5720 Serisi

Model 5720 metering pumps are of hydraulically actuated non-lost motion (amplitude modulated) diaphragm design. The unique method of actuation by means of a rotating plunger provides smoother, quieter operation, and the design characteristics minimize back lash and shock loads to the process system. Models 5720 are among the longest lasting pumps in the industry, provide reliability in the heaviest workload environments such as mining, nuclear plants, power plants and refineries/petroleum applications, and meet API 675 standards.

The model 5720 offers maximum capacities from 20 gph (max. pressure of 940 psig) to 127 gph (max. pressure of 170 psig). The pumps are available with up to five stroking speeds and all models may be duplexed. While the pump is running or stopped, the stroke length may be manually adjusted from 0 to 100% using the micrometer control, which moves an internal shift ring. The unique spring-loaded rotating plunger is always extending or compressing; it displaces hydraulic fluid through the hollow centre of the drive shaft and flexes the diaphragm for smooth, reliable performance. Repetitive accuracy is ±1%. Oversized main bearings support the drive shaft across a very short span, maximizing mechanical efficiency. An independent speed reducer allows two separate oil reservoirs: low viscosity oil for the hydraulic system and lubricating gear oil for the gear drive. A rugged cast iron housing contains the rotating plunger submersed in an oil reservoir.

Key features

• Operating pressure up to 940 psig
• Simplex or duplex construction
• Two separate oil reservoirs (hydraulic system and gear drive)
• Cast iron housing
• Micrometer stroke length adjustment for accurate capacity control of 0-100%
• Power supply: 120 VAC single phase or 230/460 VAC 3-phase TE or XP motor
• Built-in pressure relief valve
• Compact design offers high capacity per square foot of space
• High mechanical efficiency reduces power requirements
• Options: double diaphragm system, electronic or pneumatic capacity control, high suction lift head for up to 16 ft suction lift