Product Introduction
This comprehensive product line covers all specialized valves, valve seats, valve springs, valve inserts, valve cages and dedicated valve pullers for Novatch SPM pumps and Southwest Fluid Ends, including complete ND series, NF series, 1235 series, 19000 series and 5710 series matching parts corresponding to each pump model and plunger size. Each component is processed via precision CNC machining, undergoes 100% ultra-high-pressure hydraulic testing and wear resistance testing, and is fabricated from industrial-grade high-pressure-resistant, wear-resistant and corrosion-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 ultra-high-pressure harsh pumping conditions, with verified authoritative performance indicators:
- Ultra-High-Pressure Sealing & Pressure Retention: Precision-mated valve and seat assemblies achieve zero-leakage sealing under a rated working pressure of up to 7500 psi (51.7MPa), completely eliminating medium backflow and pressure instability.
- Stable High-Frequency Action: High-fatigue valve springs ensure smooth, consistent opening and closing of valves under 60-100 strokes per minute (SPM) continuous operation, with no jamming or delayed action.
- Extreme Abrasion & Erosion Resistance: High-hardness alloy contact surfaces resist long-term scouring of sand-containing, high-solid-content and corrosive pumping media, slowing down component wear and tear.
- Precision Positioning Guidance: Standard structural design provides 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.
Applicable Working Conditions
All Novatch SPM pump and Southwest Fluid End valve parts adapt to a full range of harsh high-pressure pumping scenarios:
- Ultra-High-Pressure Operations: Oilfield drilling, well cementing, fracturing, and industrial high-pressure fluid conveying, supporting up to 7500 psi ultra-high-pressure operation.
- High-Abrasion Medium Environment: Suitable for sand-containing, high-solid-content, slightly corrosive drilling mud and industrial high-pressure fluids.
- Heavy-Load Continuous Operation: 24-hour uninterrupted high-pressure pumping, resisting frequent hydraulic impact and high-frequency mechanical vibration.
- Harsh Outdoor & Industrial Environments: Desert, mountain, offshore and industrial operation sites, adapting to ambient temperatures ranging from -40℃ to 80℃.
Maintenance and Upkeep Suggestions
To ensure stable valve performance and prolong service life under high-pressure conditions, follow these field-proven maintenance protocols:
- Daily Inspection: Check valve assembly for high-pressure fluid leakage, monitor pump discharge pressure stability, and check for abnormal impact noise.
- Weekly Maintenance: Clean medium 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 2-3 months under high-load operation, inspect valve assembly deformation annually.
- 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:
| Duplex Pump “IVP” Fluid End | ND-7-V21ND-7-V2HC2ND-7-V13 | ND-7-S1 | 5710-32 | ND-7-I | ND-7-PH | |
| Triplex Pump 7500 psi Fluid End | ND-6-V21ND-6-V2HC2ND-6-V13 | ND-6-S4 | 5710-115 | ND-6-I | ND-6-PH |
| SPM |
| THB175, -225, -350, TBH550, TWS250, TWS400, TWS500LW, TWS600, TWS600S | 13/4-33V2-4V2 | NF-2-V14NF-4-V24 | NF-2-S1NF-4-S2 | 1235-14119000-4 | NF-2-INF-4-IA | ND-4-PH |
| TWS900, QWS1000S | 3V2-4 | NF-4-V14 | NF-4-S1 | 19000-4 | NF-4-I | ND-4-PH |
| 3/-4 | NF-4-V1-C5 | |||||
| 4V2-5 | NF-5-V14 | NF-5-S1 | 19000-2 | NF-5-I | ND-5-PH | |
| NF-5-V1-C5 | NF-6-PH | |||||
| 51/2-6 | NF-6-V14 | NF-6-S3 | 19000-1 | NF-6-I | ||
| NF-6-V1-C5 | ||||||
| TWS1300, TWS1600, | 3/-4 | NF-4-V14 | NF-4-S1 | 19000-4 | NF-4-I | ND-4-PH |
| TWS1800, TWS1600LW, | NF-4-V1-C5 | |||||
| TWS2250, QWS2000, | 4/-5 | NF-5-V14 | NF-5-S1 | 19000-2 | NF-5-I | ND-5-PH |
| 2500LW, QWS2500, | NF-5-V1-C5 | |||||
| 2500SD, QWS3500, | 5/-6 | NF-6-V14 | NF-6-S3 | 19000-1 | NF-6-I | NF-6-PH |
| TBH1050, QBH1575 | NF-6-V1-C5 | |||||
| 6/2-6/ | NF-7-V14 | NF-7-S1 | 1235-140 | NF-7-I | NF-7-PH |
On-site Fault Repair Cases
Case 1: 7500 PSI Pressure Loss Caused by Worn Valve Seat
The Southwest 7500 psi triplex pump fluid end experienced a sudden drop in discharge pressure and obvious backflow noise, failing to maintain rated ultra-high pressure. The valve seat sealing surface was severely worn by long-term high-pressure medium scouring, resulting in poor sealing fit. Maintenance staff replaced the matching ND-6-S4 valve seat and corresponding ND-6-I valve insert, and the pump quickly resumed normal ultra-high-pressure output.
Case 2: Valve Jamming Due to Fatigued Valve Spring
The SPM TWS1600 pump valve failed to open and close smoothly, causing unstable fluid flow and intermittent pressure fluctuations. The valve spring fatigued and lost elasticity after long-term high-cycle ultra-high-pressure operation, leading to abnormal valve action. Workers replaced the matching NF-5-S1 spring, adjusted the assembly clearance, and restored stable valve operation.
Case 3: High-Pressure Leakage Due to Damaged Valve Insert
Minor but continuous high-pressure fluid leakage occurred at the SPM TWS900 pump valve assembly, gradually reducing pumping efficiency. The valve insert cracked and deformed under ultra-high hydraulic impact, losing its sealing performance. Technicians replaced the dedicated NF-4-I valve insert, cleaned the sealing surface thoroughly, and completely eliminated the leakage fault.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these valves and parts fully interchangeable with original Novatch SPM pumps & Southwest Fluid Ends? | 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 models. |
| How to select the correct valve part number for my SPM pump? | First confirm your pump model, plunger size and rated working pressure, then match the corresponding ND/NF series valve part number listed in this catalog for a perfect, pressure-grade fit. |
| What is the pressure rating of these valve assemblies? | These valve parts support a rated working pressure up to 7500 psi (51.7MPa), fully meeting the ultra-high-pressure operation requirements of SPM pumps and Southwest triplex fluid ends. |
Procurement Guidance
This Novatch SPM Pump & Southwest Fluid End valve and matching parts catalog serves as a professional, reliable reference for high-pressure pump 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, ultra-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.
