Hose and Fittings Measurements: Pressure

Over the past few weeks, we’ve explained the intricacies of STAMP, which is Parker Hannifin’s handy way of ensuring customers always purchase the right hose and fittings. Purchasing the right hose and fittings helps the workplace stay safe and improves the lifespan of hydraulic equipment.

Obviously, choosing the right hose and fittings is important. Today, we’re going to explain the final piece of the STAMP puzzle and tell you all about hose pressure, which tends to be one of the most important qualities to look for when purchasing a hose assembly.

How STAMP works

So far, we’ve explained the first four letters of the STAMP acronym. Buyers need to pay attention to all of these qualities in order to purchase the right type of hose for the job:

-Size

-Temperature

-Application

-Media

-Pressure

P –How to measure Pressure

When it comes to pressure, there are two general measurements that buyers need to be careful of: system working pressure and pressure surges and spikes. The system working pressure is the pressure that is generally applied to the hose under normal working conditions, while spikes and surges can occur during startup, shutdown, and other events.

When purchasing hose, the selection must be made so that the published maximum working pressure of the hose is equal to or greater than the maximum system pressure. In other words, surge pressures or peak transient pressures in the system must be below the published maximum working pressure for the hose.

Hoses should never be used above the maximum working pressure. High-quality hoses from Parker Hannifin carry a 4:1 design factor unless otherwise noted. Pressure is designated in PSI or Pounds per Square Inch.

A hose assembly is only as strong as its weakest link. Pressure will always travel the path of least resistance, and sometimes, that path takes it to a poorly rated hose at some point on the line. There is no point purchasing high-pressure graded hose at one point on the assembly only to use hose rated at a lower pressure at another point on the assembly. Mixing and matching components will increase the risk of hose failure.

Why measuring Pressure is so important

Taking into account the pressure of a hydraulics arrangement is incredibly important. A high pressure burst can cause leaks within the line, which increases the wear and tear on equipment and can put the workplace in danger.

Pressure spikes can occur very quickly. In fact, some pressure spikes occur too quickly for standard glycerin-filled gages to detect them. For that reason, hose and fittings companies like Parker Hannifin use Senso Control technology to detect the frequency and power of these pressure spikes.

To protect hydraulics equipment and the jobsite, be sure to take pressure into account when purchasing any hose or fittings. Choosing hose with the wrong pressure can have disastrous consequences.

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