High pressure plastic pump with booster (HP option)

The high pressure (HP) option is a compact booster that can be directly mounted to the pump. It is capable of doubling the delivery pressure and, for example, with an available air pressure of 7 bar the pressure can be up to 14 bar.

The design is based upon the standard DELLMECO pump made from machined polyethylene (PE). A pressure regulator is already incorporated with the unit for easy adjustment.

Applications include filter presses and slurry drying especially in the food and beverage industry as well as for water and wastewater management.

Plastic pump with solenoid valve (MV option)

DELLMECO plastic pumps with the MV option replace the standard air valve with a solenoid air valve. This enables media to be delivered in precise and constant volumes for such applications as found in the chemical industry.

The pump is fitted to a 2-position, 4-way solenoid valve. When the solenoid is unpowered, one chamber within the pump is pressurised with air, whilst the opposite chamber is discharged. When electric power is applied, the solenoid re-pressurises the discharged chamber and the opposite chamber is then discharged.

By alternatively turned on and off, the solenoid enables the unit to run like a standard DELLMECO pump and no lubrication is needed.

This option requires 24 V DC to operate.
Pumps with the MV option are non-submersible.

Barrier chamber system (BC option)

The comply with increased safety standards, this system replaces the standard diaphragm by a tandem arrangement of two diaphragms and a PE conductive barrier chamber filled with a non-conductive liquid (usually de-ionised water).

Sensors monitor the conductivity of this liquid and if the diaphragm fails, they detect the change in conductivity and an electronic signal is sent to a controller.

The barrier system is available with three options:
BC1 – barrier system with sensors, standard
BC2 – barrier system complete with sensors and controllers
BC3 – barrier system complete with sensor and controllers for expolosion-prood zones – ATEX

Stroke counting (SC options)

A sensor is installed in the central pump housing to count the strokes. The diaphragm is scanned without physical contact by this sensor – ensuring safe monitoring totally independent of external influences and the pump’s mode of operation. The signal from the sensor is sent as output data to either existing detectors or to a digital counter (also supplied). When the pre-set value is reached the stroke counter can be shut down with, for example, a solenoid valve.

The stroke counting system is available in five options:
SC1 – Stroke sensor (NAMUR type) also for explosion-proof zones
SC2 – Stroke counting system complete with sensor and counter
SC3 – Stroke counting system complete with sensor, counter and controller for explosion-proof zones
SC4 – Pneumatic stroke counting system with pressure transmitter
SC5 – Pneumatic stroke counting system with pressure transmitter and counter

In cases where only the sensor id required (code SC1), it has to be connected to an existing controller with a Namur type inlet. For explosion-proof applications, the stroke counting option requires an intrinsically safe controller (code SC3), which had to be installed between the sensor and counter. The wiring diaphragm and technical data is supplied with the electric units. The controllers have to be installed an a suitalbe cabinet.

Diaphragm monitoring (DM options)

Although DELLMECO diaphragms are designed for optimum service and maximum lifespan, regular maintenance must be included as part of the service programme. This is called ‘preventive maintenance planning’ (PMP). However, for increased security in sensitive applications, any pump failure from, for example, the media leaking into the pump central housing can be simply and effectively prevented by installing a DELLMECO diaphragm monitoring system.

A capacitive diaphragm sensor is mounted in the pump muffler which monitors any media in proximity to the sensor. Thus, immediate remedial actions can by taken.

The diaphragm monitoring system is available in two options:
DM1 – Diaphragm sensor (NAMUR type) also for explosion-proof zones
DM2 – Diaphragm monitoring system complete with sensor and controller (S)

Flange connections (PN10 options)

This option offers the possibility to use flange connectors according to DIN/PN10. The inlet/outlet flange connections are by thread bushings made of stainless steel. The attached O-rings have to be inserted into the grooves of the manifolds to improve sealing before connecting the pump.

F1 – Flanfe connection PN 10 EPDM
F2 – Flange connecton PN 10 NBR
F3 – Flange connection PN 10 FEP/FPM

Split connections (S options)

All pump models can be fitted with split connections (code S).

The pump can be converted from a standard double-action air-driven diaphragm pump into a unit with two single chambers. The suction and discharge connection are replaced by a split sleeve with a separate suction and discharge for both chambers. Both chambers are independent and by having them with the same drive it means there can be two media streams in a 1:1 ratio.

Heating/cooling jacket (HJ options)

The heating/cooling jacket is used when the pumped media has to maintain a specific high or low temperature, throughout the pumping process. A heating or cooling medium is continuously circulated and the jacket also covers all the wetted parts of the pump. This option is available for all our hygienic pump series.