Cast iron swing type check valves, bronze seat or rubber seal, pressure rating PN 10/16, straight pattern, full bore, bolted bonnet, flanges acc. to DIN 10/16 and flange drilling acc. to DIN PN 10/16. Suitable for horizontal and vertical (upward flow) installation. Model 83GU has a rubber seal. Application area: cold and hot water, fresh and seawater.