1. Detailed Product Introduction
All parts are direct TSC OEM equivalents, meaning they fit perfectly with existing National 12-P-160 fluid end assemblies—no field machining, drilling, or modification is needed, saving maintenance teams 2–3 hours of installation time per repair. Each component is crafted from field-proven, high-performance materials to eliminate common fluid end failure points: studs and nuts are made from heat-treated alloy steelfor superior tensile strength; gaskets and seals are constructed from nitrile rubber with a reinforced steel core to resist high pressure and drilling mud contamination; valve guides and bushings feature a hardened surface treatmentto reduce wear and extend service life; liner retainer components are precision-machined from high-carbon steel to ensure a tight, leak-free fit with pump liners.
2. Core Functional Specifications
The fluid end is the heart of the SOUTHWEST NATIONAL 12-P-160 mud pump, and each component in this parts list plays a critical role in ensuring smooth, efficient operation. The complete fluid end module (TS-8476-4A) integrates all key components to provide a one-stop replacement solution for full fluid end overhauls, eliminating the need to source individual parts. Studded discharge modules (TS-FEM12PDISSWNS) and suction modules (TS-FEM12PSUCSWNS) manage the intake and discharge of drilling mud, maintaining consistent pressure (up to 7,500 PSI) and flow rates that align with the pump’s 1600 HP capacity.
3. Recommended Applicable Operating Conditions
These SOUTHWEST NATIONAL 12-P-160 fluid end parts are engineered to perform reliably across the harshest global drilling and well stimulation environments, aligned with the pump’s 1600 HP capacity and 12” stroke design. They are suitable for onshore oil & gas drilling rigs, offshore jack-up and semi-submersible rigs, horizontal drilling operations, deep well drilling, and hydraulic fracturing sites—all common applications for the National 12-P-160 pump.
4. Proactive Maintenance & Service Recommendations
To maximize the service life of SOUTHWEST NATIONAL 12-P-160 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 pump’s operational requirements:
Clean liner retainer components (TS-12PLASW, TS-PP6021260SW) every 1,000 operating hours to remove mud buildup, which can cause misalignment and wear. Use only API-certified lubricants for valve guides and bushings to reduce friction and extend service life. Always cross-verify part numbers prior to installation to ensure full compatibility with National 12-P-160 fluid ends, and avoid mixing OEM and non-OEM parts, which can cause misalignment and premature failure. Store spare parts in a clean, dry environment to prevent corrosion and damage, especially critical for components like discharge adapters (TS-NAT12PDSMA) and connectors (TS-NAT12PDSMC) that are exposed to harsh elements.
We supply the following spare parts:
| ITEM | PART NUMBER | DESCRIPTION |
| TS-8476-4A | FLUID END MODULE COMPLETE ASSEMBLY | |
| 1 | TS-FEM12PDISSWNS | STUDDED FLUID END DISCHARGE (INCLUDE 2-8) |
| 2 | TS-12PDISSWNS | DISCHARGE MODULE ONLY |
| 3 | TS-12P160PFS | STUD, POWER FRAME |
| 4 | TS-8P80TRSN | NUT, POWER FRAME STUD |
| 5 | TS-12P160DSUCS | STUD, DISCHARGE TO SUCTION MODULE |
| 6 | TS-PEP55 | NUT, DISCHARGE TO SUCTION STUD |
| 7 | TS-12PTRSSW | STUD, THREADED RING |
| 8 | TS-12P160TRSN | NUT, THREADED RING STUD |
| 9 | TS-FEM12PSUCSWNS | STUDDED FLUID END SUCTION (INCLUDE 10-12) |
| 10 | TS-12PSUCSWNS | SUCTION MODULE ONLY |
| 11 | TS-12PTRSSW | STUD, THREADED RING |
| 12 | TS-12P160TRSN | NUT, THREADED RING STUD |
| 13 | TS-12PCAPSW | CAP, THREADED (SCREW GLAND) |
| 14 | TS-12PFLGSW | RING, THREADED (THREADED FLANGE) |
| 15 | TS-12PVCSWNS | PLUG, VALVE COVER |
| 16 | TS-SW119 | SEAL, VALVE COVER PLUG – RUBBER |
| 17 | TS-12PVGASWNS | ASSEMBLY, VALVE GUIDE |
| 18 | TS-50C125KFCYB | SCREW, VALVE GUIDE |
| 19 | TS-PZ789VGI | BUSHING, VALVE GUIDE |
| 20 | TS-PEP70 | PIN, DOWELL |
| 21 | TS-1290344 | GASKET, WEAR PLATE AND MODULE |
| 22 | TS-PP6021260SW | PLATE, LINER WEAR |
| 23 | TS-12PLASW | FLANGE, LINER RETAINER (LINER BUSHING) |
| 24 | TS-PEP75 | CAPSCREW, LINER RETAINER FLANGE |
| 25 | TS-12PLANSW | NUT, LINER RETAINER |
| 26 | TS-2410031437 | SEAL, DISCHARGE ADAPTER |
| 27 | TS-NAT12PDSMA | ADAPTER, DISCHARGE |
| 28 | TS-2410031433 | SEAL, DISCHARGE CONNECTOR TO DISCHARGE ADAPTER |
| 29 | TS-NAT12PDSMC | CONNECTOR, DISCHARGE |
| 30 | TS-700030711 | CAPSCREW, DISCHARGE CONNECTOR (W/LOCKWASHER) |
| 31 | TS-1292175 | RING, BACKUP (DISCHARGE CONNECTOR) |
| 32 | TS-1540851 | GASKET,SUCTION MANIFOLD |
5. On-Site Field Failure Repair Cases
Case 1: Discharge Connector Seal Failure Causing Pressure Loss
An onshore drilling rig operating a SOUTHWEST NATIONAL 12-P-160 pump reported sudden pressure loss in the fluid end, halting drilling operations. Inspection revealed a worn discharge connector seal (TS-2410031433), which was leaking drilling mud and reducing system pressure below the pump’s rated 7,500 PSI. Technicians replaced the seal with an OEM-equivalent unit, torqued the discharge connector capscrews (TS-700030711) to specification, and pressure-tested the system. The pump was restored to full operational capacity within 1.5 hours, avoiding over $10,000 in downtime costs.
Case 2: Power Frame Stud Loosening Leading to Fluid End Misalignment
An offshore rig using a SOUTHWEST NATIONAL 12-P-160 pump experienced fluid end misalignment and abnormal vibration, which threatened to damage the pump’s power frame. Troubleshooting identified five loose power frame studs (TS-12P160PFS), which had failed to maintain proper torque (877–1754 ft-lbs) under continuous vibration. Technicians retorqued all 30 power frame studs to 1,272 ft-lbs, replaced two studs with stripped threads, and realigned the fluid end. The pump resumed normal operation within 2 hours, preventing further damage to the fluid end module (TS-8476-4A) and other critical pump components.
Case 3: Valve Guide Wear Causing Valve Malfunction
A remote drilling site reported erratic mud flow and increased noise from their SOUTHWEST NATIONAL 12-P-160 pump, which was impacting drilling efficiency. Inspection found excessive wear in the valve guide bushings (TS-PZ789VGI), which was causing valve misalignment and leakage. Technicians replaced the valve guide assembly (TS-12PVGASWNS) and bushings, adjusted valve clearances, and tested the pump. The pump’s flow rate and pressure returned to normal within 1 hour, avoiding costly damage to valve seats and preventing unplanned downtime.
6. Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts fully interchangeable with TSC OEM parts for the National 12-P-160 pump? | Yes, every part is precision-manufactured to match TSC OEM dimensions, material specs, and API 7K standards, making them direct drop-in replacements. They fit perfectly with SOUTHWEST NATIONAL 12-P-160 fluid ends, requiring no field modification or custom machining—saving maintenance teams time and reducing installation errors. |
| What is the typical service life of key fluid end components for the National 12-P-160? | Under standard drilling conditions (aligned with the National 12-P-160’s 1600 HP operation), gaskets and seals last 500–700 operating hours; studs and nuts last 3,000–3,500 operating hours; valve guides and bushings last 1,500–2,000 operating hours; liner retainer components last 2,500+ operating hours. Service life shortens in harsh conditions (high pressure, contaminated mud, saltwater). |
| Do these parts meet industry safety and performance standards for the National 12-P-160? | Absolutely. All parts comply with API 7K standards (the global benchmark for drilling fluid pumps) and ISO 9001 quality requirements. They undergo rigorous testing—including pressure testing (1.5x rated pressure), torque testing, and CNC dimensional inspection—to ensure they can handle the National 12-P-160’s 7,500 PSI pressure rating and 120 SPM operation, making them suitable for critical drilling operations. |
7. Procurement Guidance
This TSC Southwest New Style Module for National 12-P-160 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 the SOUTHWEST NATIONAL 12-P-160 mud pump. Every part is fully vetted for dimensional accuracy, material quality, and functional performance—critical for a 1600 HP pump operating at up to 7,500 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 the National 12-P-160.
