As a Custom JWS-400 Triplex Pump Assembly Manufacturer and supplier based in China, Anhui Exwell New Energy Technology Co., Ltd. supplies complete JWS-400 triplex well service pumps together with the fluid ends, power ends, housings, and spare parts that keep them running. Our 20-acre manufacturing base in Wuhu, Anhui, supports standardized production and custom machining for oil and gas projects worldwide.
We configure each JWS-400 assembly around the working pressure, flow requirement, and installation interface of the well service or drilling package. The pump is a single-acting triplex reciprocating unit rated at 400 HP (298 kW) at 286 rpm, with a 7-inch stroke and a maximum working pressure of 10,000 PSI (68,950 kPa).
JWS-400 Triplex Pump Technical Specifications
The base JWS-400 platform is supplied in piston or plunger configuration, with fluid end size options from 4" to 5.5". We machine the power end, fluid end, and housing as an integrated assembly, then match liners, pistons, valves, and seats to the required discharge pressure and fluid type.
| Parameter |
Specification |
Configuration Note |
| Rated Power |
400 HP (298 kW) at 286 rpm |
Matched to diesel, electric, or hydraulic drive |
| Stroke |
7" (177.8 mm) |
Fixed stroke; flow controlled by liner size and speed |
| Fluid End Size |
4" – 5.5" |
Selected for flow rate and pressure balance |
| Structure |
Piston or Plunger |
Piston for abrasive mud; plunger for clear fluids |
| Maximum Working Pressure |
10,000 PSI (68,950 kPa) |
Pressure rating verified by hydrostatic test |
Application Fit and Process Conditions
The JWS-400 triplex pump is specified for well service, workover, cementing, and high-pressure drilling support where a compact 400 HP reciprocating unit is required. We configure the assembly for the specific fluid, solids content, and discharge pressure of each project.
- Drilling mud service: piston configuration with hardened liners and polyurethane or HNBR packing for abrasive slurries.
- Well stimulation and cementing: plunger configuration with ceramic or tungsten carbide plungers for clear, high-pressure fluids.
- Offshore and land rigs: skid-mounted or trailer-mounted assemblies with alignment to existing power take-off.
We review the customer's operating envelope before quoting: maximum discharge pressure, continuous flow rate, fluid temperature, solids concentration, and suction conditions. This determines liner size, valve material, and whether a charge pump or pulsation dampener is required.
Configuration and Customization Scope
Every JWS-400 assembly is built from a standard power end and housing, with the fluid end and wear parts selected for the application. We accept customer drawings, worn sample parts, or reference to SPM, Halliburton, GD, or FMC series equipment for dimensional compatibility.
Customization options we configure:
- Fluid end material: alloy steel, stainless steel, or duplex for corrosive service
- Valve and seat material: hardened alloy, tungsten carbide, or ceramic
- Liner and piston size to match required flow and pressure
- Suction and discharge flange orientation, thread type, or clamp connection
- Skid, baseplate, or direct engine/gearbox mounting
Fluid End, Power End, and Assembly Integration
We manufacture the complete pump assembly in-house, including the Fluid End, Power End, and Mud Pump Housing. The power end converts rotary input into reciprocating motion through a forged crankshaft, connecting rods, and crossheads. The fluid end contains the suction and discharge valves, liners, pistons or plungers, and packing. We align and torque all components to specification before pressure testing.
For customers who already operate JWS-400 pumps, we supply replacement fluid ends, power end components, and complete Spare Part kits. Our machining centers and CMM equipment verify critical dimensions against the original equipment interface.
Quality Assurance and Acceptance Testing
Each JWS-400 assembly passes through our full-chain inspection process. Raw material is verified for chemical composition and mechanical properties. After machining, we perform non-destructive testing on pressure-containing components and high-precision geometric dimension checks using CMM equipment.
- Hydrostatic pressure test on the fluid end at 1.5 times working pressure
- Run-out and alignment verification on the power end crankshaft
- Valve seat leak test and packing friction check
- Final assembly torque record and paint/coating inspection
We provide material certificates, dimensional reports, and pressure test records with each shipment. Acceptance criteria are agreed before production begins.
Maintenance, Spare Parts, and Serviceability
The JWS-400 is designed for field serviceability. Liners, pistons, valves, and seats are replaceable without removing the fluid end from the skid. We supply wear part kits, complete fluid end assemblies, and power end bearings and seals. Our standard spare parts include:
- Valve and seat sets in matched hardness grades
- Piston and liner kits for each fluid end size
- Packing, gaskets, and O-ring kits
- Crosshead, connecting rod, and bearing components
We maintain a rapid-response service mechanism for technical consultation, order follow-up, and after-sales support. Drawings and maintenance manuals are provided with each pump.
Information We Use to Configure Your Solution
To prepare an accurate configuration and quotation for a JWS-400 triplex pump assembly, we need the following project data:
- Operating parameters: required flow rate, maximum discharge pressure, fluid type, temperature, and solids content
- Drive interface: engine model, gearbox ratio, or electric motor speed and frame size
- Installation constraints: skid dimensions, suction/discharge connection type and orientation, available space
- Reference equipment: existing pump model, drawings, or worn parts for dimensional compatibility
- Quantity and delivery: number of units, spare part requirements, and target delivery window
Send drawings or samples to Exwell.sales@chinafluidendparts.com. Our technical team completes a feasibility analysis, recommends parameters, and issues a formal quotation within 12 hours of receiving a complete inquiry.
Frequently Asked Questions
Can you build a JWS-400 pump to match my existing SPM or Halliburton unit?
Yes. We accept drawings, samples, or reference to SPM, Halliburton, GD, and FMC series equipment. Our machining centers and CMM verification ensure dimensional compatibility for direct replacement.
What is the maximum working pressure of the JWS-400 triplex pump?
The standard JWS-400 is rated for 10,000 PSI (68,950 kPa). We hydrostatically test each fluid end at 1.5 times working pressure before shipment.
Do you supply only the complete pump, or also individual fluid ends and power ends?
We supply complete JWS-400 assemblies, as well as separate fluid ends, power ends, mud pump housings, and spare part kits. Custom spare parts can be manufactured from your drawings or samples.
How do you ensure quality for high-pressure oilfield service?
We operate a full-chain inspection system from raw material entry to finished product delivery. Material chemical composition, mechanical properties, non-destructive testing, and geometric dimensions are verified using in-house laboratory and CMM equipment.
What information do you need to quote a custom JWS-400 pump assembly?
We need flow rate, discharge pressure, fluid type, drive interface, installation constraints, and any reference equipment or drawings. Our team responds within 12 hours with a technical assessment and quotation.
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