Hydraulischer Testpunkt

A hydraulic test point fitting is a component that creates an access point to a hydraulic port. This allows specialists to connect measuring devices to assess the system pressure or test hose. There are male and female test point fittings. They can contain different thread types (NPT, BSPP, JIC, SAE, and metric) and materials (corrosion resistant stainless steel). They also can have a built in check valve to minimize fluid leakage and contamination when pressure testing. These fittings screw directly into port of the hydraulic system.

Adapters and test couplings provide an efficient way to connect and disconnect test hoses to hydraulic test points. Selection of an appropriate adapter (ORFS swivel, JIC, or metric) aids in ensuring proper alignment with the fitting and pressure gauge. A test coupling provides a secure, non-leaking connection to the system that allows for the addition of pressure measurement devices, and the use of pressure diagnostic tools.

When test point fittings are used in stainless steel, it is because of the highly demanding environments that they are in, which offer the ability for extreme corrosion resistance, durability, and overall cleanliness. This is for environments where an oil and its cleanliness, along with an extensive service life and exposure to extreme conditions, and with stainless steel, it aids in the retaining of reliable readings of pressures and retaining the equipment of the hydraulic system.

Common thread types for these are NPT, BSPP, JIC, SAE, ORFS, and metric threads. With these different types of threads come different sealing methods, which affect how they connect and how easy they are to install. An example of this is ORFS which is a flat-face swiveling connector that helps with sealing which aids in minimizing overall contamination. NPT is a connector that uses threading and sealant. It is very important to match the test point with the appropriate thread that is attached to the port to avoid leaks and to allow for safe testing of the pressure.

To measure system pressure correctly, use a test point fitting and a pressure gauge, both of which are pressure rated for the system (PSI or bar). Secure the test hose to a test coupling or a test adapter, and check for and remove air from the line, then slowly pressurize the system while monitoring for any leaks. To avoid contamination and damage to the equipment, use the recommended PPE and the manufacturer's instructions regarding the maximum system pressure and safe operating procedures.

The types offered are inline test point fittings for hose connections, bulkhead test point fittings for panel or tank installations, and compact direct mount fittings for manifold ports. The bulkhead versions offer a sealed pass-through for mounting on bulkheads, and the hose-ends offer test hose connection for easy quick coupling. Based on access and space, as well as the need for a swivel, female, or male connection, choose the appropriate type.

To avoid contamination, employ the use of clean test hoses, dust caps, and sealed test point fittings when not in use. Use ORFS swivel or flat-face connectors that capture dust for unvented cavities. Follow correct flushing and purging protocols before attaching gauges, and maintain the device and select the correct device components. These will all come together to reduce the risk of moisture and particulates entering a hydraulic system during pressure testing.

Certainly, most test point connectors can allow for continuous monitoring by use of an appropriate adaptor and test coupling to attach a pressure transducer or electronic monitor. Check that the connector and the sensor are suitable for continuous monitoring, compatible threads are utilised, and that the system is kept clean during installation. Professional grade hydraulic fittings and supportive accessories will ensure effective pressure monitoring for long periods of time.

Factors a technician needs to consider are system pressure rating, thread type (metric, NPT, BSPP, ORFS), material (stainless steel vs. carbon steel), connector type (male, female, swivel), accessibility, and whether a bulkhead or direct mount is necessary. In addition, assess contamination control, gauge and test hose compatibility, and whether safe, rapid measurements require an accessory such as quick test 20 or a specialized adapter. Selecting a test point fitting properly ensures safe measuring and accurate pressure readings.