Pressure transmitters and pressure gauges could be adapted to almost any process condition using valves, protective devices and/or fittings. WIKA offers such combinations in the form of a ?hook-up?, an application-specific and ready-to-install solution. It eliminates all of the disadvantages that users experience with the alternative of doing the assembly themselves.
1. The logistical effort:
That is considerable. Measuring Slaughter , valves along with other accessories, if they are brought together in-house, usually should be sourced from different manufacturers, frequently from a lot more than two companies. The order processes need to be coordinated, which can be time-consuming. Furthermore, supplier management requires additional resources.
2. Compatibility problems (threat of leakage):
Combinations of pressure measuring instruments with instrumentation valves and accessories are not standard solutions. Both components of this assembly generally come, as stated, from different manufacturers. This escalates the likelihood of complications during assembly.
The difference in these measuring arrangements with differential pressure gauges is obvious ? on the left, a good example of an assembly created by the operator themselves, on the right, the hook-up solution from WIKA.
An example of this, shown here, is the combination of a differential pressure gauge with a valve manifold. The bond of the measuring instrument includes a different centre distance than that of the selected valve manifold (picture left). When this happens, the connection may be accomplished through an assembly with two pipe pieces and four adapters. But this solution escalates the outlay in time and expense, and also the threat of leakage, by doubling the sealing points (see arrow marks). Difficulties in assembly also arise if the tolerances of the bond interfaces from different suppliers do not match exactly. This also carries the risk of leakage. In order to achieve the desired compatibility, the qualification and delivery specification must be defined for each supplier with considerable effort.
Two types of hook-up solutions:
Left: Pressure gauge with overpressure protector, a valve to separate the measuring instrument from the procedure and a siphon tube that protects the entire measuring arrangement from excessive temperatures.
Right: Pressure gauge with overpressure protector and monoflange (this enables separation of measuring instrument and process in the case of flange connections).
3. The installation effort:
On top of the requirements for the procurement of suitable components, will be the assembly costs for measuring points with instrumentation valves and accessories also added. These range from the development of special know-how and employee training to the provision of the right workplace, including tools and the necessary materials. Furthermore, an excellent control is mandatory to check on the functionality and reliability of the measuring arrangement, especially its leak tightness. This is especially important if, for example, this can be a process with critical gases.
Avoidance of risks
With a hook-up solution, users circumvent the efforts and potential risks described here. The measuring arrangement is assembled at WIKA (based on the specified process parameters and the installation situation) from qualified individual parts and is tested for leaks. It is ready for installation in the process on delivery. If necessary, a measuring instrument can even be coupled with several instrumentation valves and accessories (see illustration left).
Note
Detailed home elevators valves and protective devices can be found on the WIKA website.