Product Introduction
This comprehensive product line covers all specialized valves, valve seats, valve springs, valve inserts, valve cages and dedicated valve pullers for Oilwell series mud pumps, including complete ND series, NF series, 5710 series, 19000 series and 1235 series matching parts corresponding to each pump model, plunger size and suction/discharge application. 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 55MPa, 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.
- Suction & Discharge Dual Adaptation: Customized valve structures fit both suction and discharge ends of Oilwell mud pumps, maintaining stable performance under different pressure environments.
- 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 Oilwell mud pump valve components feature optimized, field-friendly structures suitable for long-term durable operation and convenient maintenance:
- Full Model Compatibility: Designed to fit all conventional and PT-series Oilwell 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 Stress-Resistant Structure: Key stress-bearing parts are thickened and reinforced, resisting instantaneous hydraulic impact and long-term mechanical vibration.
- 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 under heavy-load conditions, follow these field-proven maintenance protocols:
- Daily Inspection: Check valve assembly for high-pressure mud leakage, monitor mud pump discharge pressure stability, and listen 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 assembly 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:
| 1700-P, 1400-P | ND-8-V21ND-8-V2HC2 | ND-8-S2 | 5710-32 | ND-8-PH | |
| 510-P, 6-P-LD | NF-3-V44 | NF-3-S3 | 5710-32 | NF-3-I | |
| 6-P, 6-P-HD | NF-2-V34 | NF-25-10 | 5710-03 | NF-2-IA | |
| 1400-PT, 1700-PT, A1400-PT, A1700-PT, 1100-PT, 850-PT, A1100-PT, A850-PT, HD1700PT | ND-7-V21ND-7-V2HC2ND-7-V13 | ND-7-S1 | 5710-115L | ND-7-I | ND-7-PH |
| A600PT, A560-PT, 350-PT | ND-6-V21ND-6-V2HC2ND-6-V13 | ND-6-S6 | 5710-115 | ND-6-I | ND-6-PH |
| 46P, 346P, 326P | NF-3-V34 | NF-34-S3 | 5710-03 | NF-3-I | |
| SA-625-5, SA-626-5, SA-630-5, SA-634-5 | NF-2-V14 | NF-2-S1 | NF-2-I | ||
| SA-640-5, SA-650 | NF-4-V24 | NF-4-S2 | 5710-38 | NF-4-IA | ND-4-PH |
| SB-644-5, SA-644-5, SA-644-10, SA-650-5, SA-650-10, SB-650-5 | NF-5-V14NF-5-V1-C5 | NF-5-S2 | 19000-3 | NF-5-I | ND-5-PH |
| S-610Discharge | NF-3-V34 | NF-3-S4 | NF-3-I | ||
| S-610Suction | NF-4-V34 | NF-4-S4 | NF-4-I | ||
| Super 48, S284, SA824, S856-6, SA-656-6 | NF-7-V14 | NF-7-S1 | 5710-115L | NF-7-I | NF-7-PH |
| 48-P-HD, 58-P-D | NF-4-V24 | NF-4-S13A | 5710-03 | NF-4-IA | ND-4-PH |
| S-830, SA-830 | NF-4-V24 | NF-4-S13A | 1235-137* | NF-4-IA | ND-4-PH |
On-site Fault Repair Cases
Case 1: Pressure Loss Caused by Worn Valve Seat
The Oilwell 1700-PT mud pump experienced a sudden drop in discharge pressure and obvious backflow noise, failing to maintain rated working pressure. The valve seat sealing surface was severely worn by long-term high-pressure mud scouring, resulting in poor sealing fit. Maintenance staff replaced the matching ND-7-S1 valve seat and corresponding ND-7-I valve insert, and the pump quickly resumed stable high-pressure output.
Case 2: Valve Jamming Due to Fatigued Valve Spring
The Oilwell SA-650 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 NF-5-S2 spring, adjusted the assembly clearance, and restored smooth, consistent valve operation.
Case 3: High-Pressure Leakage Due to Damaged Valve Insert
Continuous minor mud leakage occurred at the Oilwell S-610 discharge valve assembly, gradually reducing pumping efficiency. The valve insert cracked under continuous hydraulic impact, losing its sealing performance. Technicians replaced the dedicated NF-3-I valve insert, thoroughly cleaned the sealing surface, and completely eliminated the leakage fault.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these valves and parts fully interchangeable with original Oilwell 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 Oilwell mud pump models. |
| How to select the correct valve part for suction vs. discharge ends? | Refer to the catalog to match dedicated suction or discharge valve part numbers corresponding to your Oilwell pump model; suction and discharge valves have targeted structural designs for optimal performance. |
| What is the service life of these Oilwell valve components? | Under conventional abrasive mud drilling conditions, valve seats and inserts last 900-1400 working hours; springs withstand over 130,000 continuous cycles, 35% longer than standard aftermarket replacement parts. |
Procurement Guidance
This Novatech Oilwell 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.
