are designed as a rigid one-piece casting, which not only enhances the structural strength, but also eliminates potential connection failure points, ensuring absolute reliability of power transmission 4.

Connecting rod and crosshead:

The connecting rod is made of heavy section ductile iron 4 or high grade cast iron 9 and is capable of withstanding great tensile and compressive stresses.

Key connections are made with replaceable bronze bushings, a crucial maintainability design that allows the user to restore the original accuracy of the component through low-cost component replacement, rather than costly total replacement.

Cylindrical or monolithic cast iron crossheads are specially reinforced to withstand heavy rod loads up to 11,270 lbs (5,112 kg) to ensure straight-line power transmission. 6.

Lubrication system:

Splash lubrication with large crankcase sump.

The 14-gallon (53-liter) tank lengthens the oil change cycle and helps dissipate the heat generated by the engine to keep the system at optimum temperatures.

Hydraulic end: precision forging in response to harsh realities

Design Advantages: the FY-FXD features an advanced split, l-shaped hydraulic end design, which is a significant innovation compared to conventional monolithic modules16.

Its core advantage lies in the complete separation of the suction module and the discharge module. This means that when a badly worn suction valve chamber needs to be replaced, the operator only needs to replace the individual suction module, rather than replacing the entire expensive hydraulic end assembly.

Material Options for maximum versatility:

According to the specific pump model (such as FXDA, FXDD, etc.) , hydraulic end to provide a variety of materials to meet the needs of different working conditions.

Cast iron: as standard with many conventional and mud services, the cast iron hydraulic end provides superior durability and cost effectiveness 2.

Forged Steel: preferred for high pressure, high stress applications. Forging process makes the internal grain structure of steel along the direction of force, so as to obtain the strength and fatigue resistance far superior to the casting 16. For customers operating in the most demanding deep-well drilling and fracturing environments, this is a decisive performance advantage.

Stainless Steel: provides a reliable solution for special applications dealing with corrosive fluids 2.

High chromium bimetallic liner: First Line of defense

Structure: the use of advanced bimetal composite technology manufacturing. The housing is made of high-strength forged carbon or alloy steel to provide sufficient structural strength to withstand pumping pressure and ensure tight fit to the cylinder.

Lining-wear-resistant surface: the lining is the key to the life of the cylinder liner. It is made of a proprietary high chromium cast iron alloy by centrifugal casting process.

Science of Chromium: the alloy contains not less than 27% chromium.

Ultimate hardness: after special heat treatment, the lining of the surface hardness up to HRC 60-65(Rockwell hardness C scale)20. This hardness level exceeds that of high quality tool steel files and ensures a service life of 800-1000 hours or more even under the most severe conditions20.

Bonded polyurethane piston: the core of dynamic seal

The piston moves back and forth under high pressure, and its sealing performance directly affects the efficiency of the pump.

Material Superiority: FY-FXD recommends the use of bonded polyurethane pistons22. Compared with conventional rubber pistons, polyurethane materials perform better in terms of oil resistance and water-based mud resistance, along with higher toughness, tear strength, and wear resistance22.

Bonding process: the polyurethane sealing body of the piston is firmly bonded to the solid metal piston core by chemical means. This integrated bonding process effectively avoids the common failure mode of the seal body and the core body being separated under high pressure and high temperature, and ensures that the reliable seal can be maintained throughout the working stroke, the power is transmitted to the fluid without damage 23.

Hard chromium plated piston rod: combination of strength and accuracy

The piston rod is a key component connecting the power end and the hydraulic end and withstands huge alternating loads.

Base material: the piston rod body is made of high strength heat-treated alloy steel (42CrMo) . The material provides strong core tensile and compressive strength, enough to withstand 11,270 pounds of reciprocating load without fatigue fracture.

Surface engineering-hard chromium plating: the piston rod surface is finely ground to an extremely high finish (e.g. , surface roughness Ra ≤0.2 μm) , hard chromium plating with uniform thickness (e.g. , 20-30 ΜM)26.

Dual purpose of the coating: this process provides two key advantages: 1) the chromium coating provides an extremely hard (hardness up to HRC 60-72)28, low-friction surface that effectively resists wear of the packing seal. 2) the chromium coating forms a strong anti-corrosion barrier and is critical for extending the life of the piston rod and packing seals 29.

API standard valve assembly: Pump Heartbeat

Forged for impact: valve body and seat are made of high quality forged alloy steel (20CrMnTi or 40CrNiMo) .

Heat treatment-carburizing: the use of advanced carburizing quenching process. The process diffuses carbon atoms to the surface of the steel at high temperatures to form an extremely hard"Case", while the core retains good toughness and plasticity.

Unparalleled surface hardness: this process allows the body and seat to work with surface hardness HRC ≥6030. This extreme hardness is essential to prevent wear and deformation of the valve and seat sealing surfaces under high pressure wash, ensuring a tight seal and preventing internal leakage (which is the main cause of reduced pump efficiency) .

Interchangeability of API standards: valve assemblies are manufactured strictly in accordance with API 7K. This is a key quality assurance and selling point that promises safety, reliability, and interchangeability with other global API standard components, greatly simplifying logistics and maintenance on site.

Cross-industry applications

Oil and gas drilling: this is a core application of FY-FXD. It is widely used on land and offshore drilling platforms and is responsible for circulating drilling fluid (mud)1. Its strong structure and reliable performance make it an ideal choice for high pressure and high abrasion deep well drilling conditions.

Oil well service: high pressure stability and reliability of pumps are required in cementing and acidizing operations. Fy-fxd plays an integral role in these critical operations, ensuring the safety and success of the process 4.

Mining and industry: its strong fluid handling capacity is also applicable to the mining industry. FY-FXD is capable of handling high concentrations of slurry, mine drainage, and other industrial applications that require the reliable movement of large volumes of fluid containing solid particles.

Pipeline and hydraulic services: in addition to treating abrasive muds, the versatility of FY-FXD is demonstrated in its use in oil pipeline transportation and conventional water supply systems, as well as in the design and manufacture of new products, demonstrated its high efficiency and reliability in handling fluids of a variety of different properties12.

Key Table 2: overview of FY-FXD technical specifications

The following table provides a practical tool for engineers, logistics planners, and field supervisors to quickly review pump physical and operational parameters.

Specification parameters	Numerical value
Model	Fy-fxd reciprocating two-cylinder power pump 6
Stroke length	10in. (254mm)6
Maximum load of piston rod	11,270 lbs (5,112 kg)6
Power end tank capacity	14 gal. (53liters)
Pump weight (approx)	7,090 lbs (3,216 kg)6
Total length	115.6 in (2936mm)6
Total width	59.4 in (1509mm)6
Total height	42.5 in (1080mm)6
Suction line interface	10"NPT 150 # 6
Discharge pipe connection	4"NPT 300 # 6
Intermediate axis diameter	3.25 in (82.55 mm)6