• CSV..HP series: The operating assembly is     insulated from the outside by a gasket pack, including two multilayer     aramid‑fiber gaskets approved by DIN‑DVGW according to DIN 3535. The     operating assembly is removable to facilitate installation, and sealing     with the brass body is ensured by an HNBR O‑ring.
• RVV..HP series: The spindle is insulated from     the outside by a special sintered‑graphite gasket, which provides     exceptionally high sealing performance even at elevated temperatures.
• VHU..HP series: The spindle is insulated from     the outside by a gasket pack, including two multilayer aramid‑fiber     gaskets approved by DIN‑DVGW according to DIN 3535.

For the CSV..HP and VHU..HP series, it is essential to respect the flow direction indicated on the valve body. For all series, the installation position may be chosen freely according to system requirements.

Screw valves of the CSV..HP, RVV..HP, and VHU..HP series are classified as “Pressure accessories” under PED Directive 2014/68/EU, Article 2, paragraph 5. The entire product range is suitable for use with refrigerant R744 (CO₂), classified in Article 13, paragraph 1(b) of the PED Directive as a Group 2 fluid — non‑toxic, non‑flammable, and non‑explosive — and listed as A1 class in Annex E of EN 378‑1.

According to Directive 2014/68/EU, the hazard classification of the product depends on:

For the CSV..HP, RVV..HP, and VHU..HP screw valves, internal nominal diameters (DN) range from 2.5 mm for the smallest models up to 5.5 mm for the largest versions. Maximum operating pressures, as specified in the technical tables, do not exceed 130 bar for both series.

In accordance with Table 7 of Annex II of PED Directive 2014/68/EU, all products fall within the scope of Article 4.3.