Tilting Disc

Tilting disc check valves are used to prevent reverse flow in water, steam, condensate, gas, oil, and other industrial fluid systems. The disc opens under forward flow and returns to the seat as flow decays or reverses. Compared with conventional swing check designs, the tilted disc geometry provides faster and smoother closure, reducing slam and water hammer in pump discharge lines, high-pressure piping, and circuits with variable flow conditions.

This category includes wafer-type Zubi T113AR valves, Valvosider pressure seal check valves to DIN and ASME standards, and Fluitek bonnetless and pressure seal bonnet designs. Valve selection should be based on service medium, flow velocity, allowable pressure drop, cracking pressure, installation orientation, expected back pressure, operating temperature, leakage class, and maintenance requirements. In steam service, line drainage upstream of the valve should be verified to avoid condensate accumulation and impact loading on the disc.

Available configurations cover DIN and ANSI pressure systems, with nominal ratings from PN6 to PN420 and ASME Classes 150 to 2500. End connections include wafer pattern for flanged installation and butt weld ends. Body and trim materials include 1.0619, 1.4408, ASTM A216 WCB, ASTM A217 WC1/WC6/WC9, ASTM A351 CF8M, cast steel, low-alloy steel, austenitic stainless steel, AISI 316, and nickel alloys, allowing selection based on pressure-temperature rating, corrosion resistance, and media compatibility.

For compact installations at lower pressure, Zubi wafer designs cover PN6-PN64 and ASME Class 150/300, with sizes DN40-DN400 up to 40 bar and DN450-DN700 up to 25 bar. For higher-pressure duty, Valvosider pressure seal designs are available in DIN PN100-PN420 and ASME Class 600-2500. Fluitek pressure seal bonnet versions are specified for designs to ASME B16.34 or EN 12516 and are applied in high-pressure lines, typically downstream of isolation valves where rapid reverse-flow closure is required.