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Tag Archive: Parker

Parker 689B series valve obsoleted

Parker 689B series valve

Parker 689B series valve

So, Parker continues to discontinue nice products 🙂

Now they obsoleted valves 689B series…

It is hard to find panel-mounted hydraulic push button valves. Most of the push-button valves are cartridges and to be assembled with a body. Body has mounting holes and some design of brackets is required to mount to assy body + cartridge to the panel.

The benefit of the valve 689B series was in mounting holes at the top, which lets easy mount to the panel.

In most applications, I easily replaced this type with an electrical button that operates a simple solenoids valve. But some specific applications require simple hydraulic manual control (some equipment at the rig, where the electrical-over-hydraulic control is not allowed by safety reasons.)

So, the question to you guys, can you advise an elegant replacement for this valve?

Updates:

Jan 29, 2020 By the advice of couple vendors I ‘m going to try to use Doering push-button valve as a replacement:

Doering push button valve

Doering push-button valve

Different spacers can be used, but I’m going to proceed with custom spacers to make button hight as low as possible over the panel. Not really elegant solution but time is limited and I need to make a decision. I will update this pose as soon as the panel is done to show how the solution looks like.

Rexroth A4VG clones

Just in case if you need replacement for Rexroth A4VG, it seems to me these guys are brothers:

Rexroth A4VG Parker C-series Dana Brevini S6CV
Rexroth A4VG Parker C-series Dana Brevini S6CV
Available Displacements:
28cc, 40cc, 56cc, 71cc, 90cc, 125cc 55cc, 81cc, 136cc 75cc, 128cc
Nominal pressure:
400 bar (5800 psi) 420 bar (6090 psi) 400 bar (5800 psi)
Maximum Permissible Fluid Cleanliness:
20/18/15 20/18/15 20/18/15
Operating temperature:
−25..+110 °C -25..90 °C -25..90 °C
Viscosity range at operating temperature:
16..36 cSt 15..40 cSt 15..40 cSt
Available control systems:
HD” Proportional control, hydraulic C” Hydraulic proportional control with internal feedback HIR” Hydraulic proportional with feed-back
EP” Proportional control, electric F” Electric proportional with internal feedback HER” Electric proportional with feed-back
ET” Electric control, direct operated, two pressure reducing valves G” Electric proportional without internal feedback HEN” Electric proportional without feed-back
EZ” Two-point control, electric E” Electric non proportional HE2” Electric on-off
DG” Hydraulic control, direct operated D” Hydraulic proportional control without internal feedback HIN” Hydraulic proportional without feed-back
– – – A” Manual lever HLR” Manual lever with feed-back

Parker Gold Cap pumps Interactive Tool

Parker Gold Cap pumps interactive tool

Parker Gold Cap Pumps Interactive Tool

Just have been gotten an interesting link from Parker distributor for their Gold Cap Pumps interactive online software:
https://divapps.parker.com/divapps/hpps/gold-cup-pump/

Here you can:

  • take a look at how different valves work internally in the pump;
  • check schematic for each pump’s option and size;
  • learn the terminology of pump internal components;
  • watch the video and download PowerPoint presentation about these pumps;
  • at the bottom of this software, you can find a link to the eConfigurator.

My notes:

  • Gold Cap pumps are pretty complicated, so any additional info like this is always helpful.
  • It will be awesome if the pumps schematics can be downloaded in DXF format to integrate into my projects.

Parker 50P filter will be discontinued soon

Just got a feedback from one of my Parker suppliers about 50P series filters: this series will be discontinued soon. I used them in a lot of my projects in the past and still continue to use them now. The supplier informed me about the next:

  • These filters are a pretty old design, from middle 1960’s and this is why this is a time to stop using these filters.
  • The suggested replacement for new projects (by pressure and flow rate) is WPF series
  • The price for 50P filters will be increased soon to stimulate customers to start to use WPF.
  • No more expedite option even with the price increasing for 50P filters.

The main problem with WPF filters is a design: Base-ported (50P) vs head-up (WPF):

Parker 50P vs WPF filters

In some applications where I use 50P filters now, will not be so easy to replace filters with new WPF series. There are a lot of factors like access to replace filter element in the current place, different mounting brackets will be required, extra hours for our mechanical engineers to design these brackets and etc.

Moreover, in the applications, we have already done for the years this replacement will not be possible at all.

This is why the best way if 100% replacement can be found.

Take a look at filter Schroeder KC50:

Schroeder KC50

  • Mounting dimensions are 100% the same (5″ x 4.5″):
    Parker 50P vs Schroeder KC50
  • Schroeder KC50 is approx. 2.5″ higher
  • The same rated pressure 3500 psi (240 bar)
  • The same flow rating: up to 100 GPM
  • BONUS: Filter elements are interchangeable!
    You can check Parker’s filter elements for 50P series here and you will be surprised: they matched Schroeder’s KC50 series!

So, if you take a look closer on Parker 50P and Schroeder KC50 you can find these products are 99% identical and we can use Parker’s filter elements in Schroeder filters and opposite.

Really, these filters are suspiciously similar! Therefore I made a request to Schroeder about KC50 filters and got a confirmation they were designed to be interchangeable. The only thing they noticed to be aware is the 50P had an option where they have a reverse flow check option for hydrostats in the housing and the Schroeder version of that filter assy is a KFH50. Also, for 3000 psi pressure (210 bar) you can save a little bit money and use identical filter KF30 series (with the same flow rate).