Diaphragm pumps

Mechanical actuated diaphragm metering pumps has been designed for dosing liquids free or with very small suspended solid particles. Mechanical diaphragm type pumps are suitable when:
  Zero leakage is essential;
✓ Pumped liquid contains suspended solids particles.

The pump comprises of four basic sections: motor drive, gearbox, pump head and valves.
Pump head: pumping action is performed by a push rod pushing the diaphragm, which has a reciprocating movement within the pump head.
All parts are in direct contact with the liquid being metered. The sealing effect is achieved by rings of material suited to the liquid being handled.

D series
D series technical characteristics
MODEL FLOW RATE (l/h) MAX PRESSURE (barg) STROKES MINUTE Ø DIAPHRAGM STROKE LENGTH «Ø»VALVE PASSAGE MOTOR POWER (kW) THREATED CONNECTIONS STANDARD FLANGED CONNECCTIONS OPTIONAL (UNI / ANSI)
MAX MIN 3PH 1PH
D 18 18 2 8 34 110 mm 2 mm 5 0,18 0,37 1/4″ BSPf DN15/1/2″ 150 RF
D 35 35 4 8 71 8,5 3/8″ BSPf
D 50 50 5 8 106
D 85 85 9 8 150
D 40 40 4 8 34 4 mm
D 75 75 8 8 71
D 115 115 9 8 106
D 160 160 11 8 150
D 55 55 5 8 34 6 mm
D 110 110 11 8 71
D 180 180 13 8 106
D 250 250 25 8 150
D 70 70 7 5 34 170 3 mm 17 0,18 0,37 1” BSPf DN 25 / 1” 150 RF
D 155 155 15 5 71
D 240 240 24 5 106
D 340 340 34 5 150
D 150 150 15 5 34 170 6 mm
D 320 320 32 5 71
D 480 480 48 5 106
D 680 680 68 5 150
D 230 230 23 5 34 170 9 mm
D 500 500 50 5 71
D 700 700 70 4 106 0,37
D 1000 1000 100 3 150

Max flow rate data refers to test with water, ambient temperature of 25°C, height of 250m a.s.l., suction height of 1mt with rigid suction pipes. Values are valid for operation @50Hz.

Reminder: standard motor 230/400Vac, 50Hz; 275/480Vac, 60Hz • 3 phase; Class F, IP55,~1400 rpm

Optional power 3-PH motor: 0.37 kW

Maximum optional pressure 3-PH MOTOR: 8 (barg) (except D 1000).

Useful information when selecting dosing pumps:

Max flow rate, Max working pressure, chemical viscosity, temperature, area classification, suspended solids

DS liquid ends configurations
Wetted parts AACAVTVH
Pump headAISI 316LPPPVDFPVDF
Head connectionsAISI 316LPPPVDFPVDF
DiaphragmPTFEPTFEPTFEPTFE
Ball check valveAISI 316LGLASS PYREXPTFEHASTELLOY C276
Valve o-ringsFPMFPMPTFEPTFE
Valve seatAISI 316LPVCPVDF