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Flap Valve "Flapper" Diaphragm Pumps - 4 Pages

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Catalogue excerpts

Flap Valve “Flapper” Diaphragm Pumps The Yamada “Flapper” Pump is designed to pump fluids containing containing solids The Yamada “Flapper” Pump is designed to pump fluids solids up to 2 2 inches (50mm) in diameter. the foundation of the NDP up to inches (50mm) in diameter. Build on Build on the foundation of the NDP series line ofof pumps, the “Flapper” Pumps feature Yamada’sstallseries line pumps, the “Flapper” Pumps feature Yamada’s patented patented stallfree/lube-free air valve and rugged, easy-to-service bolted construction. free/lube-free air valve and rugged, easy-to-service bolted construction. Designed for durability in the field, the “Flapper” Designed for durability in the field, the “Flapper” Pumps’ innovative Pumps’ innovative flap-type check valve technology flap-type check valve technologywhile minimizing provides streaming passage of solids provides streaming passage of solids while minimizing clogging and downtime. Four external bolts release clogging and downtime. Four external bolts release valve covers on either side permitting service and valve covers on either side permitting service and maintenance without removing the maintenance without removing the pump pump from installation. from installation. Compressed air enters the left air chamber, moving the center rod to the left, forcing liquid out of the left liquid chamber, while at the same time drawing liquid into the right liquid chamber. When the center rod is fully to the left the pneumatic logic system switches the supply of air from the left air chamber to the right air chamber. The center rod then moves to the right, forcing out the liquid from the right liquid chamber, while at the same time the left liquid chamber. Through of this action a constant flow of liquid is achie

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Flap Valve “Flapper” Diaphragm Pumps Design Features Heavy-duty flap check valve permits passage of up to 30mm solids Easy access to valve chambers for ease of maintenance In-line maintenance facilitates servicing pump without removal from installation Top suction / bottom-discharge design keeps solids from settling in pump Vented diaphragm chambers alleviate problems associated with trapped air/gas Non-lubricated air valve Heavy Duty Flap Check Valve Outside-accessible air valve Bolted construction Short-stroke technology improves diaphragm life Modular pilot valve design requires no dynamic...

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Dimensions Intake & Discharge Ports Leading Competitor 2” Multi-port Flange with Rc or NPT Manual Override Lubrication Required None Liquid Side In Place Clean Out Ports Flapper Mating Surfaces Yes - can do flapper/seal assembly maintenance without pump removal Rubber / Rubber (no gaskets / o’rings) Raised angled seat compensates for normal Flapper Seal wear and faster seating of flap valve Flow Through Ports None - must be removed from service Rubber / Metal (with gaskets) Once worn, will not seal 90 degree turns lead to clogging Short stroke technology for longer Over stressed diaphragms lead...

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Flap Valve “Flapper” Diaphragm Pumps Performance Curve Specification Model No. Model Port Size Intake Liquid Discharge Supply Air Exhaust Air Supply Pressure Rc3/4” or NPT3/4” includes ball valve Rc1” or NPT1”w/silencer 0.2-0.7MPa Maximum Discharge Pressure 0.7MPa Discharge Volume Per Cycle 2.4L Maximum Size Solid 30mm Maximum Dry Suction Lift 4M Net Weight 52.0kg Body Aluminum (ADC12) Flap Valve HNBR (SPCC*) Valve Seat HNBR (SPCC*) Valve Guide Aluminum (intergral type) Center Disk A5056 *Material of the insert Your Local Distributor: International Department No.1-3, 1-Chome, Minami-Magome, Ohta-ku,Tokyo...

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