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PD 71

Metering pupms

with eccentric movement

Plunger Metering Pump with eccentric movement, spring return and flow regulation with manual control or servo-assisted.
The PD 71 plunger metering pump has been designed and constructed to meet the most varied metering demands of liquids and chemical reagents.
This pump features simple and tested operating principles, yet it does not forgo the high metering precision that characterises all Sodi Scientifica pumps.
Its sturdy and compact structure assures high performance in heavy duty applications and makes its maintenance very straightforward.
Available in two main versions, with head and valve body in PVC and in AISI 316 stainless steel.

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Data sheet

Asynchronous Motor type MEC 71 B4 B5 Tropicalized
Standard three-phase 400 V 50Hz or 400 V 60Hz power supply
Gear motor in oil bath
Eccentric crank mechanism with spring return
Protection level IP 55

Nominal Performance

Max flow rate(1) (2) l/h 65 130 130 190 200 270 400 430 640
Max press bar 16 16 12 10 6 8 8 6 8

Construction features

Stroke length 25 mm
Plunger DN, mm 35 35 50 35 63,5 50 50 63,5 63,5
Strokes / 1′ (SPM) 45 90 45 135 45 90 135 90 135
Connections A/M Fig 1 Threaded – Gluing 1/2″ – 20 3/4″ – 25 3/4″ – 25 3/4″ – 25 3/4″ – 25 3/4″ – 25 3/4″ – 25 3/4″ – 25 3/4″ – 25
Connections A/M Fig 2 Flanged EN 1092-1 PN 10/16 20 25 25 25 25 25 25 25 25
Valve typee Single sphere; Double sphere (only PVC); Single sphere with Aisi 316 spring (only PVC valve body); High viscosity
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Construction materials

Head and valve body PVC; AISI 316 stainless steel
Valves Glass; Ceramic; AISI 316 stainless steel; PTFE
Plunger AISI 316 stainless steel; Ceramic
Seals FPM (Viton®); EPDM
Pump body Light alloy
Painting RAL 6011 Nitrosynthetic enamel

Flow regulation

Manual regulation when stationary or in motion with automatic regulation option. Theoretical 0-100%, Useful 10- 100%. Plunger stroke length is regulated through a manual rotation of an adjustment knob. The analog indicator shows the pump’s instantaneous flow rate. A PWM (Pulse Width Modulation) system also makes it possible to modulate metering and assures integration of this pump into more complex systems, typical of the industrial sector.

Accessories on demand

A number of accessories are available on demand, such as, just to name a few, self-regulator with 4-20 mA signal, high foot support, injection valve, flexible hose etc.

Weights and dimensions

Net weight kg 14,30 – 14,70    /    17,70 – 18,10
Gross weight kg 16,30 – 16,70    /    19,70 – 20,10
Packaging dimensions mm 550x480x360
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