General Specifications
Type 6140 check valve is available with soft or metal sealing. The dimensions range from DN 40 to DN 400, with pressure ratings of PN 10, PN 16, and PN 25. The valve is constructed from steel or stainless steel, with seat materials including NBR, EPDM, FPM, and PTFE, each with specific maximum temperature ratings. Flange connections are available in PN 10, PN 16, and PN 25.

Options
Optional dimensions extend up to DN 600, with pressure ratings up to PN 40. Additional materials include aluminum, aluminum bronze, or brass. Flanges can have grooves in the bearing surface, with flange connections available in PN 6 and PN 40.

Material Description
The valve features a reliable and simple construction, self-aligning between flanges, and is lightweight due to small face-to-face measurements. It is easy to mount with an eye bolt on top, offers a large field of application due to many options, and has a disc and hinge cast as one. The O-ring is protected within the body to prevent flow, detachment, and tear.

Dimensions and Performance
The document provides detailed dimensions and performance data for various nominal diameters (DN), including weight and kv-values. For example, a DN 40 valve weighs 0.8 kg with a kv-value of 17.2 m³/h, while a DN 400 valve weighs 55.0 kg with a kv-value of 5,203.0 m³/h.

Pressure Drop and Opening Pressure
The opening pressure varies with the degree of valve opening and flow direction, with specific values provided for DN 40-150 and DN 200-400. A pressure drop diagram is included, showing the relationship between pressure drop and water flow at 15°C. The document provides a formula to calculate equivalent water flow for fluids other than water.

Contact Information
DVC International, Ferrarivej 14, DK - 7100 Vejle, Tel.: +45 75 800 690, Fax: +45 75 800 691, E-mail: [email protected], Web: www.dvc.nu