NSEN is preparing for the annual heating season again.

The usual medium for district heating is steam and hot water, and multi-layer and metal to metal sealing is commonly used.

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For steam medium, we prefer to recommend the metal to metal sealing. Its advantage lies in the solid stainless steel sealing ring, which is more resistant to erosion and has a longer service life. At the same time, the replaceable sealing pair is adopted, so the valve can be maintained on site.

NSEN Can provide one-directional and two-directional sealing valve, the test pressure for non-preferred could reach nominal pressure.
Supply scope: PN16-PN63, DN100-2400
Recommend material: Body A105/WCB, Disc WCB, Shaft 17-4PH, Sealing F304+HF, Seat SS304

For the valve with hot water medium, multi-layer sealing can be selected. Compared with all metal seal, the torque of multi-layer will be smaller, which can save part of the cost for the actuator.

The following is a picture of the butt welding connection valve for central heating that NSEN shipped recently.