GENERAL Pflow Series 21 Vertical Lifts move materials between two levels. Principal components are guide columns, carriage and hydraulic actuating mechanism. APPLICATION DATA Please specify your application requirements: Lifting Capacity:____lbs. Carriage Size:____"W x ____"L____"H Vertical Rise:____'____" NOTE: Series 21 Vertical Lifts are available with: Lifting capacities to 6,000 lbs; Carriage sizes to 10' x 10'; Vertical rise to 22'. Standard travel speed is 24 fpm. Travel speeds up to 35 fpm are available on special order. STRUCTURE Guide columns are 6" wide flange. Carriage is fabricated of 4" or 6" structural members with steel deck plate. Other deck surfaces can be supplied. Carriage is available in straddle or cantilever styles. OPERATION Carriage is lifted and lowered by two hydraulic cylinders mounted on guide columns. Cylinders are actuated by a remote mounted hydraulic pump. Transmission of the lifting force is through roller chain attached to the cylinders and carriage. A torsion bar links the two cylinders to equalize the load and insure carriage remains level at all times. ELECTRICAL Standard power requirements are 208V/ 230V/460V, 3-phase. Control voltage is 24V. Control stations and remote mounted control panel are NEMA 12. Control stations, provided for each level, include self-maintaining, push buttons with mushroom-head E-Stop button.

SAFETY FEATURES Optional DeckLocks automatically lock carriage at the upper level to eliminate drift or bounce. DeckLocks provide support to 15,000 lbs. in case of overload during loading/unloading and automatically raise carriage slightly before descent to sense overload. Carriage will not move if loaded to more than 110% of rated capacity. Overtravel is prevented by positive mechanical stops. Safety cams prevent uncontrolled descent in case both chains break. Velocity fuses prevent uncontrolled descent in case of hydraulic hose rupture. NO RIDER signs are posted at each point of operation. CARRIAGE & SAFETY ENCLOSURES Carriage is equipped with safety rails on non-operating ends and safety chains or diagonal drop bars on operating ends. Optional expanded metal or sheet metal carriage enclosures are available. Mandatory safety enclosures provide guarding on all sides of lift. Enclosures consist of minimum 8' high material that rejects a ball 3/4" in diameter. Gates (provided for access during loading/unloading) are electrically and mechanically interlocked with carriage movement. Interlock prevents a gate from being opened unless carriage is at designated level and prevents carriage movement if any gate is not fully closed and locked. CODE GUARANTEE Pflow vertical reciprocating conveyors (VRC) are covered by the ANSI/ASME B20.1 code. Pflow Industries has over 9000 vertical lifts installed in 50 states -no Pflow unit has ever been shut down for lack of elevator code compliance. We guarantee that should your Pflow VRC be sited for lack of elevator code compliance - Pflow will help you solve the conflict or repurchase the equipment at your full purchase price.

SUBMITTALS Pflow Industries provides general arrangement drawings detailing your specific application including plan and elevation views with dimensional information, equipment specifications, and guarding requirements. An Owners Manual with complete parts list, recommended spare parts list, maintenance instructions and troubleshooting guide is also provided. INSTALLATION Comprehensive installation instructions and electrical schematics are provided for proper installation of Pflow vertical reciprocating conveyors. Pflow will also provide technical support so that equipment is properly installed and guarded per ANSI/ASME B20.1 to ensure safe, efficient operation. STRADDLE CARRIAGE Pflow lifts are normally designed to be loaded/unloaded from the front or back (between columns). With Pflow straddle carriages, the support columns are placed on either side of the carriage. Straddle configuration balances the load on the carriage and keeps column loads essentially in compression. Loads on guides and rollers are minimal. CANTILEVERED CARRIAGE If required by application, the carriage can be cantilevered to allow loading/unloading from the side. With cantilevered carriages, the support columns are placed on one side of the carriage to allow loading/unloading at 90° angles. This requires heavier structure and guide wheel components. Carriage size and capacity are limited by the unbalanced load condition. With large carriages or high capacity applications, the carriage thickness is increased thereby requiring a deeper pit for proper installation.

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