Mechanical diaphragm dosing pumps – D Series

Mechanical diaphragm dosing pumps – D Series

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„D” Series – Mechanical diaphragm metering pumps are normally used when:

  • The dosed liquid contains small amounts of suspended solids
  • A drip proof/air tight application is required
  • The dosed liquid is a toxic solution

Each pump is fitted with a standard gearbox reduction system with a vertical mounted motor. The reduction gearbox is of a standard endless screw plus worm-wheel type, supported by bearing, fully lubricated in oil bath.

Stroke adjustment can be carried with the pump at rest or in operation and it can be manual or automatic through automatic actuator driven by 4-20 mA; different BUS; pneumatic. As mechanical diaphragm they are easy for maintenance.

Furthermore they comply with ATEX standard, therefore they can be installed in Hazardous area.

„D” Series – Mechanical diaphragm metering pumps are normally used when:

  • The dosed liquid contains small amounts of suspended solids
  • A drip proof/air tight application is required
  • The dosed liquid is a toxic solution

Each pump is fitted with a standard gearbox reduction system with a vertical mounted motor. The reduction gearbox is of a standard endless screw plus worm-wheel type, supported by bearing, fully lubricated in oil bath.

Stroke adjustment can be carried with the pump at rest or in operation and it can be manual or automatic through automatic actuator driven by 4-20 mA; different BUS; pneumatic. As mechanical diaphragm they are easy for maintenance.

Furthermore they comply with ATEX standard, therefore they can be installed in Hazardous area.

Technical specifications
Max. capacity Qmaks. = 1400 l/h
Max. discharge pressure:
14 bars
Temperature: do 70 °C
Motor power: 0.09, 0.18, 0.25, 0.37, 0.55 or 0.75 kW, 1/3-phase, 1400 rpm
Head material: AISI 316L stainless steel, PP, PVC or PVDF
Valve ball material: AISI 316L stainless steel or “PYREX” glass
Valve seat material: AISI 316L stainless steel or PVDF
Membrane material: PTFE/NBR
Valve O-ring Material: FPM
Connection types*: ½”, ¾”, 1”, 1 ½” male BSP
*other connection types available on request
Typical applications
Example of using translate
Chemical dosing of substances, including: coagulants, fertilizers, acids, polymers, chemicals, etc. They can be used in applications such as:

  • fertigation
  • water treatment
  • paper industry
  • chemical industry
  • food industry
  • cooling towers
  • power plants
Product features

The SR series diaphragm dosing pumps are mechanical pumps designed for water treatment and industrial applications. They are reliable and easy to maintain, with the option of a flushing or leak recovery system.

The SR(D) version with a mechanical diaphragm is designed for pumping liquids with a low solid content in applications that do not require high pressure. These devices are ideal for applications where:

  • the dosed liquid contains small amounts of suspended solids,
  • a drip-proof/airtight application is required,
  • high pressure is not required,
  • the dosed liquid is a toxic solution.

The SR (D) series pumps have a very wide range of material options for components that come into contact with the medium. Thanks to the use of a diaphragm, they are very easy to maintain. SR (D) series pumps are the most durable and industrial mechanical diaphragm metering pumps. They have adjustable stroke both during pump operation and during downtime. Stroke adjustment can be performed manually or automatically using an automatic actuator driven by 4-20 mA; various BUS; or pneumatically.

Unlike the simpler SR (A) series model, they do not require hydraulic seals, which reduces the risk of leakage of the fluid being metered by the pump head. The diaphragm is made of PTFE/NBR and is compatible with most existing fluids. The pump heads can be supplied in various plastic or metal versions to make them fully suitable for dosing liquids.

The SR series pumps comply with the ATEX standard, making them suitable for installation in potentially explosive atmospheres.

Operation principle

Solenoid Dosing Pumps – SDP Series. Working Principle

Dosing pumps are positive displacement piston pumps with controlled volume. The reciprocating motion provides a sinusoidal flow rate, therefore the flow of the pumped product is not continuous, but pulsating. The flow rate or volume of the pump is controlled by changing the stroke of the piston/diaphragm. The reciprocating motion of the piston/diaphragm of the dosing pump determines the flow thanks to directional valves located at the inlet and outlet of the pump head. The liquid is pumped in the following phases:

Sucking phase
During the suction phase, the valve at the outlet closes (sealing the leak), and the valve at the suction opens. Fluid enters the pump head chamber. The theoretical volume is equal to the piston displacement.

Stamping phase
During the compression phase, the suction-side valve closes and the discharge-side valve opens. The liquid leaves the pump head and flows into the pipe.

Pumps version
Plunger dosing pumps | Doseuro A series

The SR-A series dosing pumps are plunger metering pumps with spring preload designed for water treatment and industrial applications. They are reliable and easy to maintain, with the option of a flushing or leak recovery system.

Tapflo A series dosing pumps are ideal for applications where:

  • the dosed liquid is non-abrasive,
  • a leak collection system is not necessary,
  • high pressure is required.

Want to know more? Check out Doseuro A dosing pumps.

Plunger dosing pumps. SRA series.
High-pressure plunger dosing pumps | Doseuro A series ‘HP’

The SR-A series dosing pumps are plunger metering pumps with spring preload designed for water treatment and industrial applications. They are reliable and easy to maintain, with the option of a flushing or leak recovery system.

Tapflo A series dosing pumps are ideal for applications where:

  • the dosed liquid is not abrasive,
  • a leak collection system is not necessary,
  • high pressure is required.

Want to know more? Check out Doseuro A ‘HP’ high-pressure dosing pumps.

Sandwich hydraulic diaphragm dosing pumps | Doseuro SD series

The SR series dosing pumps are spring-loaded sandwich hydraulic diaphragm dosing pump designed for water treatment and industrial applications.

Tapflo SD series dosing pumps are ideal for applications where:

  • the liquids contain small amounts of solid impurities,
  • a leak-tight pump design is required, leaks and air in the medium are unacceptable,
  • the dosed medium is toxic, corrosive or hazardous,
  • diaphragm rupture detection is required.

Want to know more? Check out Doseuro SD dosing pumps.

Mechanical diaphragm dosing pumps | Doseuro FM series

The FM series dosing pumps are spring-loaded plunger pumps designed for water treatment and industrial applications. They are reliable and easy to maintain, with the option of a flushing or leak recovery system.

Doseuro FM dosing pumps with a mechanical diaphragm are designed for pumping liquids with a low solid content. These devices are ideal for applications where:

  • the dosed liquid contains small amounts of suspended solids,
  • a drip-proof/airtight application is required,
  • the dosed liquid is hazardous,
  • high pressure is not required.

Want to know more? Check out Doseuro FM dosing pumps.

 

Hydraulic diaphragm dosing pumps | Doseuro B/BR series

The B and BR series dosing pumps are hydraulic diaphragm dosing pumps designed for water treatment and industrial applications, for pumping liquids with low solid content in applications requiring high pressure.

Tapflo B/BR series dosing pumps are ideal for applications where:

  • the liquids contain small amounts of solid impurities,
  • a leak-tight pump design is required, leaks and air in the medium are unacceptable,
  • the dosed liquid is a toxic, corrosive or hazardous solution,
  • high pressure may be required.

Want to know more? Check out Doseuro B/BR dosing pumps.

Construction
Mechanical diaphragm dosing pumps – D Series. Construction. Each Doseuro D series dosing pump is equipped as standard with a reduction gear with a vertically mounted motor. The reduction gear is equipped with a worm gear and worm wheel, supported by a system of bearings immersed in an oil bath.
1. Pump housing Aluminum casting.
2. Hydraulic pump head It draws liquid from the inlet valve and pushes it through the discharge valve using a diaphragm made of PTFE/NBR.
3. Regulation The piston stroke from 0% to 100% is achieved by turning a knob on a screw, which partially regulates the return of the slider, both when the pump is stationary and in motion. Automatic adjustment is possible.
4. Reducer assembly and gearbox Reduces the motor speed to the number required for dosing by converting rotary motion into linear reciprocating motion using an eccentric shaft, with a slider and return spring. The transmission has a flexible coupling.
5. Electric motor Three-phase or single-phase (CVE – Ex – Gr. B14 – Cl. F- 50/60 Hz- IP 55 or higher).
Hydraulic elements Plastic or metal depending on product compatibility.
Control system Rapida 2.0

The RAPIDA 2.0 system is a combination of a three-phase asynchronous electric motor and an inverter board, designed to enable motor speed control. Equipped with an LCD display, a control system and a multitude of functions that allow for immediate change of pump settings.

Functions:

  • the graphic display can show the actual pump flow rate in l/h, gal/h, percent, or frequency.
  • orientation 0°-90°
  • provides accurate dispensing
  • easy assembly
  • possibility of installation on existing pumps
  • reduced overall dimensions
  • ability to set a password
  • time tracking
  • the ability to modify pump curves according to actual installation conditions (maximizing pump accuracy)
  • remote inverter control capability.

Availability of the Rapida 2.0 system for individual Doseuro dosing pump models:

Pomp model: RAPIDA2.0 0.2
0.25 kW
RAPIDA2.0 0.3
0.37 kW
RAPIDA2.0 0.5
0.55 kW
RAPIDA2.0 0.7
0.75 kW
D050N bird
D100N bird bird
D101N bird bird
D121N bird
D122N bird bird
A-B-BR-SD 125N bird
A-B-BR-SD 175N bird bird
A-B-BR-SD 250N bird bird
A350N bird
Options and accessories

Solenoid Dosing Pumps – SDP Series. Options & Accessories

Safety valves

A safety valve is installed on the pump’s discharge pipe and is connected to the bypass pipe as a safety device, so that it opens (discharges) when the limit value is reached to protect the installation and pump from pressure overload.

Relief and check valves

A check valve is installed on the pump’s discharge line to counteract existing pressure on the suction side, in order to avoid siphoning. The use of this valve allows flow regulation in cases where the discharge pressure is low or non-existent.
A relief valve is installed on the pump’s discharge pipe and is connected to a bypass pipe as a safety device, so that it opens (discharges) when a limit value is reached in order to protect the system and pump from pressure overload.

Pulsation Dampeners – HSTX Type

316 stainless steel housing, consisting of two parts connected by a special closure, which under dynamic pressure tends to close automatically. Design compliant with ASME VIII° Div. 1. 1.

Pulsation Dampeners – HSTPVC Type

PVC body, consisting of two parts connected by a special hose, which under dynamic pressure tends to close automatically: + 50 °C. The membranes are compatible with the process liquid.

Polyethylene tanks

They are suitable for mounting with a dosing pump on top.

Calibration columns

A calibration column is installed on the suction line of a metering pump. It consists of a graduated cylinder. Its function is to determine the flow rate of the pump by checking the volume of liquid drawn in a given time, under actual operating conditions.

  • Technical specifications

  • Typical applications

  • Product features

  • Operation principle

  • Pumps version

  • Construction

  • Control system Rapida 2.0

  • Options and accessories

Max. capacity Qmaks. = 1400 l/h
Max. discharge pressure:
14 bars
Temperature: do 70 °C
Motor power: 0.09, 0.18, 0.25, 0.37, 0.55 or 0.75 kW, 1/3-phase, 1400 rpm
Head material: AISI 316L stainless steel, PP, PVC or PVDF
Valve ball material: AISI 316L stainless steel or “PYREX” glass
Valve seat material: AISI 316L stainless steel or PVDF
Membrane material: PTFE/NBR
Valve O-ring Material: FPM
Connection types*: ½”, ¾”, 1”, 1 ½” male BSP
*other connection types available on request

Video. Why quality control is so important when producing a pump?