Here are 3 signs of pressure relief valve failure to watch out for.
Contaminants, like dirt, lint, rust, sludge, or even the misalignment of the valve can cause the pressure relief valve to stick. If your system is not reaching the right pressure, it could be a sign of pressure relief valve failure. If there is no port, use an adapter to install the gauge. Pressure relief valves and safety relief valvesare what keep a facility safe. 
You will need to ensure that the valves are set to the correct set pressure. Complete the form below & we'll have a quote to you in 30 minutes or less. Hydraulic relief valves limit system pressure to protect components. If the valve was calibrated to the wrong set pressure, it could simply be releasing early. A properly maintainedpressure relief valvecan stay in service for up to 30 years.
Start the machinery, and test the relief valve by starting the circuit. Most equipment will have a port already installed for this purpose. At this point, you might see that your system is above pressure, or you will notice other pressure relief valves in the system releasing to make up for this valves malfunction.
If your system builds up more than safe maximum pressure, safety relief valves open up to let off additional pressure, keeping your facility, your employees, and your equipment safe. After years of service, the valve could be damaged or eroded from environmental dirt and debris, which block the valve from fully closing. Remove the JIC plugs and caps, and reconnect any hoses removed in Step 2. Fluid Power World covers pneumatics, mobile hydraulics and industrial hydraulics. Electro-Pneumatic Regulator & Flow Controller Design. This is what is known as the valve cracking pressure, which is the pressure at which the relief valve starts to open. If your pressure relief valve has no pressure, it is likelythat the balance hole is plugged, the spring is broken, or the valve has a loose fit.
In the case of a loose fit or broken spring, replacement is a must.
|, If the valve was calibrated to the wrong set pressure, Pressure relief valves and safety relief valves, article from the Journal of Emerging Technology and Advanced Engineering. Need help? The relief valve will normally have a locking hex nut and an Allen head adjuster or hand wheel adjuster. Start the equipment and activate the hydraulic circuit. Consult and review the machine drawings to figure out which circuit needs adjustment. Using any method of capping or plugging a hose other than with the proper JIC plug or cap is unsafe and should never be attempted. Cory has a whatever it takes attitude and helps maintain a customer service team that is accountable, honest, efficient, and hard-working.
Locate and remove the hydraulic hose on the system side of the relief valve. All manufacturers names, numbers, and descriptions are used for reference purposes only. With a personal goal of taking care of the customer at all costs, CEO Cory Gilbert has been a driving force behind the high level of customer satisfaction at Hydraulic Parts Source since 2009.
If your system is above pressure and your pressure relief valves have not released, this could be a relief valve failure.
This can cause chattering, where the valve isnt all the way open, but is opening and closing rapidly, stopping it from properly doing its job. If that doesnt solve the problem, and the rest of your system is working properly, then your pressure relief valve likely needs to be changed.
All rights reserved. Loosen the pressure relief valve adjustment as far as it will go. Shut down the machinery and allow the pressure to bleed off.
Whenever the relief valve opens in response to a predetermined pressure, it releases heat.
A quality inline safety relief valve testing system can help you here. Call (586) 800-0875. All hydraulic system relief valves work by balancing the hydraulic force with an adjustable spring force.
If youve been testing your valves regularly, its likely theres something else in your system to blame. One of the first things youll learn about Cory in his professional life is his belief that customer relationships are everything..
If a relief valve is set but is releasing pressure before a system reaches maximum pressure, or if its constantly leaking or chattering, something may be wrong with the system. While the other two signs appear obvious, this last sign is more noticeable when youre directly inspecting your pressure relief valves. In some cases, technicians forget to recalibrate pressure relief valves for the systems new normal operating pressure. Properly setting, inspecting, and maintaining pressure relief valves in a hydraulic system is key to operating a safe facility. If valves are not set properly or monitored carefully, the hydraulic system can malfunction and suffer damage. In most cases, It is important to look at the why behind pressure relief valve failure, rather than just replacing the valve in question. It is not to be implied that any item is the product of these manufacturers.
Below we describe the steps involved in setting hydraulic system relief valves and the signs that a valve needs replacing. 41350 Production Drive Harrison Township, MI 48045, Toll Free: (888) 477-7278 Toll Free Fax: (888) 477-7279, Phone: (586) 463-3166 Fax: (586) 463-3398. This is part of the reason that valve testing and maintenance is so important.
Tighten the adjuster lock nut securely, being careful not to disturb the valve setting. Locate the relief valve for the circuit.
Adjust the relief valve by turning the adjuster clockwise until the reading on the gauge builds to the pressure called for on the machine drawings. Connect a pressure gauge between the relief valve and the pump. Your valve technicians can go in and adjust the valves set pressure to address this issue. The valves also limit the hydraulic systems maximum output force. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of WTWH Media. The valve does not function properly within your system, which means its not protecting your facility, your employees, or your equipment in the event that there is a larger problem. Call Customer Service at (586) 800-0875. You'll get a quote in 30 minutes or less. This deadheads the hydraulic circuit in order to isolate the system to just the pump and relief valve. Thisarticle from the Journal of Emerging Technology and Advanced Engineeringprovides a helpful flowchart outlining the troubleshooting procedure to take in the event that you experience pressure relief valve failure. Fluid Power World is written by engineers for engineers engaged in designing machines and or equipment in Off-Highway, Oil & Gas, Mining, Packaging, Industrial Applications, Agriculture, Construction, Forestry, Medical and Material Handling. This can happen with changes to your facilitys plant design.
Do not cap off the return or tank side of the relief valve.
When your system cannot reach pressure, you will likely experience production slowdown or downtime. Cap off the hose and valve with the correct JIC caps or plugs. Leaking valves are a problem, and can contribute to slower, less efficient production, but they can be more difficult to notice, as their effect on the entire system can be much smaller. Cory is a graduate of Alma College with a degree in Finance and Marketing. The pressure reading on the circuit should not rise above the pressure that was set on the relief valve. It could be the valve, it could be that misalignment is causing a failure to reseat after a correct opening, or it could be that there is more pressure in your system than the valves set pressure. 2022 Hydraulic Parts Source, All Rights Reserved. The pressure reading on the gauge should be close to zero.
Its important to learn the signs of a possible failure in order to quickly solve the problem and keep your facility safe.
Outside of work, he enjoys spending time with friends and family. In some cases, this could be fixable.
WTWH Media LLC and its licensors. A failing pressure relief valve is most often a symptom of a greater problem.
Pressure valve leakage is a little more complicated to troubleshoot, as there are many possible causes. Relief valves are always piped in parallel to the pump and are normally as close to the pump as possible. That said, pressure relief valves can and do fail. Need immediate help? A properly adjusted valve will enable the system to operate correctly, while controlling the amount of heat generated. by Cory Gilbert | Feb 23, 2021 | Fluid Power Technical Topics. Capping off or plugging unused hoses and fittings prevents the loss of hydraulic fluid and system contamination.
He is a sports fan who also enjoys golfing in his free time.
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