Characteristics, special features
- easy and fast to install
- compact dimensions
- extensive range
- many combination possibilities

Basic material
Brass CW617N (CuZn40Pb2)

Chemical nickel-plating
Nickel: 88 - 89,5 %
Phosphorus: 10,5 - 12 %
Melting point: ca. +880°C
Degree of hardness: 450/500 Vickers

Thickness of the layer
Generally: ca. 7 µm
Exception: valve spindles ca. 2 µm

Nominal pressure PN
The nominal pressure PN is indicated in bar with a safety factor of 4 at static load and shown in the technical product tables for each individual diameter.

Temperature range
-40°C to +180°C

Leack rate with helium
10^-8 mbar • l/s
(when professionally assembed; see installation instructions and tubes)

Vacuum
Up to 10 ^-4 mbar, higher values are possible

Copper tubes to use
Seamless copper tubes (esp. EN 12449/ 1057) with clean smooth surface. Outside diameter of ± 0,1 mm.  All thin-walled copper tubes as marked * on the table in the appendix must be reinforced with stiffener sleeves.

Stainless steel tubes to use
Seamless stainless steel precision tubes (to DIN EN 10216-5/EN ISO 1127, tolerance class T4) with clean smooth surface. Outside diameter of ± 0,1 mm. Minimum quality of the surface: m, hardness ≤ HRB 80 ≈ HV 155.

Important!
Chemical nickel-plated unions can be used as a less expensive alternative to stainless steel in individual cases, but under no circumstances as a general rule. The working conditions (pressure, medium, temperature, environment etc.) have to be established for each individual application. To the extent required we recommend that you carry out your own tests beforehand, or that you consult us with indication of the exact working conditions.