Spirax Sarco DN25 DCV4 Disc Check Valve

Keep pipelines protected against costly backflow with the Spirax Sarco DN25 DCV4 Disc Check Valve. Engineered to sit neatly between standard ASME/ANSI flanges (Class 150 or 300), its compact wafer design saves valuable space without compromising on performance. The valve opens automatically under the forward pressure of fluid, then closes instantly via an internal spring the moment flow stops,stopping reverse flow before it has a chance to cause damage. Built to withstand demanding conditions, it handles pressures up to 725 psig (50 bar) and temperatures reaching 572°F (300°C), depending on the chosen seat material. From steam boiler inlets and condensate return lines to hot and cold water systems, industrial process lines, and HVAC heating, the DCV4 installs easily in horizontal or vertical pipelines and gets straight to work. For engineers who need dependable protection across steam, condensate, hot water, process liquids, and compressed gases, this valve delivers reliable, fuss-free flow control you can count on.

Summary: 

• Designed to be sandwiched between pipeline flanges to automatically prevent reverse flow of industrial fluids like steam, condensate, hot water, process liquids, and compressed gases
• Opened by the forward pressure of the fluid and immediately closed by an internal spring when forward flow stops—preventing backflow before it can occur
• Wafer design
• Fits between standard ASME/ANSI flanges (Class 150 or 300)
• Can be installed in horizontal or vertical pipelines
• Handles high ratings (up to 725 psig / 50 bar pressure and temperatures up to 572°F / 300°C depending on seat material)

Applications:

Commonly used in;

• Steam boiler inlets and condensate return lines
• Hot and cold water plumbing systems
• Industrial process lines and HVAC heating systems