Product Introduction
We supply a comprehensive range of high-quality Novatech pump components for all Gardner Denver duplex, triplex drilling and well service pumps, including complete valve assemblies, precision-lapped valve seats, heavy-duty fatigue-resistant valve springs, wear-resistant valve inserts, positioning valve cages, and dedicated specialized valve pullers. The product line covers standardized ND series, NF series, 5710 series, 19000 series and 1235 series OEM-matched part numbers, designed for direct drop-in installation. Each component is processed via precision CNC machining, undergoes 100% high-pressure hydraulic performance testing and wear resistance verification, and is fabricated from oilfield-grade anti-abrasion, anti-corrosion and anti-fatigue materials. No on-site modification, grinding or secondary processing is required, making these parts suitable for routine daily maintenance, scheduled preventive replacement, local component repair and full fluid end overhaul projects.
Core Functional Specifications
Every Novatech Gardner Denver pump valve component delivers consistent, field-proven performance under harsh operating conditions, with verified authoritative engineering indicators:
- High-Pressure Sealing & Pressure Retention: Precision-matched valve and seat pairs achieve zero-leakage sealing at rated working pressures up to 7500 PSI (51.7MPa), completely eliminating mud backflow and pressure instability during drilling and well service operations.
- Stable Reciprocating Actuation: High-fatigue valve springs ensure smooth, consistent valve opening and closing at 60-105 strokes per minute (SPM), with no sticking, jamming or delayed action.
- Extreme Abrasion Resistance: Hardened alloy sealing surfaces resist long-term scouring from sand-heavy, high-solid-content drilling mud, significantly slowing component wear and extending service intervals.
- Full Series Compatibility: Customized structural designs fit all Gardner Denver duplex, triplex drilling and well service pumps, adapting to various plunger sizes and medium/high/high-pressure fluid ends.
- Quick Field Serviceability: Custom-designed dedicated valve pullers streamline component disassembly and installation, drastically reducing labor time and pump downtime during emergency repairs.
Structural Characteristics
Our Novatech Gardner Denver pump valve components feature a field-optimized, durable structure designed for long-term heavy-duty operation and simplified maintenance:
- Multi-Pump Compatibility: Perfectly fits all Gardner Denver duplex, triplex drilling and well service pumps, matching all factory plunger sizes and pressure-grade fluid ends.
- Integral Sealing Design: One-piece molded valve inserts and precision-finished valve seats form a tight, consistent sealing pair, with no gap leakage under sustained high pressure.
- Reinforced Load-Bearing Construction: Thickened, stress-relieved critical components resist hydraulic shock and prolonged mechanical vibration without cracking or deformation.
- Standard OEM Interface Dimensions: Direct drop-in replacement for original factory parts, simplifying inventory management and eliminating fitting errors.
- Premium Surface Hardening: Specialized heat treatment and surface hardening processes enhance impact and wear resistance on core sealing surfaces, prolonging overall part lifespan.
Maintenance & Care Recommendations
Follow these field-proven maintenance protocols to maximize component lifespan and pump operational stability:
- Daily Inspection: Check for external mud leakage around valve assemblies, monitor discharge pressure stability, and inspect for abnormal knocking noise or equipment vibration.
- Weekly Maintenance: Clear mud deposits and debris from valve seats and inserts, inspect spring tension and valve core vertical positioning.
- Monthly Wear Assessment: Measure valve-seat wear clearance, check inserts for cracks or edge chipping, and replace lightly worn components before sudden failure occurs.
- Scheduled Overhaul: Replace valve inserts, springs and worn seats every 3-4 months under heavy continuous use; inspect fluid end components annually for deformation or damage.
- Proper Storage: Store spare parts in a dry, dust-free, dark environment; coat metal components with anti-rust oil to prevent oxidation and corrosion during long-term storage.
We supply the following spare parts:
| KJ-KXJ-B, GN-CXO, GQ-GXO,GN-GXN, GQ-GXN, FK-FXK | ND-8-V21ND-8-V2HC2 | ND-8-S2 | 5710-32 | ND-8-PH | |
| EJ-EQ, EN-EQ, EN-EXQ, EJ-FXQ, EN-EN, EJ-EN, EJ-EXN, EN-EXN, FXDA, FZ-FXZ, FY-FXX, FY-FS, FY-FXD, FY-FXE, FXDA, FO-FXO-FO-2000, FO-FOX-A thru -K | ND-7-V21ND-7-V2HC2ND-7-V13 | ND-7-S5 | 5710-32 | ND-7-I | ND-7-PH |
| FXN, EK-EK, EK-EXK | ND-7-V21ND-7-V2HC2ND-7-V13 | ND-7-S1 | 5710-32 | ND-7-I | ND-7-PH |
| FXZ-FXZ-H, -J, FXO-FXO, -B, -L, -M | ND-5-V21 | ND-5-S5 | 5710-30 | ND-5-PH | |
| FD-FS, FD-FJ-A, FD-FJ-B, FD-FXD , FD-FXE, FC-FXE, FC-FS, EF-FS, EF-2000, FD-FXX, FG-FXG,-P,-R,-T, FG-AG, FG-AG-B, FG-AG-D, FG-2000, FG-4000, FG-FXG, FG-FXG-A thru-L, FD-FXX-J | NF-4-V54 | NF-4-S8 | 5710-03 | NF-4-I | ND-4-PH |
| EF-FXD, EF-PXD, FC-FXD-A thru -L, FC-FXD, FC-FXO, EW, EW-1000, FJ-FS, EW-FJ, FJ-FJ, EW-PXD, EF,ET, ET-PXD, FA-FXX, FC-FXX-A thru -M, -V, FC-FXX-S, EF-FXX-A S thru -D | NF-4-V74 | NF-4-S2 | 5710-03 | NF-4-IA | ND-4-PH |
| FC-FXD-R thru -Z, FC-FXX-Z, FC-FXX-AA thru -AG | NF-4-V74 | NF-4-S12 | 5710-03 | NF-4-IA | ND-4-PH |
| LF-5, FF-AF, FF-AXF, FF-2000, FF-4000, FF-FXF,-A thru -E,-M | NF-3-V64 | NF-3-S6 | 5710-03 | NF-3-IA | |
| LF-5, FF-AF, FF-AXF, FF-2000, FF-4000, FF-FXF, -A thru -E, -M | NF-3-V64 | NF-3-S6 | 5710-03 | NF-3-IA |
| Gardner Denver (Triplex Drilling Pump) |
| PZ-2400 | ND-8-V21ND-8-V2H2 | ND-8-S2 | 5710-115L | ND-8-PH | ||
| PZ-L(11) -A thru -F, PZ-K(10), PZ-J(9) -C , -D, PZ-H(8)-E, VE, PZ-G(7)-A, -B | ND-7-V21ND-7-V2HC2ND-7-V13 | ND-7-S1 | 5710-115L | ND-7-I | ND-7-PH | |
| PXL, PZ-L(11), PZ-K(10) with 7500 psi. Fluid End API 6 Valves & Seats | ND-6-V21ND-6-V2HC2ND-6-V13 | ND-6-S6 | 5710-115 | ND-6-I | ND-6-PH | |
| PZ-9-A, -B, PV-9, PZ-8-A, -B, -D, PO-7, PY-7-A, -C, -E, -G | ND-5-V21 | ND-5-S1 | 5710-30 | ND-5-PH | ||
| PJ-8A, -B, PJHB, PAJAA, -D, -E, -F, -J, -K, PAH-BFB, -BFC, PAHBF, TGT, TGH | ND-4-V14 | NF-4-S5 | 5710-335710-78#* | NF-4-I | ND-4-PH |
| GD-3000HP Medium Pressure F.E. | NF-6-V14NF-6-V1-C5 | NF-6-S3 | NF-6-I | NF-6-PH | |||
| GD-3000HP | NF-6-V14 | NF-6-S3 | NF-6-I | NF-6-PH | |||
| Med-High Pressure F.E. | NF-6-V1-C5 | ||||||
| GD-3000HP | NF-5-V14 | NF-5-S1 | NF-5-I | ND-5-PH | |||
| High Pressure F.E. | NF-5-V1-C5 | ||||||
| C-2250, C-2500, | 33/4-4 | NF-4-V14 | NF-4-S1 | 19000-4 | NF-4-I | ND-4-PH | |
| C-2500HP, HD-2250, | NF-4-V1-C5 | NF-4-S1 | 19000-4 | ND-4-PH | |||
| GD-2000, GD-2250, | 41/2-5 | NF-5-V14 | NF-5-S1 | 19000-2 | NF-5-I | ND-5-PH | |
| GD-2500, GD-2500HP | NF-5-V1-C5 | NF-5-S1 | 19000-2 | ND-5-PH | |||
| 51/2-6 | NF-6-V14 | NF-6-S3 | 19000-1 | NF-6-I | NF-6-PH | ||
| NF-6-V1-C5 | NF-6-S3 | 19000-1 | NF-6-PH | ||||
| 6/2-6/ | NF-7-V14 | NF-7-S1 | 1235-140 | NF-7-I | NF-7-PH | ||
| GWS, GD 1250, | 5-5/ | NF-5-V14 | NF-5D-S1 | NF-5-I | ND-5-PH | ||
| GWS 2250 | NF-5-V1-C5 | ||||||
| GD-1000 Warthog, | 3/-4 | NF-4-V14 | NF-4-S1 | 19000-4 | NF-4-I | ND-4-PH | |
| GD-1000HP | NF-4-V1-C5 | NF-4-S1 | 19000-4 | ND-4-PH | |||
| 4/-5 | NF-5-V14 | NF-5-S1 | 19000-2 | NF-5-I | ND-5-PH | ||
| NF-5-V1-C5 | NF-5-S1 | 19000-2 | ND-5-PH | ||||
| 5/-6 | NF-6-V14 | NF-6-S3 | 19000-1 | NF-6-I | NF-6-PH | ||
| NF-6-V1-C5 | NF-6-S3 | 19000-1 | NF-6-PH | ||||
| Compact 600HP, | 2/-3 | NF-2-V14 | NF-2-S1 | 1235-141 | NF-2-I | ||
| OPI 600, -600HP | 3/-4 | NF-4-V24 | NF-4-S2 | 19000-4 | NF-4-IA | ND-4-PH | |
| 4/-5 | NF-5-V14 | NF-5-S2 | 19000-3 | NF-5-I | ND-5-PH | ||
| NF-5-V1-C5 | NF-5-S2 | 19000-3 | ND-5-PH | ||||
| PA-8C, -D, -E | NF-4-V74 | NF-4-S2 | 5710-17 | NF-4-IA | ND-4-PH | ||
| PA-8H, -K, -L, -Q, PA-8R, | NF-4-V74 | NF-4-S12 | 5710-17 | NF-4-IA | ND-4-PH | ||
| -S,-U, -Y | |||||||
| PA-8N, TEEA-D, | NF-2-V14 | NF-2-S2 | 5710-03 | NF-2-I | NF-2-C1 | ||
| PAHAA (Plunger Model), | |||||||
| PAHAF (Plunger Model), | |||||||
| PE-5C, -E, -J, -U, | |||||||
| TEE-BAA | |||||||
| PE-5T,-Z, TEEBFB, | |||||||
| TEEBFC, TEED-D, | |||||||
| TEEE-D, TEEB-D, TGE | |||||||
| 2 Inch Seat ID | NF-2-V14 | NF-2-S5 | 5710-03 | NF-2-I | NF-2-C1 | ||
| PE-5T, -Z, TEEBFB, | |||||||
| TEEBFC, TEED-D, | |||||||
| TEEE-D, TEEB-D, TGE | |||||||
| 2.375 Inch Seat ID | NF-2-V36 | NF-2-S9# | 5710-03 | NF-2-IA | NF-2-C1 | ||
| PE-5F, -G, -H, -K, -L, Q, | NF-1A-V16 | NF-1A-S1 | 5710-03 | NF-1A-I | NF-1A-C1 | ||
| PE-5R, -T, -V, -W, -X, | |||||||
| PE-5Y, -Z, -AA, -AB, | |||||||
| TEEBCA,-BGB,-BFA |
Field Fault Repair Cases
Case 1: High Pressure Loss Caused by Worn Valve Seat
A Gardner Denver PZ-2400 triplex drilling pump experienced sudden pressure drops and audible backflow during deep well operations, failing to maintain rated 7500 PSI working pressure. Field inspection revealed severe wear on the valve seat sealing surface from prolonged high-pressure mud erosion. Maintenance teams replaced the matching ND-8-S2 valve seat, and the pump quickly restored full pressure stability, eliminating mud backflow and resuming normal operation.
Case 2: Valve Sticking Due to Fatigued Valve Spring
A Gardner Denver GD-3000HP well service pump showed unstable fluid flow and intermittent pressure fluctuations, with valves failing to fully open and close smoothly. The root cause was spring fatigue and elasticity loss after long-term high-cycle operation. Replacing the OEM-matched NF-6-S3 valve spring and adjusting assembly clearance resolved the sticking issue, returning the pump to consistent, smooth performance.
Case 3: Sealing Leakage from Damaged Valve Insert
A Gardner Denver PA-8C duplex pump developed persistent minor mud leakage at the valve assembly, gradually reducing overall pumping efficiency. The valve insert had cracked under repeated hydraulic shock, losing full sealing integrity. Technicians replaced the dedicated NF-4-IA valve insert, thoroughly cleaned the sealing surface, and fully resolved the leakage fault without additional adjustments.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these parts fully interchangeable with original Gardner Denver pump components? | Yes, all Novatech valve parts are machined to exact OEM dimensional and performance standards, offering 100% direct drop-in replacement for original factory parts across all Gardner Denver duplex, triplex drilling and well service pump models. |
| How do I select parts for medium vs high-pressure Gardner Denver fluid ends? | Confirm your pump model, fluid end pressure rating (medium/high/ultra-high) and plunger size, then match to the corresponding ND/NF series valve, seat and spring part numbers for perfect fitment and pressure compliance. |
| What is the typical service life of these valve components? | Under standard abrasive drilling mud conditions, valve seats and inserts last 1000-1500 operating hours; springs are rated for over 140,000 continuous cycles, 40% longer than generic aftermarket replacement parts. |
Procurement Guidance
This Novatech Gardner Denver pump valve and component guide serves as a reliable, dual-purpose resource for structured spare parts procurement and on-site technical troubleshooting. Every part we supply undergoes strict dimensional verification, high-pressure performance testing and wear resistance validation, fully complying with API 7K/API 6 industry standards and OEM quality benchmarks. Using these model-matched, high-quality components eliminates common operational failures caused by ill-fitting, low-grade parts—including high-pressure leakage, mud backflow, valve sticking and premature wear—directly reducing pump downtime, long-term maintenance costs and unplanned operational disruptions.
