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5700 Series Cyclo/Phram

The Model 5701 metering pump is a hydraulically actuated non-lost motion (amplitude modulated) diaphragm design. The unique method of actuation by means of a rotating plunger provides smoother, quieter operation at less than 100% capacity. The sine wave characteristics minimize back lash and shock loads to the process system.

The Model 5701 is one of the most long lasting pumps in the industry. The pump will provide reliability in the most heaviest workload environments, such as mining, nuclear plants, power plants and refineries/petroleum applications. The 5701 meets API 675 standards.

Performance

The Model 5701 offers maximum capacities from 5.3 gph at a max. pressure of 2000 psig to 13.8 gph at a max. pressure of 400 psig. The stroking length can be manually adjusted from 0 - 100% and the pump is available in four stroking speeds of 29, 58, 117 and 175 SPM. All models may be duplexed.

While the pump is running or stopped, the stroke length may be manually adjusted from 0 to 100% by using the micrometer control. Internally, this moves a shift ring. A spring loaded rotating plunger is mounted to the drive shaft within the shift ring. When the shift ring is concentric to the drive shaft axis, the plunger rotates equal distance to the shift ring, resulting in zero reciprocation and consequently zero flow (figure 1-"zero pumping"). As the shift ring is moved eccentric to the drive shaft axis (figure 2-"pump 100% capacity"), capacity increases to 100%. The plunger is always extending or compressing, according to the degree of eccentricity, displacing hydraulic fluid through the hollow center of the drive shaft and flexing the diaphragm. Repetitive accuracy is +1%.

Oversized main bearings support the drive shaft across an extremely short span, maximizing mechanical efficiency and ensuring long life.

Materials of Construction

The Model 5701 is available with Polypropylene(max 150 psig), Alloy 20, Hastalloy C or 316 Stainless Steel wetted ends. All diaphragms and seals are available in PTFE, suited for the most chemical duty applications.

A rugged cast iron housing with high performance rotating plunger is submersed in an oil reservoir. The plunger is the only reciprocating part in the entire hydraulic drive mechanism.

Features

• A micrometer adjustment allows effortless capacity range of 0-100%
• Operating pressure up to 2000 psig
• Power supply - single phase or 3-phase TE or XP motor.
• Built-in pressure relief valves
• Compact design offers high capacity per square foot of space
• Double ball check valves
• High mechanical efficiency reduces power requirements

• AEI/API for electronic or pneumatic control
• Double diaphragm system
• Spring assisted diaphragm return allows for up to 16' suction lift
• DC drives with SCR control for proportional feeding in response to a standard electrical input signal.