Flowserve Mark III STD Pump Replacement Parts
Flowserve Mark III STD Pump Replacement Parts — OEM, NON-OEM & Aftermarket
Direct replacement parts for Flowserve Durco Mark III STD process pumps. 100% dimensionally interchangeable. Quote in 48 hours.
- All POS codes covered — Impellers, Oil Seals, Gaskets, O-Rings
- INPRO VBXX BZX oil seal compatibility
- Three quality tiers: OEM, NON-OEM & Replacement
- Exotic alloys in stock: CD4MCuN, Hastelloy, Titanium
Same dimensions. Same performance. Better value.
Flowserve Durco Mark III STD — Common Replacement Parts by POS Code
Each part is manufactured to 100% dimensional interchangeability with original Flowserve Durco Mark III STD pumps. Every component ships with full EN 10204 3.1 material traceability and PMI verification.
| POS Code | Part Name | Material Options | Standard Lead Time | Action |
|---|---|---|---|---|
| POS.2200 | Impeller | CD4MCuN, 316SS, Hastelloy C-276, Alloy 20, Titanium Gr.2 | 8-10 weeks | Quote → |
| POS.4300.1 | Oil Seal Inboard (INPRO VBXX BZX) | Bronze, 316SS | 24-48h (common sizes) | Quote → |
| POS.4300.2 | Oil Seal Outboard (INPRO VBXX BZX) | Bronze, 316SS | 24-48h (common sizes) | Quote → |
| POS.4590.1 | Gasket Cover | Aramid, PTFE, Graphite, NBR | 24-48h | Quote → |
| POS.4590.2 | Gasket Impeller | Aramid, PTFE, Graphite, NBR | 24-48h | Quote → |
| POS.4610.1 | O-Ring Adapter | NBR, FKM, FFKM, PTFE | 24-48h | Quote → |
| POS.4610.2 | O-Ring Bearing Carrier | NBR, FKM, FFKM, PTFE | 24-48h | Quote → |
Additional POS codes available upon request. Send your complete parts list for comprehensive pricing.
Three Quality Tiers for Flowserve MK3 STD Parts
Every inquiry receives pricing at all three tiers. Compare and select the right balance for your operation:
OEM
Original Flowserve parts from authorized distributors. Full traceability and OEM warranty.
Best for: warranty compliance, critical equipment
NON-OEM Equivalent
Identical-quality parts manufactured to Flowserve specifications. Save 20-40% vs. OEM. Same material, same warranty.
Best for: routine maintenance — 80% of customers choose this
Replacement
100% interchangeable fit and function at the most competitive price. Fastest delivery available.
Best for: non-critical service, urgent replacements
Material Options for MK3 STD Pump Parts
CD4MCuN Duplex
316 Stainless (CF8M)
Alloy 20 (CN7M)
Hastelloy C-276 (CW6M)
Titanium Gr.2 (C3)
Monel 400 (M35-1)
Delivery & Lead Times
| Part Type | Availability | Standard | Expedited |
|---|---|---|---|
| Gaskets & O-Rings (Common POS) | In Stock | 24-48h shipping | Same day |
| INPRO VBXX Oil Seals (Common) | In Stock | 24-48h shipping | Same day |
| Custom Gaskets & O-Rings | Made to order | 4-6 weeks | 2-3 weeks |
| Impellers (All Alloys) | Made to order | 8-10 weeks | 6 weeks |
| Shaft Sleeves | Made to order | 6-8 weeks | 4 weeks |
Frequently Asked Questions
Yes. All NON-OEM and REPLACEMENT parts are manufactured with 100% dimensional interchangeability. We maintain complete OEM drawing libraries and every part undergoes dimensional inspection before shipping.
We cover all standard POS codes for the Flowserve Durco Mark III STD, including but not limited to: POS.2200 (Impeller), POS.4300.1/.2 (Oil Seals), POS.4590.1/.2 (Gaskets), POS.4610.1/.2 (O-Rings), plus shaft sleeves, wear rings, and mechanical seals. Send your complete POS list for coverage verification.
Send your parts list with OEM part numbers, POS codes, quantities, and material requirements to our engineering team. You will receive OEM, NON-OEM, and REPLACEMENT pricing within 48 hours.
Yes. Every shipment includes MTR EN 10204 3.1, dimensional inspection reports, and a Certificate of Conformance. PMI verification is available upon request.
Submit Your MK3 STD Parts List — OEM, NON-OEM & Replacement Quotes in 48 Hours
List your POS codes, OEM part numbers, quantities, and material requirements. Our team responds with pricing at all three tiers.
Prefer email? Send your parts list to [email protected] — Subject: “MK3 STD Parts Quote – [Your Company]”
ISO 9001 · ASME B73.1 · INPRO VBXX Compatible · Serving chemical plants, refineries & paper mills worldwide