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.
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
- 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
- Built-in pressure relief valves
- Compact design offers high capacity per square foot
- 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.
| Capacity @100psig
| Maximum pressure (psig) @ stated Hp
| Weight in lbs.