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Description
Aftermarket Parker RAH161S50 Relief Valve for Excavator LoaderReplacement part number: RAH161S50 Specification: Division: Hydraulic Systems Division Flow Rate: 80 gal min, 302. 8 L min Flow Rate: 80 GAL MIN, 302. 8 L MIN Maximum Inlet Pressure Rating: 5500 PSI, 380 BAR Pressure Control Range: 500 5000 PSI, 34. 5 350 BAR Maximum Inlet Pressure Rating: 5500 psi, 380 bar Adjustment Mechanism: Screw Seal Material: Nitrile Pressure Control Range: 500 5000 psi, 34. 5 350 bar Adjustment Mechanism: Screw Seal Material:
Replacement part number:
RAH161S50Specification:
Division: Hydraulic Systems Division
Flow Rate: 80 gal/min, 302.8 L/min
Flow Rate: 80 GAL/MIN, 302.8 L/MIN
Maximum Inlet Pressure Rating: 5500 PSI, 380 BAR
Pressure Control Range: 500-5000 PSI, 34.5-350 BAR
Maximum Inlet Pressure Rating: 5500 psi, 380 bar
Adjustment Mechanism: Screw
Seal Material: Nitrile
Pressure Control Range: 500-5000 psi, 34.5-350 bar
Adjustment Mechanism: Screw
Seal Material: Nitrile
Maximum Flow Rate: 80 gal/min, 302.8 L/min
Maximum Operating Pressure: 5000 psi, 350 bar
Maximum Tank Pressure: 5000 psi, 350 bar
Standard Setting Pressure: 2500 psi, 172.4 bar
Maximum Pressure Setting: 5000 psi, 350 bar
Pressure Control Sensitivity: 1910 per turn psi, 131.7 per turn bar
Reseat Pressure: 90% of pressure setting
Actuation Type: Pressure Sensing
Configuration: Pressure Relief
Leak Rate: 5 per @ 100 psi (6.8 bar) setting cm3/min
Mounting Type: Screw in cartridge valve
Cavity Size: C16-2
Function: Pilot Operated
Operation Type: Automatic
For Fluid Type: Mineral-based or synthetic hydraulic fluids
Maximum Kinematic Viscosity: 45-2000 SSU (6 to 420 cSt)
Filter Efficiency Rating: ISO 4406 18/16/13, SAE Class 4
Valve Material: All parts steel. All operating parts hardened steel
Installation Torque: 121-125 lb-ft, 164-170 Nm
Operating Temperature: -30 to +250 °F, -34 to +121 °C
Maximum Operating Temperature: +250 °F, +121 °C
Minimum Operating Temperature: -30 °F, -34 °C
Body Material: N/A
Application:
Fit for Excavators, Loaders and so on machines with Parker Pilot Operated Relief Valve RAH161S50.
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4.1 ★★★★★
Based on 1862 reviews
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Product Reviews
★★★★★ 4
Great pillow !
Size: Queen
This pillow met my expectations. Very comfortable with the right amount of firmness. Love the shape as well.
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Reviewed in the United States on January 6, 2026
★★★★★ 5
This is everything you could want in a good pillow for a good sleep
Size: Queen
This is truly the very best pillow on the planet. So really comfortable, doesn't loose its shape and for a good sleep, this is it.
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Reviewed in the United States on May 5, 2026
★★★★★ 5
This is Truly the Best Pillow!
Size: Queen
This is the side sleeper version of the best pillow out there.
My 26 year old son was always complaining about his pillow and his neck and back hurting. About every year I’d buy him the next “best” pillow promising to be the best but they never worked for him. I read an article saying THIS pillow was the “Goldilocks” of pillows. So since he sleeps in all positions, I got him the regular shaped pillow. The next morning after his first night with the pillow, he came out of his room talking about how wonderful his pillow is. Same thing the next morning. And the next. And the next. Then I thought to myself, my current pillow is the best I’ve had but I’m not in love with it. But I’m a side sleeper so I purchased this particular contoured pillow for me. NOW I UNDERSTOOD WHAT MY SON WAS TALKING ABOUT. I became the person who went on and on about my pillow. Until my husband told me to replace his with one of these side sleeping versions for himself. And he loves it. Then we got a regular pillow (for those who sleep in all positions, but this same company) for our guests. My best friend came to visit, immediately noticed the pillow upgrade from previous visits and when she returned home, she purchased one for herself.
This pillow is like a feather pillow except it is filled with tiny squares of memory foam. And it comes with an extra pack of stuffing, so you can add or remove stuffing to customize it perfectly for you. None of us in the house added filling, and my son removed some that came with his pillow. I also sleep with a body pillow and have for years. And I was wishing this came in a body pillow version until I realized I could make my own. I bought a zippered body pillow case. The larger size. I think it was 54 inches long. And I bought a king size pillow and used the extra stuffing pack that came with that pillow along with the 4 packs that came with the other pillows that we didn’t use. Though you could probably do the same thing with two standard size pillows. These pillows are on the expensive side but they go on sale during every holiday. That’s when I purchase them. Oh and my body pillow is HEAVEN. Between that and the pillow, I spend my nights in fluffy cloud goodness.
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Reviewed in the United States on May 31, 2026
★★★★★ 3
Not as great as I was hoping.
Size: Queen
I was hoping this was going to be my miracle pillow. I have had terrible neck pain for years. It arrived with too much stuffing. Removed some and it caused terrible occipital headaches. I’ve slowly been adding stuffing, hoping to find the right fit.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Best pillow ever!!!
Size: Sapphire Queen
I have actually tried dozens and dozens of pillows in my life, and dozens in the past three years, but this is it. Some cheap, some very very expensive, and some very famous brands. This one beats them all. So awesome and comfortable (side sleeper). I tried one and loved it so much I ordered a second right away. It is exactly what I've been searching for forever!!!
Stays in shape, extremely comfortable. Only thing is you definitely need a 32" pillowcase to cover it, and I wish they made a 34" pillowcase, but no luck. I used the pillow the same night and it's definitely worth the money.
No neck pain, super squishy but supportive, and no odor.
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Reviewed in the United States on October 31, 2025