Shut-Off, Control and Safety Valves
Balancing and Line Regulating Valves
Balancing and line regulating valves set how much coolant passes through each riser. Without them the flow takes the shortest path, nearby racks are over-supplied and distant ones stay warm. This group holds 42 items and consists mainly of needle valves: fine-adjustment versions in DN 4 with G 1/4 and G 3/8, and DN 8 needle valves with Rp/R 3/8 and Rp/R 1/2 as female, male and mixed thread versions. Panel-mount versions and a compact flow control valve complete the range.
A needle valve meters through a tapered plug, which gives a fine and repeatable setting but does not seal tight. Isolation and balancing therefore belong to two separate valves. Everything in this group is brass or nickel-plated brass, which a water-glycol circuit only tolerates where the material pairing stays consistent throughout; mixing copper alloys with stainless steel invites corrosion. Brands: Riegler, Fluidics equipment and Sang-A.
- 13 items
- 3 manufacturers
- Net prices plus VAT
Buying guide
How to choose Balancing and Line Regulating Valves
What matters when choosing: properties, comparison and typical applications.
How to choose a regulating valve
Metering devices compared
Needle valve, fine-adjustment valve and flow control valve
| Criterion | Needle valve DN 8 | Fine-adjustment needle valve DN 4 | Compact flow control valve |
|---|---|---|---|
| Duty | set the riser flow rate | meter small flows precisely | throttle supply and exhaust flow |
| Connections in stock | Rp/R 3/8, Rp/R 1/2 | G 1/4 and G 3/8, female and male | G 3/8 with 10 mm tube port |
| Material in stock | nickel-plated brass | brass | nickel-plated brass |
| Mounting | in line or panel | in line | in line |
| Tight shut-off | no | no | no |
Typical applications
- Hydraulic balancing of parallel rack circuits after commissioning
- Precise metering of small side flows, for instance to measuring points or bypasses
- Limiting the flow rate through individual heat exchangers and cold plates
- Fixing an operating point that the isolation valve does not disturb
- Adjusting balanced circuits from the cabinet front with panel-mount versions
- Throttling points in compressed air and control lines of the cooling periphery