Parker cross reference: Are D3W and WE10 series interchangeable?
We received a heartwarming response from our many readers over the recent post on WE6 and D1VW interchangeability. Some of the readers also followed up with questions about other directional and cartridge valves, particularly the WE10 series and its replacements. We are here with a detailed reply.
D3W and WE10: A Quick Overview
Parkerâs D3W and Boschâs WE10 are series of solenoid operated directional control valves. They offer operating pressures of up to 350 bar and flow rates of up to about 150 liters/min. With over 20 different spool configurations [1], they are versatile enough for use in a wide range of hydraulic applications.
D3W and WE10: A Comparison
While both valves serve the same function and have similar operating pressures and flow rates, we still have to look at the technical specifications to paint a complete picture for their interchangeability. Let us start.
| Bosch Rexroth | Parker Hannifin | |||
|---|---|---|---|---|
| Series | WE10 [2]
| D3W [3] | ||
| Nominal Size | DIN NG10/ NFPA D05 | DIN NG10 / CETOP 05 / NFPA D05 | ||
| Mounting Interface | ISO 4401/ NFPA D05 | DIN 24340 A10 / ISO 4401 / CETOP RP 121-H / NFPA D05 | ||
| Ambient Temperature | -20-70°C (NBR seals) | -25-60°C | ||
| -15-70°C (FKM seals) | ||||
| MTTF (Mean time to failure) | 300 years | 150 years | ||
| Maximum Operating Pressure | Port P, A, B: 350 bars | Port P, A, B: 350 bars | ||
| Port T: 210 bars | Port T: 210 bars (DC), 105 bars (AC) | |||
| Hydraulic Fluid Cleanliness | Class 20/18/15 (ISO 4406) | Class 18/16/13 (ISO 4406) | ||
| Maximum Flowrate | Direct Current | 160 l/min | 150 l/min | |
| Alternating Current | 120 l/min | 115 l/min | ||
| Protection Class (electrical) | IP65 in accordance with EN 60529 | IP65 in accordance with EN 60529 | ||
| Solenoid Connection | K4*: Connector according to DIN EN 175301-803 [2] | Connector as per EN 175301-803, solenoid identification as per ISO 9461 | ||
| Hydraulic Fluid | Mineral Oils | According to DIN 51524 | Hydraulic oil according to DIN 51524 | |
| Bio-degradable | According to ISO 15380 | |||
| Flame-resistant | According to ISO 12922 | |||
| Hydraulic Fluid Temperature | -15-80°C (NBR: -20-80°C) | -20-70°C (NBR: -25-70°C) | ||
From the above comparison, we can draw the following conclusions:
- Parkerâs valves have narrower limits than Rexrothâs, therefore, keeping the operation within those limits will be essential for interchangeability.
- Due to the absence of data on bio-degradable and flame-resistant hydraulic fluids for the D3W series, the use of only mineral oil will be feasible for interchangeability.
- Due to the lenient hydraulic cleanliness standard for Boschâs valves, it will easily replace a parker valve. For vice versa, you will have to upgrade your cleaning standards.
- The interchange is only feasible if Boschâs valve has a K4 solenoid connection.
Parker Cross Reference & Competitor Interchange
While our comparison above is enough for proving the interchangeability of the two valve series, it goes a long way to validate your findings using a second source. For parker valves, Parker Cross Reference & Competitor Interchange is an excellent resource. Let us use that.
Upon searching âR901278744â (part number of a WE10 valve), we do get a D3W valve in the results. It is also green-ticked i.e., the part can connect to or mate with other items in the assembly. Thus, we can interchange D3W and WE10 valves after taking care of the limitations discussed already.
Final Thoughts
We can say with confidence that D3W and WE10 can be used in place of each other. Nonetheless, there are some limitations to the data. While Rexrothâs WE10 series has multiple options for electrical connections, Parkerâs D3W series has only a single option for the electrical connector. Therefore, WE10 variants with connectors other than K4 would require physical inspection. In that respect, we recommend that you consult with our application engineers to finalize your options.
References
- [1]Â Â Â Â Â Parker Hannifin Corporation, âDirectional Control Valves.â Ohio, 2021.
- [2]Â Â Â Â Â Bosch Rexroth AG, âDirectional spool valves, direct operated, with solenoid actuation (Type WE).â pp. 1â12, 2019.
- [3]Â Â Â Â Â Parker Hannifin Corporation, âDirectional Control Valve Series D3W,â vol. 1, pp. 5â12, 2018.
