The numbers printed on valves and hoses aren't marketing: they define whether the product is safe for your application. Let's decode them.
Working pressure
It's the maximum pressure at which the product can operate continuously and safely. You must never exceed it. On hoses it's given in PSI or bar.
Burst pressure and safety factor
The burst pressure is where the product fails. The ratio between burst and working is the safety factor. On hydraulic hoses the standard is 4:1: a hose with 5000 PSI working pressure bursts near 20,000 PSI. That margin protects against pressure spikes.
WOG
On valves you'll see "1000 WOG" (Water, Oil, Gas). It means 1000 psi in those fluids at ambient temperature. Note: at higher temperature, the allowable pressure drops.
SAE standards
On hydraulic hoses, SAE 100 R1, R2, R4 or 4SP standards indicate construction and pressure range. The more steel braids, the higher the pressure supported.
Practical example
If your circuit works at 2500 PSI, don't pick a hose with "2500 PSI burst": you need one whose working pressure is 2500 PSI or more, with its 4:1 factor. Confusing working with burst is a dangerous and common mistake.
Questions about a datasheet? Send it to us on WhatsApp and we'll confirm whether the product fits your case.
