Novus DN65 Black Steel Manifold
DN65 Black Steel Pipe Manifold is a black steel pipe manifold made from a DN65 header (65 mm internal diameter), with a project-specific length and branch layout. At a water velocity of 1.0–1.5 m/s it is suitable for flow rates of 11.9 – 17.9 m³/h and heat outputs of 278 – 417 kW at ΔT = 20 K. Branch sizes, outlet directions and connection type are specified with the order.
Technical Specifications
| Specification | Value |
|---|---|
| Body size | DN65 |
| Approx. inner diameter | 65 mm |
| Recommended flow rate (v = 1.0 – 1.5 m/s) | 11,9 – 17,9 m³/h |
| Approx. thermal capacity (ΔT = 20 K) | 278 – 417 kW |
| Body length | Project-specific (to your drawing) |
| Branch sizes | ½" · ¾" · 1" · 1¼" · 1½" · 2" · 2½" · 3" · DN80 – DN150 flanged |
| Outlet connection | External thread, internal thread, weld end, union, flanged or with valve |
| Operating temperature | 110 °C heating lines (closed loop) |
| Pressure rating | PN 10 – PN 16 |
| Material | Black steel pipe (sandblasted + painted) |
| Manufacturing | Novus Energy – custom-made for your project |
What capacity is a DN65 manifold suitable for?
With a body inner diameter of 65 mm, the cross-sectional area is 0.0033 m². Using Q = A × v × 3600, the recommended flow rate is 11.9 – 17.9 m³/h; using P = Q × 1.163 × ΔT, the thermal capacity at ΔT = 20 K is 278 – 417 kW. If ΔT in your heating circuit is 15 K, capacity drops by about one quarter.
Number of branches suitable for this body
The cross-sectional area of the manifold body is selected to be at least 1.5 times the total cross-sectional area of the branches. Under this rule, the upper limits for a DN65 body are:
| Branch size | Recommended max. quantity |
|---|---|
| ¾" (DN20) | 7 pcs |
| 1" (DN25) | 4 pcs |
| 1¼" (DN32) | 2 pcs |
| 1½" (DN40) | 1 pc |
| 2" (DN50) | 1 pc |
Values are based on the cross-section rule only; the exact number depends on the center-to-center spacing, valve/fitting width and body length.
Connection and end options
Outlets can be made with external thread, internal thread, weld end, union, flange or valve; different types can be combined on the same body. The body ends are closed with a blind plug, dished cap, flange, weld end or thread. On request, ball/butterfly valves, pressure gauge/thermometer sockets, a drain valve, an air vent connection, feet and brackets are added.
Made to measure
For the DN65 header, the length, number of branches and center-to-center spacing can be produced in any combination. When you select the dimensions in the manifold configurator, a dimensioned A4 technical drawing, a 3D model and a quote summary are generated instantly; you can also send your drawing via WhatsApp to get a price and lead time.
Related sizes: DN50 black steel pipe manifold · DN80 black steel pipe manifold · all black steel pipe manifold sizes · selection guide
Frequently asked questions
What capacity is a DN65 manifold suitable for?
A DN65 body suits a flow rate of 11.9 – 17.9 m³/h at a water velocity of 1.0–1.5 m/s. Assuming ΔT = 20 K, this corresponds to a thermal output of about 278 – 417 kW — roughly a heating plant for 34 apartments. At other ΔT values, capacity changes in direct proportion.
What is the price of the DN65 Black Steel Pipe Manifold?
The price is project-specific, as it is calculated from the body length, number and size of branches, connection type, pressure rating and options. Send us your dimensions and we will get back to you with the price and lead time.
Do I specify the body length and number of branches myself?
Yes. Length, number/size of branches, outlet directions and center-to-center spacing are all made to your drawing. You can make your selections in the configurator and print an A4 technical drawing.
Last updated: September 20, 2026 · Prepared by: Novus Energy engineering team — manifold fabrication and metering systems. To verify dimensions and capacity, contact us via WhatsApp or at +90 216 642 42 66.