Product Introduction
This comprehensive product line covers all specialized valves, valve seats, valve springs, valve inserts, valve cages and dedicated valve pullers for Novatech Omega and OPI series mud pumps, including complete NF series, ND series, 1235 series, 19000 series and 5710 series matching parts corresponding to each pump model, horsepower rating and plunger size. Each component is processed via precision CNC machining, undergoes 100% high-pressure hydraulic testing and wear resistance testing, and is fabricated from oilfield-grade wear-resistant, corrosion-resistant and fatigue-resistant materials, requiring no on-site modification, grinding or secondary processing, suitable for daily routine maintenance, seasonal preventive replacement, local component repair and full fluid end overhaul.
Core Function Specifications
Every valve and matching component in this catalog is engineered to withstand extreme harsh oilfield drilling conditions, with verified authoritative performance indicators:
- High-Pressure Sealing & Pressure Retention: Precision-mated valve and seat assemblies achieve zero-leakage sealing under a rated working pressure of up to 52MPa, completely eliminating mud backflow and pressure instability.
- Stable High-Frequency Action: High-fatigue valve springs ensure smooth, consistent opening and closing of valves under 60-95 strokes per minute (SPM) continuous operation, with no jamming or delayed action.
- Abrasion & Erosion Resistance: High-hardness alloy contact surfaces resist long-term scouring of sand-containing, high-solid-content drilling mud, slowing down component wear and extending service life.
- Precision Positioning Guidance: Standard valve cage and structural design provide stable vertical positioning for valve cores, preventing offset and ensuring uniform stress distribution across sealing surfaces.
- Quick On-Site Maintenance: Custom dedicated valve pullers simplify disassembly and installation, greatly reducing the time required for on-site valve replacement and overhaul.
Structural Characteristics
These mud pump valve components feature optimized, field-friendly structures suitable for long-term durable operation and convenient maintenance:
- High-Horsepower Compatibility: Designed specifically for 350-2000HP Omega and OPI mud pumps, adapting to various plunger sizes and modular fluid end structures.
- Integral Sealing Design: One-piece molded valve inserts and precision-finished valve seats form a tight sealing pair, with no gap leakage under continuous high-pressure operation.
- Reinforced Spring Design: Heat-treated alloy springs with high fatigue resistance, maintaining stable elasticity even under long-term high-cycle operation.
- Standardized Interface Size: Unified installation dimensions realize full interchangeability with original OEM parts, simplifying spare parts stocking and management.
- Wear-Resistant Surface Treatment: Special heat treatment and surface hardening processes improve impact resistance and wear life of key contact parts.
Maintenance and Upkeep Suggestions
To ensure stable valve performance and prolong service life, follow these field-proven maintenance protocols:
- Daily Inspection: Check valve assembly for high-pressure mud leakage, monitor mud pump discharge pressure stability, and check for abnormal impact noise.
- Weekly Maintenance: Clean mud deposits and impurities from valve seats and inserts, inspect spring elasticity and valve core positioning.
- Monthly Inspection: Measure wear clearance between valves and seats, check insert cracking and seat surface wear, and replace slightly damaged components in advance.
- Regular Overhaul: Replace valve inserts, springs and worn seats every 3-4 months, inspect valve cage deformation annually, and clean fluid end mud passages.
- Storage Requirements: Store rubber and alloy components in a dry, dust-free, dark environment; apply anti-rust oil on metal surfaces to prevent oxidation and corrosion.
We supply the following spare parts:
| 1000-1300HP | 4-41/2 | NF-5-V14NF-5-V1-C5 | NF-5-S2 | 19000-3 | NF-5-I | ND-5-PH | |
| NF-6-V14 | NF-5-S3 | 19000-4 | NF-6-I | NF-6-PH | |||
| 5-71/2 | NF-6-V1-C5 | ||||||
| 1300HP “MF” F.E., | 33/4-4 | NF-4-V14 | NF-4-S1 | 19000-4 | NF-4-I | ND-4-PH | |
| 1800HP “MF” F.E. | 41/_5 | NF-4-V1-C5NF-5-V14NF-5-V1-C5 | NF-5-S1 | 19000-2 | NF-5-I | ND-5-PH | |
| 51/-6 | NF-6-V14NF-6-V1-C5 | NF-6-S3 | 19000-1 | NF-6-I | NF-6-PH | ||
| 6/-6/ | NF-7-V14 | NF-7-S1 | 1235-140 | NF-7-I | NF-7-PH | ||
| D-750 (Piston) | NF-6-V14NF-6-V1-C5 | NF-6-S3 | 19000-4 | NF-6-I | NF-6-PH | ||
| D-750L (Piston) | ND-6-V21ND-6-V2HC2ND-6-V13 | ND-6-S6 | 5710-115 | ND-6-I | ND-6-PH |
| 1000-1300WS | 4-4/ | NF-5-V14NF-5-V1-C5 | NF-5-S2 | 19000-3 | NF-5-I | ND-5-PH |
| 5-7/ | NF-6-V14NF-6-V1-C5 | NF-6-S3 | 19000-4 | NF-6-I | NF-6-PH | |
| 350 AWS, 500 AWS | 2/-3 | NF-2-V14 | NF-2-S1 | 1235-141 | NF-2-I | |
| 3/-4 | NF-4-V24 | NF-4-S2 | 19000-4 | NF-4-IA | ND-4-PH | |
| 41/_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 | |||
| 880 AWS | 3/-4 | NF-4-V14NF-4-V1-C5 | NF-4-S1 | 19000-4 | NF-4-I | ND-4-PH |
| 41/_5 | NF-5-V14NF-5-V1-C5 | NF-5-S1 | 19000-2 | NF-5-I | ND-5-PH | |
| 5/-6 | NF-6-V14NF-6-V1-C5 | NF-6-S3 | 19000-1 | NF-6-I | NF-6-PH | |
| 1000 AWS, 1300 AWS, | 3/-4 | NF-4-V16 | NF-4-S1 | 19000-4 | NF-4-I | ND-4-PH |
| 1600 AWS, 1800 AWS, | NF-4-V1-C7 | |||||
| 1600 BWS, GD-2000 | 41/_5 | NF-5-V16NF-5-V1-C7 | NF-5-S1 | 19000-2 | NF-5-I | ND-5-PH |
| 5/-6 | NF-6-V16NF-6-V1-C7 | NF-6-S3 | 19000-1 | NF-6-I | NF-6-PH | |
| 6/-6/ | NF-7-V16 | NF-7-S1 | 1235-140 | NF-7-I | NF-7-PH | |
| 700D (Piston) | NF-6-V14NF-6-V1-C5 | NF-6-S3 | 19000-4 | NF-6-I | NF-6-PH | |
| 350D, 350DG | ND-4-V14 | ND-4-S2 | 5710-33 | NF-4-I | ND-4-PH | |
| 350 DWS | NF-5-V14NF-5-V1-C5 | NF-5-S2 | 19000-3 | NF-5-I | ND-5-PH | |
| 500DC, 600D, 700DL, | ND-6-V21 | ND-6-S6 | 5710-115 | ND-6-I | ND-6-PH | |
| 700 HDL | ND-6-V2HC2ND-6-V13 | |||||
| 1000 HDL, 1300 HDL | ND-7-V21ND-7-V2HC2ND-7-V13 | ND-7-S1 | 5710-115L | ND-7-I | ND-7-PH |
On-site Fault Repair Cases
Case 1: Pressure Loss Caused by Worn Valve Seat
The Omega 1300HP mud pump experienced a sudden drop in discharge pressure and obvious backflow noise, failing to maintain normal working pressure. The valve seat sealing surface was severely worn by long-term mud scouring, resulting in poor sealing fit. Maintenance staff replaced the matching NF-5-S2 valve seat and corresponding NF-5-I valve insert, and the pump quickly resumed stable pressure output.
Case 2: Valve Jamming Due to Fatigued Valve Spring
The OPI 1000 AWS mud pump valve failed to open and close smoothly, causing unstable mud flow and intermittent pressure fluctuations. The valve spring fatigued and lost elasticity after long-term high-cycle operation, leading to abnormal valve action. Workers replaced the matching ND-6-S6 spring, adjusted the assembly clearance, and restored smooth valve operation.
Case 3: High-Pressure Leakage Due to Damaged Valve Insert
Continuous minor mud leakage occurred at the OPI 350D mud pump valve assembly, gradually reducing pumping efficiency. The valve insert cracked under continuous hydraulic impact, losing its sealing performance. Technicians replaced the dedicated NF-4-I valve insert, thoroughly cleaned the sealing surface, and completely eliminated the leakage fault.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these valves & parts fully interchangeable with original Novatech Omega & OPI mud pumps? | Yes, all parts in this catalog are precision-designed to match OEM dimensional and performance standards, achieving 100% direct interchangeability with original valves, seats, springs and accessories for all listed Omega and OPI pump models. |
| How to select the correct valve part number for my Omega mud pump? | First confirm your pump horsepower, exact model and plunger size, then match the corresponding NF/ND series valve part number listed in this catalog for a perfect, hassle-free fit. |
| What is the typical service life of these valve components? | Under conventional abrasive mud drilling conditions, valve seats and inserts last 850-1350 working hours; springs withstand over 125,000 continuous cycles, 30% longer than standard aftermarket replacement parts. |
Procurement Guidance
This Novatech Omega & OPI series mud pump valve and matching parts catalog serves as a professional, reliable reference for oilfield equipment maintenance and spare parts procurement teams, providing clear, accurate model matching and procurement standards for daily replacement, preventive maintenance and full fluid end overhaul. All supplied parts undergo strict dimensional verification, high-pressure hydraulic testing and wear resistance testing, fully complying with API 7K industry standards and original equipment quality requirements, with ultra-high sealing performance, wear resistance and operational stability.
