serv-Clip Device Taps into Hydraulic Lines

April 16, 2014
The potentially complicated task of installing test ports onto existing systems is made easier.

The benefits of assessing a hydraulic system’s condition are well documented. Even though pressure transducers, flow meters, and temperature sensors may not be required for routine operation of a machine, portable diagnostic instruments monitor these parameters to determine a hydraulic system’s condition. But even regular monitoring of pressure, flow, and temperature can miss sensitive fluid conditions, such as particulate contamination, oxidation, water infiltration, and additive depletion.

Evaluation of these conditions requires taking fluid samples and analyzing them in a laboratory environment. The problem is that determining where fluid samples or pressure, flow, and temperature readings should be taken often are determined after a machine has been commissioned. Installing test ports, then, requires disconnecting a hydraulic system’s fluid lines, installing the test ports in strategic locations, and reconnecting everything. This procedure is not only labor-intensive and time consuming, it also leaves a system open to infiltration of dirt, water, and air — not to mention leaks if fittings are not reconnected just right.

A quick and convenient alternative to this potentially complicated task of installing test ports onto existing systems is offered by serv-Clip, manufactured by BKM Machine, Hagen, Germany. Two versions are available — one that can be connected to pressurized line and one that connects to unpressurized lines. Both are made of stainless steel and come in standard sizes for 10- to 42-mm steel pipe, 3⁄8- to 2-in. OD tube, and ¼- to 3-in. ID pipe.

serv-Clip is composed of a clamp that attaches to a tube or pipe, a stem that pierces the tube or pipe, and a port for connecting a pressure gauge, transducer, or other measuring instrument. The stem pierces the line in a way that does not introduce debris into the fluid. A small tube can also be connected to the port for taking fluid samples.

Installation requires only a few steps and is said to take less than 3 min. After selecting placement:

•remove paint and clean the site to be tapped,

•place the clamp onto the line and tighten fasteners,

•torque down the stem to pierce the hydraulic line,

•attach the sampling tube or measuring instrument to the port.

Also detects flow and leakage

Once a serv-Clip connector has been installed, its G¾-in. port accommodates a wide variety of measuring devices. BKM Machine also offers its fluid-Check sensors, which screw into the serv-Clip port. The fluid-Check sensors measure flow rate and leakage and come pre-programmed for lpm or gpm output. The measuring cycle takes 9 seconds the calorimetric principle. This technology uses a sensor head to measure minute temperature differences in the oil medium on an applied heat load. The cooling and heating time of the tip correlates to the actual oil flow rate. When used as a leakage sensor, fluid-Check can measure flow rates as low as 0.02 lpm (0.0053 gpm); when used as a flow sensor, it can handle up to 600 lpm (158 gpm).

Serv-Clip is available in North America from IC Fluid Power, Rossford, Ohio. For more information, call (877) 423-5843 or visit

Download this article in .PDF format
This file type includes high resolution graphics and schematics when applicable.

Continue Reading

Handbook Simplifies Advanced Aspects of Mobile Hydraulic Controls

May 10, 2017
Author Brendan Casey lays out his hydraulics know-how that he acquired over 27 years in a simple handbook made for people that want to improve their skills in troubleshooting ...

Kidney loops: They aren't just for hydraulics any more

Sept. 1, 2004
When was the last time you changed the oil in your refrigerator's compressor? That was a question posed to me by Ken Stofen of Racine, Wis. The answer, of course, is never, and...

Sponsored Recommendations


May 15, 2024
Production equipment is expensive and needs to be protected against input abnormalities such as voltage, current, frequency, and phase to stay online and in operation for the ...

All-In-One DC-UPS Power Solutions

March 13, 2024
Introducing the All-In-One DC-UPS, a versatile solution combining multiple functionalities in a single device. Serving as a power supply, battery charger, battery care module,...

Motor Disconnect Switches

March 13, 2024
With experienced Product Engineers and Customer Service personnel, Altech provides solutions to your most pressing application challenges. All with one thought in mind - to ensure...

DC Power Solutions: Streamlined Power Supplies for Every Need

March 13, 2024
CBI All In One UPS Power Solutions combine the requirements for several applications in just one device which can be used as power supply unit, battery charger, battery care module...