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Hi, thank you for the reply. So the highlighted valve has the same pressure as the valve # 1? My question is : couldn't the system work without it? In this configuration, the P1 should first overcome the spring of the highlighted valve a then unload through valve 1. Wouldn't be easier...

Hi, I have a question regarding the pump unloading valve. Below is the link to the datasheet: https://apps.boschrexroth.com/products/compact-hydraulics/ch-catalog/pdf/059006XYZ_RE18310-13.pdf I cannot understand what is the point of the section (valve) encircled in a picture below. I believe...

Hi, What is the best literature regarding hydraulic cylinder with emphasis on design. Thank. Best regards, Robert

Hi, I got this on the drawing 7/8 - 14 2B. What does 2B stand for? Thank you in advance.

EPDM is the way to go. 120°F is less than 49 °C which is terribly low.

I am not in USA.

Thanks for the reply. The problem with EPDM is that is not available in various sizes.

Thanks for the answer. I don not know the exact compound yet. Since the temperature is the main issue, I am afraid the NBR will not do the job for me.

Hi, Does anybody have any experience regarding cooling water (glycol + water) compatibility with FKM and NBR seals? I am referring to the O-rings which can be found on hydraulic hose fittings. I found this compatibility table from Parker...

Hi, I came across a hydraulic valve with 205 VDC coil recently. The coil has a connector with rectifier mounted on it. That means that the voltage applied to the coil is 230 VAC. I am wondering, why not use an AC valve with 230 VAC coils instead of valve with 205 VDC coils?

Thank you for replying. Did you mean B16.5 instead od B15.5?

Hi, Need some help to identify a flange. Attached are the photos of the flange. According to the designations I would say it could be ASME B16.5 flange with groove RTJ. Any opinion would be appreciated. Thank you.

I don't unfortunately. :(

Perhaps you could use: 21.89 x 2.62 12.42 x 1.78 Those are the standard o-rings (see page 3 below): https://www.parker.com/literature/Industrial-Systems-Division-Europe/Catalogues/Industrial%20Valves%20UK/02/Access02.pdf

Hello, Check Hydac datasheet for VP-DRP10. https://www.hydac.co.nz/media/productattach/e/_/e.5.249.8.0.01.13.pdf 2x O-Ring 25,07 x 2,62 90 Shore FKM 2x O-Ring 5,28 x 1,78 FKM Best regards, Robert

Hello, What is the difference between standard and norm? Thanks im advance.

I believe you will get less cooling power. Because the net is the restriction to air flow, just like debris and leaves. On the other hand, if the cooler is sized big enough it should work.

Hi Prometheus21, Sorry for a delay in my reply. Thank you for a very extensive elaboration.

Hi, When using connections for pressurized sir (e.g. male stud adapter) do you prefer to use PTFE tape as a Seal or Cooper washer?

Perhaps something like this: https://products.swagelok.com/en/all-products/fittings/pipe-fittings/adapters/straights/p/fitting-0066 But as TugboatEng said, wee need more info.