- 1 - 7th edition No. SS2-8310-0600 OVERVIEW Model VPP08 valve positioner is designed to operate piston cylinder that require higher supply air pressure than diaphragm actuator. The positioner is a forcebalance servo-mechanism to position valve opening correctly and rapidly by bleeding or feeding air of a pneumatic-operated single acting actuator in accordance with a pneumatic signal from a controller. FEATURES 1) Compact, rigid construction makes it easy for adjustment and maintenance. 2) Changes in characterisitics can easily be made by changing cams. 3) Anti-corrosive materials are used for components, thus is suitable for sevice in bad operating atmosphere. SPECIFICATIONS Model Output characteristics: Linear, Equal percentage and Quick opening. Supply air pressure: 350 to 690 kPa {3.6 to 7.0 kgf/cm2} Air consumption: 20 Nl/min. (normal state, supply air pressure 490 kPa {5.0 kgf/cm2}) Maximum capacity of air flow: 250 Nl/min. (supply air pressure 490 kPa {5.0 kgf/cm2}) Pneumatic tubing connection: Rc 1/4 Ambient temperature: -30 to +80 °C Performance: Accuracy ; + 1% F.S. Dead band ; 0.5% F.S. Travel adjustable range: 14 to 100 mm VPP08 (1) Code (1) Input signal Full range 20 to 100 kPa (Standard) 1 Half range 20 to 60 kPa (Low range) 2 Half range 60 to 100 kPa (High range) 3 Additional specifications (by special order): Corrosion-resistant and silver finish (Semi-standard specification Y138): . Corrosion-resistant (Acryl baking) finish (Y138A) ; Resistance for corrosive gases. . Corrosion-proof (Epoxy baking) finish (Y138B) ; Resistance for corrosive liquids. . Silver-normal (Acryl baking) finish (Y138C) ; Protection for temperature rise of device caused by direct sun light, radiation heat, etc. . Silver-corrosion-resistant (Acryl baking) finish (Y138D) ; Protection for above-mentioned temperature rise and resistance for corrosive gases. Note) Silver finish is not applicable for alkaline gases. Weight: 3.5 kg Housing material: Aluminum alloy casting Finish: Acryl baking finish (For corrosion-resistant and silver finish, refer to the optional specification.) Color of finish: Dark beige (Munsell 10YR 4.7/0.5) Single Acting Type Pneumatic Valve Positioner For Higher Supply Air Pressure Model VPP08 7 18 Specifications are subject to change without notice. “This product is designed for general industrial use.”