The CPP – CMP – DMP – AM5 series metering pumps by POMPE CUCCHI have been designed and built to solve those metering problems that arise in various industrial sectors, with precision and safety.
Our technicians’ fundamental attitudes in the realization of the pumps were: maximum reliability, remarkable metering precision, minimum maintenance.
The CPP (piston) and CMP (diaphragm) metering pumps essentially consist of:
GEARMOTOR UNIT with a V-18 electric motor form in compliance with UNEL-MEC standards with wattage from 0.18 KW, 0.25 and 0.55 KW.
The motors are normally external, three-phase, 4-pole 50 Hz, closed and ventilated, with IP 55 protection. However, motors can be applied in versions that differ in voltage, frequencies and protection, as well as Ex-d.
Worm-helical wheel type speed reducer, with oil bath lubrication – ball bearing supporting – reduction ratios suitable for obtaining the piston rates indicated in the selection tables and for the power of the motor that is installed; also in this case, gearboxes can be used with reduction ratios that are suitable for obtaining cadences that are different from the standard ones.
MECHANICAL FLOW VARIATION GROUP of the spring type controlled by an eccentric; this determines the advancement of the piston for its entire stroke, while the spring in continuous tension causes the return movement of the piston or the suction phase. The flow rate variation is obtained by partializing the piston excursion by moving the plate connected to the piston away from the eccentric and thus preventing the eccentric from developing the maximum stroke of the piston. The control unit, enclosed in an aluminum body, is lubricated by means of an oil bath.
Flow rate adjustment is continuous from 0 to 100% and can be carried out both when the pump is not running and during operation:
- via manual adjustment on the knob;
- via an oil-pneumatic servo control with a 3-15 psi adjustment signal;
- via an electric servo control as per a 4-20 mA control signal.
- via an application of a frequency inverter with a 4 ÷ 20 MA input signal for the regulation of the motor rotation speed.
Different pump bodies can be connected to form multiple metering groups each with independent regulation.
METERING GROUP
The pumping head is connected to the pump body by means of an intermediate lantern which excludes the possibility of the pumped liquid coming into contact with the pump body and therefore with the control mechanism of the pump itself.
SAFETY VALVES in stainless steel or PVC with threaded or flanged UNI, ANSI or DIN connections.
PNEUMATIC ACCUMULATORS in materials suitable for the fluid, where a constant and non-pulsating flow is required.
PACKAGE METERING SYSTEMS complete with tanks of different capacities and including:
- filling lid;
- exhaust valve;
- visual level indicator;
and possibly:
- minimum level alarm;
- filters;
- shut-off valves;
- safety valves;
- agitators.
On the metering pumps of the CPP – CMP – DMP – AM5 series it is possible to obtain variations in flow rate even with variable speed motors, i.e. by varying the cadence of the piston. This system allows for double adjustment both on the piston stroke and on the number of piston strokes. It is also possible to do batch meterings by applying a proximity contact to the pump; this emits an impulse at each stroke of the piston; the number of strokes – therefore of volumes – necessary to obtain the pre-established quantity of product is preselected on an impulse counter. When this number is reached the pump stops and the totalizer is automatically put back to zero.
The construction of this series of metering pumps complies with the 2006/42/CE, 2014/30/UE, 2014/35/UE directives and with the UNI EN ISO 12100, UNI EN ISO 13732-1, UNI EN 809, UNI EN standards. ISO 14847. On request, versions compliant with the 2014/34/EU (ATEX) directive; it is also available with EAC (CU TR 010) – CU TR 012 certification.
The quality system of Pompe Cucchi Srl operates in accordance with the ISO 9001: 2015 standard.
APPLICATIONS
The CPP – CMP – DMP metering pumps are used wherever constant and precise metering is required.
They are normally used in:
WASTE WATER TREATMENT
CHEMICAL INDUSTRY
THE PHARMACEUTICAL INDUSTRY
TREATMENT OF THE WATERS FEEDING THE BOILER
TREATMENT OF WASHING WATER
TREATMENT OF INDUSTRIAL WATER
THE CINEMATOGRAPHY INDUSTRY
THE TEXTILE INDUSTRY
PAPER INDUSTRY
THE COSMETIC INDUSTRY
THE CONFECTIONERY INDUSTRY
THE DAIRY INDUSTRY
CONSTRUCTION FEATURES
The materials used in the construction of the pumping heads are normally:
VERSIONS OF “CPP”-CP PISTON PUMPS
X = Head and piston in AISI316L/Piston seal in NBR | It is possible to make heads in different materials (P.T.F.E. – P.V.D.F. – Hastelloy – carpenter etc.).
XT = Head and piston in AISI316L/Piston seal in PTFE
XV = Head and piston in AISI316L/Piston gasket in VYTON
XC = Head in AISI316L/Piston in ceramic/Piston seals in VYTON
P = Head and valves in PVC/Piston seal in VYTON/Balls in Pyrex/Piston in ceramic
P = Head and valves in PVC/Piston in AISI316L/Piston seal in NBR
dv = Double valves DIAPHRAGM PUMPS “CMP” – CM VERSIONS
X = Head and valves in AISI316L stainless steel/Piston in AISI 420/Diaphragm in Teflon/NBR
XR = Like version “X” with safety valve and oil recirculation
P = Head and valve in PVC/Piston in AISI 420/Diaphragm in Teflon/NBR
PR = As “P” version with safety valve and oil recirculation.
dv = Double valves VERSION
The valve versions are listed in the relative table.
CPP - CP PISTON PUMPING HEAD
The plunger piston version is recommended when:
- particularly high pressures must be reached;
- the pumped liquid does not contain suspended solid particles;
- possible leaks through the stuffing box, due to normal wear, are not significant.
On request it is possible to assemble pistons with different materials (stellite, chromium, etc.) The seals on the piston are made with lip rings in nitrile rubber or P.T.F.E. or VYTON.
CMP - CM PUMPING HEAD WITH HYDRAULIC MEMBRANE
The diaphragm version with interposed fluid is recommended when:
- fluid leaks must be excluded due to their riskiness;
- the pumped liquid contains solid particles in suspension. In this type of head, the diaphragm is operated by the piston by means of a hydraulic fluid; the pump flow rate thus varies proportionally to the piston stroke.
Versions with interposed fluid diaphragm can be provided. On request, it is possible to put on an oil recirculation valve which has a double function: safety valve and topping-up device to keep the quantity of oil in the chamber constant and therefore ensure maximum metering precision.
Section
The direct diaphragm version is recommended when:
- the pumped liquid contains abrasive particles in suspension;
- there are explosive solutions;
- there are highly toxic solutions or when the product must be prevented from coming into contact with the atmosphere.
In this type of pump the diaphragm is operated by an eccentric of the type with a spring return; this determines the advancement of the diaphragm for its entire stroke, while the continuous tension spring causes the diaphragm to return. In this version there is no oil in the membrane chamber so there is no pollution of the pumped liquid in case of membrane breakage.
