BVS Series Standard Features - Plasticair

BVS Series Standard Features - Plasticair

By-Pass Venturi System About perchloric acid exhaust systems Perchloric acid presents a severe corrosion problem to materials such as epoxy coated mil...

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By-Pass Venturi System About perchloric acid exhaust systems Perchloric acid presents a severe corrosion problem to materials such as epoxy coated mild steel, 304 and 316 stainless steel. The most effective materials to fight corrosion attack from perchloric acid are PVC and FRP as described in this bulletin. Perchloric acid also has the unique property of becoming explosive when dried and crystallized. The results of this potentially explosive safety hazard require perchloric exhaust systems to incorporate flushing rings every 6 feet. The entire exposed surface of the duct system must be kept wet at all times.

BVS Series Standard Features

General The Plasticair By-Pass Venturi System is one of two solutions for safely exhausting perchloric acid. The system effectively removes the exhaust fan out of the potentially explosive gaseous stream. The inner PVC spray nozzles ensure the inner surface of the Plasticair By-Pass Venturi System is maintained in a wet state at all times. A molded smooth corrosion barrier is also very important to ensure that nesting of perchloric does not take place in crevices within the System. Blower The industrial blower is constructed of carbon steel and is epoxy coated. The inlet is supplied with a safety screen and the impeller is of a radial blade design. Also supplied are full belt guards, shaft guards, motors and V-belt drive sets. The blower can be ducted for inside or outside air and can be located to suit the designer’s convenience. Interior Venturi Duct The venturi duct is designed to induce a draft, and is constructed of FRP material. PVC spray headers are situated to guarantee a wet inner surface throughout the By-Pass System. A rigid 900 FRP duct extension is fabricated into the inner duct just below the venturi section to lead to the steel blower. The inlet of the inner duct is flanged for connection to the rest of the ducting system. (The Venturi By-Pass system can also be used for exhausting acids other than perchloric. For those systems spray nozzles are optional). Outdoor Exterior Duct (Optional) The exterior duct is constructed of UV stabilized FRP. The outer shells main function is to protect and insulate the system. A layer of fiberglass insulation is applied between the outer duct and the inner duct to maintain the necessary temperature for the spray system to operate and eliminate the possibility of freezing. A solid FRP roof curb cap, and guide wire support can be supplied for a quick and reliable installation. Spray System The spray system is simple and reliable. The PVC piping is heavily strapped by FRP lamination. The PVC spray nozzles operate at 40 PSI and will require a flow of 1 - 15 gpm per nozzle.

Options and accessories • • • • • •

Spring isolators Flanged outlets Blower outlet Dampers Arrangement #4 blowers Flexible PVC duct connection for blower outlet Additional venturi outlet stack height

Air Performance Blower HP Model BVS-6 BVS-7 BVS-8 BVS-9 BVS-10 BVS-11 BVS-12 BVS-13 BVS-14 BVS-15 BVS-16 BVS-17 BVS-18 BVS-19 BVS-20

O.75 0.75 1.0 1.0 1.0 1.5 1.5 2.0 2.0 3.0 3.0 3.0 5.0 5.0 5.0

Induced CFM 0.25” S.P. 290 390 515 635 785 990 1175 1340 1580 1830 2080 2320 2605 2910 3230

0.5” S.P. 280 360 470 595 750 900 1100 1250 1475 1690 1910 2150 2425 2710 2955

0.75” S.P. 255 340 415 550 700 830 1010 1130 1335 1550 1740 1940 2210 2470 2670

1.0” S.P. 235 310 400 500 610 750 905 1040 1200 1400 1630 1795 2000 2240 2500

Page 14

1.25” S.P. 190 280 360 470 590 700 845 990 1165 1300 1480 1680 1905 2100 2330

1.5” S.P. 180 250 345 420 540 650 800 890 1050 1205 1375 1525 1710 1925 2110

1.75” S.P. 165 220 310 370 465 570 680 800 910 1050 1190 1340 1500 1670 1875

2.0” S.P. 145 200 250 325 400 470 580 670 775 905 1015 1140 1315 1420 1580

General Dimensions Dimensions: inches MODEL HEIGHT BVS-6 BVS-7 BVS-8 BVS-9 BVS-10 BVS-11 BVS-12 BVS-13 BVS-14 BVS-15 BVS-16 BVS-17 BVS-18 BVS-19 BVS-20

A 63 72 79 85 94 104 113 123 132 141 151 160 170 179 189

ID

OD

CURB

SQUARE

FLANGE

B 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

C 10 11 12 13 14 16 17 18 20 21 22 23 24 25 26

D 6 6 6 8 8 8 10 10 10 12 12 12 12 12 12

E 14 15 16 17 18 20 21 22 24 25 26 27 28 29 30

F 10.375 11.375 12.375 13.375 14.375 15.375 16.375 17.375 18.375 19.375 20.375 21.375 22.375 23.375 24.375

Page 15

OVERALL FOOTPRINT 60 X 40 60 X 40 65 X 45 65 X 45 70 X 50 70 X 50 75 X 55 75 X 55 80 X 60 80 X 60 80 X 60 85 X 70 85 X 70 90 X 80 90 X 80