Document 1gLjL6OvJJkVdJEEM0QK9a8NK

5 OKT '95 14:49 ABD00023917 S4 PRODUCT MANUAL PM - BBC FmEROLg_K.M=gBAL SPRAY-RINSE VALVE Introduced In 1973 by Fette.olf, Spray-Rinse Valves were first used as a means to wash loosely handing residue from the walls of PVC (polyvinyl chloride) reactors. Simple spraying systems with open-end nozzles could not be utilized due to the formation of solid polymer within the nozzle thereby cloggine it during the reaction. The Fetterolf design features a seal between the reactor atmosphere and the spray orifices thereby rendering them clog-free. Further, during the entire reaction they are submerged in a protective \ bath of the spraying fluid. Benefits to users were immediately evident: -- l.Leee downtime for manhole cover removal and and preparing the reactor for the next batch-- higher product 1 on,-reverue,-profit. 2.Protection from VCM gas emissions which U.S. governmental agencies, CSHA and its medical wing, NIOSH, later declared to be suspect in the development of liver career. Eventually, standards for reactor gas volume releases were established and Closed Reactor Teciniques demanded, In short, internal cleaning became a "must" to enable the facility to continue production. But it must be warned, the nternal cleaning between each batch may not be the total answer. E'ifferlng recipes produce different products with different adhesive characteristics. Frequently, ( supplementary high-pressure cleaning procedures must be employed at intervals ranging from ten to one thousand batches, ^ As the pollution standards of the U.S, were recognized and adopted in other parts of the wjrld, so did the reputation of the Fetterolf Spray-Rinse Valve spread. Currently It Is standardized In plants representing approximately 95% of the PVC production in the U.S.A Overseas, we reference lrstallationa on every continent and with every major process licensor. Aside from PVC, the Fetterolf Spray-Rinse Valve has been successfully utilized for reactors in the production of SBL (styrene-butadiene latex), EPS (expanded polystyrene), Neoprene rubber, Nylon ard classified polymer films. This manual is prepared to assist our customers and customers-to-be in the best choi-re of hardware and to serve as an introductory training manual for Fetterolf personnel. Afdy Ritter President (retired) FETTEROLF TECHNOLOGIES INT'L 25 OKT '95 14:49 ABD00023918 S. 5 / FETTEROLF SPRAY-RIKSE VALVES MODELS At present there are two distinct models of the FETTEROLF RAM-SEAL SPRAY-RINSE VALVE* 1. The Fig. 9410 models (and the earlier 9412> are single-function designed. Connected to a water supply (159-250 psl), they are utilized to (i) wash the residue from the walls of the reactor and* In some plants* (2) to distribute a water or steam mixture of an antl-stlck agent through the same apertures. 2. The Fig. 9420 models are dual-funet1 on designed. In addition to the wash-down service* a seconc Inlet and separate channel leads to atomizing spray nozzles through which is distributed the water mixture of an antl-stlck fluid prescribed in many process licenses. The secondary channel Is of considerably less flow capability to conserve the more concentrated solutions of anti-stick. rX 5 OKI '95 14:50 ABD00023919 s /s / OPERATING CYCLE 1. WASH MODE All models have Che same cycle In the wash mode. At the start of the opening stroke, water is forcibly directed downward in a solid 6tream to flush the heavy bottom residue toward the dram. As the spray apertures emerge from the oody of the valve, approaching the limit of stroke, separate sprays are directed outward and upward to provide cleaning by both Jet and cascading actions. At the end of the vertical opening stroke, the spray elements automatically shift into a continuous 360 degree rotation for whatever time period the process demands. Upon command, the valve will stop rotation and begin the ^closing stroke with the spray action reverse to that of opening: finishing wjth the solid stream directly downward just before complete closure with automatic fluid shu:-off. Until the next occasion for opening, the spray apertures remain sealed In a bath of fluid protecting them from clogging anc preventing any back-flow from the reactor into the fluid supply line. Depending on the valve size and aperture areas in the spray tube, capacities may be calculated from ;he standard formulae! G " Cv y'dp " or where: G = gal lons/mlnute (US) dP = pressure differential <in psi) L = 14.4 Cv /TT L Uters/minute nB pressure differential (in bars) For comparison* Cv - 5.0 for less) to 7.5 for 1" valve size Cv a 10 (or less) to 35.0 for 1-1/2" valve size _In all cases, the aperture areas may be characterized within the above limits to achieve the desired capacity within a given time span. \ 5 25 OT '85 14.50 ABD00023920 S. 7 // OPERATING CYCLF <cont'dl For application of the anti-stick fluid or vapor (Fig. 9420 models), the fluid supply line ta the Spray/Fog elements Is opened} the wash water supply line is closed. The cycle of the valve Is identical to that of the waen mode except the valve is now distributing the mist to the wais of the reactor for whatever time period is required. Due to wide variations in required capacities of different processes, it is necessary that the valve specifications 1nclude: a. Reactor pressure during anti stick application b. Anti-stick supply line pressure c. FluJd or vapor media d. Distribution rate:gal1onsCor liters) per minute Nonna)]y, the spray head Is fabricated to accommodate three fog-spray nozz)es*Two in use and the third Is plugged. Thus, it is an easy revision should the process require up to a 50% Increase In capacity. To decrease the capacity, orifice bushings of lesser size may be inserted. 2? UKT '95 14=51 ABD00023921 S.'8 J ACTUATION Automatic actuators guarantee the complete closure of the FETTEROLF Spray-Rinse Valve thereb/ effecting the necessary forces for seal-ring compression/expansion prior to the shut-down of the actuator. Further, these actuators provide the full and continuing 360 degree rotation of the spray-head. Listed below are driver options: 1. The Type EM is an electric actuator professionally made by Rotork for this specific application. It is an integral motor/gear reducer unit which provides the desired stem/spray-tube speed of ^rotation. A torque sensing mechanism automatically cuts off power to the motor on valve closure. A de-c1utch1ng feature permits emergency manual operation by disengagling tie motor and engaging a handwheel to give direct 1:1 ratio to the stem^spraytube. The actuator is waterproof and explosion-proof ~nd is best specified to Include complete electric controls: reversing controller, reset overload relay for each phase of power supply, space heater, low voltage control transformer, Integral pushbutton station and a selector switch to connect the actuator to either the local or a remote pushbutton station or computer which sequencer the wash program.2 2 The Type AM actuator cons sts of a Cast Air-motor with speed reducing gearbox to provide approximately 30 RPM to the stem/spray element. Since stalling is not damaging to an air-motor, the motor should be pressurized for several seconds after the closing stall to assure tight setting of the Ram-Seal ring. This can be accomplished with the use of an electrical time-delay mechanism to control the 4-way solenoid valve In the air supply line. Airsets consisting of a filter-regulator and lubricator are a must for trouble-free ^.performance hence are included. 5 OKT '35 14*51 ABD00023922 S. 9 j INSmiftTIQN FETTEROLF Spray-Rinse Valvefc are installed on the dome of the reactor. The use of two per reactc: affords multiple advantages* 1. The optimum prevention of "shadows" cast by the agitator shaft and internal baffles on the opposite reactor wall. 2. The creation of a third (vector) spray caused by the interfering two direct sprays results in cleansing of areas where neither of the two direct sprays may not reach. 3. The cleaning of each valve body by the spray from the other. 4. Three distinctly different spray patterns applied in sequence gives greater efficiency to the cascading effect. Since the valves are generally mounted on flanged nozzles or pads, such must be Identified as to size, pressure rating and code standard in the specification. A dimension important to the cleaning efficiency Is that shown as "P", the body penetration. Extensive testing and monitoring of close to 1,500 valve installations have determined that a body length of 24" or more beyond the reactor wall produces optimum results. In some 'instances where there may be no "idle" nozzles on existing reactors, a tee fitting may be installed atop a charging nozzle. This permits the Spray-Rirse Valve to occupy the "run" of the tee and the charge to be brought in through the branch, CAPACITY.CRITERIA The following general rules cS size choice apply* REACTOR VOLUME SIZE (two valves) To 14,000 gallons (53 m2> 14,000-40,000 (53-150 rr3) 1" 1-1/2"