HT400 Triplex Plunger Pump

The SERVA TPH400 is a horizontal reciprocating single-acting triplex plunger pump with a rated input power of 600 horsepower. Designed for intermittent well service, it is widely applied in acidizing, cementing, fracturing, sand control and other oilfield operations.

The TPH400 pump mainly consists of a power end, fluid end and spacer assembly. Its power end reduction unit adopts a worm-and-wormgear drive featuring high reduction ratio and stable power transmission. The input shaft of the power end and plungers of the fluid end are coaxially arranged, facilitating unit installation and power connection. The fluid end features a split manifold design, with an individual manifold segment dedicated to each plunger.

Optional configurations including plungers, packing assemblies and valve assemblies are available to accommodate varied requirements on working pressure & displacement, service fluid and operating conditions. The overall pump weight varies slightly with different plunger sizes and optional accessories, with a maximum deviation limited to ±5% of the rated reference weight.

The power end reduces rotational speed to amplify torque and converts rotary motion into reciprocating motion of plungers, transferring power delivered from the engine transmission case into usable energy for the fluid end. Custom configurations for the power end are available per customer operational requirements, covering the following options:

Lubrication system

Input flange assembly

Heat exchanger configuration

Worm & wormgear reduction ratio

Spacer Assembly

Most TPH400 pumps are equipped with a steel spacer assembly. This component prevents leaked process fluids from the fluid end (such as cement slurry, acidizing fluid and fracturing fluid) from penetrating into the power end housing and damaging internal components.

Fluid End

The fluid end transforms reciprocating mechanical energy from the power end into pressure and kinetic energy for cement slurry, fracturing fluid and other pumped media.

The TPH400 fluid end supports three standard plunger sizes: 3‑3/8", 4" and 4‑1/2". Custom discharge flanges, suction manifolds, plungers and other spare parts can be supplied upon client request.

Design Features

The 3‑3/8" fluid end is rated for a maximum working pressure of 20,000 psi (137.9 MPa).

Compact, lightweight construction enabling emergency air freight shipment to remote job sites worldwide.

Delivers superior performance and extended service life.

Three-piece split manifold design allowing individual replacement of each manifold segment.

English TranslationUnder normal operation and proper operating procedures, the warranty period for YOUKS plunger pumps shall be 12 months from the date of delivery by Party B (excluding wearing parts of the fluid end). Within the warranty period, if quality defects are found in non-conventional wearing parts, Party A reserves the right to request Party B to provide free replacement of new components and carry out repairs. During the warranty period, Party B shall respond to on-site inquiries and requests submitted by the Customer via phone or fax within 4 hours and propose corresponding solutions. In the event of equipment breakdowns or quality failures, Party B shall dispatch service personnel to the site for troubleshooting within 48 hours upon receipt of the notification.

Yukos was founded in 2011. Its production workshop covers an area of 35,000 square meters. We specialize in drilling, workover, cementing, high‑pressure pipe fittings and complete fracturing equipment, which are among our five core product lines. We currently serve over 1 million customers across the globe, with exports accounting for 48% of annual revenue. The workshop is equipped with more than 80 units each of large‑size CNC lathes, automated robots and high‑precision machining equipment.

Our factory has obtained ISO 9001, ISO 14001 and ISO 45001 system certifications. This means traceable operating standards and records are available for every procedure, from incoming raw‑material inspection and production‑process control to finished‑product tightness testing. All fracturing equipment, pump skids, spare parts and other items you receive have passed rigorous tests prior to factory delivery.

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