Doxa Series

four models for capacities ranging from 20 to 600 l/h, with pressures ranging from 10 to 25 kg/cm², suitable for all types of liquid
continuous adjustment of piston stroke length, i.e. of capacity, from 0 to 100%, while the pump is at rest or running
piston stroke length adjustable from 0 to 24 mm
metering accuracy better than 1% within the normal operating range of 10 to 100% of capacity
maximum temperature of the pumped liquid:
- 150°C with metal pump heads
- 50°C÷70° C with pump heads made of PVC or PP

NPSH required 0.3÷0.4 kg/cm² abs. at normal operating conditions
groupable in multiplex units also with pumps of different series
patented capacity adjustment system, with fixed stroke and connecting rod-cam system; mechanical piston return stroke and adjustment in the hydraulic circuit
maximum allowable thrust 3200 N
piston without seals
relief valve easily accessible for routine maintenance and setting

double diaphragms, sandwich type, with an intermediate film of oil
facility for fitting an alarm probe, an alarm switch or a local pressure gauge to detect diaphragms rupture
pump body made of metal or plastic; diaphragms made of PTFE
flanged suction and discharge connections
standard execution with double valves on all models
heating or cooling jacket on request

motor and speed reducer

worm-gear reducer, separate from the crank mechanisms
standard execution with 4-pole or 2-pole three-phase V1 type flanged electric motors
continuous manual adjustment, with pump at rest or in operation, from 0 to 100%, by handwheel; linear adjustment scale, with precision vernier
automatic control by pneumatic piston stroke adjusting positioner
automatic control by means of an electric actuator with single phase or three-phase servomotor, with handwheel for emergency manual adjustment
speed adjustable by means of variable-speed electric motor or speed variator
electric pulse generator with programmable pulsemeter to meter a fixed liquid quantity