Product Introduction
This curated assortment covers all mission-critical wear, sealing, and structural components for the NOV 165T-5M triplex plunger pump, split into two core categories: plunger assembly kits (including carbide plungers, stainless intermediate rods, wiper oil seals, and retainer rings) and fluid end components (including cylinder covers, 2” Kelver packing, glands, followers, stuffing box seals, spherical suction/discharge valves, and valve cage retainers). All parts undergo factory high-pressure testing validated for the pump’s rated operating pressure, with full material traceability and compliance with API 674 standards. The lineup features wear-resistant carbide plungers, corrosion-resistant stainless steel rods, high-pressure elastomer seals, and precision-machined fluid end hardware, fully mapped to original 165T-5M part numbers for simplified inventory management and emergency field repairs.
Functional Performance Specifications
These 165T-5M plunger pump spare parts deliver industry-leading oilfield reliability: OEM carbide plungers provide 25,000+ operating hours of wear resistance under high-pressure cycling, reducing plunger replacement frequency by 45%; high-pressure Kelver packing and stuffing box seals achieve 99.8% leak-free performance, eliminating fluid loss and maintaining consistent pump pressure; spherical suction and discharge valves ensure unobstructed fluid flow with zero backflow, boosting pumping efficiency by 30%; stainless steel intermediate rods resist corrosion and fatigue, and precision retainer rings lock components in place to prevent misalignment-related failures.
Structural & Material Features
- Premium Wear-Resistant Materials: Plungers use solid carbide construction for exceptional abrasion resistance, while intermediate rods use 316 stainless steel to withstand corrosive drilling fluids and extend service life.
- High-Pressure Sealing Design: Multi-stage packing sets and stuffing box seals use high-grade fluoroelastomer compounds, rated to withstand the 165T-5M pump’s full operating pressure and resist fluid degradation.
- Precision Machining Tolerances: Glands, followers, and valve components are manufactured to tight tolerances (±0.0002 inch), ensuring perfect alignment with the pump’s fluid end and plunger assembly.
- Modular Assembly Kits: Pre-matched plunger and packing kits streamline pump overhauls, cutting maintenance downtime by 60% during critical high-pressure repairs.
- Reinforced Valve Components: Spherical valves and valve cage retainers feature heavy-duty construction to absorb pressure shocks and prevent valve failure during continuous pumping.
Applicable Operating Conditions
These spare parts are built for harsh onshore and offshore oilfield environments, optimized for the NOV 165T-5M triplex plunger pump used in drilling fluid circulation, well pressure testing, cementing, and high-pressure fluid transfer operations. They perform reliably in ambient temperatures ranging from -20°F to 150°F, resist exposure to abrasive drilling mud, corrosive well fluids, and heavy pump vibration, and comply with API 674 safety standards for high-pressure industrial plunger pumps.
Maintenance & Service Recommendations
- Inspect plunger packing, wiper seals, and stuffing box seals every 3 months for wear, swelling, or leakage; replace degraded components immediately to maintain high-pressure sealing and prevent fluid loss.
- Check carbide plungers for scoring or wear semi-annually; replace worn plungers to avoid seal damage and maintain consistent pumping performance.
- Inspect spherical suction and discharge valves quarterly for erosion or blockage; clean valve seats and replace faulty valves to ensure unobstructed fluid flow.
- Lubricate plunger assemblies per OEM specifications every 5,000 operating hours, and inspect retainer rings for loosening to prevent component misalignment.
- Retorque fluid end fasteners and cylinder covers to OEM torque specifications every 8,000 operating hours, replacing damaged hardware to prevent pressure leaks.
- Stock high-wear consumables (packing sets, seals, plungers, valves) at recommended minimum levels to eliminate unplanned 165T-5M pump shutdowns.
- We supply the following spare parts:
| S # | INDEX No | PART NUMBER | DESCRIPTION |
| 1 | 30-78-237-F | 1713297 | WIPER OIL JM 16203 |
| 2 | 30-78-320-F | L340-188 | PLUNGER CARBIDE, SIZE 2″ THREADED |
| 3 | 30-78-321-F | 340-023 | ROD INTERMEDIATE STAINLESS, THREADED |
| 4 | 30-78-274-F | 342-958 | RING, RETAINER STUFFING BOX |
| 5 | 2410031345 | Packing Top Cylinder Cover | |
| 6 | 30-75-436-F | 1712033-14 | COVER CYLINDER TOP |
| 7 | 30-75-456-F | 171297314 | Cylinder Only, J-165-M14CF (Fluid End Assembly) |
| 8 | 30-78-269-F | 342-768 | 2″ KELVER PACKING |
| 9 | 30-78-270-F | L342-168 | 2″ GLAND |
| 10 | 30-78-271-F | L342-368 | 2″ FOLLOWER |
| 11 | 30-78-283-F | 2410031-342 | 2″ SEAL, STUFFING BOX |
| 12 | 30-78-349-F | 2410031-334 | SEAL, STUFFING BOX |
| 13 | 30-78-356-F | L342-908 | 2″ PLGR. X 2 3/4″ Bore Stuffing Box |
| 14 | 30-78-456-F | 1793020-25 | Valve Complete Spherical, Suction |
| 15 | 30-78-457-F | 1793022-25 | Valve Complete Spherical, Discharge |
| 16 | 30-78-257-F | 1713407-2 | RETAINER , VALVE CAGE |
| 17 | 30-78-259-F | 1713038 | SEAL, VALVE CAGE |
Field Failure Repair Case Studies
Case 1: Packing Seal Leakage & Pressure Loss
A 165T-5M plunger pump experienced severe high-pressure fluid leakage from worn 2” Kelver packing, causing a drop in pumping pressure. Installing OEM 342-768 packing sets and L342-168 glands eliminated leakage, restoring full pump pressure capacity.
Case 2: Carbide Plunger Wear & Seal Damage
Scored carbide plungers damaged surrounding seals, leading to consistent fluid loss and inefficient pumping. Replacing the OEM L340-188 carbide plungers and accompanying wiper seals resolved the issue, restoring smooth plunger operation.
Case 3: Spherical Discharge Valve Failure
A degraded spherical discharge valve caused fluid backflow, reducing pump output and disrupting drilling circulation. Swapping in the OEM 1793022-25 complete valve assembly eliminated backflow, restoring full pumping efficiency.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts exclusively compatible with the NOV 165T-5M plunger pump? | Yes, this catalog features OEM-matched parts engineered solely for the National Oilwell Varco 165T-5M triplex plunger pump, with direct drop-in fitment for all listed assemblies. |
| Do these plunger pump parts meet API 674 industry standards? | Absolutely, all components comply with API 674 plunger pump standards and are tested to handle the pump’s rated high-pressure operating conditions. |
| What size plungers and packing are included in this parts list? | This catalog includes 2” carbide plungers, 2” Kelver packing, and matching 2” stuffing box components, the standard size for the 165T-5M pump fluid end. |
Procurement Guidance
This NOV 165T-5M triplex plunger pump spare parts catalog serves as both a formal oilfield procurement benchmark and a hands-on technical troubleshooting reference, designed to eliminate the risks of substandard aftermarket parts that fail prematurely under high pressure, reduce long-term pump maintenance expenses, and uphold the safety and operational reliability of your fluid handling system. Every part is a verified OEM-certified component that guarantees perfect fitment, consistent high-pressure performance, and full adherence to API and global oilfield standards, making it the definitive resource for maintaining 165T-5M plunger pumps.
