Water Flow Regulators Products(6)
RUMMEL›Rummel WFR 90 Water Flow Regulator
- Variable area measurement: the return water lifts the cone, flow is read directly
- 1–12 circuits, max. 720 L/h per circuit
- Up to 90 °C; the pressure limit falls with temperature from 8 bar to 4 bar
RUMMEL›Rummel RWFR120 Flow Regulator
- Up to 120 °C, water-contact parts in brass MS58, FKM seal
- Shut-off ball valve on supply and return of each circuit
- Variable area measurement, accuracy ±10% of full-scale value
RUMMEL›Rummel RWFR160 Flow Regulator
- Up to 160 °C, max. 15 bar operating pressure
- 8 measuring ranges from 0.7–2 L/min up to 12–28 L/min
- Scales burned into the sight glass, mounting in any position
RUMMEL›Rummel RWFR160 e-flow Electronic Flow Regulator
- Vortex piezoceramic sensor, no moving parts
- 1.0–18 L/min measuring range, integrated temperature measurement
- Up to 160 °C, max. 15 bar
RUMMEL›Rummel Flow Control Retrofit Kit
- Electronic monitoring without replacing the existing mechanical regulator
- Sensor unit with adapter tube set in place of the sight tube
- 1–20 L/min, up to 90 °C and 10 bar
RUMMEL›Rummel Parallel Distributor
- Up to 180 °C and 15 bar, hot water and heat transfer oil
- Connects the circuits in parallel and removes the pressure loss of hose bridges
- Brass or stainless steel, 2–12 circuits
What is a water flow regulator?
A water flow regulator is a device that distributes the medium coming from the mold temperature control unit or the cooling water line to the separate circuits of the mold and shows or measures the flow passing through each circuit. The temperature control unit produces the water at the right temperature; but on its own it cannot know how much of this water goes into which channel inside the mold. The flow regulator closes this gap: each circuit has its own indicator, its own valve and, where needed, its own sensor.
The products on this page are Rummel's range of flow regulators and parallel distribution. For the temperature control unit itself, see the mold temperature control systems page.
Why monitor the flow per circuit?
Mold cooling channels narrow over time with scale, rust and deposits. This narrowing does not happen all at once; the flow drops slowly over weeks. The mold zone where the circuit with the falling flow is located heats up, and the consequences appear one after another:
- The cycle time grows. The hottest zone of the part reaches ejection temperature late; the operator manages by extending the cooling time and the loss goes unnoticed.
- Warpage and dimensional deviation begin. The temperature difference between two zones of the mold leads to different shrinkage.
- Surface differences become visible. On parts made with hot molds, gloss and texture change from zone to zone.
- Scrap increases. The problem is often noticed only when the part is rejected.
If the circuits are connected in series, this diagnosis is even harder: the water passes from one channel to the next through a hose bridge, each bridge adds pressure loss, and both less and warmer water reaches the last circuit. With parallel distribution each circuit takes its water directly from the main manifold; which circuit has deteriorated is also visible exactly.
Mechanical indicator or electronic measurement?
The products in this category fall into three groups:
1. Regulators with mechanical indicator — WFR 90, RWFR120 and RWFR160. They work on the variable area principle: the flow lifts a cone or a float and the flow is read by eye. No electrical connection is needed. 2. Regulators with electronic measurement — RWFR160 e-flow and the Flow Control retrofit kit, which converts existing regulators to electronics. They measure flow and temperature by sensor, record them and send an alarm to the injection molding machine on deviation. 3. Parallel distribution without measurement — Rummel parallel distributor. It does not measure; its purpose is to feed the circuits in parallel, correctly and with short hoses. Sensors and valves can be added later.
Comparison
| Product | Max. temperature | Measurement | Circuit control |
|---|---|---|---|
| WFR 90 | 90 °C | Mechanical, variable area (cone) | Manual regulating valve |
| RWFR120 | 120 °C | Mechanical, variable area (float) | Ball valve |
| RWFR160 | 160 °C | Mechanical, variable area (float) | Ball valve |
| RWFR160 e-flow | 160 °C | Electronic, vortex piezoceramic | Ball valve |
| Flow Control retrofit kit | 90 °C | Electronic sensor, 1–20 L/min | Valve of the existing regulator |
| Parallel distributor | 180 °C | None (sensor can be added) | Ball valve |
Points to consider when selecting
Temperature and pressure must be assessed together. On the plastic-bodied WFR 90, the permissible pressure falls with temperature: the limit of 8 bar at 40 °C drops to 4 bar at 90 °C. On the brass and stainless RWFR models, the pressure limit is 10–15 bar.
The measuring range must suit the circuit. The normal flow should fall in the middle zone of the indicator. Small core and slide circuits are usually the first to clog; an indicator with a low range makes the drop in these circuits visible. The RWFR160 has eight ranges from 0.7–2 L/min up to 12–28 L/min.
Type of medium. Applications running on hot water up to 160 °C pair with water temperature control units, those running on heat transfer oil with oil temperature control units. The heat transfer oil version of the RWFR160 and the parallel distributor can also be used with oil.
Logging and alarm requirements. Where customer audits, batch traceability or unattended operation are involved, a mechanical indicator is not enough; electronic measurement is needed.
More circuits and automatic control
If your mold contains more than 12 circuits, if you want the flow to be adjusted automatically, or if you want to see all circuits on a single operator panel, electronic multi-circuit distribution systems are the next step. For general information on the brand, see the Rummel page.
As Rummel's representative in Turkey, Teknik Part works with you to determine the right model and measuring range from your number of circuits, temperature and flow data.