Rummel parallel distributor: in place of the standard water distributor
The Rummel parallel distributor is a modular distributor with ball valves that distributes the cooling and temperature control medium from a single main line to several mold circuits in parallel. This product has no flow measurement; its purpose is to set up the distribution itself correctly. As a compact and robust alternative to standard water distributors, it is used in hot water and heat transfer oil applications up to 180 °C.
Why does the parallel connection matter?
When mold circuits are connected in series with hose bridges, the water leaves one channel and enters the next; each bridge adds pressure loss, and the water reaching the last circuit is both reduced and warmed up. With parallel distribution each circuit takes its own water from the main line. The result: pressure loss falls, the flow per circuit rises and the temperature difference between the two ends of the mold becomes smaller. Because the circuits are separate, the location of a faulty circuit is also found precisely.
Placing the distributor close to the mold makes short hoses possible; short hoses lower both the heat loss and the installation cost.
Modular design
The parallel distributor should be seen not as a fixed catalog product but as a system built for the application:
- 2 to 12 circuits
- Brass (standard, solid bar) or stainless steel (compact) body
- Custom modular design with function fittings
- Option to integrate sensors and valves
- Different connection types and thread sizes
- Shut-off ball valves on supply and return
- Design insensitive to pressure surges
The option of integrating sensors and valves means that the distributor can later be extended with measurement and monitoring. It is possible to only distribute today and add measurement to certain circuits tomorrow.
Technical data
| Feature | Value |
|---|
| Max. temperature | 180 °C |
| Max. operating pressure | 15 bar |
| Material versions | Brass and stainless steel |
| Manifold supply/return connection | Optional female thread: 1/2", 3/4", 1", 1 1/4", 1 1/2" |
| Mold supply/return connection | Optional female thread: 3/8", 1/2", 3/4" |
| Medium | Hot water and heat transfer oil |
| Number of circuits | 2–12 |
How is the connection size selected?
On the manifold side, five thread sizes from 1/2" to 1 1/2" are offered. The main line diameter must be able to carry the total flow of all circuits; on a distributor with many circuits and high flow, a narrow main line restricts the flow reaching the circuits and cancels the gain of parallel distribution. On the mold side, the 3/8", 1/2" and 3/4" options are determined by the connection size on the mold.
When a parallel distributor, when a measuring model?
If the flow per circuit has to be visible or recorded, look at the measuring models: the RWFR120 and RWFR160 for mechanical monitoring, and electronic multi-circuit distribution systems for electronic monitoring. For circuits that run with an oil temperature control unit, you will find the unit side on the oil temperature control units page.
