OEM part number · aftermarket reference
MY55565A40 identifies the impeller of a Durco Mark 3-pattern process pump in size 1K11/2×1LF-4, Group 1. The aftermarket equivalent is YSM reference DYA3, manufactured by YSM as a non-OEM part to that dimensional pattern. The number is used for identification only; fit is confirmed against the installed pump drawing before quotation.
MY55565A40 at a glance
| OEM part number | MY55565A40 |
|---|---|
| Part | Impeller |
| Pump pattern | Durco Mark 3 (ASME B73.1 dimensional pattern) |
| Size | 1K11/2×1LF-4 · Group 1 |
| YSM reference | DYA3 |
| Supplied by | YSM Pumps, non-OEM, made to the Durco Mark 3 pattern |
Other parts for size 1K11/2×1LF-4
If the pump is opened for this part, these are the other published positions for the same size, each with its YSM reference and the OEM number it corresponds to.
| Part | YSM ref. | OEM no. |
|---|---|---|
| Impeller | DYA3 | MY55565A40 |
| Casing | DYA100 | BY40035AI |
| Cover | DKA106 | CY22418A |
| Cover | DKA106B | CY52018A |
| Cover | DKA106D | CY54131A |
| Cover | DKA106E | CY54132A |
The full list for every published size is on the Durco Mark 3 parts list, and all 223 numbers for both programmes are on the ANSI pump parts cross-reference.
Materials
Wet-end parts are supplied in CF8M (316 stainless steel), CF3M (316L), CD4MCu duplex, super duplex, CN7M (Alloy 20), Monel, nickel, Inconel, Hastelloy B and C, titanium and a zirconium alloy; casings also in WCB carbon steel. Alloy verification by spectrometer is standard and material certificates are supplied on request. Which material applies to your pump is decided from the liquid, concentration and temperature, or from the material of the part being replaced.
What to send for a quotation
- Nameplate photo: size designation with its frame or group prefix and serial number
- The part and the quantity, with this number or the part name
- Material of the installed part, or the liquid, concentration and temperature
- For an impeller: the trim diameter marked on the part, or the duty point (flow and head)
Frequently asked questions
What part is MY55565A40?
MY55565A40 is the OEM reference for the Durco Mark 3 impeller on a Durco Mark 3-pattern pump of size 1K11/2×1LF-4, Group 1. The matching YSM reference is DYA3, an aftermarket part manufactured by YSM.
Is MY55565A40 the same as YSM DYA3?
They are not the same article. MY55565A40 is the OEM number used to identify the part position; DYA3 is the YSM reference for the aftermarket part made to that Durco Mark 3 pattern at the same size and Group 1. Fit is confirmed against the installed pump drawing before quotation, not from the number alone.
What do you need to quote MY55565A40?
The pump nameplate (size designation with its frame or group prefix and serial number), the part and quantity, the material of the installed part or the liquid, concentration and temperature if the material is to be reviewed, and for an impeller the trim diameter or the duty point.
Trademarks
Durco and Mark 3 are trademarks of Flowserve Corporation or its subsidiaries and are used here only to identify the pump pattern this part is made to fit. YSM Pumps (Jinan Yingsiman Machinery Co., Ltd.) is an independent manufacturer, is not affiliated with, authorised by, sponsored by or endorsed by the trademark owner, and the parts listed are non-OEM parts manufactured by YSM.