To extend the scope of services for wase water treatment plant surface scum handling, MARU developed its fully stainless steel Telescope Valve with level adjustable to regulate the level of water level and scum level in containment structures such as clarifier, sedimentation tanks, sludge holding chambers, tanks, ponds & Landfill lagoons. Also known as “Sludge Draw-off Valves” or “Decanting Valves”, the valve assembly consists of a lifting mechanism (operator), connecting Stainless steel stem and a slip (drain) tube which travels vertically inside a fixed vertical pipe (usually Stainless steel SCH40S grade). Utilizing the operator, the slip tube is raised or lowered to maintain the desired water level within the containment structure. MARU offers Telescoping Valves in either Rising or Non-Rising Stem designs for manual or motorised operation via SMART Actuator. This offers a variety of operators available such as, handwheel, rack & pinion, bevel gear and electric actuator operators. The upper slip tubes are available in a variety of sizes and materials, the most common materials being stainless steel 316 SCH 40. Other materials are available such as FRP upon application or request. Slip tubes are also supplied with V-notch, plain end or funnel tops. Scum baffles can also be added to the top of the slip tube, if requested. Additional seal elastomers also available upon request. Operator pedestals are available in Full Stainless steel 316/304 or cast ductile iron with Scum Removing Level Indication. Offset wall brackets are available in fabricated 316 stainless steel as standard. Lifting bails are fabricated from SS316 mounted to the slip tubes with stainless steel fasteners. Threaded rising operating stems and extension stems are made from SS316 or higher hardness SS431 Grade unless otherwise specified
