Bomba de Reemplazo Durco Mark III — Flowserve ANSI B73.1 100% Intercambiable
ANSI B73.1 Process Pump Replacement
Bomba de Reemplazo Durco Mark III — Flowserve ANSI B73.1 100% Intercambiable
nnn
Reverse vane impeller. Drop-in replacement. Save 20–40% vs Flowserve OEM with 6–10 week delivery.
Why Switch from OEM Durco Mark III?
The D Mark III delivers identical hydraulic performance with the same reverse vane impeller design — at 30–50% faster delivery.
| Feature | Durco Mark III (Flowserve OEM) | D Mark III (Yingsiman) |
|---|---|---|
| Lead Time | 16–26 weeks | 6–10 weeks (30–50% faster) |
| Price | Full OEM pricing | 20–40% lower |
| Dimensional Fit | Factory standard | 100% drop-in compatible |
| Material Range | Standard alloys | Exotic alloys including Zirconium |
| Warranty | 12 months | 18 months from shipment |
| Impeller Design | Reverse vane | Reverse vane — identical hydraulic design |
Full Group Coverage — Group I, II, and III
Every Durco Mark III group size with 100% dimensional accuracy. The reverse vane impeller design reduces seal chamber pressure and extends bearing life.
⚙️ Group I
1K1.5×1LF-4 · 1K1.5×1-6 · 1K3×1.5-6 · 1K3×2-6 · 1K1.5×1LF-8 · 1K1.5×1-8 · 1K3×1.5-8
⚙️ Group II
2K3×2-8 · 2K4×3-8 · 2K2×1LF-10 through 2K6×4-13A · 2K3×1.5LF-13 through 2K4×3-13HH
⚙️ Group III
3K8×6-14A · 3K10×8-14 · 3K6×4-16 · 3K8×6-16A · 3K10×8-16 · 3K10×8-16H · 3K10×8-17
Performance Especificaciones
- 📐 Maximum Flow: 7,500 GPM (1,700 m³/h)
- 📐 Maximum Head: 990 ft (300 m)
- 📐 Maximum Temperature: 700°F (370°C)
- 📐 Maximum Pressure: 400 PSI (27 bar)
- 🔧 Impeller: Reverse vane design — reduces seal chamber pressure, extends seal and bearing life
- 🛡️ Bearings: Heavy-duty; SKF or equivalent; oil or grease lubrication
- 🔒 Seal Chambers: CBS, CBL, FMS, FML configurations; single & double mechanical seals
- 📏 External Impeller Adjustment: Fast, accurate clearance setting without disassembly
Wet-End Materials
All wet-end components available in the complete material range with EN 10204 3.1 MTR and PMI verification.
CF8M (316SS)
CD4MCuN (Duplex SS)
CN7M (Alloy 20)
WCB (Carbon Steel)
Hastelloy B & C-276
Nickel 200 · Monel
Titanium Gr.2 · Pd7B
Zirconium 702
Common OEM Cross-Reference
Send us your Durco Mark III part number or serial number — we cross-reference within 24 hours.
| Pump Size | Group | D MK3 Casing Part # | D MK3 Impeller Part # |
|---|---|---|---|
| 1K1.5×1-6 | Group I | DKA100 | DKA3 |
| 2K4×3-8 | Group II | DAG100 | DAG3 |
| 3K8×6-14A | Group III | DNA100 | DNA3 |
| 3K10×8-17 | Group III | DNH100 | DNH3 |
Industries Served
🏭 Chemical Processing
Corrosive chemicals, acids, caustics
⛽ Petrochemical
Hydrocarbons, sour service (NACE MR0175)
📄 Pulp & Paper
Chemical recovery, liquor transfer
🔩 Primary Metals
Pickling, plating, process cooling
💊 Pharmaceutical
High-purity process fluids
💧 Water & Wastewater
Chemical treatment, effluent handling
Preguntas Frecuentes
Is the D Mark III truly 100% interchangeable with the Durco Mark III?
Yes. Every mounting dimension, nozzle location, shaft centerline, and baseplate bolt pattern matches the OEM Durco Mark III specification. The reverse vane impeller design is hydraulically equivalent. Drop-in replacement — no site modifications needed.
What seal chamber options are available?
We offer all standard Durco seal chamber configurations: CBS (Standard Bore), CBL (Large Bore), FMS, and FML. Single and double mechanical seal arrangements with API flush plans are fully supported.
How do you handle discontinued Durco models?
We maintain patterns and drawings for legacy Mark III sizes. If your model is discontinued, send us the serial number or a dimensional drawing — we can reverse-engineer from your specifications or existing parts.