MYERS C25-25DV Pump

Reference table for horsepower requirements

Note: horsepower requirements are based on an 85% estimate of mechanical efficiency. Actual requirements may vary depending on driving mode, fluid viscosity, etc. .

Power End: the cornerstone of forging strength and durability

Crankcase and drivetrain

The heart of the power end is a sturdy monolithic cast iron crankcase. We chose cast iron as the main structure because of its superior rigidity and excellent vibration damping characteristics.

Crankshaft is the key part to convert rotary motion into reciprocating motion, and its material and technology are very important. The C25-25DV is made of automotive grade Ductile Iron and meets the ASTM A536 standard.

Internal core components

In the power transmission chain, the connecting rod and the crosshead are subjected to huge alternating stresses. C25-25DV uses a high-strength zinc alloy material on these components, which is molded by a die-casting process. This material not only has excellent strength and durability, but also has excellent corrosion resistance, ensuring long-term reliability in wet or harsh environments. The connecting rod assembly incorporates replaceable bronze wrist pin bearings, which is a key design for maintainability. When wear occurs, the user does not need to replace the entire expensive connecting rod assembly, only the bearing can be replaced to restore its original performance, greatly reducing long-term maintenance costs.

In order to support the crankshaft and to withstand large radial and axial loads, the C25-25DV is equipped with heavy-duty tapered roller bearings. This bearing type is designed for high load applications and distributes stress effectively to ensure smooth and accurate rotation of the crankshaft.

The power-side lubrication system uses a simple and efficient splash lubrication mechanism, supported by an ultra-high-capacity oil pan.

Manifold (hydraulic end valve box) construction

The main body of the hydraulic end, i. e. manifold (or valve box) , is made of high strength ductile iron by precision casting. Compared with ordinary cast iron, ductile iron has superior tensile strength and ductility. This characteristic enables it to withstand continuous working pressures up to 2500 PSI and periodic pressure pulses without fatigue and stress cracking, which is essential for applications with frequent pressure fluctuations such as sewer dredging.

Cylinder liner technology

Cylinder liner is the track of piston reciprocating motion, and it is also one of the most seriously worn parts in the hydraulic end. The C25-25DV uses a composite solution: tapered stainless steel cylinder liners with ceramic coatings. The ceramic coating on the inside provides an extremely hard (usually over 90 degrees Rockwell) moving surface with an extremely low coefficient of friction. This super-hard surface can effectively resist the erosion of abrasive particles such as sand and drill cuttings in the mud. At the same time, its smooth and low friction characteristics significantly reduce the wear of the piston packing seal, which directly prolongs the replacement cycle of the seal and the cylinder liner itself, and effectively reduces the frequency and cost of shutdown maintenance.

Valve Assembly

The C25-25DV is equipped with a flat valve made of acetal resin (POM) . The choice of acetal as the valve material is based on its overall excellent performance. First, it has extensive tolerance to industrial cleaning agents, solvents, and a variety of chemicals. Secondly, its water absorption rate is very low, to ensure the stability of the size in a humid environment, will not affect the sealing performance due to moisture expansion.

Piston and packing sealing system

Sealing system is the key barrier to prevent the leakage of high pressure fluid and protect the power end.

Standard configuration: the C25-25DV's standard piston packing is made of fabric-reinforced nitrile rubber (Buna-N) and is designed as a multilayer v-ring construction. Nitrile rubber (NBR) is a versatile elastomer with excellent performance and good tolerance to oils, water-based muds and most neutral chemicals. It is a cost-effective choice. The fabric reinforcement provides additional structural strength and prevents the seal from being extruded under high pressure.

Optional materials: to meet the requirements of more extreme working conditions, we provide * * fluoroelastomer (Viton/FKM) * * as an optional sealing material. When applications involve high temperatures (over 140 °F) or highly corrosive chemical solvents, Viton, with its superior resistance to high temperatures and chemical corrosion, is able to provide reliability and service life far beyond that of NBR. By offering this option, we demonstrate our expertise in customizing our solutions to our customers' specific applications.

Simplify maintenance on site

We are well aware that in the busy work site, every maintenance means the loss of time and cost. Therefore, the design of the C25-25DV incorporates a number of features that facilitate rapid maintenance on site:

Convenient valve repair: the pump valve assembly is designed to allow inspection and replacement without removing the pump or hydraulic end from the system. This feature greatly reduces downtime due to valve wear.

Modular wear parts: packing, cylinder liners, valves and other key wear parts are designed to be independently replaceable modules. Our Service Manual provides clear instructions for replacement, enabling well-trained technicians to complete on-site repairs quickly.

To further support our customers, we provide the following concise troubleshooting guide to help quickly diagnose common problems:

Simple troubleshooting guide

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