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Wafer Butterfly Valves

Wafer Butterfly Valves
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North American Wafer Butterﬂy Valves mize leakage, the valves are not recommended for service below 250 F. 1145 Valves have locking handles for manual operation. 1146 Valves for motorized control are available (through 30") with bracket and linkage for most standard control motors. Larger valves require remote mounted operators. Available in 3" to 30" pipe sizes. 1145-H (Manual) and 1146-H (Motorized) High Temperature Air Valves: Identical to the 1145/1146 valves except for combustion air* at the temperature range of (700-1200 F), these valves have larger clearance to prevent binding due to thermal expansion at much higher temperatures. Clearance changes with temperature, so valves will leak noticeably through the body/disc gap at lower temperatures. To minimize leakage, the valves are not recommended for service below 700 F. Available with all options that are offered with the 1145/1146. 1146 or 1156 Motorized Wafer Valve 1155 (Manual) and 1156 (Motorized) Valves, for combustion air* up to 250 F, are available in 3" to 30" pipe sizes. Available with all options that are offered with the 1145/1146. North American Wafer Butterfly Valves are rugged, lightweight, and used for controlling low pressure combustion air* flow. They sandwich between companion flanges with two locating holes on the valve body (ANSI Class 150 style for 3" to 14" ; RPM style for 16" to 42"). All wafer valves have stainless steel shafts; bodies and discs are heatresistant cast iron. All are suitable for inlet pressures up to 10 psig, provided differential pressures across valves, at high fire flow rate, are limited to 1 psi for 1145 and 1146 Valves, 2 psi for all others. No lubrication is required on 1145/46 and 1155/56. Seven types are available. 1136 Motorized Reduced Port Valves, for air or coke oven gas to 250 F, have a port diameter one size less than line size to facilitate proper valve sizing without the expense of reducing pipes at the valve. These valves feature self-cleaning discs and fittings for lubrication to clean and prevent sticking of internals with coke oven gas. 1136 Valves are available with bracket and linkage for most standard control motors. Available in 3" to 14" sizes. 1136 valves are not available for manual operation. 1145 (Manual) and 1146 (Motorized) Hot Air Valves, for combustion air* at temperatures from 250 F to 700 F, have adequate clearance to prevent binding due to thermal expansion. Clearance changes with temperature, so cold valves leak through the body/disc gap noticeably. To mini* Not for use with fuel gases. 1145 or 1155 Manual Wafer Valve Sizing. Full port wafer valves in lines of the same pipe size give increasing flow for a fixed pressure drop until they are about 60° or 70° open. At greater openings, flow dœs not increase appreciably, although pressure drop across the valve falls off rapidly--downstream piping or burners, not the valve, become the limiting resistance in the system. At 90° open, the valve's flow resistance is negligible--its pressure drop is practically zero, and it can be ignored in pressure drop calculations. For control sensitivity, wafer valves should be selected for maximum flow at not more than 70° o

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wafer VALVE CAPACITIES scfh at 1"wc pressure drop (70 F air) and 0.25 PSIG, upstream pressure inches open open open open ' TER VALVE LEAK RATES All leak rates evaluated with valve in closed position, and 0.25 PSIG pressure upstream. 1136/55/56 leak rates are evaluated at 70 F, those for 1145/1146 are at 250 F, while those for 1145/1146-H are at 700 F. SPECIFICATIONS / CONSTRUCTION Valve designation Maximum inlet pressure, psi Maximum temperature, F Body Disc Shaft heat-resistant stainless steel cast iron © For 1146-H Valves, consider specifying "1232 B & L" (for...

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Valve designation ANSI ANSI ANSI ANSI ANSI * All, except 1136. † 1136 only. ANSI = American National Standards Institute (formerly ASA) pipe flange size. RPM = Rivet Pipe Manufacturers' flange sizes. • Cored holes for flange bolts straddle centerline. ▲J = 127⁄16 for 1136-8. ■ J = 163⁄16 for 1136-9. Motor Mounted Direct to Val

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WARNING: Situations dangerous to personnel and property may exist with the operation and maintenance of any combustion equipment. The presence of fuels, oxidants, hot and cold combustion products, hot surfaces, electrical power in control and ignition circuits, etc., are inherent with any combustion application. Parts of this product may exceed 160F in operation and present a contact hazard. Fives North American Combustion, Inc. urges compliance with National Safety Standards and insurance Underwriters recommendations, and care in operation. Fives North American Combustion, Inc. 4455 East...

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