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Unival® BUTTERFLY VALVES Attributes of Design - Wafer Series VF701 Data Sheets Manual Notch Plate; with position indicator and gear locking, lever locking in intermediate position when needed. Top Mounting Arrangement; top flange to suit actuators as per ISO 5211 standard, square stem with bevelled edges to ease actuator coupling. Marking according to EN19, with name plate including CE marking, valve identifi cation and serial number for full traceability purpose. Rugged and light Lever; Ergonomic design, trigger style with covered spring. Prepared for padlocking application to avoid undesired operation. One Piece Shaft; solid, stainless steel corrosion resistant. One piece through design ensures dependability and positive disc positioning. O-ring safety shaft sealing, with retaining washer to ensure proper working under pressure. Extended Valve Neck enables thermal isolation in heating plants. Finely Machined Disc Edges with fi nal polishing, provides tight valve sealing and ensures minimum operating torque and longer duration of the rubber liner. Precise Shaft Guiding System; the shaft is carried in four estrategically placed bushings preventing deflection under pressure, thus ensuring optimal guidance, positive location and long life. PTFE bushing accurate guidance reduces torque and isolates the stem from valve body, preventing stem corrosion. Precision Machined Body; thus the liner with shaft location can be accurately positioned to ensure minimal operation wear and extended life span. Epoxy powder paint protection Centring eyelets; series 700 provide full passing bolts to assemble between counter fl anges ISO / DIN / EN 1092 PN10/16 and ASA 150. Replaceable seat liner edge boot seat design, replaceable lined without need for special tools. Data subject to change without prior notice Shaft-Disc threaded union standard up to DN300: disc offers clean surface against the fluid, without union pins source of corrosion and turbulences in small sizes. 20
Unival® BUTTERFLY VALVES Parts and Materials - Wafer Series VF701 Data Sheets Manual Nº Part Material 1 BODY Cast Iron EN-JL1040 (GG25) / Ductile Iron EN-JS1030 (GGG40) / St. Steel A351 CF8M / Carbon Steel A216 WCB 2 DISC Nickel Plated Ductile Iron EN-JS1030 (GGG40) / St. Steel CF8M / Al-Bronze / FEP or PFA Coated / Uranus UB6 3 LINER NBR / EPDM / Viton / Hypalon / Silicon / PTFE / FEP / PFA 4 STEM St. Steel AISI 416 5 O-RING EPDM, NBR, Viton 6 BUSHINGS PTFE 7 WASHER Steel 8 CIRCLIP Steel 9 NOTCH PLATE Aluminium 10 HAND LEVER Alumminium / Ductile Iron 11 STUDS Steel 13-14 WASHERS Steel 15 WORM GEAR Ductile Iron Data subject to change without prior notice 21
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Untitled - COMEVAL

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