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. Cap off the hose and valve with the correct JIC caps or plugs. 
If there is no port, use an adapter to install the gauge. A properly maintainedpressure relief valvecan stay in service for up to 30 years. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of WTWH Media. Connect a pressure gauge between the relief valve and the pump. 
Properly setting, inspecting, and maintaining pressure relief valves in a hydraulic system is key to operating a safe facility. In some cases, this could be fixable. Call (586) 800-0875. The valves also limit the hydraulic systems maximum output force.
Capping off or plugging unused hoses and fittings prevents the loss of hydraulic fluid and system contamination. 
The pressure reading on the gauge should be close to zero. 
If valves are not set properly or monitored carefully, the hydraulic system can malfunction and suffer damage. 
Most equipment will have a port already installed for this purpose. 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. If youve been testing your valves regularly, its likely theres something else in your system to blame. Here are 3 signs of pressure relief valve failure to watch out for. While the other two signs appear obvious, this last sign is more noticeable when youre directly inspecting your pressure relief valves. Relief valves are always piped in parallel to the pump and are normally as close to the pump as possible. 2022 Hydraulic Parts Source, All Rights Reserved. This is part of the reason that valve testing and maintenance is so important. Start the machinery, and test the relief valve by starting the circuit. When your system cannot reach pressure, you will likely experience production slowdown or downtime. A quality inline safety relief valve testing system can help you here. Remove the JIC plugs and caps, and reconnect any hoses removed in Step 2. 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.
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. Whenever the relief valve opens in response to a predetermined pressure, it releases heat. Fluid Power World covers pneumatics, mobile hydraulics and industrial hydraulics. Cory is a graduate of Alma College with a degree in Finance and Marketing. 
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. 
|, 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. 
If the valve was calibrated to the wrong set pressure, it could simply be releasing early. Call Customer Service at (586) 800-0875. He is a sports fan who also enjoys golfing in his free time. Complete the form below & we'll have a quote to you in 30 minutes or less. 
by Cory Gilbert | Feb 23, 2021 | Fluid Power Technical Topics. 
Your valve technicians can go in and adjust the valves set pressure to address this issue. The relief valve will normally have a locking hex nut and an Allen head adjuster or hand wheel adjuster. 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. This is what is known as the valve cracking pressure, which is the pressure at which the relief valve starts to open. This deadheads the hydraulic circuit in order to isolate the system to just the pump and relief valve. One of the first things youll learn about Cory in his professional life is his belief that customer relationships are everything..
A failing pressure relief valve is most often a symptom of a greater problem.
If your system is not reaching the right pressure, it could be a sign of pressure relief valve failure. All hydraulic system relief valves work by balancing the hydraulic force with an adjustable spring force. The pressure reading on the circuit should not rise above the pressure that was set on the relief valve. Pressure relief valves and safety relief valvesare what keep a facility safe. 
Loosen the pressure relief valve adjustment as far as it will go. 
All rights reserved. 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. You'll get a quote in 30 minutes or less. Below we describe the steps involved in setting hydraulic system relief valves and the signs that a valve needs replacing. In some cases, technicians forget to recalibrate pressure relief valves for the systems new normal operating pressure.
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. In the case of a loose fit or broken spring, replacement is a must.
Need help? 
Locate and remove the hydraulic hose on the system side of the relief valve. 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. 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. Pressure valve leakage is a little more complicated to troubleshoot, as there are many possible causes. After years of service, the valve could be damaged or eroded from environmental dirt and debris, which block the valve from fully closing. You will need to ensure that the valves are set to the correct set pressure. Locate the relief valve for the circuit. Consult and review the machine drawings to figure out which circuit needs adjustment. 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. WTWH Media LLC and its licensors. In most cases, It is important to look at the why behind pressure relief valve failure, rather than just replacing the valve in question. That said, pressure relief valves can and do fail. Do not cap off the return or tank side of the relief valve.
Tighten the adjuster lock nut securely, being careful not to disturb the valve setting. 
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. Start the equipment and activate the hydraulic circuit.
Electro-Pneumatic Regulator & Flow Controller Design. 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. Outside of work, he enjoys spending time with friends and family. All manufacturers names, numbers, and descriptions are used for reference purposes only. Cory has a whatever it takes attitude and helps maintain a customer service team that is accountable, honest, efficient, and hard-working. If your system is above pressure and your pressure relief valves have not released, this could be a relief valve failure.
Its important to learn the signs of a possible failure in order to quickly solve the problem and keep your facility safe.
This can happen with changes to your facilitys plant design. 
Contaminants, like dirt, lint, rust, sludge, or even the misalignment of the valve can cause the pressure relief valve to stick. 
It is not to be implied that any item is the product of these manufacturers. Need immediate help? A properly adjusted valve will enable the system to operate correctly, while controlling the amount of heat generated. Hydraulic relief valves limit system pressure to protect components. 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. 
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