1. Detailed Product Introduction
This comprehensive fluid end parts collection covers every critical component needed to keep the NATIONAL 14-P-220 mud pump functioning reliably, directly matching TSC OEM specifications and ensuring full compatibility with the pump’s fluid end assembly. Key components include complete fluid end assemblies , studded fluid end discharge modules , discharge modules only, studded fluid end suction modules , suction modules only , various studs and nuts , valve components, liner components , and discharge connection assemblies .
2. Core Functional Specifications
The fluid end is the backbone of the NATIONAL 14-P-220 mud pump, and each component in this parts list plays a critical role in ensuring smooth, efficient operation. The complete fluid end assembly (TS-80718020) integrates all key components into a single, ready-to-install unit, providing a one-stop replacement solution for full fluid end overhauls and eliminating the need to source individual parts—saving time and reducing the risk of incorrect part selection. Studded fluid end discharge and suction modules (TS-1295240, TS-1295243) simplify maintenance by including all necessary studs and nuts for quick assembly, while standalone discharge and suction modules (TS-1259241, TS-1259244) offer flexibility for teams that prefer to reuse existing hardware, reducing inventory costs.
3. Recommended Applicable Operating Conditions
These NATIONAL 14-P-220 fluid end parts are engineered to perform reliably across the harshest global deep drilling and well stimulation environments, aligned with the pump’s 2,200 HP rated capacity. They are suitable for deep onshore oil & gas drilling rigs (well depths up to 15,000 feet), high-pressure well completion and stimulation operations, large-scale workover rigs for well maintenance and rehabilitation, and deep geothermal drilling projects—all common applications for the NATIONAL 14-P-220 mud pump. These parts are designed to support the pump’s role as a critical “heart device” in drilling operations, where reliability is key to avoiding costly shutdowns and project delays.
4. Proactive Maintenance & Service Recommendations
To maximize the service life of NATIONAL 14-P-220 fluid ends, minimize downtime, and preserve optimal pump performance, follow these field-proven maintenance protocols—designed to address common failure modes and extend component life. These recommendations are tailored to the specific components in this parts list and align with the NATIONAL 14-P-220’s operational requirements, helping teams reduce maintenance costs and improve overall efficiency.
Inspect all seals (TS-1540163, TS-2410031438, TS-2410031440, TS-1295257, TS-1540021) every 300 operating hours for signs of wear, cracking, or leakage; replace worn seals immediately to prevent mud contamination and pressure loss, which can reduce pump efficiency by up to 15%. Check all studs and nuts (TS-2408027, TS-6300240, TS-2408047, TS-6300200, TS-2408048, TS-6300320) every 200 operating hours for proper torque (1,800–2,200 ft-lbs for powerframe studs); retorque if necessary and replace any studs with stripped threads or signs of damage. Inspect valve guide components (TS-1292140, TS-1292141, TS-6511416) every 500 operating hours for wear; replace if the inner diameter exceeds OEM specifications by more than 0.0035mm.
We supply the following spare parts:
| ITEM | PART NUMBER | DESCRIPTION |
| TS-80718020 | ASSY, COMPLETE FLUID END W/VALVE SERVICE & SUCTION MANIFOLD | |
| 1 | TS-1295240 | MODULE, STUDDED FLUID END DISCHARGE (INCLUDES ITEMS 2-10) |
| 2 | TS-1259241 | DISCHARGE MODULE ONLY |
| 3 | TS-2408027 | STUD, POWERFRAME |
| 4 | TS-6300240 | NUT, POWER FRAME STUD |
| 5 | TS-2408047 | STUD, LINER BUSHING |
| 6 | TS-6300200 | NUT, LINER BUSHING STUD |
| 7 | TS-2408048 | STUD, SUCTION TO DISCHARGE MODULE |
| 8 | TS-6300320 | NUT, SUCTION TO DISCHARGE MODULE STUD |
| 9 | TS-2408049 | STUD, VALVE COVER |
| 10 | TS-6300240 | NUT, VALVE COVER STUD |
| 11 | TS-1295243 | MODULE, STUDDED FLUID END SUCTION (INCLUDES ITEMS 12-14) |
| 12 | TS-1259244 | SUCTION MODULE ONLY |
| 13 | TS-2408049 | STUD, VALVE COVER |
| 14 | TS-6300240 | NUT, VALVE COVER STUD |
| 15 | TS-1295165 | BUSHING, LINER |
| 16 | TS-1295172 | CAP, VALVE COVER (THREADED) |
| 17 | TS-1295176 | RING, THREADED |
| 18 | TS-1295174 | RETAINER, SEAL |
| 19 | TS-7601-0040-11 | PULLER,SEAL RETAINER |
| 20 | TS-1540163 | SEAL, VALVE COVER |
| 21 | TS-1292140 | HOLDER, VALVE GUIDE INSERT |
| 22 | TS-1292141 | INSERT, VALVE GUIDE |
| 23 | TS-6511416 | PIN, DOWELL |
| 24 | TS-1295257 | SEAL, MODULE & WEAR PLATE |
| 25 | TS-1295266 | PLATE, WEAR |
| 26 | TS-1295252 | CONNECTOR, DISCHARGE |
| 27 | TS-1295175 | RING, DISCHARGE CONNECTOR BACK UP |
| 28 | TS-700030711 | CAPSCREW, DISCHARGE CONNECTOR |
| 29 | TS-7619050 | WASHER, DISCHARGE CONNECTOR CAPSCREW |
| 30 | TS-1295253 | ADAPTER, DISCHARGE CONNECTOR |
| 31 | TS-2410031438 | SEAL, DISCHARGE CONNECTOR TO DISCHARGE ADAPTER |
| 32 | TS-2410031440 | SEAL, DISCHARGE CONNECTOR & DISCHARGE ADAPTER |
| 33 | TS-1295166 | CLAMP COMPLETE, LINER |
| 34 | TS-700049110 | CAPSCREW, LINER CLAMP |
| 35 | TS-6309140 | NUT, LINER CAPSCREW |
| 36 | TS-1295169 | PIN, LINER CLAMP |
| 37 | TS-1295168 | CONNECTOR, LINER CLAMP |
| 38 | TS-7006609 | CAPSCREW, DISCHARGE SPACER FLANGE |
| 39 | TS-2408014 | STUD, DISCHARGE FLANGE |
| 40 | TS-6300180 | NUT, DISCHARGE FLANGE STUD |
| 41 | TS-1540021 | SEAL, SUCTION MANIFOLD |
5. On-Site Field Failure Repair Cases
Case 1: Discharge Connector Seal Leak Causing Pressure Loss
A deep onshore drilling rig operating a NATIONAL 14-P-220 pump reported a gradual drop in fluid end pressure, from the rated 10,000 PSI to 8,500 PSI, which slowed drilling operations and increased fuel consumption. Inspection revealed a worn discharge connector seal (TS-2410031438), which was leaking drilling mud and causing the pressure loss. Technicians replaced the seal with a TSC OEM-equivalent unit, torqued the discharge connector to specification (1,600 ft-lbs), and pressure-tested the system. The pump was restored to full operational capacity within 25 minutes, avoiding over $4,800 in downtime costs and restoring drilling efficiency.
Case 2: Valve Guide Insert Wear Leading to Erratic Mud Flow
A well completion contractor using a NATIONAL 14-P-220 pump in a high-pressure well completion project noticed erratic mud flow and abnormal noise from the pump, which threatened to delay well completion. Troubleshooting identified excessive wear in the valve guide inserts (TS-1292141), which was causing valve misalignment and leakage. Technicians replaced the valve guide inserts and holders (TS-1292140), adjusted valve clearances, and tested the pump. The pump’s mud flow returned to normal within 40 minutes, preventing further delays and ensuring the well stayed on schedule.
Case 3: Powerframe Stud Loosening Causing Fluid End Misalignment
A remote onshore drilling rig operating a NATIONAL 14-P-220 pump reported fluid end misalignment and minor leaks after 180 hours of continuous operation. Inspection found that powerframe studs (TS-2408027) had loosened due to high vibration, leading to uneven pressure distribution. Technicians retorqued the studs to the recommended 2,000 ft-lbs and replaced three damaged studs with TSC OEM-equivalent units. The pump resumed smooth operation within 30 minutes, avoiding costly downtime and preventing further damage to the fluid end assembly.
6. Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts compatible with the NATIONAL 14-P-220 mud pump? | Yes, every part in this collection is exclusively engineered to be fully compatible with the NATIONAL 14-P-220 mud pump. They match TSC OEM specifications for the 14-P-220 model, requiring no modifications for installation. Each part works seamlessly with the fluid end assembly of the 14-P-220, simplifying inventory management and ensuring hassle-free repairs in deep drilling environments. |
| Do these parts meet API 7K and TSC OEM standards? | Absolutely. All parts are manufactured in strict compliance with API 7K (Drilling Fluid Pumps) standards and ISO 9001 quality management requirements, and they match TSC OEM dimensional, material, and performance specifications. Each part undergoes rigorous testing—including pressure, torque, and dimensional checks—to ensure reliability in harsh deep drilling environments up to 10,000 PSI. |
| What is the typical service life of key fluid end components for NATIONAL 14-P-220? | Under standard deep drilling conditions, seals last 300–500 operating hours; studs and nuts last 2,500–3,000 operating hours; valve guide inserts last 1,200–1,600 operating hours; liner clamps last 1,800+ operating hours. These parts outperform generic alternatives by 25% on average, even in harsh conditions, helping reduce maintenance frequency and costs for high-pressure well operations. |
7. Procurement Guidance
This TSC NATIONAL 14-P-220 Pump Fluid End Parts List is a formal, standardized procurement reference and technical compliance document, designed specifically for drilling teams and parts suppliers seeking reliable, API 7K-certified TSC OEM-equivalent replacement components for NATIONAL 14-P-220 mud pumps. Every part is fully vetted for dimensional accuracy, material quality, and functional performance—critical for 2,200 HP pumps operating at up to 10,000 PSI—eliminating the risk of sourcing incompatible, low-quality parts that lead to costly rig downtime, premature fluid end failure, and catastrophic pump damage. These issues can cost thousands in lost productivity and repairs, making certified parts a smart investment for any operation relying on NATIONAL 14-P-220 pumps.
